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| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-08-20 20:42:41 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-08-20 20:42:41 +0300 |
| commit | 5c40cd7db64a2949f268d7467b9be551a565d14b (patch) | |
| tree | fb8a67f6edcb0c9922c256a598d675c1c04051d6 /drivers/iio/light/bh1750.c | |
| parent | 8bde384a2090759efc9b92f34300887d418a2a3a (diff) | |
| parent | 25bf10be219d37d2fb221c93816a913f5f735530 (diff) | |
| download | linux-rolling-stable.tar.xz | |
Merge v6.16.2linux-rolling-stable
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/iio/light/bh1750.c')
| -rw-r--r-- | drivers/iio/light/bh1750.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/iio/light/bh1750.c b/drivers/iio/light/bh1750.c index 4b869fa9e5b1..764f88826fcb 100644 --- a/drivers/iio/light/bh1750.c +++ b/drivers/iio/light/bh1750.c @@ -22,12 +22,16 @@ #include <linux/iio/iio.h> #include <linux/iio/sysfs.h> #include <linux/module.h> +#include <linux/gpio/consumer.h> #define BH1750_POWER_DOWN 0x00 #define BH1750_ONE_TIME_H_RES_MODE 0x20 /* auto-mode for BH1721 */ #define BH1750_CHANGE_INT_TIME_H_BIT 0x40 #define BH1750_CHANGE_INT_TIME_L_BIT 0x60 +/* Define the reset delay time in microseconds */ +#define BH1750_RESET_DELAY_US 10000 /* 10ms */ + enum { BH1710, BH1721, @@ -40,6 +44,7 @@ struct bh1750_data { struct mutex lock; const struct bh1750_chip_info *chip_info; u16 mtreg; + struct gpio_desc *reset_gpio; }; struct bh1750_chip_info { @@ -248,6 +253,25 @@ static int bh1750_probe(struct i2c_client *client) data->client = client; data->chip_info = &bh1750_chip_info_tbl[id->driver_data]; + /* Get reset GPIO from device tree */ + data->reset_gpio = devm_gpiod_get_optional(&client->dev, + "reset", GPIOD_OUT_HIGH); + + if (IS_ERR(data->reset_gpio)) + return dev_err_probe(&client->dev, PTR_ERR(data->reset_gpio), + "Failed to get reset GPIO\n"); + + /* Perform hardware reset if GPIO is provided */ + if (data->reset_gpio) { + /* Perform reset sequence: low-high */ + gpiod_set_value_cansleep(data->reset_gpio, 1); + fsleep(BH1750_RESET_DELAY_US); + gpiod_set_value_cansleep(data->reset_gpio, 0); + fsleep(BH1750_RESET_DELAY_US); + + dev_dbg(&client->dev, "BH1750 reset completed via GPIO\n"); + } + usec = data->chip_info->mtreg_to_usec * data->chip_info->mtreg_default; ret = bh1750_change_int_time(data, usec); if (ret < 0) |