forked from Minki/linux
c31cc1b764
1) The above commit introduced a common ->get_pendown_state() function into the generic code, but that function was board-specific for the OMAP3EVM and thus broke most other boards using this code. 2) The above commit was mis-merged introducing another bug which prevents the ads7846 driver probe function to succeed. The omap_ads7846_init() function frees the pendown GPIO in case there is no ->get_pendown_state() function set by the caller (board specific code), so it can be requested later by the ads7846 driver. The above commit add a common ->get_pendown_state() function without removing the gpio_free() call and thus once the ads7846 driver tries to use the pendown GPIO, it crashes as the pendown GPIO has not been requested. 3) The above commit introduces NO new functionality as get_pendown_state() function is already implemented in a suitable way by the ads7846 driver and the debounce time handling has already been fixed by commit97ee9f01(ARM: OMAP: fix the ads7846 init code). This reverts commit16aced80f6. Conflicts: arch/arm/mach-omap2/common-board-devices.c Solved by taking the working version prior to the above commit. Cc: Zumeng Chen <zumeng.chen@windriver.com> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Igor Grinberg <grinberg@compulab.co.il> Reviewed-by: Kevin Hilman <khilman@ti.com> Tested-by: Kevin Hilman <khilman@ti.com> Signed-off-by: Kevin Hilman <khilman@ti.com>
144 lines
3.7 KiB
C
144 lines
3.7 KiB
C
/*
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* common-board-devices.c
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*
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* Copyright (C) 2011 CompuLab, Ltd.
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* Author: Mike Rapoport <mike@compulab.co.il>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*
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*/
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#include <linux/gpio.h>
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#include <linux/spi/spi.h>
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#include <linux/spi/ads7846.h>
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#include <plat/mcspi.h>
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#include <plat/nand.h>
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#include "common-board-devices.h"
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#if defined(CONFIG_TOUCHSCREEN_ADS7846) || \
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defined(CONFIG_TOUCHSCREEN_ADS7846_MODULE)
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static struct omap2_mcspi_device_config ads7846_mcspi_config = {
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.turbo_mode = 0,
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};
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static struct ads7846_platform_data ads7846_config = {
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.x_max = 0x0fff,
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.y_max = 0x0fff,
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.x_plate_ohms = 180,
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.pressure_max = 255,
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.debounce_max = 10,
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.debounce_tol = 3,
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.debounce_rep = 1,
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.gpio_pendown = -EINVAL,
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.keep_vref_on = 1,
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};
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static struct spi_board_info ads7846_spi_board_info __initdata = {
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.modalias = "ads7846",
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.bus_num = -EINVAL,
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.chip_select = 0,
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.max_speed_hz = 1500000,
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.controller_data = &ads7846_mcspi_config,
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.irq = -EINVAL,
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.platform_data = &ads7846_config,
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};
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void __init omap_ads7846_init(int bus_num, int gpio_pendown, int gpio_debounce,
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struct ads7846_platform_data *board_pdata)
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{
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struct spi_board_info *spi_bi = &ads7846_spi_board_info;
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int err;
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err = gpio_request_one(gpio_pendown, GPIOF_IN, "TSPenDown");
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if (err) {
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pr_err("Couldn't obtain gpio for TSPenDown: %d\n", err);
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return;
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}
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if (gpio_debounce)
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gpio_set_debounce(gpio_pendown, gpio_debounce);
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spi_bi->bus_num = bus_num;
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spi_bi->irq = gpio_to_irq(gpio_pendown);
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if (board_pdata) {
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board_pdata->gpio_pendown = gpio_pendown;
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spi_bi->platform_data = board_pdata;
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if (board_pdata->get_pendown_state)
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gpio_export(gpio_pendown, 0);
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} else {
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ads7846_config.gpio_pendown = gpio_pendown;
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}
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if (!board_pdata || (board_pdata && !board_pdata->get_pendown_state))
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gpio_free(gpio_pendown);
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spi_register_board_info(&ads7846_spi_board_info, 1);
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}
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#else
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void __init omap_ads7846_init(int bus_num, int gpio_pendown, int gpio_debounce,
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struct ads7846_platform_data *board_pdata)
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{
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}
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#endif
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#if defined(CONFIG_MTD_NAND_OMAP2) || defined(CONFIG_MTD_NAND_OMAP2_MODULE)
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static struct omap_nand_platform_data nand_data;
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void __init omap_nand_flash_init(int options, struct mtd_partition *parts,
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int nr_parts)
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{
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u8 cs = 0;
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u8 nandcs = GPMC_CS_NUM + 1;
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/* find out the chip-select on which NAND exists */
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while (cs < GPMC_CS_NUM) {
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u32 ret = 0;
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ret = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG1);
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if ((ret & 0xC00) == 0x800) {
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printk(KERN_INFO "Found NAND on CS%d\n", cs);
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if (nandcs > GPMC_CS_NUM)
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nandcs = cs;
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}
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cs++;
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}
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if (nandcs > GPMC_CS_NUM) {
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printk(KERN_INFO "NAND: Unable to find configuration "
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"in GPMC\n ");
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return;
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}
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if (nandcs < GPMC_CS_NUM) {
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nand_data.cs = nandcs;
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nand_data.parts = parts;
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nand_data.nr_parts = nr_parts;
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nand_data.devsize = options;
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printk(KERN_INFO "Registering NAND on CS%d\n", nandcs);
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if (gpmc_nand_init(&nand_data) < 0)
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printk(KERN_ERR "Unable to register NAND device\n");
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}
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}
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#else
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void __init omap_nand_flash_init(int options, struct mtd_partition *parts,
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int nr_parts)
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{
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}
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#endif
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