arch/arm/mach-imx/imx51-dt.c

   1 /*
   2  * Copyright 2011 Freescale Semiconductor, Inc. All Rights Reserved.
   3  * Copyright 2011 Linaro Ltd.
   4  *
   5  * The code contained herein is licensed under the GNU General Public
   6  * License. You may obtain a copy of the GNU General Public License
   7  * Version 2 or later at the following locations:
   8  *
   9  * http://www.opensource.org/licenses/gpl-license.html
  10  * http://www.gnu.org/copyleft/gpl.html
  11  */
  12
  13 #include <linux/irq.h>
  14 #include <linux/irqdomain.h>
  15 #include <linux/of_irq.h>
  16 #include <linux/of_platform.h>
  17 #include <linux/pinctrl/machine.h>
  18 #include <asm/mach/arch.h>
  19 #include <asm/mach/time.h>
  20 #include <mach/common.h>
  21 #include <mach/mx51.h>
  22
  23 /*
  24  * Lookup table for attaching a specific name and platform_data pointer to
  25  * devices as they get created by of_platform_populate().  Ideally this table
  26  * would not exist, but the current clock implementation depends on some devices
  27  * having a specific name.
  28  */
  29 static const struct of_dev_auxdata imx51_auxdata_lookup[] __initconst = {
  30         OF_DEV_AUXDATA("fsl,imx51-uart", MX51_UART1_BASE_ADDR, "imx21-uart.0", NULL),
  31         OF_DEV_AUXDATA("fsl,imx51-uart", MX51_UART2_BASE_ADDR, "imx21-uart.1", NULL),
  32         OF_DEV_AUXDATA("fsl,imx51-uart", MX51_UART3_BASE_ADDR, "imx21-uart.2", NULL),
  33         OF_DEV_AUXDATA("fsl,imx51-fec", MX51_FEC_BASE_ADDR, "imx27-fec.0", NULL),
  34         OF_DEV_AUXDATA("fsl,imx51-esdhc", MX51_ESDHC1_BASE_ADDR, "sdhci-esdhc-imx51.0", NULL),
  35         OF_DEV_AUXDATA("fsl,imx51-esdhc", MX51_ESDHC2_BASE_ADDR, "sdhci-esdhc-imx51.1", NULL),
  36         OF_DEV_AUXDATA("fsl,imx51-esdhc", MX51_ESDHC3_BASE_ADDR, "sdhci-esdhc-imx51.2", NULL),
  37         OF_DEV_AUXDATA("fsl,imx51-esdhc", MX51_ESDHC4_BASE_ADDR, "sdhci-esdhc-imx51.3", NULL),
  38         OF_DEV_AUXDATA("fsl,imx51-ecspi", MX51_ECSPI1_BASE_ADDR, "imx51-ecspi.0", NULL),
  39         OF_DEV_AUXDATA("fsl,imx51-ecspi", MX51_ECSPI2_BASE_ADDR, "imx51-ecspi.1", NULL),
  40         OF_DEV_AUXDATA("fsl,imx51-cspi", MX51_CSPI_BASE_ADDR, "imx35-cspi.0", NULL),
  41         OF_DEV_AUXDATA("fsl,imx51-i2c", MX51_I2C1_BASE_ADDR, "imx-i2c.0", NULL),
  42         OF_DEV_AUXDATA("fsl,imx51-i2c", MX51_I2C2_BASE_ADDR, "imx-i2c.1", NULL),
  43         OF_DEV_AUXDATA("fsl,imx51-sdma", MX51_SDMA_BASE_ADDR, "imx35-sdma", NULL),
  44         OF_DEV_AUXDATA("fsl,imx51-wdt", MX51_WDOG1_BASE_ADDR, "imx2-wdt.0", NULL),
  45         { /* sentinel */ }
  46 };
  47
  48 static int __init imx51_tzic_add_irq_domain(struct device_node *np,
  49                                 struct device_node *interrupt_parent)
  50 {
  51         irq_domain_add_legacy(np, 128, 0, 0, &irq_domain_simple_ops, NULL);
  52         return 0;
  53 }
  54
  55 static int __init imx51_gpio_add_irq_domain(struct device_node *np,
  56                                 struct device_node *interrupt_parent)
  57 {
  58         static int gpio_irq_base = MXC_GPIO_IRQ_START + ARCH_NR_GPIOS;
  59
  60         gpio_irq_base -= 32;
  61         irq_domain_add_legacy(np, 32, gpio_irq_base, 0, &irq_domain_simple_ops, NULL);
  62
  63         return 0;
  64 }
  65
  66 static const struct of_device_id imx51_irq_match[] __initconst = {
  67         { .compatible = "fsl,imx51-tzic", .data = imx51_tzic_add_irq_domain, },
  68         { .compatible = "fsl,imx51-gpio", .data = imx51_gpio_add_irq_domain, },
  69         { /* sentinel */ }
  70 };
  71
  72 static const struct of_device_id imx51_iomuxc_of_match[] __initconst = {
  73         { .compatible = "fsl,imx51-iomuxc-babbage", .data = imx51_babbage_common_init, },
  74         { /* sentinel */ }
  75 };
  76
  77 static void __init imx51_dt_init(void)
  78 {
  79         struct device_node *node;
  80         const struct of_device_id *of_id;
  81         void (*func)(void);
  82
  83         of_irq_init(imx51_irq_match);
  84
  85         pinctrl_provide_dummies();
  86
  87         node = of_find_matching_node(NULL, imx51_iomuxc_of_match);
  88         if (node) {
  89                 of_id = of_match_node(imx51_iomuxc_of_match, node);
  90                 func = of_id->data;
  91                 func();
  92                 of_node_put(node);
  93         }
  94
  95         of_platform_populate(NULL, of_default_bus_match_table,
  96                              imx51_auxdata_lookup, NULL);
  97 }
  98
  99 static void __init imx51_timer_init(void)
 100 {
 101         mx51_clocks_init_dt();
 102 }
 103
 104 static struct sys_timer imx51_timer = {
 105         .init = imx51_timer_init,
 106 };
 107
 108 static const char *imx51_dt_board_compat[] __initdata = {
 109         "fsl,imx51-babbage",
 110         "fsl,imx51",
 111         NULL
 112 };
 113
 114 DT_MACHINE_START(IMX51_DT, "Freescale i.MX51 (Device Tree Support)")
 115         .map_io         = mx51_map_io,
 116         .init_early     = imx51_init_early,
 117         .init_irq       = mx51_init_irq,
 118         .handle_irq     = imx51_handle_irq,
 119         .timer          = &imx51_timer,
 120         .init_machine   = imx51_dt_init,
 121         .init_late      = imx51_init_late,
 122         .dt_compat      = imx51_dt_board_compat,
 123         .restart        = mxc_restart,
 124 MACHINE_END