root/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/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 <asm/mach/arch.h>
  26 
  27 #include "hardware.h"
  28 #include "iop3xx.h"
  29 #include "irqs.h"
  30 
  31 /*
  32  * Each of the I2C busses have corresponding GPIO lines, and the driver
  33  * need to access these directly to drive the bus low at times.
  34  */
  35 
  36 struct gpiod_lookup_table iop3xx_i2c0_gpio_lookup = {
  37         .dev_id = "IOP3xx-I2C.0",
  38         .table = {
  39                 GPIO_LOOKUP("gpio-iop", 7, "scl", GPIO_ACTIVE_HIGH),
  40                 GPIO_LOOKUP("gpio-iop", 6, "sda", GPIO_ACTIVE_HIGH),
  41                 { }
  42         },
  43 };
  44 
  45 struct gpiod_lookup_table iop3xx_i2c1_gpio_lookup = {
  46         .dev_id = "IOP3xx-I2C.1",
  47         .table = {
  48                 GPIO_LOOKUP("gpio-iop", 5, "scl", GPIO_ACTIVE_HIGH),
  49                 GPIO_LOOKUP("gpio-iop", 4, "sda", GPIO_ACTIVE_HIGH),
  50                 { }
  51         },
  52 };
  53 
  54 static struct resource iop3xx_i2c0_resources[] = {
  55         [0] = {
  56                 .start  = 0xfffff680,
  57                 .end    = 0xfffff697,
  58                 .flags  = IORESOURCE_MEM,
  59         },
  60         [1] = {
  61                 .start  = IRQ_IOP32X_I2C_0,
  62                 .end    = IRQ_IOP32X_I2C_0,
  63                 .flags  = IORESOURCE_IRQ,
  64         },
  65 };
  66 
  67 struct platform_device iop3xx_i2c0_device = {
  68         .name           = "IOP3xx-I2C",
  69         .id             = 0,
  70         .num_resources  = 2,
  71         .resource       = iop3xx_i2c0_resources,
  72 };
  73 
  74 
  75 static struct resource iop3xx_i2c1_resources[] = {
  76         [0] = {
  77                 .start  = 0xfffff6a0,
  78                 .end    = 0xfffff6b7,
  79                 .flags  = IORESOURCE_MEM,
  80         },
  81         [1] = {
  82                 .start  = IRQ_IOP32X_I2C_1,
  83                 .end    = IRQ_IOP32X_I2C_1,
  84                 .flags  = IORESOURCE_IRQ,
  85         }
  86 };
  87 
  88 struct platform_device iop3xx_i2c1_device = {
  89         .name           = "IOP3xx-I2C",
  90         .id             = 1,
  91         .num_resources  = 2,
  92         .resource       = iop3xx_i2c1_resources,
  93 };