diff options
Diffstat (limited to 'drivers/input/touchscreen/ads7846.c')
| -rw-r--r-- | drivers/input/touchscreen/ads7846.c | 28 |
1 files changed, 27 insertions, 1 deletions
diff --git a/drivers/input/touchscreen/ads7846.c b/drivers/input/touchscreen/ads7846.c index 52d2ca147d8..8b05d8e9754 100644 --- a/drivers/input/touchscreen/ads7846.c +++ b/drivers/input/touchscreen/ads7846.c @@ -27,6 +27,7 @@ #include <linux/gpio.h> #include <linux/spi/spi.h> #include <linux/spi/ads7846.h> +#include <linux/regulator/consumer.h> #include <asm/irq.h> /* @@ -85,6 +86,7 @@ struct ads7846 { char name[32]; struct spi_device *spi; + struct regulator *reg; #if defined(CONFIG_HWMON) || defined(CONFIG_HWMON_MODULE) struct attribute_group *attr_group; @@ -788,6 +790,8 @@ static void ads7846_disable(struct ads7846 *ts) } } + regulator_disable(ts->reg); + /* we know the chip's in lowpower mode since we always * leave it that way after every request */ @@ -799,6 +803,8 @@ static void ads7846_enable(struct ads7846 *ts) if (!ts->disabled) return; + regulator_enable(ts->reg); + ts->disabled = 0; ts->irq_disabled = 0; enable_irq(ts->spi->irq); @@ -1139,6 +1145,19 @@ static int __devinit ads7846_probe(struct spi_device *spi) ts->last_msg = m; + ts->reg = regulator_get(&spi->dev, "vcc"); + if (IS_ERR(ts->reg)) { + dev_err(&spi->dev, "unable to get regulator: %ld\n", + PTR_ERR(ts->reg)); + goto err_free_gpio; + } + + err = regulator_enable(ts->reg); + if (err) { + dev_err(&spi->dev, "unable to enable regulator: %d\n", err); + goto err_put_regulator; + } + if (request_irq(spi->irq, ads7846_irq, IRQF_TRIGGER_FALLING, spi->dev.driver->name, ts)) { dev_info(&spi->dev, @@ -1148,7 +1167,7 @@ static int __devinit ads7846_probe(struct spi_device *spi) spi->dev.driver->name, ts); if (err) { dev_dbg(&spi->dev, "irq %d busy?\n", spi->irq); - goto err_free_gpio; + goto err_disable_regulator; } } @@ -1180,6 +1199,10 @@ static int __devinit ads7846_probe(struct spi_device *spi) ads784x_hwmon_unregister(spi, ts); err_free_irq: free_irq(spi->irq, ts); + err_disable_regulator: + regulator_disable(ts->reg); + err_put_regulator: + regulator_put(ts->reg); err_free_gpio: if (ts->gpio_pendown != -1) gpio_free(ts->gpio_pendown); @@ -1208,6 +1231,9 @@ static int __devexit ads7846_remove(struct spi_device *spi) /* suspend left the IRQ disabled */ enable_irq(ts->spi->irq); + regulator_disable(ts->reg); + regulator_put(ts->reg); + if (ts->gpio_pendown != -1) gpio_free(ts->gpio_pendown); |