diff options
Diffstat (limited to 'drivers/input/touchscreen/st1232.c')
| -rw-r--r-- | drivers/input/touchscreen/st1232.c | 89 |
1 files changed, 60 insertions, 29 deletions
diff --git a/drivers/input/touchscreen/st1232.c b/drivers/input/touchscreen/st1232.c index 6cb68a1981b..3c0f57efe7b 100644 --- a/drivers/input/touchscreen/st1232.c +++ b/drivers/input/touchscreen/st1232.c @@ -19,13 +19,17 @@ */ #include <linux/delay.h> +#include <linux/gpio.h> #include <linux/i2c.h> #include <linux/input.h> #include <linux/interrupt.h> #include <linux/module.h> +#include <linux/of.h> +#include <linux/of_gpio.h> #include <linux/pm_qos.h> #include <linux/slab.h> #include <linux/types.h> +#include <linux/platform_data/st1232_pdata.h> #define ST1232_TS_NAME "st1232-ts" @@ -48,6 +52,7 @@ struct st1232_ts_data { struct input_dev *input_dev; struct st1232_ts_finger finger[MAX_FINGERS]; struct dev_pm_qos_request low_latency_req; + int reset_gpio; }; static int st1232_ts_read_data(struct st1232_ts_data *ts) @@ -129,7 +134,8 @@ static irqreturn_t st1232_ts_irq_handler(int irq, void *dev_id) } else if (!ts->low_latency_req.dev) { /* First contact, request 100 us latency. */ dev_pm_qos_add_ancestor_request(&ts->client->dev, - &ts->low_latency_req, 100); + &ts->low_latency_req, + DEV_PM_QOS_RESUME_LATENCY, 100); } /* SYN_REPORT */ @@ -139,10 +145,17 @@ end: return IRQ_HANDLED; } -static int __devinit st1232_ts_probe(struct i2c_client *client, +static void st1232_ts_power(struct st1232_ts_data *ts, bool poweron) +{ + if (gpio_is_valid(ts->reset_gpio)) + gpio_direction_output(ts->reset_gpio, poweron); +} + +static int st1232_ts_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct st1232_ts_data *ts; + struct st1232_pdata *pdata = dev_get_platdata(&client->dev); struct input_dev *input_dev; int error; @@ -156,17 +169,36 @@ static int __devinit st1232_ts_probe(struct i2c_client *client, return -EINVAL; } + ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL); + if (!ts) + return -ENOMEM; - ts = kzalloc(sizeof(struct st1232_ts_data), GFP_KERNEL); - input_dev = input_allocate_device(); - if (!ts || !input_dev) { - error = -ENOMEM; - goto err_free_mem; - } + input_dev = devm_input_allocate_device(&client->dev); + if (!input_dev) + return -ENOMEM; ts->client = client; ts->input_dev = input_dev; + if (pdata) + ts->reset_gpio = pdata->reset_gpio; + else if (client->dev.of_node) + ts->reset_gpio = of_get_gpio(client->dev.of_node, 0); + else + ts->reset_gpio = -ENODEV; + + if (gpio_is_valid(ts->reset_gpio)) { + error = devm_gpio_request(&client->dev, ts->reset_gpio, NULL); + if (error) { + dev_err(&client->dev, + "Unable to request GPIO pin %d.\n", + ts->reset_gpio); + return error; + } + } + + st1232_ts_power(ts, true); + input_dev->name = "st1232-touchscreen"; input_dev->id.bustype = BUS_I2C; input_dev->dev.parent = &client->dev; @@ -179,41 +211,34 @@ static int __devinit st1232_ts_probe(struct i2c_client *client, input_set_abs_params(input_dev, ABS_MT_POSITION_X, MIN_X, MAX_X, 0, 0); input_set_abs_params(input_dev, ABS_MT_POSITION_Y, MIN_Y, MAX_Y, 0, 0); - error = request_threaded_irq(client->irq, NULL, st1232_ts_irq_handler, - IRQF_ONESHOT, client->name, ts); + error = devm_request_threaded_irq(&client->dev, client->irq, + NULL, st1232_ts_irq_handler, + IRQF_ONESHOT, + client->name, ts); if (error) { dev_err(&client->dev, "Failed to register interrupt\n"); - goto err_free_mem; + return error; } error = input_register_device(ts->input_dev); if (error) { dev_err(&client->dev, "Unable to register %s input device\n", input_dev->name); - goto err_free_irq; + return error; } i2c_set_clientdata(client, ts); device_init_wakeup(&client->dev, 1); return 0; - -err_free_irq: - free_irq(client->irq, ts); -err_free_mem: - input_free_device(input_dev); - kfree(ts); - return error; } -static int __devexit st1232_ts_remove(struct i2c_client *client) +static int st1232_ts_remove(struct i2c_client *client) { struct st1232_ts_data *ts = i2c_get_clientdata(client); device_init_wakeup(&client->dev, 0); - free_irq(client->irq, ts); - input_unregister_device(ts->input_dev); - kfree(ts); + st1232_ts_power(ts, false); return 0; } @@ -222,11 +247,14 @@ static int __devexit st1232_ts_remove(struct i2c_client *client) static int st1232_ts_suspend(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); + struct st1232_ts_data *ts = i2c_get_clientdata(client); - if (device_may_wakeup(&client->dev)) + if (device_may_wakeup(&client->dev)) { enable_irq_wake(client->irq); - else + } else { disable_irq(client->irq); + st1232_ts_power(ts, false); + } return 0; } @@ -234,11 +262,14 @@ static int st1232_ts_suspend(struct device *dev) static int st1232_ts_resume(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); + struct st1232_ts_data *ts = i2c_get_clientdata(client); - if (device_may_wakeup(&client->dev)) + if (device_may_wakeup(&client->dev)) { disable_irq_wake(client->irq); - else + } else { + st1232_ts_power(ts, true); enable_irq(client->irq); + } return 0; } @@ -255,7 +286,7 @@ static const struct i2c_device_id st1232_ts_id[] = { MODULE_DEVICE_TABLE(i2c, st1232_ts_id); #ifdef CONFIG_OF -static const struct of_device_id st1232_ts_dt_ids[] __devinitconst = { +static const struct of_device_id st1232_ts_dt_ids[] = { { .compatible = "sitronix,st1232", }, { } }; @@ -264,7 +295,7 @@ MODULE_DEVICE_TABLE(of, st1232_ts_dt_ids); static struct i2c_driver st1232_ts_driver = { .probe = st1232_ts_probe, - .remove = __devexit_p(st1232_ts_remove), + .remove = st1232_ts_remove, .id_table = st1232_ts_id, .driver = { .name = ST1232_TS_NAME, |