Blackfin arch: AD7879 Touchscreen driver

Add AD7879 Touchscreen driver to the device structures

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>

1 files changed, 37 insertions, 3 deletions

diff --git a/arch/blackfin/mach-bf537/boards/stamp.c b/arch/blackfin/mach-bf537/boards/stamp.c
index ccfa08801840..dc5a30849c15 100644
--- a/arch/blackfin/mach-bf537/boards/stamp.c
+++ b/arch/blackfin/mach-bf537/boards/stamp.c
@@ -51,7 +51,6 @@
 #include <asm/reboot.h>
 #include <asm/portmux.h>
 #include <asm/dpmc.h>
-#include <linux/spi/ad7877.h>
 
 /*
  * Name the Board for the /proc/cpuinfo
@@ -555,6 +554,7 @@ static struct bfin5xx_spi_chip spi_si3xxx_chip_info = {
 #endif
 
 #if defined(CONFIG_TOUCHSCREEN_AD7877) || defined(CONFIG_TOUCHSCREEN_AD7877_MODULE)
+#include <linux/spi/ad7877.h>
 static struct bfin5xx_spi_chip spi_ad7877_chip_info = {
         .enable_dma = 0,
         .bits_per_word = 16,
@@ -575,6 +575,28 @@ static const struct ad7877_platform_data bfin_ad7877_ts_info = {
 };
 #endif
 
+#if defined(CONFIG_TOUCHSCREEN_AD7879) || defined(CONFIG_TOUCHSCREEN_AD7879_MODULE)
+#include <linux/spi/ad7879.h>
+static struct bfin5xx_spi_chip spi_ad7879_chip_info = {
+        .enable_dma = 0,
+        .bits_per_word = 16,
+};
+
+static const struct ad7879_platform_data bfin_ad7879_ts_info = {
+        .model                  = 7879, /* Model = AD7879 */
+        .x_plate_ohms           = 620,  /* 620 Ohm from the touch datasheet */
+        .pressure_max           = 10000,
+        .pressure_min           = 0,
+        .first_conversion_delay = 3,    /* wait 512us before do a first conversion */
+        .acquisition_time       = 1,    /* 4us acquisition time per sample */
+        .median                 = 2,    /* do 8 measurements */
+        .averaging              = 1,    /* take the average of 4 middle samples */
+        .pen_down_acc_interval  = 255,  /* 9.4 ms */
+        .gpio_output            = 1,    /* configure AUX/VBAT/GPIO as GPIO output */
+        .gpio_default           = 1,    /* During initialization set GPIO = HIGH */
+};
+#endif
+
 #if defined(CONFIG_SPI_SPIDEV) || defined(CONFIG_SPI_SPIDEV_MODULE)
 static struct bfin5xx_spi_chip spidev_chip_info = {
         .enable_dma = 0,
@@ -728,6 +750,18 @@ static struct spi_board_info bfin_spi_board_info[] __initdata = {
                 .controller_data = &spi_ad7877_chip_info,
         },
 #endif
+#if defined(CONFIG_TOUCHSCREEN_AD7879) || defined(CONFIG_TOUCHSCREEN_AD7879_MODULE)
+        {
+                .modalias = "ad7879",
+                .platform_data = &bfin_ad7879_ts_info,
+                .irq = IRQ_PF7,
+                .max_speed_hz = 5000000,     /* max spi clock (SCK) speed in HZ */
+                .bus_num = 0,
+                .chip_select = 1,
+                .controller_data = &spi_ad7879_chip_info,
+                .mode = SPI_CPHA | SPI_CPOL,
+        },
+#endif
 #if defined(CONFIG_SPI_SPIDEV) || defined(CONFIG_SPI_SPIDEV_MODULE)
         {
                 .modalias = "spidev",
@@ -742,7 +776,7 @@ static struct spi_board_info bfin_spi_board_info[] __initdata = {
                 .modalias = "bfin-lq035q1-spi",
                 .max_speed_hz = 20000000,     /* max spi clock (SCK) speed in HZ */
                 .bus_num = 0,
-                .chip_select = 1,
+                .chip_select = 2,
                 .controller_data = &lq035q1_spi_chip_info,
                 .mode = SPI_CPHA | SPI_CPOL,
         },
@@ -799,7 +833,7 @@ static struct platform_device bfin_fb_adv7393_device = {
 
 static struct bfin_lq035q1fb_disp_info bfin_lq035q1_data = {
         .mode =         LQ035_NORM | LQ035_RGB | LQ035_RL | LQ035_TB,
-        .use_bl =       1,
+        .use_bl =       0,      /* let something else control the LCD Blacklight */
         .gpio_bl =      GPIO_PF7,
 };