diff options
| author | Manuel Lauss <manuel.lauss@googlemail.com> | 2011-12-08 10:42:15 +0000 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2011-12-08 10:42:15 +0000 |
| commit | 2a32daf117bdd1958d9297b19f1684737e742723 (patch) | |
| tree | 18de3ca82d69fc0c9a13641688acdbe38e0d9139 /arch | |
| parent | e734ae13f125096f8467f90e00c27166860245cd (diff) | |
MIPS: Alchemy: Touchscreen support on DB1100
Wire up the ADS7846 touchscreen controller on the DB1100.
Signed-off-by: Manuel Lauss <manuel.lauss@googlemail.com>
To: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/2879/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/mips/alchemy/devboards/db1000.c | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/arch/mips/alchemy/devboards/db1000.c b/arch/mips/alchemy/devboards/db1000.c index 5206d2fbe0c..1b81dbf6b80 100644 --- a/arch/mips/alchemy/devboards/db1000.c +++ b/arch/mips/alchemy/devboards/db1000.c @@ -28,6 +28,9 @@ #include <linux/module.h> #include <linux/platform_device.h> #include <linux/pm.h> +#include <linux/spi/spi.h> +#include <linux/spi/spi_gpio.h> +#include <linux/spi/ads7846.h> #include <asm/mach-au1x00/au1000.h> #include <asm/mach-au1x00/au1000_dma.h> #include <asm/mach-au1x00/au1100_mmc.h> @@ -424,6 +427,43 @@ static struct platform_device db1000_irda_dev = { .num_resources = ARRAY_SIZE(au1000_irda_res), }; +/******************************************************************************/ + +static struct ads7846_platform_data db1100_touch_pd = { + .model = 7846, + .vref_mv = 3300, + .gpio_pendown = 21, +}; + +static struct spi_gpio_platform_data db1100_spictl_pd = { + .sck = 209, + .mosi = 208, + .miso = 207, + .num_chipselect = 1, +}; + +static struct spi_board_info db1100_spi_info[] __initdata = { + [0] = { + .modalias = "ads7846", + .max_speed_hz = 3250000, + .bus_num = 0, + .chip_select = 0, + .mode = 0, + .irq = AU1100_GPIO21_INT, + .platform_data = &db1100_touch_pd, + .controller_data = (void *)210, /* for spi_gpio: CS# GPIO210 */ + }, +}; + +static struct platform_device db1100_spi_dev = { + .name = "spi_gpio", + .id = 0, + .dev = { + .platform_data = &db1100_spictl_pd, + }, +}; + + static struct platform_device *db1x00_devs[] = { &db1x00_codec_dev, &alchemy_ac97c_dma_dev, @@ -440,12 +480,14 @@ static struct platform_device *db1100_devs[] = { &db1100_mmc0_dev, &db1100_mmc1_dev, &db1000_irda_dev, + &db1100_spi_dev, }; static int __init db1000_dev_init(void) { int board = BCSR_WHOAMI_BOARD(bcsr_read(BCSR_WHOAMI)); int c0, c1, d0, d1, s0, s1; + unsigned long pfc; if (board == BCSR_WHOAMI_DB1500) { c0 = AU1500_GPIO2_INT; @@ -464,6 +506,20 @@ static int __init db1000_dev_init(void) gpio_direction_input(19); /* sd0 cd# */ gpio_direction_input(20); /* sd1 cd# */ + gpio_direction_input(21); /* touch pendown# */ + gpio_direction_input(207); /* SPI MISO */ + gpio_direction_output(208, 0); /* SPI MOSI */ + gpio_direction_output(209, 1); /* SPI SCK */ + gpio_direction_output(210, 1); /* SPI CS# */ + + /* spi_gpio on SSI0 pins */ + pfc = __raw_readl((void __iomem *)SYS_PINFUNC); + pfc |= (1 << 0); /* SSI0 pins as GPIOs */ + __raw_writel(pfc, (void __iomem *)SYS_PINFUNC); + wmb(); + + spi_register_board_info(db1100_spi_info, + ARRAY_SIZE(db1100_spi_info)); platform_add_devices(db1100_devs, ARRAY_SIZE(db1100_devs)); } else if (board == BCSR_WHOAMI_DB1000) { |