@@ -77,9 +77,6 @@ static struct i2c_board_info __initdata mop500_i2c0_devices_stuib[] = {
* 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
@@ -88,73 +85,8 @@ static int bu21013_devices;
#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),
+ .touch_pin = TOUCH_GPIO_PIN,
.touch_x_max = TOUCH_XMAX,
.touch_y_max = TOUCH_YMAX,
.ext_clk = false,
@@ -14,6 +14,10 @@
#include <linux/slab.h>
#include <linux/regulator/consumer.h>
#include <linux/module.h>
+#include <linux/gpio.h>
+
+/* Reference tracking for multiple displays. */
+static int bu21013_devices = 0;
#define PEN_DOWN_INTR 0
#define MAX_FINGERS 2
@@ -262,7 +266,7 @@ static irqreturn_t bu21013_gpio_irq(int irq, void *device_data)
return IRQ_NONE;
}
- data->intr_pin = data->chip->irq_read_val();
+ data->intr_pin = gpio_get_value(data->chip->touch_pin);
if (data->intr_pin == PEN_DOWN_INTR)
wait_event_timeout(data->wait, data->touch_stopped,
msecs_to_jiffies(2));
@@ -272,6 +276,60 @@ static irqreturn_t bu21013_gpio_irq(int irq, void *device_data)
}
/**
+ * bu21013_gpio_board_init() - configures the touch panel
+ * @reset_pin: reset pin number
+ *
+ * This function is used to configure 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 is used to deconfigure 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_init_chip() - power on sequence for the bu21013 controller
* @data: device structure pointer
*
@@ -449,6 +507,8 @@ static int __devinit bu21013_probe(struct i2c_client *client,
return -EINVAL;
}
+ pdata->irq = gpio_to_irq(pdata->touch_pin);
+
bu21013_data = kzalloc(sizeof(struct bu21013_ts_data), GFP_KERNEL);
in_dev = input_allocate_device();
if (!bu21013_data || !in_dev) {
@@ -478,12 +538,10 @@ static int __devinit bu21013_probe(struct i2c_client *client,
init_waitqueue_head(&bu21013_data->wait);
/* configure the gpio pins */
- if (pdata->cs_en) {
- error = pdata->cs_en(pdata->cs_pin);
- if (error < 0) {
- dev_err(&client->dev, "chip init failed\n");
- goto err_disable_regulator;
- }
+ error = bu21013_gpio_board_init(pdata->cs_pin);
+ if (error < 0) {
+ dev_err(&client->dev, "chip init failed\n");
+ goto err_disable_regulator;
}
/* configure the touch panel controller */
@@ -531,7 +589,7 @@ static int __devinit bu21013_probe(struct i2c_client *client,
err_free_irq:
bu21013_free_irq(bu21013_data);
err_cs_disable:
- pdata->cs_dis(pdata->cs_pin);
+ bu21013_gpio_board_exit(pdata->cs_pin);
err_disable_regulator:
regulator_disable(bu21013_data->regulator);
err_put_regulator:
@@ -555,7 +613,7 @@ static int __devexit bu21013_remove(struct i2c_client *client)
bu21013_free_irq(bu21013_data);
- bu21013_data->chip->cs_dis(bu21013_data->chip->cs_pin);
+ bu21013_gpio_board_exit(bu21013_data->chip->cs_pin);
input_unregister_device(bu21013_data->in_dev);
@@ -9,13 +9,11 @@
/**
* struct bu21013_platform_device - Handle the platform data
- * @cs_en: pointer to the cs enable function
- * @cs_dis: pointer to the cs disable function
- * @irq_read_val: pointer to read the pen irq value function
* @touch_x_max: touch x max
* @touch_y_max: touch y max
* @cs_pin: chip select pin
* @irq: irq pin
+ * @touch_pin: touch gpio pin
* @ext_clk: external clock flag
* @x_flip: x flip flag
* @y_flip: y flip flag
@@ -24,13 +22,11 @@
* This is used to handle the platform data
*/
struct bu21013_platform_device {
- int (*cs_en)(int reset_pin);
- int (*cs_dis)(int reset_pin);
- int (*irq_read_val)(void);
int touch_x_max;
int touch_y_max;
unsigned int cs_pin;
unsigned int irq;
+ unsigned int touch_pin;
bool ext_clk;
bool x_flip;
bool y_flip;