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| author |   Andrew Victor <andrew@sanpeople.com> | 2007-05-02 18:00:45 +0100 |
|---|---|---|
| committer |   Russell King <rmk+kernel@arm.linux.org.uk> | 2007-05-03 14:10:26 +0100 |
| commit | 7c73628f24ea73479232d1b608359aa7d8d2c95d (patch) | |
| tree | 36d289e388d589f8e580730e8f61598232ff6392 /arch/arm | |
| parent | [ARM] 4353/1: AT91: Support ADS7846 touchsceen on SAM9261-EK board (diff) | |
| download | linux-dev-7c73628f24ea73479232d1b608359aa7d8d2c95d.tar.xz linux-dev-7c73628f24ea73479232d1b608359aa7d8d2c95d.zip | |
[ARM] 4354/1: AT91: Support ADS7846 touchsceen on SAM9263-EK board
Add support for the ADS7846 Touchscreen found on the Atmel
AT91SAM9263-EK board.
Signed-off-by: Nicolas Ferre <nicolas.ferre@rfo.atmel.com>
Signed-off-by: Andrew Victor <andrew@sanpeople.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/mach-at91/board-sam9263ek.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/arch/arm/mach-at91/board-sam9263ek.c b/arch/arm/mach-at91/board-sam9263ek.c index 8fdce11a880c..81d3d6a0a86a 100644 --- a/arch/arm/mach-at91/board-sam9263ek.c +++ b/arch/arm/mach-at91/board-sam9263ek.c @@ -25,6 +25,7 @@ #include <linux/module.h> #include <linux/platform_device.h> #include <linux/spi/spi.h> +#include <linux/spi/ads7846.h> #include <asm/hardware.h> #include <asm/setup.h> @@ -86,6 +87,40 @@ static struct at91_udc_data __initdata ek_udc_data = { /* + * ADS7846 Touchscreen + */ +#if defined(CONFIG_TOUCHSCREEN_ADS7846) || defined(CONFIG_TOUCHSCREEN_ADS7846_MODULE) +static int ads7843_pendown_state(void) +{ + return !at91_get_gpio_value(AT91_PIN_PA15); /* Touchscreen PENIRQ */ +} + +static struct ads7846_platform_data ads_info = { + .model = 7843, + .x_min = 150, + .x_max = 3830, + .y_min = 190, + .y_max = 3830, + .vref_delay_usecs = 100, + .x_plate_ohms = 450, + .y_plate_ohms = 250, + .pressure_max = 15000, + .debounce_max = 1, + .debounce_rep = 0, + .debounce_tol = (~0), + .get_pendown_state = ads7843_pendown_state, +}; + +static void __init ek_add_device_ts(void) +{ + at91_set_B_periph(AT91_PIN_PA15, 1); /* External IRQ1, with pullup */ + at91_set_gpio_input(AT91_PIN_PA31, 1); /* Touchscreen BUSY signal */ +} +#else +static void __init ek_add_device_ts(void) {} +#endif + +/* * SPI devices. */ static struct spi_board_info ek_spi_devices[] = { @@ -97,6 +132,16 @@ static struct spi_board_info ek_spi_devices[] = { .bus_num = 0, }, #endif +#if defined(CONFIG_TOUCHSCREEN_ADS7846) || defined(CONFIG_TOUCHSCREEN_ADS7846_MODULE) + { + .modalias = "ads7846", + .chip_select = 3, + .max_speed_hz = 125000 * 26, /* (max sample rate @ 3V) * (cmd + data + overhead) */ + .bus_num = 0, + .platform_data = &ads_info, + .irq = AT91SAM9263_ID_IRQ1, + }, +#endif }; @@ -157,7 +202,10 @@ static void __init ek_board_init(void) /* USB Device */ at91_add_device_udc(&ek_udc_data); /* SPI */ + at91_set_gpio_output(AT91_PIN_PE20, 1); /* select spi0 clock */ at91_add_device_spi(ek_spi_devices, ARRAY_SIZE(ek_spi_devices)); + /* Touchscreen */ + ek_add_device_ts(); /* MMC */ at91_add_device_mmc(1, &ek_mmc_data); /* NAND */ |