mach-ux500: add ST-UIB platform data

The ST-UIB contains a matrix keypad interfaced with the
STMPE1601 port expander and a ROHM BU2101 touch panel.

Signed-off-by: Sundar Iyer <sundar.iyer@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

2 files changed, 184 insertions, 0 deletions

diff --git a/arch/arm/mach-ux500/board-mop500-stuib.c b/arch/arm/mach-ux500/board-mop500-stuib.c
index 7fa30217cc01..8b6323e229ff 100644
--- a/arch/arm/mach-ux500/board-mop500-stuib.c
+++ b/arch/arm/mach-ux500/board-mop500-stuib.c
@@ -6,9 +6,192 @@
 
 #include <linux/kernel.h>
 #include <linux/init.h>
+#include <linux/mfd/stmpe.h>
+#include <linux/input/bu21013.h>
+#include <linux/gpio.h>
+#include <linux/interrupt.h>
+#include <linux/i2c.h>
+#include <linux/input/matrix_keypad.h>
 
 #include "board-mop500.h"
 
+/* STMPE/SKE keypad use this key layout */
+static const unsigned int mop500_keymap[] = {
+	KEY(2, 5, KEY_END),
+	KEY(4, 1, KEY_POWER),
+	KEY(3, 5, KEY_VOLUMEDOWN),
+	KEY(1, 3, KEY_3),
+	KEY(5, 2, KEY_RIGHT),
+	KEY(5, 0, KEY_9),
+
+	KEY(0, 5, KEY_MENU),
+	KEY(7, 6, KEY_ENTER),
+	KEY(4, 5, KEY_0),
+	KEY(6, 7, KEY_2),
+	KEY(3, 4, KEY_UP),
+	KEY(3, 3, KEY_DOWN),
+
+	KEY(6, 4, KEY_SEND),
+	KEY(6, 2, KEY_BACK),
+	KEY(4, 2, KEY_VOLUMEUP),
+	KEY(5, 5, KEY_1),
+	KEY(4, 3, KEY_LEFT),
+	KEY(3, 2, KEY_7),
+};
+
+static const struct matrix_keymap_data mop500_keymap_data = {
+	.keymap		= mop500_keymap,
+	.keymap_size    = ARRAY_SIZE(mop500_keymap),
+};
+/*
+ * STMPE1601
+ */
+static struct stmpe_keypad_platform_data stmpe1601_keypad_data = {
+	.debounce_ms    = 64,
+	.scan_count     = 8,
+	.no_autorepeat  = true,
+	.keymap_data    = &mop500_keymap_data,
+};
+
+static struct stmpe_platform_data stmpe1601_data = {
+	.id		= 1,
+	.blocks		= STMPE_BLOCK_KEYPAD,
+	.irq_trigger    = IRQF_TRIGGER_FALLING,
+	.irq_base       = MOP500_STMPE1601_IRQ(0),
+	.keypad		= &stmpe1601_keypad_data,
+	.autosleep      = true,
+	.autosleep_timeout = 1024,
+};
+
+static struct i2c_board_info __initdata mop500_i2c0_devices_stuib[] = {
+	{
+		I2C_BOARD_INFO("stmpe1601", 0x40),
+		.irq = NOMADIK_GPIO_TO_IRQ(218),
+		.platform_data = &stmpe1601_data,
+		.flags = I2C_CLIENT_WAKE,
+	},
+};
+
+/*
+ * BU21013 ROHM touchscreen interface on the STUIBs
+ */
+
+/* tracks number of bu21013 devices being enabled */
+static int bu21013_devices;
+
+#define TOUCH_GPIO_PIN  84
+
+#define TOUCH_XMAX	384
+#define TOUCH_YMAX	704
+
+#define PRCMU_CLOCK_OCR		0x1CC
+#define TSC_EXT_CLOCK_9_6MHZ	0x840000
+
+/**
+ * bu21013_gpio_board_init : configures the touch panel.
+ * @reset_pin: reset pin number
+ * This function can be used to configures
+ * the voltage and reset the touch panel controller.
+ */
+static int bu21013_gpio_board_init(int reset_pin)
+{
+	int retval = 0;
+
+	bu21013_devices++;
+	if (bu21013_devices == 1) {
+		retval = gpio_request(reset_pin, "touchp_reset");
+		if (retval) {
+			printk(KERN_ERR "Unable to request gpio reset_pin");
+			return retval;
+		}
+		retval = gpio_direction_output(reset_pin, 1);
+		if (retval < 0) {
+			printk(KERN_ERR "%s: gpio direction failed\n",
+					__func__);
+			return retval;
+		}
+	}
+
+	return retval;
+}
+
+/**
+ * bu21013_gpio_board_exit : deconfigures the touch panel controller
+ * @reset_pin: reset pin number
+ * This function can be used to deconfigures the chip selection
+ * for touch panel controller.
+ */
+static int bu21013_gpio_board_exit(int reset_pin)
+{
+	int retval = 0;
+
+	if (bu21013_devices == 1) {
+		retval = gpio_direction_output(reset_pin, 0);
+		if (retval < 0) {
+			printk(KERN_ERR "%s: gpio direction failed\n",
+					__func__);
+			return retval;
+		}
+		gpio_set_value(reset_pin, 0);
+	}
+	bu21013_devices--;
+
+	return retval;
+}
+
+/**
+ * bu21013_read_pin_val : get the interrupt pin value
+ * This function can be used to get the interrupt pin value for touch panel
+ * controller.
+ */
+static int bu21013_read_pin_val(void)
+{
+	return gpio_get_value(TOUCH_GPIO_PIN);
+}
+
+static struct bu21013_platform_device tsc_plat_device = {
+	.cs_en = bu21013_gpio_board_init,
+	.cs_dis = bu21013_gpio_board_exit,
+	.irq_read_val = bu21013_read_pin_val,
+	.irq = NOMADIK_GPIO_TO_IRQ(TOUCH_GPIO_PIN),
+	.cs_pin = GPIO_BU21013_CS,
+	.touch_x_max = TOUCH_XMAX,
+	.touch_y_max = TOUCH_YMAX,
+	.ext_clk = false,
+	.x_flip = false,
+	.y_flip = true,
+};
+
+static struct bu21013_platform_device tsc_plat2_device = {
+	.cs_en = bu21013_gpio_board_init,
+	.cs_dis = bu21013_gpio_board_exit,
+	.irq_read_val = bu21013_read_pin_val,
+	.irq = NOMADIK_GPIO_TO_IRQ(TOUCH_GPIO_PIN),
+	.cs_pin = GPIO_BU21013_CS,
+	.touch_x_max = TOUCH_XMAX,
+	.touch_y_max = TOUCH_YMAX,
+	.ext_clk = false,
+	.x_flip = false,
+	.y_flip = true,
+};
+
+static struct i2c_board_info __initdata u8500_i2c3_devices_stuib[] = {
+	{
+		I2C_BOARD_INFO("bu21013_tp", 0x5C),
+		.platform_data = &tsc_plat_device,
+	},
+	{
+		I2C_BOARD_INFO("bu21013_tp", 0x5D),
+		.platform_data = &tsc_plat2_device,
+	},
+
+};
+
 void __init mop500_stuib_init(void)
 {
+	mop500_uib_i2c_add(0, mop500_i2c0_devices_stuib,
+			ARRAY_SIZE(mop500_i2c0_devices_stuib));
+
+	mop500_uib_i2c_add(3, u8500_i2c3_devices_stuib,
+			ARRAY_SIZE(u8500_i2c3_devices_stuib));
 }
diff --git a/arch/arm/mach-ux500/board-mop500.h b/arch/arm/mach-ux500/board-mop500.h
index cedf8ebaad95..fe22b84f89ea 100644
--- a/arch/arm/mach-ux500/board-mop500.h
+++ b/arch/arm/mach-ux500/board-mop500.h
@@ -11,6 +11,7 @@
 
 /* GPIOs on the TC35892 expander */
 #define GPIO_SDMMC_CD			MOP500_EGPIO(3)
+#define GPIO_BU21013_CS			MOP500_EGPIO(13)
 #define GPIO_SDMMC_EN			MOP500_EGPIO(17)
 #define GPIO_SDMMC_1V8_3V_SEL		MOP500_EGPIO(18)