diff options
Diffstat (limited to 'drivers/hwmon/adt7475.c')
| -rw-r--r-- | drivers/hwmon/adt7475.c | 119 |
1 files changed, 106 insertions, 13 deletions
diff --git a/drivers/hwmon/adt7475.c b/drivers/hwmon/adt7475.c index 9d5b019651f2..ac480e6e4818 100644 --- a/drivers/hwmon/adt7475.c +++ b/drivers/hwmon/adt7475.c @@ -112,6 +112,8 @@ #define CONFIG3_THERM 0x02 #define CONFIG4_PINFUNC 0x03 +#define CONFIG4_THERM 0x01 +#define CONFIG4_SMBALERT 0x02 #define CONFIG4_MAXDUTY 0x08 #define CONFIG4_ATTN_IN10 0x30 #define CONFIG4_ATTN_IN43 0xC0 @@ -1460,6 +1462,96 @@ static int adt7475_update_limits(struct i2c_client *client) return 0; } +static int load_config3(const struct i2c_client *client, const char *propname) +{ + const char *function; + u8 config3; + int ret; + + ret = of_property_read_string(client->dev.of_node, propname, &function); + if (!ret) { + ret = adt7475_read(REG_CONFIG3); + if (ret < 0) + return ret; + + config3 = ret & ~CONFIG3_SMBALERT; + if (!strcmp("pwm2", function)) + ; + else if (!strcmp("smbalert#", function)) + config3 |= CONFIG3_SMBALERT; + else + return -EINVAL; + + return i2c_smbus_write_byte_data(client, REG_CONFIG3, config3); + } + + return 0; +} + +static int load_config4(const struct i2c_client *client, const char *propname) +{ + const char *function; + u8 config4; + int ret; + + ret = of_property_read_string(client->dev.of_node, propname, &function); + if (!ret) { + ret = adt7475_read(REG_CONFIG4); + if (ret < 0) + return ret; + + config4 = ret & ~CONFIG4_PINFUNC; + + if (!strcmp("tach4", function)) + ; + else if (!strcmp("therm#", function)) + config4 |= CONFIG4_THERM; + else if (!strcmp("smbalert#", function)) + config4 |= CONFIG4_SMBALERT; + else if (!strcmp("gpio", function)) + config4 |= CONFIG4_PINFUNC; + else + return -EINVAL; + + return i2c_smbus_write_byte_data(client, REG_CONFIG4, config4); + } + + return 0; +} + +static int load_config(const struct i2c_client *client, enum chips chip) +{ + int err; + const char *prop1, *prop2; + + switch (chip) { + case adt7473: + case adt7475: + prop1 = "adi,pin5-function"; + prop2 = "adi,pin9-function"; + break; + case adt7476: + case adt7490: + prop1 = "adi,pin10-function"; + prop2 = "adi,pin14-function"; + break; + } + + err = load_config3(client, prop1); + if (err) { + dev_err(&client->dev, "failed to configure %s\n", prop1); + return err; + } + + err = load_config4(client, prop2); + if (err) { + dev_err(&client->dev, "failed to configure %s\n", prop2); + return err; + } + + return 0; +} + static int set_property_bit(const struct i2c_client *client, char *property, u8 *config, u8 bit_index) { @@ -1477,12 +1569,12 @@ static int set_property_bit(const struct i2c_client *client, char *property, return ret; } -static int load_attenuators(const struct i2c_client *client, int chip, +static int load_attenuators(const struct i2c_client *client, enum chips chip, struct adt7475_data *data) { - int ret; - - if (chip == adt7476 || chip == adt7490) { + switch (chip) { + case adt7476: + case adt7490: set_property_bit(client, "adi,bypass-attenuator-in0", &data->config4, 4); set_property_bit(client, "adi,bypass-attenuator-in1", @@ -1492,18 +1584,15 @@ static int load_attenuators(const struct i2c_client *client, int chip, set_property_bit(client, "adi,bypass-attenuator-in4", &data->config4, 7); - ret = i2c_smbus_write_byte_data(client, REG_CONFIG4, - data->config4); - if (ret < 0) - return ret; - } else if (chip == adt7473 || chip == adt7475) { + return i2c_smbus_write_byte_data(client, REG_CONFIG4, + data->config4); + case adt7473: + case adt7475: set_property_bit(client, "adi,bypass-attenuator-in1", &data->config2, 5); - ret = i2c_smbus_write_byte_data(client, REG_CONFIG2, - data->config2); - if (ret < 0) - return ret; + return i2c_smbus_write_byte_data(client, REG_CONFIG2, + data->config2); } return 0; @@ -1585,6 +1674,10 @@ static int adt7475_probe(struct i2c_client *client) revision = adt7475_read(REG_DEVID2) & 0x07; } + ret = load_config(client, chip); + if (ret) + return ret; + config3 = adt7475_read(REG_CONFIG3); /* Pin PWM2 may alternatively be used for ALERT output */ if (!(config3 & CONFIG3_SMBALERT)) |