Input: adp5588-keys - export unused GPIO pins (ba9f507a) · Commits · e / devices / android_kernel_teracube_mt6765

drivers/input/keyboard/adp5588-keys.c

+207 −2

Original line number	Original line	Diff line number	Diff line
	@@ -19,6 +19,7 @@
	#include <linux/platform_device.h>		#include <linux/platform_device.h>
	#include <linux/input.h>		#include <linux/input.h>
	#include <linux/i2c.h>		#include <linux/i2c.h>
			#include <linux/gpio.h>
	#include <linux/slab.h>		#include <linux/slab.h>

	#include <linux/i2c/adp5588.h>		#include <linux/i2c/adp5588.h>
	@@ -54,6 +55,10 @@

	#define KEYP_MAX_EVENT 10		#define KEYP_MAX_EVENT 10

			#define MAXGPIO 18
			#define ADP_BANK(offs) ((offs) >> 3)
			#define ADP_BIT(offs) (1u << ((offs) & 0x7))

	/*		/*
	* Early pre 4.0 Silicon required to delay readout by at least 25ms,		* Early pre 4.0 Silicon required to delay readout by at least 25ms,
	* since the Event Counter Register updated 25ms after the interrupt		* since the Event Counter Register updated 25ms after the interrupt
	@@ -69,6 +74,14 @@ struct adp5588_kpad {
	unsigned short keycode[ADP5588_KEYMAPSIZE];		unsigned short keycode[ADP5588_KEYMAPSIZE];
	const struct adp5588_gpi_map *gpimap;		const struct adp5588_gpi_map *gpimap;
	unsigned short gpimapsize;		unsigned short gpimapsize;
			#ifdef CONFIG_GPIOLIB
			unsigned char gpiomap[MAXGPIO];
			bool export_gpio;
			struct gpio_chip gc;
			struct mutex gpio_lock; /* Protect cached dir, dat_out */
			u8 dat_out[3];
			u8 dir[3];
			#endif
	};		};

	static int adp5588_read(struct i2c_client *client, u8 reg)		static int adp5588_read(struct i2c_client *client, u8 reg)
	@@ -86,6 +99,183 @@ static int adp5588_write(struct i2c_client *client, u8 reg, u8 val)
	return i2c_smbus_write_byte_data(client, reg, val);		return i2c_smbus_write_byte_data(client, reg, val);
	}		}

			#ifdef CONFIG_GPIOLIB
			static int adp5588_gpio_get_value(struct gpio_chip *chip, unsigned off)
			{
			struct adp5588_kpad *kpad = container_of(chip, struct adp5588_kpad, gc);
			unsigned int bank = ADP_BANK(kpad->gpiomap[off]);
			unsigned int bit = ADP_BIT(kpad->gpiomap[off]);

			return !!(adp5588_read(kpad->client, GPIO_DAT_STAT1 + bank) & bit);
			}

			static void adp5588_gpio_set_value(struct gpio_chip *chip,
			unsigned off, int val)
			{
			struct adp5588_kpad *kpad = container_of(chip, struct adp5588_kpad, gc);
			unsigned int bank = ADP_BANK(kpad->gpiomap[off]);
			unsigned int bit = ADP_BIT(kpad->gpiomap[off]);

			mutex_lock(&kpad->gpio_lock);

			if (val)
			kpad->dat_out[bank] \|= bit;
			else
			kpad->dat_out[bank] &= ~bit;

			adp5588_write(kpad->client, GPIO_DAT_OUT1 + bank,
			kpad->dat_out[bank]);

			mutex_unlock(&kpad->gpio_lock);
			}

			static int adp5588_gpio_direction_input(struct gpio_chip *chip, unsigned off)
			{
			struct adp5588_kpad *kpad = container_of(chip, struct adp5588_kpad, gc);
			unsigned int bank = ADP_BANK(kpad->gpiomap[off]);
			unsigned int bit = ADP_BIT(kpad->gpiomap[off]);
			int ret;

			mutex_lock(&kpad->gpio_lock);

			kpad->dir[bank] &= ~bit;
			ret = adp5588_write(kpad->client, GPIO_DIR1 + bank, kpad->dir[bank]);

			mutex_unlock(&kpad->gpio_lock);

			return ret;
			}

			static int adp5588_gpio_direction_output(struct gpio_chip *chip,
			unsigned off, int val)
			{
			struct adp5588_kpad *kpad = container_of(chip, struct adp5588_kpad, gc);
			unsigned int bank = ADP_BANK(kpad->gpiomap[off]);
			unsigned int bit = ADP_BIT(kpad->gpiomap[off]);
			int ret;

			mutex_lock(&kpad->gpio_lock);

			kpad->dir[bank] \|= bit;

			if (val)
			kpad->dat_out[bank] \|= bit;
			else
			kpad->dat_out[bank] &= ~bit;

			ret = adp5588_write(kpad->client, GPIO_DAT_OUT1 + bank,
			kpad->dat_out[bank]);
			ret \|= adp5588_write(kpad->client, GPIO_DIR1 + bank,
			kpad->dir[bank]);

			mutex_unlock(&kpad->gpio_lock);

			return ret;
			}

			static int __devinit adp5588_gpio_add(struct device *dev)
			{
			struct adp5588_kpad *kpad = dev_get_drvdata(dev);
			const struct adp5588_kpad_platform_data *pdata = dev->platform_data;
			const struct adp5588_gpio_platform_data *gpio_data = pdata->gpio_data;
			int i, error;

			if (gpio_data) {
			int j = 0;
			bool pin_used[MAXGPIO];

			for (i = 0; i < pdata->rows; i++)
			pin_used[i] = true;

			for (i = 0; i < pdata->cols; i++)
			pin_used[i + GPI_PIN_COL_BASE - GPI_PIN_BASE] = true;

			for (i = 0; i < kpad->gpimapsize; i++)
			pin_used[kpad->gpimap[i].pin - GPI_PIN_BASE] = true;

			for (i = 0; i < MAXGPIO; i++) {
			if (!pin_used[i])
			kpad->gpiomap[j++] = i;
			}
			kpad->gc.ngpio = j;

			if (kpad->gc.ngpio)
			kpad->export_gpio = true;
			}

			if (!kpad->export_gpio) {
			dev_info(dev, "No unused gpios left to export\n");
			return 0;
			}

			kpad->gc.direction_input = adp5588_gpio_direction_input;
			kpad->gc.direction_output = adp5588_gpio_direction_output;
			kpad->gc.get = adp5588_gpio_get_value;
			kpad->gc.set = adp5588_gpio_set_value;
			kpad->gc.can_sleep = 1;

			kpad->gc.base = gpio_data->gpio_start;
			kpad->gc.label = kpad->client->name;
			kpad->gc.owner = THIS_MODULE;

			mutex_init(&kpad->gpio_lock);

			error = gpiochip_add(&kpad->gc);
			if (error) {
			dev_err(dev, "gpiochip_add failed, err: %d\n", error);
			return error;
			}

			for (i = 0; i <= ADP_BANK(MAXGPIO); i++) {
			kpad->dat_out[i] = adp5588_read(kpad->client,
			GPIO_DAT_OUT1 + i);
			kpad->dir[i] = adp5588_read(kpad->client, GPIO_DIR1 + i);
			}

			if (gpio_data->setup) {
			error = gpio_data->setup(kpad->client,
			kpad->gc.base, kpad->gc.ngpio,
			gpio_data->context);
			if (error)
			dev_warn(dev, "setup failed, %d\n", error);
			}

			return 0;
			}

			static void __devexit adp5588_gpio_remove(struct device *dev)
			{
			struct adp5588_kpad *kpad = dev_get_drvdata(dev);
			const struct adp5588_kpad_platform_data *pdata = dev->platform_data;
			const struct adp5588_gpio_platform_data *gpio_data = pdata->gpio_data;
			int error;

			if (!kpad->export_gpio)
			return;

			if (gpio_data->teardown) {
			error = gpio_data->teardown(kpad->client,
			kpad->gc.base, kpad->gc.ngpio,
			gpio_data->context);
			if (error)
			dev_warn(dev, "teardown failed %d\n", error);
			}

			error = gpiochip_remove(&kpad->gc);
			if (error)
			dev_warn(dev, "gpiochip_remove failed %d\n", error);
			}
			#else
			static inline int adp5588_gpio_add(struct device *dev)
			{
			return 0;
			}

			static inline void adp5588_gpio_remove(struct device *dev)
			{
			}
			#endif

	static void adp5588_report_events(struct adp5588_kpad *kpad, int ev_cnt)		static void adp5588_report_events(struct adp5588_kpad *kpad, int ev_cnt)
	{		{
	int i, j;		int i, j;
	@@ -150,7 +340,8 @@ static irqreturn_t adp5588_irq(int irq, void *handle)

	static int __devinit adp5588_setup(struct i2c_client *client)		static int __devinit adp5588_setup(struct i2c_client *client)
	{		{
	struct adp5588_kpad_platform_data *pdata = client->dev.platform_data;		const struct adp5588_kpad_platform_data *pdata = client->dev.platform_data;
			const struct adp5588_gpio_platform_data *gpio_data = pdata->gpio_data;
	int i, ret;		int i, ret;
	unsigned char evt_mode1 = 0, evt_mode2 = 0, evt_mode3 = 0;		unsigned char evt_mode1 = 0, evt_mode2 = 0, evt_mode3 = 0;

	@@ -184,6 +375,15 @@ static int __devinit adp5588_setup(struct i2c_client *client)
	ret \|= adp5588_write(client, GPI_EM3, evt_mode3);		ret \|= adp5588_write(client, GPI_EM3, evt_mode3);
	}		}

			if (gpio_data) {
			for (i = 0; i <= ADP_BANK(MAXGPIO); i++) {
			int pull_mask = gpio_data->pullup_dis_mask;

			ret \|= adp5588_write(client, GPIO_PULL1 + i,
			(pull_mask >> (8 * i)) & 0xFF);
			}
			}

	ret \|= adp5588_write(client, INT_STAT, CMP2_INT \| CMP1_INT \|		ret \|= adp5588_write(client, INT_STAT, CMP2_INT \| CMP1_INT \|
	OVR_FLOW_INT \| K_LCK_INT \|		OVR_FLOW_INT \| K_LCK_INT \|
	GPI_INT \| KE_INT); /* Status is W1C */		GPI_INT \| KE_INT); /* Status is W1C */
	@@ -240,7 +440,7 @@ static int __devinit adp5588_probe(struct i2c_client *client,
	const struct i2c_device_id *id)		const struct i2c_device_id *id)
	{		{
	struct adp5588_kpad *kpad;		struct adp5588_kpad *kpad;
	struct adp5588_kpad_platform_data *pdata = client->dev.platform_data;		const struct adp5588_kpad_platform_data *pdata = client->dev.platform_data;
	struct input_dev *input;		struct input_dev *input;
	unsigned int revid;		unsigned int revid;
	int ret, i;		int ret, i;
	@@ -381,6 +581,10 @@ static int __devinit adp5588_probe(struct i2c_client *client,
	if (kpad->gpimapsize)		if (kpad->gpimapsize)
	adp5588_report_switch_state(kpad);		adp5588_report_switch_state(kpad);

			error = adp5588_gpio_add(&client->dev);
			if (error)
			goto err_free_irq;

	device_init_wakeup(&client->dev, 1);		device_init_wakeup(&client->dev, 1);
	i2c_set_clientdata(client, kpad);		i2c_set_clientdata(client, kpad);

	@@ -407,6 +611,7 @@ static int __devexit adp5588_remove(struct i2c_client *client)
	free_irq(client->irq, kpad);		free_irq(client->irq, kpad);
	cancel_delayed_work_sync(&kpad->work);		cancel_delayed_work_sync(&kpad->work);
	input_unregister_device(kpad->input);		input_unregister_device(kpad->input);
			adp5588_gpio_remove(&client->dev);
	kfree(kpad);		kfree(kpad);

	return 0;		return 0;

include/linux/i2c/adp5588.h

+1 −0

Original line number	Original line	Diff line number	Diff line
	@@ -123,6 +123,7 @@ struct adp5588_kpad_platform_data {
	unsigned short unlock_key2; /* Unlock Key 2 */		unsigned short unlock_key2; /* Unlock Key 2 */
	const struct adp5588_gpi_map *gpimap;		const struct adp5588_gpi_map *gpimap;
	unsigned short gpimapsize;		unsigned short gpimapsize;
			const struct adp5588_gpio_platform_data *gpio_data;
	};		};

	struct adp5588_gpio_platform_data {		struct adp5588_gpio_platform_data {