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omap: consolidate touch screen initialization among different boards

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Add common-board-devices.c that will contain the code for peripheral
devices initializatoin shared between multiple boards.
Start small with touchscreen initialization.

Signed-off-by: Mike Rapoport <mike@compulab.co.il>
Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Mike Rapoport
2011-04-25 01:09:05 +03:00
committed by Tony Lindgren
parent d14f81741f
commit 96974a249b
12 changed files with 128 additions and 444 deletions
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56
arch/arm/mach-omap2/board-devkit8000.c
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@@ -51,7 +51,6 @@
#include <plat/mcspi.h>
#include <linux/input/matrix_keypad.h>
#include <linux/spi/spi.h>
#include <linux/spi/ads7846.h>
#include <linux/dm9000.h>
#include <linux/interrupt.h>
@@ -60,6 +59,7 @@
#include "mux.h"
#include "hsmmc.h"
#include "timer-gp.h"
#include "common-board-devices.h"
#define NAND_BLOCK_SIZE SZ_128K
@@ -463,56 +463,6 @@ static void __init devkit8000_init_irq(void)
#endif
}
static void __init devkit8000_ads7846_init(void)
{
int gpio = OMAP3_DEVKIT_TS_GPIO;
int ret;
ret = gpio_request(gpio, "ads7846_pen_down");
if (ret < 0) {
printk(KERN_ERR "Failed to request GPIO %d for "
"ads7846 pen down IRQ\n", gpio);
return;
}
gpio_direction_input(gpio);
}
static int ads7846_get_pendown_state(void)
{
return !gpio_get_value(OMAP3_DEVKIT_TS_GPIO);
}
static struct ads7846_platform_data ads7846_config = {
.x_max = 0x0fff,
.y_max = 0x0fff,
.x_plate_ohms = 180,
.pressure_max = 255,
.debounce_max = 10,
.debounce_tol = 5,
.debounce_rep = 1,
.get_pendown_state = ads7846_get_pendown_state,
.keep_vref_on = 1,
.settle_delay_usecs = 150,
};
static struct omap2_mcspi_device_config ads7846_mcspi_config = {
.turbo_mode = 0,
.single_channel = 1, /* 0: slave, 1: master */
};
static struct spi_board_info devkit8000_spi_board_info[] __initdata = {
{
.modalias = "ads7846",
.bus_num = 2,
.chip_select = 0,
.max_speed_hz = 1500000,
.controller_data = &ads7846_mcspi_config,
.irq = OMAP_GPIO_IRQ(OMAP3_DEVKIT_TS_GPIO),
.platform_data = &ads7846_config,
}
};
#define OMAP_DM9000_BASE 0x2c000000
static struct resource omap_dm9000_resources[] = {
@@ -795,10 +745,8 @@ static void __init devkit8000_init(void)
ARRAY_SIZE(devkit8000_devices));
omap_display_init(&devkit8000_dss_data);
spi_register_board_info(devkit8000_spi_board_info,
ARRAY_SIZE(devkit8000_spi_board_info));
devkit8000_ads7846_init();
omap_ads7846_init(2, OMAP3_DEVKIT_TS_GPIO, 0, NULL);
usb_musb_init(&musb_board_data);
usbhs_init(&usbhs_bdata);