diff options
Diffstat (limited to 'drivers/media/i2c/tvp5150.c')
| -rw-r--r-- | drivers/media/i2c/tvp5150.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/drivers/media/i2c/tvp5150.c b/drivers/media/i2c/tvp5150.c index e6ce197d8dbc..6f4b0f83973e 100644 --- a/drivers/media/i2c/tvp5150.c +++ b/drivers/media/i2c/tvp5150.c @@ -9,6 +9,7 @@ #include <linux/slab.h> #include <linux/videodev2.h> #include <linux/delay.h> +#include <linux/gpio/consumer.h> #include <linux/module.h> #include <media/v4l2-async.h> #include <media/v4l2-device.h> @@ -1175,6 +1176,36 @@ static int tvp5150_detect_version(struct tvp5150 *core) return 0; } +static int tvp5150_init(struct i2c_client *c) +{ + struct gpio_desc *pdn_gpio; + struct gpio_desc *reset_gpio; + + pdn_gpio = devm_gpiod_get_optional(&c->dev, "pdn", GPIOD_OUT_HIGH); + if (IS_ERR(pdn_gpio)) + return PTR_ERR(pdn_gpio); + + if (pdn_gpio) { + gpiod_set_value_cansleep(pdn_gpio, 0); + /* Delay time between power supplies active and reset */ + msleep(20); + } + + reset_gpio = devm_gpiod_get_optional(&c->dev, "reset", GPIOD_OUT_HIGH); + if (IS_ERR(reset_gpio)) + return PTR_ERR(reset_gpio); + + if (reset_gpio) { + /* RESETB pulse duration */ + ndelay(500); + gpiod_set_value_cansleep(reset_gpio, 0); + /* Delay time between end of reset to I2C active */ + usleep_range(200, 250); + } + + return 0; +} + static int tvp5150_probe(struct i2c_client *c, const struct i2c_device_id *id) { @@ -1187,6 +1218,10 @@ static int tvp5150_probe(struct i2c_client *c, I2C_FUNC_SMBUS_READ_BYTE | I2C_FUNC_SMBUS_WRITE_BYTE_DATA)) return -EIO; + res = tvp5150_init(c); + if (res) + return res; + core = devm_kzalloc(&c->dev, sizeof(*core), GFP_KERNEL); if (!core) return -ENOMEM; |