2 * common-board-devices.c
4 * Copyright (C) 2011 CompuLab, Ltd.
5 * Author: Mike Rapoport <mike@compulab.co.il>
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.
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.
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
23 #include <linux/gpio.h>
24 #include <linux/spi/spi.h>
25 #include <linux/spi/ads7846.h>
27 #include <plat/mcspi.h>
28 #include <plat/nand.h>
30 #include "common-board-devices.h"
32 #if defined(CONFIG_TOUCHSCREEN_ADS7846) || \
33 defined(CONFIG_TOUCHSCREEN_ADS7846_MODULE)
34 static struct omap2_mcspi_device_config ads7846_mcspi_config = {
38 static struct ads7846_platform_data ads7846_config = {
46 .gpio_pendown = -EINVAL,
50 static struct spi_board_info ads7846_spi_board_info __initdata = {
51 .modalias = "ads7846",
54 .max_speed_hz = 1500000,
55 .controller_data = &ads7846_mcspi_config,
57 .platform_data = &ads7846_config,
60 void __init omap_ads7846_init(int bus_num, int gpio_pendown, int gpio_debounce,
61 struct ads7846_platform_data *board_pdata)
63 struct spi_board_info *spi_bi = &ads7846_spi_board_info;
66 err = gpio_request_one(gpio_pendown, GPIOF_IN, "TSPenDown");
68 pr_err("Couldn't obtain gpio for TSPenDown: %d\n", err);
73 gpio_set_debounce(gpio_pendown, gpio_debounce);
75 spi_bi->bus_num = bus_num;
76 spi_bi->irq = gpio_to_irq(gpio_pendown);
79 board_pdata->gpio_pendown = gpio_pendown;
80 spi_bi->platform_data = board_pdata;
81 if (board_pdata->get_pendown_state)
82 gpio_export(gpio_pendown, 0);
84 ads7846_config.gpio_pendown = gpio_pendown;
87 if (!board_pdata || (board_pdata && !board_pdata->get_pendown_state))
88 gpio_free(gpio_pendown);
90 spi_register_board_info(&ads7846_spi_board_info, 1);
93 void __init omap_ads7846_init(int bus_num, int gpio_pendown, int gpio_debounce,
94 struct ads7846_platform_data *board_pdata)
99 #if defined(CONFIG_MTD_NAND_OMAP2) || defined(CONFIG_MTD_NAND_OMAP2_MODULE)
100 static struct omap_nand_platform_data nand_data;
102 void __init omap_nand_flash_init(int options, struct mtd_partition *parts,
106 u8 nandcs = GPMC_CS_NUM + 1;
108 /* find out the chip-select on which NAND exists */
109 while (cs < GPMC_CS_NUM) {
111 ret = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG1);
113 if ((ret & 0xC00) == 0x800) {
114 printk(KERN_INFO "Found NAND on CS%d\n", cs);
115 if (nandcs > GPMC_CS_NUM)
121 if (nandcs > GPMC_CS_NUM) {
122 printk(KERN_INFO "NAND: Unable to find configuration "
127 if (nandcs < GPMC_CS_NUM) {
128 nand_data.cs = nandcs;
129 nand_data.parts = parts;
130 nand_data.nr_parts = nr_parts;
131 nand_data.devsize = options;
133 printk(KERN_INFO "Registering NAND on CS%d\n", nandcs);
134 if (gpmc_nand_init(&nand_data) < 0)
135 printk(KERN_ERR "Unable to register NAND device\n");
139 void __init omap_nand_flash_init(int options, struct mtd_partition *parts,