drivers/pinctrl/intel/pinctrl-cherryview.c

   1 /*
   2  * Cherryview/Braswell pinctrl driver
   3  *
   4  * Copyright (C) 2014, Intel Corporation
   5  * Author: Mika Westerberg <mika.westerberg@linux.intel.com>
   6  *
   7  * This driver is based on the original Cherryview GPIO driver by
   8  *   Ning Li <ning.li@intel.com>
   9  *   Alan Cox <alan@linux.intel.com>
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License version 2 as
  13  * published by the Free Software Foundation.
  14  */
  15
  16 #include <linux/dmi.h>
  17 #include <linux/kernel.h>
  18 #include <linux/module.h>
  19 #include <linux/init.h>
  20 #include <linux/types.h>
  21 #include <linux/gpio.h>
  22 #include <linux/gpio/driver.h>
  23 #include <linux/acpi.h>
  24 #include <linux/pinctrl/pinctrl.h>
  25 #include <linux/pinctrl/pinmux.h>
  26 #include <linux/pinctrl/pinconf.h>
  27 #include <linux/pinctrl/pinconf-generic.h>
  28 #include <linux/platform_device.h>
  29
  30 #define CHV_INTSTAT                     0x300
  31 #define CHV_INTMASK                     0x380
  32
  33 #define FAMILY_PAD_REGS_OFF             0x4400
  34 #define FAMILY_PAD_REGS_SIZE            0x400
  35 #define MAX_FAMILY_PAD_GPIO_NO          15
  36 #define GPIO_REGS_SIZE                  8
  37
  38 #define CHV_PADCTRL0                    0x000
  39 #define CHV_PADCTRL0_INTSEL_SHIFT       28
  40 #define CHV_PADCTRL0_INTSEL_MASK        (0xf << CHV_PADCTRL0_INTSEL_SHIFT)
  41 #define CHV_PADCTRL0_TERM_UP            BIT(23)
  42 #define CHV_PADCTRL0_TERM_SHIFT         20
  43 #define CHV_PADCTRL0_TERM_MASK          (7 << CHV_PADCTRL0_TERM_SHIFT)
  44 #define CHV_PADCTRL0_TERM_20K           1
  45 #define CHV_PADCTRL0_TERM_5K            2
  46 #define CHV_PADCTRL0_TERM_1K            4
  47 #define CHV_PADCTRL0_PMODE_SHIFT        16
  48 #define CHV_PADCTRL0_PMODE_MASK         (0xf << CHV_PADCTRL0_PMODE_SHIFT)
  49 #define CHV_PADCTRL0_GPIOEN             BIT(15)
  50 #define CHV_PADCTRL0_GPIOCFG_SHIFT      8
  51 #define CHV_PADCTRL0_GPIOCFG_MASK       (7 << CHV_PADCTRL0_GPIOCFG_SHIFT)
  52 #define CHV_PADCTRL0_GPIOCFG_GPIO       0
  53 #define CHV_PADCTRL0_GPIOCFG_GPO        1
  54 #define CHV_PADCTRL0_GPIOCFG_GPI        2
  55 #define CHV_PADCTRL0_GPIOCFG_HIZ        3
  56 #define CHV_PADCTRL0_GPIOTXSTATE        BIT(1)
  57 #define CHV_PADCTRL0_GPIORXSTATE        BIT(0)
  58
  59 #define CHV_PADCTRL1                    0x004
  60 #define CHV_PADCTRL1_CFGLOCK            BIT(31)
  61 #define CHV_PADCTRL1_INVRXTX_SHIFT      4
  62 #define CHV_PADCTRL1_INVRXTX_MASK       (0xf << CHV_PADCTRL1_INVRXTX_SHIFT)
  63 #define CHV_PADCTRL1_INVRXTX_TXENABLE   (2 << CHV_PADCTRL1_INVRXTX_SHIFT)
  64 #define CHV_PADCTRL1_ODEN               BIT(3)
  65 #define CHV_PADCTRL1_INVRXTX_RXDATA     (4 << CHV_PADCTRL1_INVRXTX_SHIFT)
  66 #define CHV_PADCTRL1_INTWAKECFG_MASK    7
  67 #define CHV_PADCTRL1_INTWAKECFG_FALLING 1
  68 #define CHV_PADCTRL1_INTWAKECFG_RISING  2
  69 #define CHV_PADCTRL1_INTWAKECFG_BOTH    3
  70 #define CHV_PADCTRL1_INTWAKECFG_LEVEL   4
  71
  72 /**
  73  * struct chv_alternate_function - A per group or per pin alternate function
  74  * @pin: Pin number (only used in per pin configs)
  75  * @mode: Mode the pin should be set in
  76  * @invert_oe: Invert OE for this pin
  77  */
  78 struct chv_alternate_function {
  79         unsigned pin;
  80         u8 mode;
  81         bool invert_oe;
  82 };
  83
  84 /**
  85  * struct chv_pincgroup - describes a CHV pin group
  86  * @name: Name of the group
  87  * @pins: An array of pins in this group
  88  * @npins: Number of pins in this group
  89  * @altfunc: Alternate function applied to all pins in this group
  90  * @overrides: Alternate function override per pin or %NULL if not used
  91  * @noverrides: Number of per pin alternate function overrides if
  92  *              @overrides != NULL.
  93  */
  94 struct chv_pingroup {
  95         const char *name;
  96         const unsigned *pins;
  97         size_t npins;
  98         struct chv_alternate_function altfunc;
  99         const struct chv_alternate_function *overrides;
 100         size_t noverrides;
 101 };
 102
 103 /**
 104  * struct chv_function - A CHV pinmux function
 105  * @name: Name of the function
 106  * @groups: An array of groups for this function
 107  * @ngroups: Number of groups in @groups
 108  */
 109 struct chv_function {
 110         const char *name;
 111         const char * const *groups;
 112         size_t ngroups;
 113 };
 114
 115 /**
 116  * struct chv_gpio_pinrange - A range of pins that can be used as GPIOs
 117  * @base: Start pin number
 118  * @npins: Number of pins in this range
 119  */
 120 struct chv_gpio_pinrange {
 121         unsigned base;
 122         unsigned npins;
 123 };
 124
 125 /**
 126  * struct chv_community - A community specific configuration
 127  * @uid: ACPI _UID used to match the community
 128  * @pins: All pins in this community
 129  * @npins: Number of pins
 130  * @groups: All groups in this community
 131  * @ngroups: Number of groups
 132  * @functions: All functions in this community
 133  * @nfunctions: Number of functions
 134  * @ngpios: Number of GPIOs in this community
 135  * @gpio_ranges: An array of GPIO ranges in this community
 136  * @ngpio_ranges: Number of GPIO ranges
 137  * @ngpios: Total number of GPIOs in this community
 138  * @nirqs: Total number of IRQs this community can generate
 139  */
 140 struct chv_community {
 141         const char *uid;
 142         const struct pinctrl_pin_desc *pins;
 143         size_t npins;
 144         const struct chv_pingroup *groups;
 145         size_t ngroups;
 146         const struct chv_function *functions;
 147         size_t nfunctions;
 148         const struct chv_gpio_pinrange *gpio_ranges;
 149         size_t ngpio_ranges;
 150         size_t ngpios;
 151         size_t nirqs;
 152         acpi_adr_space_type acpi_space_id;
 153 };
 154
 155 struct chv_pin_context {
 156         u32 padctrl0;
 157         u32 padctrl1;
 158 };
 159
 160 /**
 161  * struct chv_pinctrl - CHV pinctrl private structure
 162  * @dev: Pointer to the parent device
 163  * @pctldesc: Pin controller description
 164  * @pctldev: Pointer to the pin controller device
 165  * @chip: GPIO chip in this pin controller
 166  * @regs: MMIO registers
 167  * @intr_lines: Stores mapping between 16 HW interrupt wires and GPIO
 168  *              offset (in GPIO number space)
 169  * @community: Community this pinctrl instance represents
 170  *
 171  * The first group in @groups is expected to contain all pins that can be
 172  * used as GPIOs.
 173  */
 174 struct chv_pinctrl {
 175         struct device *dev;
 176         struct pinctrl_desc pctldesc;
 177         struct pinctrl_dev *pctldev;
 178         struct gpio_chip chip;
 179         void __iomem *regs;
 180         unsigned intr_lines[16];
 181         const struct chv_community *community;
 182         u32 saved_intmask;
 183         struct chv_pin_context *saved_pin_context;
 184 };
 185
 186 #define ALTERNATE_FUNCTION(p, m, i)             \
 187         {                                       \
 188                 .pin = (p),                     \
 189                 .mode = (m),                    \
 190                 .invert_oe = (i),               \
 191         }
 192
 193 #define PIN_GROUP(n, p, m, i)                   \
 194         {                                       \
 195                 .name = (n),                    \
 196                 .pins = (p),                    \
 197                 .npins = ARRAY_SIZE((p)),       \
 198                 .altfunc.mode = (m),            \
 199                 .altfunc.invert_oe = (i),       \
 200         }
 201
 202 #define PIN_GROUP_WITH_OVERRIDE(n, p, m, i, o)  \
 203         {                                       \
 204                 .name = (n),                    \
 205                 .pins = (p),                    \
 206                 .npins = ARRAY_SIZE((p)),       \
 207                 .altfunc.mode = (m),            \
 208                 .altfunc.invert_oe = (i),       \
 209                 .overrides = (o),               \
 210                 .noverrides = ARRAY_SIZE((o)),  \
 211         }
 212
 213 #define FUNCTION(n, g)                          \
 214         {                                       \
 215                 .name = (n),                    \
 216                 .groups = (g),                  \
 217                 .ngroups = ARRAY_SIZE((g)),     \
 218         }
 219
 220 #define GPIO_PINRANGE(start, end)               \
 221         {                                       \
 222                 .base = (start),                \
 223                 .npins = (end) - (start) + 1,   \
 224         }
 225
 226 static const struct pinctrl_pin_desc southwest_pins[] = {
 227         PINCTRL_PIN(0, "FST_SPI_D2"),
 228         PINCTRL_PIN(1, "FST_SPI_D0"),
 229         PINCTRL_PIN(2, "FST_SPI_CLK"),
 230         PINCTRL_PIN(3, "FST_SPI_D3"),
 231         PINCTRL_PIN(4, "FST_SPI_CS1_B"),
 232         PINCTRL_PIN(5, "FST_SPI_D1"),
 233         PINCTRL_PIN(6, "FST_SPI_CS0_B"),
 234         PINCTRL_PIN(7, "FST_SPI_CS2_B"),
 235
 236         PINCTRL_PIN(15, "UART1_RTS_B"),
 237         PINCTRL_PIN(16, "UART1_RXD"),
 238         PINCTRL_PIN(17, "UART2_RXD"),
 239         PINCTRL_PIN(18, "UART1_CTS_B"),
 240         PINCTRL_PIN(19, "UART2_RTS_B"),
 241         PINCTRL_PIN(20, "UART1_TXD"),
 242         PINCTRL_PIN(21, "UART2_TXD"),
 243         PINCTRL_PIN(22, "UART2_CTS_B"),
 244
 245         PINCTRL_PIN(30, "MF_HDA_CLK"),
 246         PINCTRL_PIN(31, "MF_HDA_RSTB"),
 247         PINCTRL_PIN(32, "MF_HDA_SDIO"),
 248         PINCTRL_PIN(33, "MF_HDA_SDO"),
 249         PINCTRL_PIN(34, "MF_HDA_DOCKRSTB"),
 250         PINCTRL_PIN(35, "MF_HDA_SYNC"),
 251         PINCTRL_PIN(36, "MF_HDA_SDI1"),
 252         PINCTRL_PIN(37, "MF_HDA_DOCKENB"),
 253
 254         PINCTRL_PIN(45, "I2C5_SDA"),
 255         PINCTRL_PIN(46, "I2C4_SDA"),
 256         PINCTRL_PIN(47, "I2C6_SDA"),
 257         PINCTRL_PIN(48, "I2C5_SCL"),
 258         PINCTRL_PIN(49, "I2C_NFC_SDA"),
 259         PINCTRL_PIN(50, "I2C4_SCL"),
 260         PINCTRL_PIN(51, "I2C6_SCL"),
 261         PINCTRL_PIN(52, "I2C_NFC_SCL"),
 262
 263         PINCTRL_PIN(60, "I2C1_SDA"),
 264         PINCTRL_PIN(61, "I2C0_SDA"),
 265         PINCTRL_PIN(62, "I2C2_SDA"),
 266         PINCTRL_PIN(63, "I2C1_SCL"),
 267         PINCTRL_PIN(64, "I2C3_SDA"),
 268         PINCTRL_PIN(65, "I2C0_SCL"),
 269         PINCTRL_PIN(66, "I2C2_SCL"),
 270         PINCTRL_PIN(67, "I2C3_SCL"),
 271
 272         PINCTRL_PIN(75, "SATA_GP0"),
 273         PINCTRL_PIN(76, "SATA_GP1"),
 274         PINCTRL_PIN(77, "SATA_LEDN"),
 275         PINCTRL_PIN(78, "SATA_GP2"),
 276         PINCTRL_PIN(79, "MF_SMB_ALERTB"),
 277         PINCTRL_PIN(80, "SATA_GP3"),
 278         PINCTRL_PIN(81, "MF_SMB_CLK"),
 279         PINCTRL_PIN(82, "MF_SMB_DATA"),
 280
 281         PINCTRL_PIN(90, "PCIE_CLKREQ0B"),
 282         PINCTRL_PIN(91, "PCIE_CLKREQ1B"),
 283         PINCTRL_PIN(92, "GP_SSP_2_CLK"),
 284         PINCTRL_PIN(93, "PCIE_CLKREQ2B"),
 285         PINCTRL_PIN(94, "GP_SSP_2_RXD"),
 286         PINCTRL_PIN(95, "PCIE_CLKREQ3B"),
 287         PINCTRL_PIN(96, "GP_SSP_2_FS"),
 288         PINCTRL_PIN(97, "GP_SSP_2_TXD"),
 289 };
 290
 291 static const unsigned southwest_fspi_pins[] = { 0, 1, 2, 3, 4, 5, 6, 7 };
 292 static const unsigned southwest_uart0_pins[] = { 16, 20 };
 293 static const unsigned southwest_uart1_pins[] = { 15, 16, 18, 20 };
 294 static const unsigned southwest_uart2_pins[] = { 17, 19, 21, 22 };
 295 static const unsigned southwest_i2c0_pins[] = { 61, 65 };
 296 static const unsigned southwest_hda_pins[] = { 30, 31, 32, 33, 34, 35, 36, 37 };
 297 static const unsigned southwest_lpe_pins[] = {
 298         30, 31, 32, 33, 34, 35, 36, 37, 92, 94, 96, 97,
 299 };
 300 static const unsigned southwest_i2c1_pins[] = { 60, 63 };
 301 static const unsigned southwest_i2c2_pins[] = { 62, 66 };
 302 static const unsigned southwest_i2c3_pins[] = { 64, 67 };
 303 static const unsigned southwest_i2c4_pins[] = { 46, 50 };
 304 static const unsigned southwest_i2c5_pins[] = { 45, 48 };
 305 static const unsigned southwest_i2c6_pins[] = { 47, 51 };
 306 static const unsigned southwest_i2c_nfc_pins[] = { 49, 52 };
 307 static const unsigned southwest_smbus_pins[] = { 79, 81, 82 };
 308 static const unsigned southwest_spi3_pins[] = { 76, 79, 80, 81, 82 };
 309
 310 /* LPE I2S TXD pins need to have invert_oe set */
 311 static const struct chv_alternate_function southwest_lpe_altfuncs[] = {
 312         ALTERNATE_FUNCTION(30, 1, true),
 313         ALTERNATE_FUNCTION(34, 1, true),
 314         ALTERNATE_FUNCTION(97, 1, true),
 315 };
 316
 317 /*
 318  * Two spi3 chipselects are available in different mode than the main spi3
 319  * functionality, which is using mode 1.
 320  */
 321 static const struct chv_alternate_function southwest_spi3_altfuncs[] = {
 322         ALTERNATE_FUNCTION(76, 3, false),
 323         ALTERNATE_FUNCTION(80, 3, false),
 324 };
 325
 326 static const struct chv_pingroup southwest_groups[] = {
 327         PIN_GROUP("uart0_grp", southwest_uart0_pins, 2, false),
 328         PIN_GROUP("uart1_grp", southwest_uart1_pins, 1, false),
 329         PIN_GROUP("uart2_grp", southwest_uart2_pins, 1, false),
 330         PIN_GROUP("hda_grp", southwest_hda_pins, 2, false),
 331         PIN_GROUP("i2c0_grp", southwest_i2c0_pins, 1, true),
 332         PIN_GROUP("i2c1_grp", southwest_i2c1_pins, 1, true),
 333         PIN_GROUP("i2c2_grp", southwest_i2c2_pins, 1, true),
 334         PIN_GROUP("i2c3_grp", southwest_i2c3_pins, 1, true),
 335         PIN_GROUP("i2c4_grp", southwest_i2c4_pins, 1, true),
 336         PIN_GROUP("i2c5_grp", southwest_i2c5_pins, 1, true),
 337         PIN_GROUP("i2c6_grp", southwest_i2c6_pins, 1, true),
 338         PIN_GROUP("i2c_nfc_grp", southwest_i2c_nfc_pins, 2, true),
 339
 340         PIN_GROUP_WITH_OVERRIDE("lpe_grp", southwest_lpe_pins, 1, false,
 341                                 southwest_lpe_altfuncs),
 342         PIN_GROUP_WITH_OVERRIDE("spi3_grp", southwest_spi3_pins, 2, false,
 343                                 southwest_spi3_altfuncs),
 344 };
 345
 346 static const char * const southwest_uart0_groups[] = { "uart0_grp" };
 347 static const char * const southwest_uart1_groups[] = { "uart1_grp" };
 348 static const char * const southwest_uart2_groups[] = { "uart2_grp" };
 349 static const char * const southwest_hda_groups[] = { "hda_grp" };
 350 static const char * const southwest_lpe_groups[] = { "lpe_grp" };
 351 static const char * const southwest_i2c0_groups[] = { "i2c0_grp" };
 352 static const char * const southwest_i2c1_groups[] = { "i2c1_grp" };
 353 static const char * const southwest_i2c2_groups[] = { "i2c2_grp" };
 354 static const char * const southwest_i2c3_groups[] = { "i2c3_grp" };
 355 static const char * const southwest_i2c4_groups[] = { "i2c4_grp" };
 356 static const char * const southwest_i2c5_groups[] = { "i2c5_grp" };
 357 static const char * const southwest_i2c6_groups[] = { "i2c6_grp" };
 358 static const char * const southwest_i2c_nfc_groups[] = { "i2c_nfc_grp" };
 359 static const char * const southwest_spi3_groups[] = { "spi3_grp" };
 360
 361 /*
 362  * Only do pinmuxing for certain LPSS devices for now. Rest of the pins are
 363  * enabled only as GPIOs.
 364  */
 365 static const struct chv_function southwest_functions[] = {
 366         FUNCTION("uart0", southwest_uart0_groups),
 367         FUNCTION("uart1", southwest_uart1_groups),
 368         FUNCTION("uart2", southwest_uart2_groups),
 369         FUNCTION("hda", southwest_hda_groups),
 370         FUNCTION("lpe", southwest_lpe_groups),
 371         FUNCTION("i2c0", southwest_i2c0_groups),
 372         FUNCTION("i2c1", southwest_i2c1_groups),
 373         FUNCTION("i2c2", southwest_i2c2_groups),
 374         FUNCTION("i2c3", southwest_i2c3_groups),
 375         FUNCTION("i2c4", southwest_i2c4_groups),
 376         FUNCTION("i2c5", southwest_i2c5_groups),
 377         FUNCTION("i2c6", southwest_i2c6_groups),
 378         FUNCTION("i2c_nfc", southwest_i2c_nfc_groups),
 379         FUNCTION("spi3", southwest_spi3_groups),
 380 };
 381
 382 static const struct chv_gpio_pinrange southwest_gpio_ranges[] = {
 383         GPIO_PINRANGE(0, 7),
 384         GPIO_PINRANGE(15, 22),
 385         GPIO_PINRANGE(30, 37),
 386         GPIO_PINRANGE(45, 52),
 387         GPIO_PINRANGE(60, 67),
 388         GPIO_PINRANGE(75, 82),
 389         GPIO_PINRANGE(90, 97),
 390 };
 391
 392 static const struct chv_community southwest_community = {
 393         .uid = "1",
 394         .pins = southwest_pins,
 395         .npins = ARRAY_SIZE(southwest_pins),
 396         .groups = southwest_groups,
 397         .ngroups = ARRAY_SIZE(southwest_groups),
 398         .functions = southwest_functions,
 399         .nfunctions = ARRAY_SIZE(southwest_functions),
 400         .gpio_ranges = southwest_gpio_ranges,
 401         .ngpio_ranges = ARRAY_SIZE(southwest_gpio_ranges),
 402         .ngpios = ARRAY_SIZE(southwest_pins),
 403         /*
 404          * Southwest community can benerate GPIO interrupts only for the
 405          * first 8 interrupts. The upper half (8-15) can only be used to
 406          * trigger GPEs.
 407          */
 408         .nirqs = 8,
 409         .acpi_space_id = 0x91,
 410 };
 411
 412 static const struct pinctrl_pin_desc north_pins[] = {
 413         PINCTRL_PIN(0, "GPIO_DFX_0"),
 414         PINCTRL_PIN(1, "GPIO_DFX_3"),
 415         PINCTRL_PIN(2, "GPIO_DFX_7"),
 416         PINCTRL_PIN(3, "GPIO_DFX_1"),
 417         PINCTRL_PIN(4, "GPIO_DFX_5"),
 418         PINCTRL_PIN(5, "GPIO_DFX_4"),
 419         PINCTRL_PIN(6, "GPIO_DFX_8"),
 420         PINCTRL_PIN(7, "GPIO_DFX_2"),
 421         PINCTRL_PIN(8, "GPIO_DFX_6"),
 422
 423         PINCTRL_PIN(15, "GPIO_SUS0"),
 424         PINCTRL_PIN(16, "SEC_GPIO_SUS10"),
 425         PINCTRL_PIN(17, "GPIO_SUS3"),
 426         PINCTRL_PIN(18, "GPIO_SUS7"),
 427         PINCTRL_PIN(19, "GPIO_SUS1"),
 428         PINCTRL_PIN(20, "GPIO_SUS5"),
 429         PINCTRL_PIN(21, "SEC_GPIO_SUS11"),
 430         PINCTRL_PIN(22, "GPIO_SUS4"),
 431         PINCTRL_PIN(23, "SEC_GPIO_SUS8"),
 432         PINCTRL_PIN(24, "GPIO_SUS2"),
 433         PINCTRL_PIN(25, "GPIO_SUS6"),
 434         PINCTRL_PIN(26, "CX_PREQ_B"),
 435         PINCTRL_PIN(27, "SEC_GPIO_SUS9"),
 436
 437         PINCTRL_PIN(30, "TRST_B"),
 438         PINCTRL_PIN(31, "TCK"),
 439         PINCTRL_PIN(32, "PROCHOT_B"),
 440         PINCTRL_PIN(33, "SVIDO_DATA"),
 441         PINCTRL_PIN(34, "TMS"),
 442         PINCTRL_PIN(35, "CX_PRDY_B_2"),
 443         PINCTRL_PIN(36, "TDO_2"),
 444         PINCTRL_PIN(37, "CX_PRDY_B"),
 445         PINCTRL_PIN(38, "SVIDO_ALERT_B"),
 446         PINCTRL_PIN(39, "TDO"),
 447         PINCTRL_PIN(40, "SVIDO_CLK"),
 448         PINCTRL_PIN(41, "TDI"),
 449
 450         PINCTRL_PIN(45, "GP_CAMERASB_05"),
 451         PINCTRL_PIN(46, "GP_CAMERASB_02"),
 452         PINCTRL_PIN(47, "GP_CAMERASB_08"),
 453         PINCTRL_PIN(48, "GP_CAMERASB_00"),
 454         PINCTRL_PIN(49, "GP_CAMERASB_06"),
 455         PINCTRL_PIN(50, "GP_CAMERASB_10"),
 456         PINCTRL_PIN(51, "GP_CAMERASB_03"),
 457         PINCTRL_PIN(52, "GP_CAMERASB_09"),
 458         PINCTRL_PIN(53, "GP_CAMERASB_01"),
 459         PINCTRL_PIN(54, "GP_CAMERASB_07"),
 460         PINCTRL_PIN(55, "GP_CAMERASB_11"),
 461         PINCTRL_PIN(56, "GP_CAMERASB_04"),
 462
 463         PINCTRL_PIN(60, "PANEL0_BKLTEN"),
 464         PINCTRL_PIN(61, "HV_DDI0_HPD"),
 465         PINCTRL_PIN(62, "HV_DDI2_DDC_SDA"),
 466         PINCTRL_PIN(63, "PANEL1_BKLTCTL"),
 467         PINCTRL_PIN(64, "HV_DDI1_HPD"),
 468         PINCTRL_PIN(65, "PANEL0_BKLTCTL"),
 469         PINCTRL_PIN(66, "HV_DDI0_DDC_SDA"),
 470         PINCTRL_PIN(67, "HV_DDI2_DDC_SCL"),
 471         PINCTRL_PIN(68, "HV_DDI2_HPD"),
 472         PINCTRL_PIN(69, "PANEL1_VDDEN"),
 473         PINCTRL_PIN(70, "PANEL1_BKLTEN"),
 474         PINCTRL_PIN(71, "HV_DDI0_DDC_SCL"),
 475         PINCTRL_PIN(72, "PANEL0_VDDEN"),
 476 };
 477
 478 static const struct chv_gpio_pinrange north_gpio_ranges[] = {
 479         GPIO_PINRANGE(0, 8),
 480         GPIO_PINRANGE(15, 27),
 481         GPIO_PINRANGE(30, 41),
 482         GPIO_PINRANGE(45, 56),
 483         GPIO_PINRANGE(60, 72),
 484 };
 485
 486 static const struct chv_community north_community = {
 487         .uid = "2",
 488         .pins = north_pins,
 489         .npins = ARRAY_SIZE(north_pins),
 490         .gpio_ranges = north_gpio_ranges,
 491         .ngpio_ranges = ARRAY_SIZE(north_gpio_ranges),
 492         .ngpios = ARRAY_SIZE(north_pins),
 493         /*
 494          * North community can benerate GPIO interrupts only for the first
 495          * 8 interrupts. The upper half (8-15) can only be used to trigger
 496          * GPEs.
 497          */
 498         .nirqs = 8,
 499         .acpi_space_id = 0x92,
 500 };
 501
 502 static const struct pinctrl_pin_desc east_pins[] = {
 503         PINCTRL_PIN(0, "PMU_SLP_S3_B"),
 504         PINCTRL_PIN(1, "PMU_BATLOW_B"),
 505         PINCTRL_PIN(2, "SUS_STAT_B"),
 506         PINCTRL_PIN(3, "PMU_SLP_S0IX_B"),
 507         PINCTRL_PIN(4, "PMU_AC_PRESENT"),
 508         PINCTRL_PIN(5, "PMU_PLTRST_B"),
 509         PINCTRL_PIN(6, "PMU_SUSCLK"),
 510         PINCTRL_PIN(7, "PMU_SLP_LAN_B"),
 511         PINCTRL_PIN(8, "PMU_PWRBTN_B"),
 512         PINCTRL_PIN(9, "PMU_SLP_S4_B"),
 513         PINCTRL_PIN(10, "PMU_WAKE_B"),
 514         PINCTRL_PIN(11, "PMU_WAKE_LAN_B"),
 515
 516         PINCTRL_PIN(15, "MF_ISH_GPIO_3"),
 517         PINCTRL_PIN(16, "MF_ISH_GPIO_7"),
 518         PINCTRL_PIN(17, "MF_ISH_I2C1_SCL"),
 519         PINCTRL_PIN(18, "MF_ISH_GPIO_1"),
 520         PINCTRL_PIN(19, "MF_ISH_GPIO_5"),
 521         PINCTRL_PIN(20, "MF_ISH_GPIO_9"),
 522         PINCTRL_PIN(21, "MF_ISH_GPIO_0"),
 523         PINCTRL_PIN(22, "MF_ISH_GPIO_4"),
 524         PINCTRL_PIN(23, "MF_ISH_GPIO_8"),
 525         PINCTRL_PIN(24, "MF_ISH_GPIO_2"),
 526         PINCTRL_PIN(25, "MF_ISH_GPIO_6"),
 527         PINCTRL_PIN(26, "MF_ISH_I2C1_SDA"),
 528 };
 529
 530 static const struct chv_gpio_pinrange east_gpio_ranges[] = {
 531         GPIO_PINRANGE(0, 11),
 532         GPIO_PINRANGE(15, 26),
 533 };
 534
 535 static const struct chv_community east_community = {
 536         .uid = "3",
 537         .pins = east_pins,
 538         .npins = ARRAY_SIZE(east_pins),
 539         .gpio_ranges = east_gpio_ranges,
 540         .ngpio_ranges = ARRAY_SIZE(east_gpio_ranges),
 541         .ngpios = ARRAY_SIZE(east_pins),
 542         .nirqs = 16,
 543         .acpi_space_id = 0x93,
 544 };
 545
 546 static const struct pinctrl_pin_desc southeast_pins[] = {
 547         PINCTRL_PIN(0, "MF_PLT_CLK0"),
 548         PINCTRL_PIN(1, "PWM1"),
 549         PINCTRL_PIN(2, "MF_PLT_CLK1"),
 550         PINCTRL_PIN(3, "MF_PLT_CLK4"),
 551         PINCTRL_PIN(4, "MF_PLT_CLK3"),
 552         PINCTRL_PIN(5, "PWM0"),
 553         PINCTRL_PIN(6, "MF_PLT_CLK5"),
 554         PINCTRL_PIN(7, "MF_PLT_CLK2"),
 555
 556         PINCTRL_PIN(15, "SDMMC2_D3_CD_B"),
 557         PINCTRL_PIN(16, "SDMMC1_CLK"),
 558         PINCTRL_PIN(17, "SDMMC1_D0"),
 559         PINCTRL_PIN(18, "SDMMC2_D1"),
 560         PINCTRL_PIN(19, "SDMMC2_CLK"),
 561         PINCTRL_PIN(20, "SDMMC1_D2"),
 562         PINCTRL_PIN(21, "SDMMC2_D2"),
 563         PINCTRL_PIN(22, "SDMMC2_CMD"),
 564         PINCTRL_PIN(23, "SDMMC1_CMD"),
 565         PINCTRL_PIN(24, "SDMMC1_D1"),
 566         PINCTRL_PIN(25, "SDMMC2_D0"),
 567         PINCTRL_PIN(26, "SDMMC1_D3_CD_B"),
 568
 569         PINCTRL_PIN(30, "SDMMC3_D1"),
 570         PINCTRL_PIN(31, "SDMMC3_CLK"),
 571         PINCTRL_PIN(32, "SDMMC3_D3"),
 572         PINCTRL_PIN(33, "SDMMC3_D2"),
 573         PINCTRL_PIN(34, "SDMMC3_CMD"),
 574         PINCTRL_PIN(35, "SDMMC3_D0"),
 575
 576         PINCTRL_PIN(45, "MF_LPC_AD2"),
 577         PINCTRL_PIN(46, "LPC_CLKRUNB"),
 578         PINCTRL_PIN(47, "MF_LPC_AD0"),
 579         PINCTRL_PIN(48, "LPC_FRAMEB"),
 580         PINCTRL_PIN(49, "MF_LPC_CLKOUT1"),
 581         PINCTRL_PIN(50, "MF_LPC_AD3"),
 582         PINCTRL_PIN(51, "MF_LPC_CLKOUT0"),
 583         PINCTRL_PIN(52, "MF_LPC_AD1"),
 584
 585         PINCTRL_PIN(60, "SPI1_MISO"),
 586         PINCTRL_PIN(61, "SPI1_CSO_B"),
 587         PINCTRL_PIN(62, "SPI1_CLK"),
 588         PINCTRL_PIN(63, "MMC1_D6"),
 589         PINCTRL_PIN(64, "SPI1_MOSI"),
 590         PINCTRL_PIN(65, "MMC1_D5"),
 591         PINCTRL_PIN(66, "SPI1_CS1_B"),
 592         PINCTRL_PIN(67, "MMC1_D4_SD_WE"),
 593         PINCTRL_PIN(68, "MMC1_D7"),
 594         PINCTRL_PIN(69, "MMC1_RCLK"),
 595
 596         PINCTRL_PIN(75, "USB_OC1_B"),
 597         PINCTRL_PIN(76, "PMU_RESETBUTTON_B"),
 598         PINCTRL_PIN(77, "GPIO_ALERT"),
 599         PINCTRL_PIN(78, "SDMMC3_PWR_EN_B"),
 600         PINCTRL_PIN(79, "ILB_SERIRQ"),
 601         PINCTRL_PIN(80, "USB_OC0_B"),
 602         PINCTRL_PIN(81, "SDMMC3_CD_B"),
 603         PINCTRL_PIN(82, "SPKR"),
 604         PINCTRL_PIN(83, "SUSPWRDNACK"),
 605         PINCTRL_PIN(84, "SPARE_PIN"),
 606         PINCTRL_PIN(85, "SDMMC3_1P8_EN"),
 607 };
 608
 609 static const unsigned southeast_pwm0_pins[] = { 5 };
 610 static const unsigned southeast_pwm1_pins[] = { 1 };
 611 static const unsigned southeast_sdmmc1_pins[] = {
 612         16, 17, 20, 23, 24, 26, 63, 65, 67, 68, 69,
 613 };
 614 static const unsigned southeast_sdmmc2_pins[] = { 15, 18, 19, 21, 22, 25 };
 615 static const unsigned southeast_sdmmc3_pins[] = {
 616         30, 31, 32, 33, 34, 35, 78, 81, 85,
 617 };
 618 static const unsigned southeast_spi1_pins[] = { 60, 61, 62, 64, 66 };
 619 static const unsigned southeast_spi2_pins[] = { 2, 3, 4, 6, 7 };
 620
 621 static const struct chv_pingroup southeast_groups[] = {
 622         PIN_GROUP("pwm0_grp", southeast_pwm0_pins, 1, false),
 623         PIN_GROUP("pwm1_grp", southeast_pwm1_pins, 1, false),
 624         PIN_GROUP("sdmmc1_grp", southeast_sdmmc1_pins, 1, false),
 625         PIN_GROUP("sdmmc2_grp", southeast_sdmmc2_pins, 1, false),
 626         PIN_GROUP("sdmmc3_grp", southeast_sdmmc3_pins, 1, false),
 627         PIN_GROUP("spi1_grp", southeast_spi1_pins, 1, false),
 628         PIN_GROUP("spi2_grp", southeast_spi2_pins, 4, false),
 629 };
 630
 631 static const char * const southeast_pwm0_groups[] = { "pwm0_grp" };
 632 static const char * const southeast_pwm1_groups[] = { "pwm1_grp" };
 633 static const char * const southeast_sdmmc1_groups[] = { "sdmmc1_grp" };
 634 static const char * const southeast_sdmmc2_groups[] = { "sdmmc2_grp" };
 635 static const char * const southeast_sdmmc3_groups[] = { "sdmmc3_grp" };
 636 static const char * const southeast_spi1_groups[] = { "spi1_grp" };
 637 static const char * const southeast_spi2_groups[] = { "spi2_grp" };
 638
 639 static const struct chv_function southeast_functions[] = {
 640         FUNCTION("pwm0", southeast_pwm0_groups),
 641         FUNCTION("pwm1", southeast_pwm1_groups),
 642         FUNCTION("sdmmc1", southeast_sdmmc1_groups),
 643         FUNCTION("sdmmc2", southeast_sdmmc2_groups),
 644         FUNCTION("sdmmc3", southeast_sdmmc3_groups),
 645         FUNCTION("spi1", southeast_spi1_groups),
 646         FUNCTION("spi2", southeast_spi2_groups),
 647 };
 648
 649 static const struct chv_gpio_pinrange southeast_gpio_ranges[] = {
 650         GPIO_PINRANGE(0, 7),
 651         GPIO_PINRANGE(15, 26),
 652         GPIO_PINRANGE(30, 35),
 653         GPIO_PINRANGE(45, 52),
 654         GPIO_PINRANGE(60, 69),
 655         GPIO_PINRANGE(75, 85),
 656 };
 657
 658 static const struct chv_community southeast_community = {
 659         .uid = "4",
 660         .pins = southeast_pins,
 661         .npins = ARRAY_SIZE(southeast_pins),
 662         .groups = southeast_groups,
 663         .ngroups = ARRAY_SIZE(southeast_groups),
 664         .functions = southeast_functions,
 665         .nfunctions = ARRAY_SIZE(southeast_functions),
 666         .gpio_ranges = southeast_gpio_ranges,
 667         .ngpio_ranges = ARRAY_SIZE(southeast_gpio_ranges),
 668         .ngpios = ARRAY_SIZE(southeast_pins),
 669         .nirqs = 16,
 670         .acpi_space_id = 0x94,
 671 };
 672
 673 static const struct chv_community *chv_communities[] = {
 674         &southwest_community,
 675         &north_community,
 676         &east_community,
 677         &southeast_community,
 678 };
 679
 680 /*
 681  * Lock to serialize register accesses
 682  *
 683  * Due to a silicon issue, a shared lock must be used to prevent
 684  * concurrent accesses across the 4 GPIO controllers.
 685  *
 686  * See Intel Atom Z8000 Processor Series Specification Update (Rev. 005),
 687  * errata #CHT34, for further information.
 688  */
 689 static DEFINE_RAW_SPINLOCK(chv_lock);
 690
 691 static void __iomem *chv_padreg(struct chv_pinctrl *pctrl, unsigned offset,
 692                                 unsigned reg)
 693 {
 694         unsigned family_no = offset / MAX_FAMILY_PAD_GPIO_NO;
 695         unsigned pad_no = offset % MAX_FAMILY_PAD_GPIO_NO;
 696
 697         offset = FAMILY_PAD_REGS_OFF + FAMILY_PAD_REGS_SIZE * family_no +
 698                  GPIO_REGS_SIZE * pad_no;
 699
 700         return pctrl->regs + offset + reg;
 701 }
 702
 703 static void chv_writel(u32 value, void __iomem *reg)
 704 {
 705         writel(value, reg);
 706         /* simple readback to confirm the bus transferring done */
 707         readl(reg);
 708 }
 709
 710 /* When Pad Cfg is locked, driver can only change GPIOTXState or GPIORXState */
 711 static bool chv_pad_locked(struct chv_pinctrl *pctrl, unsigned offset)
 712 {
 713         void __iomem *reg;
 714
 715         reg = chv_padreg(pctrl, offset, CHV_PADCTRL1);
 716         return readl(reg) & CHV_PADCTRL1_CFGLOCK;
 717 }
 718
 719 static int chv_get_groups_count(struct pinctrl_dev *pctldev)
 720 {
 721         struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
 722
 723         return pctrl->community->ngroups;
 724 }
 725
 726 static const char *chv_get_group_name(struct pinctrl_dev *pctldev,
 727                                       unsigned group)
 728 {
 729         struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
 730
 731         return pctrl->community->groups[group].name;
 732 }
 733
 734 static int chv_get_group_pins(struct pinctrl_dev *pctldev, unsigned group,
 735                               const unsigned **pins, unsigned *npins)
 736 {
 737         struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
 738
 739         *pins = pctrl->community->groups[group].pins;
 740         *npins = pctrl->community->groups[group].npins;
 741         return 0;
 742 }
 743
 744 static void chv_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s,
 745                              unsigned offset)
 746 {
 747         struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
 748         unsigned long flags;
 749         u32 ctrl0, ctrl1;
 750         bool locked;
 751
 752         raw_spin_lock_irqsave(&chv_lock, flags);
 753
 754         ctrl0 = readl(chv_padreg(pctrl, offset, CHV_PADCTRL0));
 755         ctrl1 = readl(chv_padreg(pctrl, offset, CHV_PADCTRL1));
 756         locked = chv_pad_locked(pctrl, offset);
 757
 758         raw_spin_unlock_irqrestore(&chv_lock, flags);
 759
 760         if (ctrl0 & CHV_PADCTRL0_GPIOEN) {
 761                 seq_puts(s, "GPIO ");
 762         } else {
 763                 u32 mode;
 764
 765                 mode = ctrl0 & CHV_PADCTRL0_PMODE_MASK;
 766                 mode >>= CHV_PADCTRL0_PMODE_SHIFT;
 767
 768                 seq_printf(s, "mode %d ", mode);
 769         }
 770
 771         seq_printf(s, "0x%08x 0x%08x", ctrl0, ctrl1);
 772
 773         if (locked)
 774                 seq_puts(s, " [LOCKED]");
 775 }
 776
 777 static const struct pinctrl_ops chv_pinctrl_ops = {
 778         .get_groups_count = chv_get_groups_count,
 779         .get_group_name = chv_get_group_name,
 780         .get_group_pins = chv_get_group_pins,
 781         .pin_dbg_show = chv_pin_dbg_show,
 782 };
 783
 784 static int chv_get_functions_count(struct pinctrl_dev *pctldev)
 785 {
 786         struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
 787
 788         return pctrl->community->nfunctions;
 789 }
 790
 791 static const char *chv_get_function_name(struct pinctrl_dev *pctldev,
 792                                          unsigned function)
 793 {
 794         struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
 795
 796         return pctrl->community->functions[function].name;
 797 }
 798
 799 static int chv_get_function_groups(struct pinctrl_dev *pctldev,
 800                                    unsigned function,
 801                                    const char * const **groups,
 802                                    unsigned * const ngroups)
 803 {
 804         struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
 805
 806         *groups = pctrl->community->functions[function].groups;
 807         *ngroups = pctrl->community->functions[function].ngroups;
 808         return 0;
 809 }
 810
 811 static int chv_pinmux_set_mux(struct pinctrl_dev *pctldev, unsigned function,
 812                               unsigned group)
 813 {
 814         struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
 815         const struct chv_pingroup *grp;
 816         unsigned long flags;
 817         int i;
 818
 819         grp = &pctrl->community->groups[group];
 820
 821         raw_spin_lock_irqsave(&chv_lock, flags);
 822
 823         /* Check first that the pad is not locked */
 824         for (i = 0; i < grp->npins; i++) {
 825                 if (chv_pad_locked(pctrl, grp->pins[i])) {
 826                         dev_warn(pctrl->dev, "unable to set mode for locked pin %u\n",
 827                                  grp->pins[i]);
 828                         raw_spin_unlock_irqrestore(&chv_lock, flags);
 829                         return -EBUSY;
 830                 }
 831         }
 832
 833         for (i = 0; i < grp->npins; i++) {
 834                 const struct chv_alternate_function *altfunc = &grp->altfunc;
 835                 int pin = grp->pins[i];
 836                 void __iomem *reg;
 837                 u32 value;
 838
 839                 /* Check if there is pin-specific config */
 840                 if (grp->overrides) {
 841                         int j;
 842
 843                         for (j = 0; j < grp->noverrides; j++) {
 844                                 if (grp->overrides[j].pin == pin) {
 845                                         altfunc = &grp->overrides[j];
 846                                         break;
 847                                 }
 848                         }
 849                 }
 850
 851                 reg = chv_padreg(pctrl, pin, CHV_PADCTRL0);
 852                 value = readl(reg);
 853                 /* Disable GPIO mode */
 854                 value &= ~CHV_PADCTRL0_GPIOEN;
 855                 /* Set to desired mode */
 856                 value &= ~CHV_PADCTRL0_PMODE_MASK;
 857                 value |= altfunc->mode << CHV_PADCTRL0_PMODE_SHIFT;
 858                 chv_writel(value, reg);
 859
 860                 /* Update for invert_oe */
 861                 reg = chv_padreg(pctrl, pin, CHV_PADCTRL1);
 862                 value = readl(reg) & ~CHV_PADCTRL1_INVRXTX_MASK;
 863                 if (altfunc->invert_oe)
 864                         value |= CHV_PADCTRL1_INVRXTX_TXENABLE;
 865                 chv_writel(value, reg);
 866
 867                 dev_dbg(pctrl->dev, "configured pin %u mode %u OE %sinverted\n",
 868                         pin, altfunc->mode, altfunc->invert_oe ? "" : "not ");
 869         }
 870
 871         raw_spin_unlock_irqrestore(&chv_lock, flags);
 872
 873         return 0;
 874 }
 875
 876 static int chv_gpio_request_enable(struct pinctrl_dev *pctldev,
 877                                    struct pinctrl_gpio_range *range,
 878                                    unsigned offset)
 879 {
 880         struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
 881         unsigned long flags;
 882         void __iomem *reg;
 883         u32 value;
 884
 885         raw_spin_lock_irqsave(&chv_lock, flags);
 886
 887         if (chv_pad_locked(pctrl, offset)) {
 888                 value = readl(chv_padreg(pctrl, offset, CHV_PADCTRL0));
 889                 if (!(value & CHV_PADCTRL0_GPIOEN)) {
 890                         /* Locked so cannot enable */
 891                         raw_spin_unlock_irqrestore(&chv_lock, flags);
 892                         return -EBUSY;
 893                 }
 894         } else {
 895                 int i;
 896
 897                 /* Reset the interrupt mapping */
 898                 for (i = 0; i < ARRAY_SIZE(pctrl->intr_lines); i++) {
 899                         if (pctrl->intr_lines[i] == offset) {
 900                                 pctrl->intr_lines[i] = 0;
 901                                 break;
 902                         }
 903                 }
 904
 905                 /* Disable interrupt generation */
 906                 reg = chv_padreg(pctrl, offset, CHV_PADCTRL1);
 907                 value = readl(reg);
 908                 value &= ~CHV_PADCTRL1_INTWAKECFG_MASK;
 909                 value &= ~CHV_PADCTRL1_INVRXTX_MASK;
 910                 chv_writel(value, reg);
 911
 912                 reg = chv_padreg(pctrl, offset, CHV_PADCTRL0);
 913                 value = readl(reg);
 914
 915                 /*
 916                  * If the pin is in HiZ mode (both TX and RX buffers are
 917                  * disabled) we turn it to be input now.
 918                  */
 919                 if ((value & CHV_PADCTRL0_GPIOCFG_MASK) ==
 920                      (CHV_PADCTRL0_GPIOCFG_HIZ << CHV_PADCTRL0_GPIOCFG_SHIFT)) {
 921                         value &= ~CHV_PADCTRL0_GPIOCFG_MASK;
 922                         value |= CHV_PADCTRL0_GPIOCFG_GPI <<
 923                                 CHV_PADCTRL0_GPIOCFG_SHIFT;
 924                 }
 925
 926                 /* Switch to a GPIO mode */
 927                 value |= CHV_PADCTRL0_GPIOEN;
 928                 chv_writel(value, reg);
 929         }
 930
 931         raw_spin_unlock_irqrestore(&chv_lock, flags);
 932
 933         return 0;
 934 }
 935
 936 static void chv_gpio_disable_free(struct pinctrl_dev *pctldev,
 937                                   struct pinctrl_gpio_range *range,
 938                                   unsigned offset)
 939 {
 940         struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
 941         unsigned long flags;
 942         void __iomem *reg;
 943         u32 value;
 944
 945         raw_spin_lock_irqsave(&chv_lock, flags);
 946
 947         reg = chv_padreg(pctrl, offset, CHV_PADCTRL0);
 948         value = readl(reg) & ~CHV_PADCTRL0_GPIOEN;
 949         chv_writel(value, reg);
 950
 951         raw_spin_unlock_irqrestore(&chv_lock, flags);
 952 }
 953
 954 static int chv_gpio_set_direction(struct pinctrl_dev *pctldev,
 955                                   struct pinctrl_gpio_range *range,
 956                                   unsigned offset, bool input)
 957 {
 958         struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
 959         void __iomem *reg = chv_padreg(pctrl, offset, CHV_PADCTRL0);
 960         unsigned long flags;
 961         u32 ctrl0;
 962
 963         raw_spin_lock_irqsave(&chv_lock, flags);
 964
 965         ctrl0 = readl(reg) & ~CHV_PADCTRL0_GPIOCFG_MASK;
 966         if (input)
 967                 ctrl0 |= CHV_PADCTRL0_GPIOCFG_GPI << CHV_PADCTRL0_GPIOCFG_SHIFT;
 968         else
 969                 ctrl0 |= CHV_PADCTRL0_GPIOCFG_GPO << CHV_PADCTRL0_GPIOCFG_SHIFT;
 970         chv_writel(ctrl0, reg);
 971
 972         raw_spin_unlock_irqrestore(&chv_lock, flags);
 973
 974         return 0;
 975 }
 976
 977 static const struct pinmux_ops chv_pinmux_ops = {
 978         .get_functions_count = chv_get_functions_count,
 979         .get_function_name = chv_get_function_name,
 980         .get_function_groups = chv_get_function_groups,
 981         .set_mux = chv_pinmux_set_mux,
 982         .gpio_request_enable = chv_gpio_request_enable,
 983         .gpio_disable_free = chv_gpio_disable_free,
 984         .gpio_set_direction = chv_gpio_set_direction,
 985 };
 986
 987 static int chv_config_get(struct pinctrl_dev *pctldev, unsigned pin,
 988                           unsigned long *config)
 989 {
 990         struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
 991         enum pin_config_param param = pinconf_to_config_param(*config);
 992         unsigned long flags;
 993         u32 ctrl0, ctrl1;
 994         u16 arg = 0;
 995         u32 term;
 996
 997         raw_spin_lock_irqsave(&chv_lock, flags);
 998         ctrl0 = readl(chv_padreg(pctrl, pin, CHV_PADCTRL0));
 999         ctrl1 = readl(chv_padreg(pctrl, pin, CHV_PADCTRL1));
1000         raw_spin_unlock_irqrestore(&chv_lock, flags);
1001
1002         term = (ctrl0 & CHV_PADCTRL0_TERM_MASK) >> CHV_PADCTRL0_TERM_SHIFT;
1003
1004         switch (param) {
1005         case PIN_CONFIG_BIAS_DISABLE:
1006                 if (term)
1007                         return -EINVAL;
1008                 break;
1009
1010         case PIN_CONFIG_BIAS_PULL_UP:
1011                 if (!(ctrl0 & CHV_PADCTRL0_TERM_UP))
1012                         return -EINVAL;
1013
1014                 switch (term) {
1015                 case CHV_PADCTRL0_TERM_20K:
1016                         arg = 20000;
1017                         break;
1018                 case CHV_PADCTRL0_TERM_5K:
1019                         arg = 5000;
1020                         break;
1021                 case CHV_PADCTRL0_TERM_1K:
1022                         arg = 1000;
1023                         break;
1024                 }
1025
1026                 break;
1027
1028         case PIN_CONFIG_BIAS_PULL_DOWN:
1029                 if (!term || (ctrl0 & CHV_PADCTRL0_TERM_UP))
1030                         return -EINVAL;
1031
1032                 switch (term) {
1033                 case CHV_PADCTRL0_TERM_20K:
1034                         arg = 20000;
1035                         break;
1036                 case CHV_PADCTRL0_TERM_5K:
1037                         arg = 5000;
1038                         break;
1039                 }
1040
1041                 break;
1042
1043         case PIN_CONFIG_DRIVE_OPEN_DRAIN:
1044                 if (!(ctrl1 & CHV_PADCTRL1_ODEN))
1045                         return -EINVAL;
1046                 break;
1047
1048         case PIN_CONFIG_BIAS_HIGH_IMPEDANCE: {
1049                 u32 cfg;
1050
1051                 cfg = ctrl0 & CHV_PADCTRL0_GPIOCFG_MASK;
1052                 cfg >>= CHV_PADCTRL0_GPIOCFG_SHIFT;
1053                 if (cfg != CHV_PADCTRL0_GPIOCFG_HIZ)
1054                         return -EINVAL;
1055
1056                 break;
1057         }
1058
1059         default:
1060                 return -ENOTSUPP;
1061         }
1062
1063         *config = pinconf_to_config_packed(param, arg);
1064         return 0;
1065 }
1066
1067 static int chv_config_set_pull(struct chv_pinctrl *pctrl, unsigned pin,
1068                                enum pin_config_param param, u32 arg)
1069 {
1070         void __iomem *reg = chv_padreg(pctrl, pin, CHV_PADCTRL0);
1071         unsigned long flags;
1072         u32 ctrl0, pull;
1073
1074         raw_spin_lock_irqsave(&chv_lock, flags);
1075         ctrl0 = readl(reg);
1076
1077         switch (param) {
1078         case PIN_CONFIG_BIAS_DISABLE:
1079                 ctrl0 &= ~(CHV_PADCTRL0_TERM_MASK | CHV_PADCTRL0_TERM_UP);
1080                 break;
1081
1082         case PIN_CONFIG_BIAS_PULL_UP:
1083                 ctrl0 &= ~(CHV_PADCTRL0_TERM_MASK | CHV_PADCTRL0_TERM_UP);
1084
1085                 switch (arg) {
1086                 case 1000:
1087                         /* For 1k there is only pull up */
1088                         pull = CHV_PADCTRL0_TERM_1K << CHV_PADCTRL0_TERM_SHIFT;
1089                         break;
1090                 case 5000:
1091                         pull = CHV_PADCTRL0_TERM_5K << CHV_PADCTRL0_TERM_SHIFT;
1092                         break;
1093                 case 20000:
1094                         pull = CHV_PADCTRL0_TERM_20K << CHV_PADCTRL0_TERM_SHIFT;
1095                         break;
1096                 default:
1097                         raw_spin_unlock_irqrestore(&chv_lock, flags);
1098                         return -EINVAL;
1099                 }
1100
1101                 ctrl0 |= CHV_PADCTRL0_TERM_UP | pull;
1102                 break;
1103
1104         case PIN_CONFIG_BIAS_PULL_DOWN:
1105                 ctrl0 &= ~(CHV_PADCTRL0_TERM_MASK | CHV_PADCTRL0_TERM_UP);
1106
1107                 switch (arg) {
1108                 case 5000:
1109                         pull = CHV_PADCTRL0_TERM_5K << CHV_PADCTRL0_TERM_SHIFT;
1110                         break;
1111                 case 20000:
1112                         pull = CHV_PADCTRL0_TERM_20K << CHV_PADCTRL0_TERM_SHIFT;
1113                         break;
1114                 default:
1115                         raw_spin_unlock_irqrestore(&chv_lock, flags);
1116                         return -EINVAL;
1117                 }
1118
1119                 ctrl0 |= pull;
1120                 break;
1121
1122         default:
1123                 raw_spin_unlock_irqrestore(&chv_lock, flags);
1124                 return -EINVAL;
1125         }
1126
1127         chv_writel(ctrl0, reg);
1128         raw_spin_unlock_irqrestore(&chv_lock, flags);
1129
1130         return 0;
1131 }
1132
1133 static int chv_config_set_oden(struct chv_pinctrl *pctrl, unsigned int pin,
1134                                bool enable)
1135 {
1136         void __iomem *reg = chv_padreg(pctrl, pin, CHV_PADCTRL1);
1137         unsigned long flags;
1138         u32 ctrl1;
1139
1140         raw_spin_lock_irqsave(&chv_lock, flags);
1141         ctrl1 = readl(reg);
1142
1143         if (enable)
1144                 ctrl1 |= CHV_PADCTRL1_ODEN;
1145         else
1146                 ctrl1 &= ~CHV_PADCTRL1_ODEN;
1147
1148         chv_writel(ctrl1, reg);
1149         raw_spin_unlock_irqrestore(&chv_lock, flags);
1150
1151         return 0;
1152 }
1153
1154 static int chv_config_set(struct pinctrl_dev *pctldev, unsigned pin,
1155                           unsigned long *configs, unsigned nconfigs)
1156 {
1157         struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
1158         enum pin_config_param param;
1159         int i, ret;
1160         u32 arg;
1161
1162         if (chv_pad_locked(pctrl, pin))
1163                 return -EBUSY;
1164
1165         for (i = 0; i < nconfigs; i++) {
1166                 param = pinconf_to_config_param(configs[i]);
1167                 arg = pinconf_to_config_argument(configs[i]);
1168
1169                 switch (param) {
1170                 case PIN_CONFIG_BIAS_DISABLE:
1171                 case PIN_CONFIG_BIAS_PULL_UP:
1172                 case PIN_CONFIG_BIAS_PULL_DOWN:
1173                         ret = chv_config_set_pull(pctrl, pin, param, arg);
1174                         if (ret)
1175                                 return ret;
1176                         break;
1177
1178                 case PIN_CONFIG_DRIVE_PUSH_PULL:
1179                         ret = chv_config_set_oden(pctrl, pin, false);
1180                         if (ret)
1181                                 return ret;
1182                         break;
1183
1184                 case PIN_CONFIG_DRIVE_OPEN_DRAIN:
1185                         ret = chv_config_set_oden(pctrl, pin, true);
1186                         if (ret)
1187                                 return ret;
1188                         break;
1189
1190                 default:
1191                         return -ENOTSUPP;
1192                 }
1193
1194                 dev_dbg(pctrl->dev, "pin %d set config %d arg %u\n", pin,
1195                         param, arg);
1196         }
1197
1198         return 0;
1199 }
1200
1201 static int chv_config_group_get(struct pinctrl_dev *pctldev,
1202                                 unsigned int group,
1203                                 unsigned long *config)
1204 {
1205         const unsigned int *pins;
1206         unsigned int npins;
1207         int ret;
1208
1209         ret = chv_get_group_pins(pctldev, group, &pins, &npins);
1210         if (ret)
1211                 return ret;
1212
1213         ret = chv_config_get(pctldev, pins[0], config);
1214         if (ret)
1215                 return ret;
1216
1217         return 0;
1218 }
1219
1220 static int chv_config_group_set(struct pinctrl_dev *pctldev,
1221                                 unsigned int group, unsigned long *configs,
1222                                 unsigned int num_configs)
1223 {
1224         const unsigned int *pins;
1225         unsigned int npins;
1226         int i, ret;
1227
1228         ret = chv_get_group_pins(pctldev, group, &pins, &npins);
1229         if (ret)
1230                 return ret;
1231
1232         for (i = 0; i < npins; i++) {
1233                 ret = chv_config_set(pctldev, pins[i], configs, num_configs);
1234                 if (ret)
1235                         return ret;
1236         }
1237
1238         return 0;
1239 }
1240
1241 static const struct pinconf_ops chv_pinconf_ops = {
1242         .is_generic = true,
1243         .pin_config_set = chv_config_set,
1244         .pin_config_get = chv_config_get,
1245         .pin_config_group_get = chv_config_group_get,
1246         .pin_config_group_set = chv_config_group_set,
1247 };
1248
1249 static struct pinctrl_desc chv_pinctrl_desc = {
1250         .pctlops = &chv_pinctrl_ops,
1251         .pmxops = &chv_pinmux_ops,
1252         .confops = &chv_pinconf_ops,
1253         .owner = THIS_MODULE,
1254 };
1255
1256 static unsigned chv_gpio_offset_to_pin(struct chv_pinctrl *pctrl,
1257                                        unsigned offset)
1258 {
1259         return pctrl->community->pins[offset].number;
1260 }
1261
1262 static int chv_gpio_get(struct gpio_chip *chip, unsigned offset)
1263 {
1264         struct chv_pinctrl *pctrl = gpiochip_get_data(chip);
1265         int pin = chv_gpio_offset_to_pin(pctrl, offset);
1266         unsigned long flags;
1267         u32 ctrl0, cfg;
1268
1269         raw_spin_lock_irqsave(&chv_lock, flags);
1270         ctrl0 = readl(chv_padreg(pctrl, pin, CHV_PADCTRL0));
1271         raw_spin_unlock_irqrestore(&chv_lock, flags);
1272
1273         cfg = ctrl0 & CHV_PADCTRL0_GPIOCFG_MASK;
1274         cfg >>= CHV_PADCTRL0_GPIOCFG_SHIFT;
1275
1276         if (cfg == CHV_PADCTRL0_GPIOCFG_GPO)
1277                 return !!(ctrl0 & CHV_PADCTRL0_GPIOTXSTATE);
1278         return !!(ctrl0 & CHV_PADCTRL0_GPIORXSTATE);
1279 }
1280
1281 static void chv_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
1282 {
1283         struct chv_pinctrl *pctrl = gpiochip_get_data(chip);
1284         unsigned pin = chv_gpio_offset_to_pin(pctrl, offset);
1285         unsigned long flags;
1286         void __iomem *reg;
1287         u32 ctrl0;
1288
1289         raw_spin_lock_irqsave(&chv_lock, flags);
1290
1291         reg = chv_padreg(pctrl, pin, CHV_PADCTRL0);
1292         ctrl0 = readl(reg);
1293
1294         if (value)
1295                 ctrl0 |= CHV_PADCTRL0_GPIOTXSTATE;
1296         else
1297                 ctrl0 &= ~CHV_PADCTRL0_GPIOTXSTATE;
1298
1299         chv_writel(ctrl0, reg);
1300
1301         raw_spin_unlock_irqrestore(&chv_lock, flags);
1302 }
1303
1304 static int chv_gpio_get_direction(struct gpio_chip *chip, unsigned offset)
1305 {
1306         struct chv_pinctrl *pctrl = gpiochip_get_data(chip);
1307         unsigned pin = chv_gpio_offset_to_pin(pctrl, offset);
1308         u32 ctrl0, direction;
1309         unsigned long flags;
1310
1311         raw_spin_lock_irqsave(&chv_lock, flags);
1312         ctrl0 = readl(chv_padreg(pctrl, pin, CHV_PADCTRL0));
1313         raw_spin_unlock_irqrestore(&chv_lock, flags);
1314
1315         direction = ctrl0 & CHV_PADCTRL0_GPIOCFG_MASK;
1316         direction >>= CHV_PADCTRL0_GPIOCFG_SHIFT;
1317
1318         return direction != CHV_PADCTRL0_GPIOCFG_GPO;
1319 }
1320
1321 static int chv_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
1322 {
1323         return pinctrl_gpio_direction_input(chip->base + offset);
1324 }
1325
1326 static int chv_gpio_direction_output(struct gpio_chip *chip, unsigned offset,
1327                                      int value)
1328 {
1329         chv_gpio_set(chip, offset, value);
1330         return pinctrl_gpio_direction_output(chip->base + offset);
1331 }
1332
1333 static const struct gpio_chip chv_gpio_chip = {
1334         .owner = THIS_MODULE,
1335         .request = gpiochip_generic_request,
1336         .free = gpiochip_generic_free,
1337         .get_direction = chv_gpio_get_direction,
1338         .direction_input = chv_gpio_direction_input,
1339         .direction_output = chv_gpio_direction_output,
1340         .get = chv_gpio_get,
1341         .set = chv_gpio_set,
1342 };
1343
1344 static void chv_gpio_irq_ack(struct irq_data *d)
1345 {
1346         struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
1347         struct chv_pinctrl *pctrl = gpiochip_get_data(gc);
1348         int pin = chv_gpio_offset_to_pin(pctrl, irqd_to_hwirq(d));
1349         u32 intr_line;
1350
1351         raw_spin_lock(&chv_lock);
1352
1353         intr_line = readl(chv_padreg(pctrl, pin, CHV_PADCTRL0));
1354         intr_line &= CHV_PADCTRL0_INTSEL_MASK;
1355         intr_line >>= CHV_PADCTRL0_INTSEL_SHIFT;
1356         chv_writel(BIT(intr_line), pctrl->regs + CHV_INTSTAT);
1357
1358         raw_spin_unlock(&chv_lock);
1359 }
1360
1361 static void chv_gpio_irq_mask_unmask(struct irq_data *d, bool mask)
1362 {
1363         struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
1364         struct chv_pinctrl *pctrl = gpiochip_get_data(gc);
1365         int pin = chv_gpio_offset_to_pin(pctrl, irqd_to_hwirq(d));
1366         u32 value, intr_line;
1367         unsigned long flags;
1368
1369         raw_spin_lock_irqsave(&chv_lock, flags);
1370
1371         intr_line = readl(chv_padreg(pctrl, pin, CHV_PADCTRL0));
1372         intr_line &= CHV_PADCTRL0_INTSEL_MASK;
1373         intr_line >>= CHV_PADCTRL0_INTSEL_SHIFT;
1374
1375         value = readl(pctrl->regs + CHV_INTMASK);
1376         if (mask)
1377                 value &= ~BIT(intr_line);
1378         else
1379                 value |= BIT(intr_line);
1380         chv_writel(value, pctrl->regs + CHV_INTMASK);
1381
1382         raw_spin_unlock_irqrestore(&chv_lock, flags);
1383 }
1384
1385 static void chv_gpio_irq_mask(struct irq_data *d)
1386 {
1387         chv_gpio_irq_mask_unmask(d, true);
1388 }
1389
1390 static void chv_gpio_irq_unmask(struct irq_data *d)
1391 {
1392         chv_gpio_irq_mask_unmask(d, false);
1393 }
1394
1395 static unsigned chv_gpio_irq_startup(struct irq_data *d)
1396 {
1397         /*
1398          * Check if the interrupt has been requested with 0 as triggering
1399          * type. In that case it is assumed that the current values
1400          * programmed to the hardware are used (e.g BIOS configured
1401          * defaults).
1402          *
1403          * In that case ->irq_set_type() will never be called so we need to
1404          * read back the values from hardware now, set correct flow handler
1405          * and update mappings before the interrupt is being used.
1406          */
1407         if (irqd_get_trigger_type(d) == IRQ_TYPE_NONE) {
1408                 struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
1409                 struct chv_pinctrl *pctrl = gpiochip_get_data(gc);
1410                 unsigned offset = irqd_to_hwirq(d);
1411                 int pin = chv_gpio_offset_to_pin(pctrl, offset);
1412                 irq_flow_handler_t handler;
1413                 unsigned long flags;
1414                 u32 intsel, value;
1415
1416                 raw_spin_lock_irqsave(&chv_lock, flags);
1417                 intsel = readl(chv_padreg(pctrl, pin, CHV_PADCTRL0));
1418                 intsel &= CHV_PADCTRL0_INTSEL_MASK;
1419                 intsel >>= CHV_PADCTRL0_INTSEL_SHIFT;
1420
1421                 value = readl(chv_padreg(pctrl, pin, CHV_PADCTRL1));
1422                 if (value & CHV_PADCTRL1_INTWAKECFG_LEVEL)
1423                         handler = handle_level_irq;
1424                 else
1425                         handler = handle_edge_irq;
1426
1427                 if (!pctrl->intr_lines[intsel]) {
1428                         irq_set_handler_locked(d, handler);
1429                         pctrl->intr_lines[intsel] = offset;
1430                 }
1431                 raw_spin_unlock_irqrestore(&chv_lock, flags);
1432         }
1433
1434         chv_gpio_irq_unmask(d);
1435         return 0;
1436 }
1437
1438 static int chv_gpio_irq_type(struct irq_data *d, unsigned type)
1439 {
1440         struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
1441         struct chv_pinctrl *pctrl = gpiochip_get_data(gc);
1442         unsigned offset = irqd_to_hwirq(d);
1443         int pin = chv_gpio_offset_to_pin(pctrl, offset);
1444         unsigned long flags;
1445         u32 value;
1446
1447         raw_spin_lock_irqsave(&chv_lock, flags);
1448
1449         /*
1450          * Pins which can be used as shared interrupt are configured in
1451          * BIOS. Driver trusts BIOS configurations and assigns different
1452          * handler according to the irq type.
1453          *
1454          * Driver needs to save the mapping between each pin and
1455          * its interrupt line.
1456          * 1. If the pin cfg is locked in BIOS:
1457          *      Trust BIOS has programmed IntWakeCfg bits correctly,
1458          *      driver just needs to save the mapping.
1459          * 2. If the pin cfg is not locked in BIOS:
1460          *      Driver programs the IntWakeCfg bits and save the mapping.
1461          */
1462         if (!chv_pad_locked(pctrl, pin)) {
1463                 void __iomem *reg = chv_padreg(pctrl, pin, CHV_PADCTRL1);
1464
1465                 value = readl(reg);
1466                 value &= ~CHV_PADCTRL1_INTWAKECFG_MASK;
1467                 value &= ~CHV_PADCTRL1_INVRXTX_MASK;
1468
1469                 if (type & IRQ_TYPE_EDGE_BOTH) {
1470                         if ((type & IRQ_TYPE_EDGE_BOTH) == IRQ_TYPE_EDGE_BOTH)
1471                                 value |= CHV_PADCTRL1_INTWAKECFG_BOTH;
1472                         else if (type & IRQ_TYPE_EDGE_RISING)
1473                                 value |= CHV_PADCTRL1_INTWAKECFG_RISING;
1474                         else if (type & IRQ_TYPE_EDGE_FALLING)
1475                                 value |= CHV_PADCTRL1_INTWAKECFG_FALLING;
1476                 } else if (type & IRQ_TYPE_LEVEL_MASK) {
1477                         value |= CHV_PADCTRL1_INTWAKECFG_LEVEL;
1478                         if (type & IRQ_TYPE_LEVEL_LOW)
1479                                 value |= CHV_PADCTRL1_INVRXTX_RXDATA;
1480                 }
1481
1482                 chv_writel(value, reg);
1483         }
1484
1485         value = readl(chv_padreg(pctrl, pin, CHV_PADCTRL0));
1486         value &= CHV_PADCTRL0_INTSEL_MASK;
1487         value >>= CHV_PADCTRL0_INTSEL_SHIFT;
1488
1489         pctrl->intr_lines[value] = offset;
1490
1491         if (type & IRQ_TYPE_EDGE_BOTH)
1492                 irq_set_handler_locked(d, handle_edge_irq);
1493         else if (type & IRQ_TYPE_LEVEL_MASK)
1494                 irq_set_handler_locked(d, handle_level_irq);
1495
1496         raw_spin_unlock_irqrestore(&chv_lock, flags);
1497
1498         return 0;
1499 }
1500
1501 static struct irq_chip chv_gpio_irqchip = {
1502         .name = "chv-gpio",
1503         .irq_startup = chv_gpio_irq_startup,
1504         .irq_ack = chv_gpio_irq_ack,
1505         .irq_mask = chv_gpio_irq_mask,
1506         .irq_unmask = chv_gpio_irq_unmask,
1507         .irq_set_type = chv_gpio_irq_type,
1508         .flags = IRQCHIP_SKIP_SET_WAKE,
1509 };
1510
1511 static void chv_gpio_irq_handler(struct irq_desc *desc)
1512 {
1513         struct gpio_chip *gc = irq_desc_get_handler_data(desc);
1514         struct chv_pinctrl *pctrl = gpiochip_get_data(gc);
1515         struct irq_chip *chip = irq_desc_get_chip(desc);
1516         unsigned long pending;
1517         u32 intr_line;
1518
1519         chained_irq_enter(chip, desc);
1520
1521         pending = readl(pctrl->regs + CHV_INTSTAT);
1522         for_each_set_bit(intr_line, &pending, pctrl->community->nirqs) {
1523                 unsigned irq, offset;
1524
1525                 offset = pctrl->intr_lines[intr_line];
1526                 irq = irq_find_mapping(gc->irqdomain, offset);
1527                 generic_handle_irq(irq);
1528         }
1529
1530         chained_irq_exit(chip, desc);
1531 }
1532
1533 /*
1534  * Certain machines seem to hardcode Linux IRQ numbers in their ACPI
1535  * tables. Since we leave GPIOs that are not capable of generating
1536  * interrupts out of the irqdomain the numbering will be different and
1537  * cause devices using the hardcoded IRQ numbers fail. In order not to
1538  * break such machines we will only mask pins from irqdomain if the machine
1539  * is not listed below.
1540  */
1541 static const struct dmi_system_id chv_no_valid_mask[] = {
1542         /* See https://bugzilla.kernel.org/show_bug.cgi?id=194945 */
1543         {
1544                 .ident = "Intel_Strago based Chromebooks (All models)",
1545                 .matches = {
1546                         DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
1547                         DMI_MATCH(DMI_PRODUCT_FAMILY, "Intel_Strago"),
1548                 },
1549         },
1550         {
1551                 .ident = "HP Chromebook 11 G5 (Setzer)",
1552                 .matches = {
1553                         DMI_MATCH(DMI_SYS_VENDOR, "HP"),
1554                         DMI_MATCH(DMI_PRODUCT_NAME, "Setzer"),
1555                 },
1556         },
1557         {
1558                 .ident = "Acer Chromebook R11 (Cyan)",
1559                 .matches = {
1560                         DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
1561                         DMI_MATCH(DMI_PRODUCT_NAME, "Cyan"),
1562                 },
1563         },
1564         {
1565                 .ident = "Samsung Chromebook 3 (Celes)",
1566                 .matches = {
1567                         DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
1568                         DMI_MATCH(DMI_PRODUCT_NAME, "Celes"),
1569                 },
1570         },
1571         {}
1572 };
1573
1574 static int chv_gpio_probe(struct chv_pinctrl *pctrl, int irq)
1575 {
1576         const struct chv_gpio_pinrange *range;
1577         struct gpio_chip *chip = &pctrl->chip;
1578         bool need_valid_mask = !dmi_check_system(chv_no_valid_mask);
1579         int ret, i, offset;
1580         int irq_base;
1581
1582         *chip = chv_gpio_chip;
1583
1584         chip->ngpio = pctrl->community->ngpios;
1585         chip->label = dev_name(pctrl->dev);
1586         chip->parent = pctrl->dev;
1587         chip->base = -1;
1588         chip->irq_need_valid_mask = need_valid_mask;
1589
1590         ret = devm_gpiochip_add_data(pctrl->dev, chip, pctrl);
1591         if (ret) {
1592                 dev_err(pctrl->dev, "Failed to register gpiochip\n");
1593                 return ret;
1594         }
1595
1596         for (i = 0, offset = 0; i < pctrl->community->ngpio_ranges; i++) {
1597                 range = &pctrl->community->gpio_ranges[i];
1598                 ret = gpiochip_add_pin_range(chip, dev_name(pctrl->dev), offset,
1599                                              range->base, range->npins);
1600                 if (ret) {
1601                         dev_err(pctrl->dev, "failed to add GPIO pin range\n");
1602                         return ret;
1603                 }
1604
1605                 offset += range->npins;
1606         }
1607
1608         /* Do not add GPIOs that can only generate GPEs to the IRQ domain */
1609         for (i = 0; i < pctrl->community->npins; i++) {
1610                 const struct pinctrl_pin_desc *desc;
1611                 u32 intsel;
1612
1613                 desc = &pctrl->community->pins[i];
1614
1615                 intsel = readl(chv_padreg(pctrl, desc->number, CHV_PADCTRL0));
1616                 intsel &= CHV_PADCTRL0_INTSEL_MASK;
1617                 intsel >>= CHV_PADCTRL0_INTSEL_SHIFT;
1618
1619                 if (need_valid_mask && intsel >= pctrl->community->nirqs)
1620                         clear_bit(i, chip->irq_valid_mask);
1621         }
1622
1623         /* Clear all interrupts */
1624         chv_writel(0xffff, pctrl->regs + CHV_INTSTAT);
1625
1626         if (!need_valid_mask) {
1627                 irq_base = devm_irq_alloc_descs(pctrl->dev, -1, 0,
1628                                                 chip->ngpio, NUMA_NO_NODE);
1629                 if (irq_base < 0) {
1630                         dev_err(pctrl->dev, "Failed to allocate IRQ numbers\n");
1631                         return irq_base;
1632                 }
1633         } else {
1634                 irq_base = 0;
1635         }
1636
1637         ret = gpiochip_irqchip_add(chip, &chv_gpio_irqchip, irq_base,
1638                                    handle_bad_irq, IRQ_TYPE_NONE);
1639         if (ret) {
1640                 dev_err(pctrl->dev, "failed to add IRQ chip\n");
1641                 return ret;
1642         }
1643
1644         gpiochip_set_chained_irqchip(chip, &chv_gpio_irqchip, irq,
1645                                      chv_gpio_irq_handler);
1646         return 0;
1647 }
1648
1649 static acpi_status chv_pinctrl_mmio_access_handler(u32 function,
1650         acpi_physical_address address, u32 bits, u64 *value,
1651         void *handler_context, void *region_context)
1652 {
1653         struct chv_pinctrl *pctrl = region_context;
1654         unsigned long flags;
1655         acpi_status ret = AE_OK;
1656
1657         raw_spin_lock_irqsave(&chv_lock, flags);
1658
1659         if (function == ACPI_WRITE)
1660                 chv_writel((u32)(*value), pctrl->regs + (u32)address);
1661         else if (function == ACPI_READ)
1662                 *value = readl(pctrl->regs + (u32)address);
1663         else
1664                 ret = AE_BAD_PARAMETER;
1665
1666         raw_spin_unlock_irqrestore(&chv_lock, flags);
1667
1668         return ret;
1669 }
1670
1671 static int chv_pinctrl_probe(struct platform_device *pdev)
1672 {
1673         struct chv_pinctrl *pctrl;
1674         struct acpi_device *adev;
1675         struct resource *res;
1676         acpi_status status;
1677         int ret, irq, i;
1678
1679         adev = ACPI_COMPANION(&pdev->dev);
1680         if (!adev)
1681                 return -ENODEV;
1682
1683         pctrl = devm_kzalloc(&pdev->dev, sizeof(*pctrl), GFP_KERNEL);
1684         if (!pctrl)
1685                 return -ENOMEM;
1686
1687         for (i = 0; i < ARRAY_SIZE(chv_communities); i++)
1688                 if (!strcmp(adev->pnp.unique_id, chv_communities[i]->uid)) {
1689                         pctrl->community = chv_communities[i];
1690                         break;
1691                 }
1692         if (i == ARRAY_SIZE(chv_communities))
1693                 return -ENODEV;
1694
1695         pctrl->dev = &pdev->dev;
1696
1697 #ifdef CONFIG_PM_SLEEP
1698         pctrl->saved_pin_context = devm_kcalloc(pctrl->dev,
1699                 pctrl->community->npins, sizeof(*pctrl->saved_pin_context),
1700                 GFP_KERNEL);
1701         if (!pctrl->saved_pin_context)
1702                 return -ENOMEM;
1703 #endif
1704
1705         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1706         pctrl->regs = devm_ioremap_resource(&pdev->dev, res);
1707         if (IS_ERR(pctrl->regs))
1708                 return PTR_ERR(pctrl->regs);
1709
1710         irq = platform_get_irq(pdev, 0);
1711         if (irq < 0) {
1712                 dev_err(&pdev->dev, "failed to get interrupt number\n");
1713                 return irq;
1714         }
1715
1716         pctrl->pctldesc = chv_pinctrl_desc;
1717         pctrl->pctldesc.name = dev_name(&pdev->dev);
1718         pctrl->pctldesc.pins = pctrl->community->pins;
1719         pctrl->pctldesc.npins = pctrl->community->npins;
1720
1721         pctrl->pctldev = devm_pinctrl_register(&pdev->dev, &pctrl->pctldesc,
1722                                                pctrl);
1723         if (IS_ERR(pctrl->pctldev)) {
1724                 dev_err(&pdev->dev, "failed to register pinctrl driver\n");
1725                 return PTR_ERR(pctrl->pctldev);
1726         }
1727
1728         ret = chv_gpio_probe(pctrl, irq);
1729         if (ret)
1730                 return ret;
1731
1732         status = acpi_install_address_space_handler(adev->handle,
1733                                         pctrl->community->acpi_space_id,
1734                                         chv_pinctrl_mmio_access_handler,
1735                                         NULL, pctrl);
1736         if (ACPI_FAILURE(status))
1737                 dev_err(&pdev->dev, "failed to install ACPI addr space handler\n");
1738
1739         platform_set_drvdata(pdev, pctrl);
1740
1741         return 0;
1742 }
1743
1744 static int chv_pinctrl_remove(struct platform_device *pdev)
1745 {
1746         struct chv_pinctrl *pctrl = platform_get_drvdata(pdev);
1747
1748         acpi_remove_address_space_handler(ACPI_COMPANION(&pdev->dev),
1749                                           pctrl->community->acpi_space_id,
1750                                           chv_pinctrl_mmio_access_handler);
1751
1752         return 0;
1753 }
1754
1755 #ifdef CONFIG_PM_SLEEP
1756 static int chv_pinctrl_suspend_noirq(struct device *dev)
1757 {
1758         struct platform_device *pdev = to_platform_device(dev);
1759         struct chv_pinctrl *pctrl = platform_get_drvdata(pdev);
1760         unsigned long flags;
1761         int i;
1762
1763         raw_spin_lock_irqsave(&chv_lock, flags);
1764
1765         pctrl->saved_intmask = readl(pctrl->regs + CHV_INTMASK);
1766
1767         for (i = 0; i < pctrl->community->npins; i++) {
1768                 const struct pinctrl_pin_desc *desc;
1769                 struct chv_pin_context *ctx;
1770                 void __iomem *reg;
1771
1772                 desc = &pctrl->community->pins[i];
1773                 if (chv_pad_locked(pctrl, desc->number))
1774                         continue;
1775
1776                 ctx = &pctrl->saved_pin_context[i];
1777
1778                 reg = chv_padreg(pctrl, desc->number, CHV_PADCTRL0);
1779                 ctx->padctrl0 = readl(reg) & ~CHV_PADCTRL0_GPIORXSTATE;
1780
1781                 reg = chv_padreg(pctrl, desc->number, CHV_PADCTRL1);
1782                 ctx->padctrl1 = readl(reg);
1783         }
1784
1785         raw_spin_unlock_irqrestore(&chv_lock, flags);
1786
1787         return 0;
1788 }
1789
1790 static int chv_pinctrl_resume_noirq(struct device *dev)
1791 {
1792         struct platform_device *pdev = to_platform_device(dev);
1793         struct chv_pinctrl *pctrl = platform_get_drvdata(pdev);
1794         unsigned long flags;
1795         int i;
1796
1797         raw_spin_lock_irqsave(&chv_lock, flags);
1798
1799         /*
1800          * Mask all interrupts before restoring per-pin configuration
1801          * registers because we don't know in which state BIOS left them
1802          * upon exiting suspend.
1803          */
1804         chv_writel(0, pctrl->regs + CHV_INTMASK);
1805
1806         for (i = 0; i < pctrl->community->npins; i++) {
1807                 const struct pinctrl_pin_desc *desc;
1808                 const struct chv_pin_context *ctx;
1809                 void __iomem *reg;
1810                 u32 val;
1811
1812                 desc = &pctrl->community->pins[i];
1813                 if (chv_pad_locked(pctrl, desc->number))
1814                         continue;
1815
1816                 ctx = &pctrl->saved_pin_context[i];
1817
1818                 /* Only restore if our saved state differs from the current */
1819                 reg = chv_padreg(pctrl, desc->number, CHV_PADCTRL0);
1820                 val = readl(reg) & ~CHV_PADCTRL0_GPIORXSTATE;
1821                 if (ctx->padctrl0 != val) {
1822                         chv_writel(ctx->padctrl0, reg);
1823                         dev_dbg(pctrl->dev, "restored pin %2u ctrl0 0x%08x\n",
1824                                 desc->number, readl(reg));
1825                 }
1826
1827                 reg = chv_padreg(pctrl, desc->number, CHV_PADCTRL1);
1828                 val = readl(reg);
1829                 if (ctx->padctrl1 != val) {
1830                         chv_writel(ctx->padctrl1, reg);
1831                         dev_dbg(pctrl->dev, "restored pin %2u ctrl1 0x%08x\n",
1832                                 desc->number, readl(reg));
1833                 }
1834         }
1835
1836         /*
1837          * Now that all pins are restored to known state, we can restore
1838          * the interrupt mask register as well.
1839          */
1840         chv_writel(0xffff, pctrl->regs + CHV_INTSTAT);
1841         chv_writel(pctrl->saved_intmask, pctrl->regs + CHV_INTMASK);
1842
1843         raw_spin_unlock_irqrestore(&chv_lock, flags);
1844
1845         return 0;
1846 }
1847 #endif
1848
1849 static const struct dev_pm_ops chv_pinctrl_pm_ops = {
1850         SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(chv_pinctrl_suspend_noirq,
1851                                       chv_pinctrl_resume_noirq)
1852 };
1853
1854 static const struct acpi_device_id chv_pinctrl_acpi_match[] = {
1855         { "INT33FF" },
1856         { }
1857 };
1858 MODULE_DEVICE_TABLE(acpi, chv_pinctrl_acpi_match);
1859
1860 static struct platform_driver chv_pinctrl_driver = {
1861         .probe = chv_pinctrl_probe,
1862         .remove = chv_pinctrl_remove,
1863         .driver = {
1864                 .name = "cherryview-pinctrl",
1865                 .pm = &chv_pinctrl_pm_ops,
1866                 .acpi_match_table = chv_pinctrl_acpi_match,
1867         },
1868 };
1869
1870 static int __init chv_pinctrl_init(void)
1871 {
1872         return platform_driver_register(&chv_pinctrl_driver);
1873 }
1874 subsys_initcall(chv_pinctrl_init);
1875
1876 static void __exit chv_pinctrl_exit(void)
1877 {
1878         platform_driver_unregister(&chv_pinctrl_driver);
1879 }
1880 module_exit(chv_pinctrl_exit);
1881
1882 MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>");
1883 MODULE_DESCRIPTION("Intel Cherryview/Braswell pinctrl driver");
1884 MODULE_LICENSE("GPL v2");