Wire up the ADS7846 touchscreen controller on the DB1100.
Signed-off-by: Manuel Lauss <manuel.lauss@xxxxxxxxxxxxxx>
---
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 f62b180..e110f6d 100644
--- a/arch/mips/alchemy/devboards/db1000.c
+++ b/arch/mips/alchemy/devboards/db1000.c
@@ -27,6 +27,9 @@
#include <linux/mmc/host.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>
@@ -423,6 +426,43 @@ 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,
@@ -439,12 +479,14 @@ 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;
@@ -463,6 +505,20 @@ 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) {
--
1.7.7.1
