diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/hwmon/adc128d818.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/hwmon/adc128d818.c b/drivers/hwmon/adc128d818.c index ad2b47e40345..2b61936c32ff 100644 --- a/drivers/hwmon/adc128d818.c +++ b/drivers/hwmon/adc128d818.c @@ -28,6 +28,7 @@ #include <linux/regulator/consumer.h> #include <linux/mutex.h> #include <linux/bitops.h> +#include <linux/of.h> /* Addresses to scan * The chip also supports addresses 0x35..0x37. Don't scan those addresses @@ -63,6 +64,7 @@ struct adc128_data { struct regulator *regulator; int vref; /* Reference voltage in mV */ struct mutex update_lock; + u8 mode; /* Operation mode */ bool valid; /* true if following fields are valid */ unsigned long last_updated; /* In jiffies */ @@ -387,6 +389,15 @@ static int adc128_init_client(struct adc128_data *data) if (err) return err; + /* Set operation mode, if non-default */ + if (data->mode != 0) { + err = i2c_smbus_write_byte_data(client, + ADC128_REG_CONFIG_ADV, + data->mode << 1); + if (err) + return err; + } + /* Start monitoring */ err = i2c_smbus_write_byte_data(client, ADC128_REG_CONFIG, 0x01); if (err) @@ -433,6 +444,19 @@ static int adc128_probe(struct i2c_client *client, data->vref = 2560; /* 2.56V, in mV */ } + /* Operation mode is optional and defaults to mode 0 */ + if (of_property_read_u8(dev->of_node, "ti,mode", &data->mode) == 0) { + /* Currently only mode 0 supported */ + if (data->mode != 0) { + dev_err(dev, "unsupported operation mode %d\n", + data->mode); + err = -EINVAL; + goto error; + } + } else { + data->mode = 0; + } + data->client = client; i2c_set_clientdata(client, data); mutex_init(&data->update_lock); |