LXR linux/arch/arm/mach-omap2/common-board-devices.c

   1/*
   2 * common-board-devices.c
   3 *
   4 * Copyright (C) 2011 CompuLab, Ltd.
   5 * Author: Mike Rapoport <mike@compulab.co.il>
   6 *
   7 * This program is free software; you can redistribute it and/or
   8 * modify it under the terms of the GNU General Public License
   9 * version 2 as published by the Free Software Foundation.
  10 *
  11 * This program is distributed in the hope that it will be useful, but
  12 * WITHOUT ANY WARRANTY; without even the implied warranty of
  13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 * General Public License for more details.
  15 *
  16 * You should have received a copy of the GNU General Public License
  17 * along with this program; if not, write to the Free Software
  18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  19 * 02110-1301 USA
  20 *
  21 */
  22
  23#include <linux/i2c.h>
  24#include <linux/i2c/twl.h>
  25
  26#include <linux/gpio.h>
  27#include <linux/spi/spi.h>
  28#include <linux/spi/ads7846.h>
  29
  30#include <plat/i2c.h>
  31#include <plat/mcspi.h>
  32#include <plat/nand.h>
  33
  34#include "common-board-devices.h"
  35
  36static struct i2c_board_info __initdata pmic_i2c_board_info = {
  37        .addr           = 0x48,
  38        .flags          = I2C_CLIENT_WAKE,
  39};
  40
  41void __init omap_pmic_init(int bus, u32 clkrate,
  42                           const char *pmic_type, int pmic_irq,
  43                           struct twl4030_platform_data *pmic_data)
  44{
  45        strncpy(pmic_i2c_board_info.type, pmic_type,
  46                sizeof(pmic_i2c_board_info.type));
  47        pmic_i2c_board_info.irq = pmic_irq;
  48        pmic_i2c_board_info.platform_data = pmic_data;
  49
  50        omap_register_i2c_bus(bus, clkrate, &pmic_i2c_board_info, 1);
  51}
  52
  53#if defined(CONFIG_TOUCHSCREEN_ADS7846) || \
  54        defined(CONFIG_TOUCHSCREEN_ADS7846_MODULE)
  55static struct omap2_mcspi_device_config ads7846_mcspi_config = {
  56        .turbo_mode     = 0,
  57        .single_channel = 1,    /* 0: slave, 1: master */
  58};
  59
  60static struct ads7846_platform_data ads7846_config = {
  61        .x_max                  = 0x0fff,
  62        .y_max                  = 0x0fff,
  63        .x_plate_ohms           = 180,
  64        .pressure_max           = 255,
  65        .debounce_max           = 10,
  66        .debounce_tol           = 3,
  67        .debounce_rep           = 1,
  68        .gpio_pendown           = -EINVAL,
  69        .keep_vref_on           = 1,
  70};
  71
  72static struct spi_board_info ads7846_spi_board_info __initdata = {
  73        .modalias               = "ads7846",
  74        .bus_num                = -EINVAL,
  75        .chip_select            = 0,
  76        .max_speed_hz           = 1500000,
  77        .controller_data        = &ads7846_mcspi_config,
  78        .irq                    = -EINVAL,
  79        .platform_data          = &ads7846_config,
  80};
  81
  82void __init omap_ads7846_init(int bus_num, int gpio_pendown, int gpio_debounce,
  83                              struct ads7846_platform_data *board_pdata)
  84{
  85        struct spi_board_info *spi_bi = &ads7846_spi_board_info;
  86        int err;
  87
  88        if (board_pdata && board_pdata->get_pendown_state) {
  89                err = gpio_request_one(gpio_pendown, GPIOF_IN, "TSPenDown");
  90                if (err) {
  91                        pr_err("Couldn't obtain gpio for TSPenDown: %d\n", err);
  92                        return;
  93                }
  94                gpio_export(gpio_pendown, 0);
  95
  96                if (gpio_debounce)
  97                        gpio_set_debounce(gpio_pendown, gpio_debounce);
  98        }
  99
 100        ads7846_config.gpio_pendown = gpio_pendown;
 101
 102        spi_bi->bus_num = bus_num;
 103        spi_bi->irq     = OMAP_GPIO_IRQ(gpio_pendown);
 104
 105        if (board_pdata)
 106                spi_bi->platform_data = board_pdata;
 107
 108        spi_register_board_info(&ads7846_spi_board_info, 1);
 109}
 110#else
 111void __init omap_ads7846_init(int bus_num, int gpio_pendown, int gpio_debounce,
 112                              struct ads7846_platform_data *board_pdata)
 113{
 114}
 115#endif
 116
 117#if defined(CONFIG_MTD_NAND_OMAP2) || defined(CONFIG_MTD_NAND_OMAP2_MODULE)
 118static struct omap_nand_platform_data nand_data = {
 119        .dma_channel    = -1,           /* disable DMA in OMAP NAND driver */
 120};
 121
 122void __init omap_nand_flash_init(int options, struct mtd_partition *parts,
 123                                 int nr_parts)
 124{
 125        u8 cs = 0;
 126        u8 nandcs = GPMC_CS_NUM + 1;
 127
 128        /* find out the chip-select on which NAND exists */
 129        while (cs < GPMC_CS_NUM) {
 130                u32 ret = 0;
 131                ret = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG1);
 132
 133                if ((ret & 0xC00) == 0x800) {
 134                        printk(KERN_INFO "Found NAND on CS%d\n", cs);
 135                        if (nandcs > GPMC_CS_NUM)
 136                                nandcs = cs;
 137                }
 138                cs++;
 139        }
 140
 141        if (nandcs > GPMC_CS_NUM) {
 142                printk(KERN_INFO "NAND: Unable to find configuration "
 143                                 "in GPMC\n ");
 144                return;
 145        }
 146
 147        if (nandcs < GPMC_CS_NUM) {
 148                nand_data.cs = nandcs;
 149                nand_data.parts = parts;
 150                nand_data.nr_parts = nr_parts;
 151                nand_data.options = options;
 152
 153                printk(KERN_INFO "Registering NAND on CS%d\n", nandcs);
 154                if (gpmc_nand_init(&nand_data) < 0)
 155                        printk(KERN_ERR "Unable to register NAND device\n");
 156        }
 157}
 158#else
 159void __init omap_nand_flash_init(int options, struct mtd_partition *parts,
 160                                 int nr_parts)
 161{
 162}
 163#endif
 164