arch/arm/plat-iop/i2c.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * arch/arm/plat-iop/i2c.c
   4  *
   5  * Author: Nicolas Pitre <nico@cam.org>
   6  * Copyright (C) 2001 MontaVista Software, Inc.
   7  * Copyright (C) 2004 Intel Corporation.
   8  */
   9
  10 #include <linux/mm.h>
  11 #include <linux/init.h>
  12 #include <linux/major.h>
  13 #include <linux/fs.h>
  14 #include <linux/platform_device.h>
  15 #include <linux/serial.h>
  16 #include <linux/tty.h>
  17 #include <linux/serial_core.h>
  18 #include <linux/io.h>
  19 #include <linux/gpio/machine.h>
  20 #include <asm/pgtable.h>
  21 #include <asm/page.h>
  22 #include <asm/mach/map.h>
  23 #include <asm/setup.h>
  24 #include <asm/memory.h>
  25 #include <mach/hardware.h>
  26 #include <asm/hardware/iop3xx.h>
  27 #include <asm/mach/arch.h>
  28
  29 #ifdef CONFIG_ARCH_IOP32X
  30 #define IRQ_IOP3XX_I2C_0        IRQ_IOP32X_I2C_0
  31 #define IRQ_IOP3XX_I2C_1        IRQ_IOP32X_I2C_1
  32 #endif
  33 #ifdef CONFIG_ARCH_IOP33X
  34 #define IRQ_IOP3XX_I2C_0        IRQ_IOP33X_I2C_0
  35 #define IRQ_IOP3XX_I2C_1        IRQ_IOP33X_I2C_1
  36 #endif
  37
  38 /*
  39  * Each of the I2C busses have corresponding GPIO lines, and the driver
  40  * need to access these directly to drive the bus low at times.
  41  */
  42
  43 struct gpiod_lookup_table iop3xx_i2c0_gpio_lookup = {
  44         .dev_id = "IOP3xx-I2C.0",
  45         .table = {
  46                 GPIO_LOOKUP("gpio-iop", 7, "scl", GPIO_ACTIVE_HIGH),
  47                 GPIO_LOOKUP("gpio-iop", 6, "sda", GPIO_ACTIVE_HIGH),
  48                 { }
  49         },
  50 };
  51
  52 struct gpiod_lookup_table iop3xx_i2c1_gpio_lookup = {
  53         .dev_id = "IOP3xx-I2C.1",
  54         .table = {
  55                 GPIO_LOOKUP("gpio-iop", 5, "scl", GPIO_ACTIVE_HIGH),
  56                 GPIO_LOOKUP("gpio-iop", 4, "sda", GPIO_ACTIVE_HIGH),
  57                 { }
  58         },
  59 };
  60
  61 static struct resource iop3xx_i2c0_resources[] = {
  62         [0] = {
  63                 .start  = 0xfffff680,
  64                 .end    = 0xfffff697,
  65                 .flags  = IORESOURCE_MEM,
  66         },
  67         [1] = {
  68                 .start  = IRQ_IOP3XX_I2C_0,
  69                 .end    = IRQ_IOP3XX_I2C_0,
  70                 .flags  = IORESOURCE_IRQ,
  71         },
  72 };
  73
  74 struct platform_device iop3xx_i2c0_device = {
  75         .name           = "IOP3xx-I2C",
  76         .id             = 0,
  77         .num_resources  = 2,
  78         .resource       = iop3xx_i2c0_resources,
  79 };
  80
  81
  82 static struct resource iop3xx_i2c1_resources[] = {
  83         [0] = {
  84                 .start  = 0xfffff6a0,
  85                 .end    = 0xfffff6b7,
  86                 .flags  = IORESOURCE_MEM,
  87         },
  88         [1] = {
  89                 .start  = IRQ_IOP3XX_I2C_1,
  90                 .end    = IRQ_IOP3XX_I2C_1,
  91                 .flags  = IORESOURCE_IRQ,
  92         }
  93 };
  94
  95 struct platform_device iop3xx_i2c1_device = {
  96         .name           = "IOP3xx-I2C",
  97         .id             = 1,
  98         .num_resources  = 2,
  99         .resource       = iop3xx_i2c1_resources,
 100 };