arch/arm/mach-iop32x/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/page.h>
  21 #include <asm/mach/map.h>
  22 #include <asm/setup.h>
  23 #include <asm/memory.h>
  24 #include <asm/mach/arch.h>
  25
  26 #include "hardware.h"
  27 #include "iop3xx.h"
  28 #include "irqs.h"
  29
  30 /*
  31  * Each of the I2C busses have corresponding GPIO lines, and the driver
  32  * need to access these directly to drive the bus low at times.
  33  */
  34
  35 struct gpiod_lookup_table iop3xx_i2c0_gpio_lookup = {
  36         .dev_id = "IOP3xx-I2C.0",
  37         .table = {
  38                 GPIO_LOOKUP("gpio-iop", 7, "scl", GPIO_ACTIVE_HIGH),
  39                 GPIO_LOOKUP("gpio-iop", 6, "sda", GPIO_ACTIVE_HIGH),
  40                 { }
  41         },
  42 };
  43
  44 struct gpiod_lookup_table iop3xx_i2c1_gpio_lookup = {
  45         .dev_id = "IOP3xx-I2C.1",
  46         .table = {
  47                 GPIO_LOOKUP("gpio-iop", 5, "scl", GPIO_ACTIVE_HIGH),
  48                 GPIO_LOOKUP("gpio-iop", 4, "sda", GPIO_ACTIVE_HIGH),
  49                 { }
  50         },
  51 };
  52
  53 static struct resource iop3xx_i2c0_resources[] = {
  54         [0] = {
  55                 .start  = 0xfffff680,
  56                 .end    = 0xfffff697,
  57                 .flags  = IORESOURCE_MEM,
  58         },
  59         [1] = {
  60                 .start  = IRQ_IOP32X_I2C_0,
  61                 .end    = IRQ_IOP32X_I2C_0,
  62                 .flags  = IORESOURCE_IRQ,
  63         },
  64 };
  65
  66 struct platform_device iop3xx_i2c0_device = {
  67         .name           = "IOP3xx-I2C",
  68         .id             = 0,
  69         .num_resources  = 2,
  70         .resource       = iop3xx_i2c0_resources,
  71 };
  72
  73
  74 static struct resource iop3xx_i2c1_resources[] = {
  75         [0] = {
  76                 .start  = 0xfffff6a0,
  77                 .end    = 0xfffff6b7,
  78                 .flags  = IORESOURCE_MEM,
  79         },
  80         [1] = {
  81                 .start  = IRQ_IOP32X_I2C_1,
  82                 .end    = IRQ_IOP32X_I2C_1,
  83                 .flags  = IORESOURCE_IRQ,
  84         }
  85 };
  86
  87 struct platform_device iop3xx_i2c1_device = {
  88         .name           = "IOP3xx-I2C",
  89         .id             = 1,
  90         .num_resources  = 2,
  91         .resource       = iop3xx_i2c1_resources,
  92 };