diff options
| author | Ira W. Snyder <iws@ovro.caltech.edu> | 2010-05-27 19:59:02 +0200 |
|---|---|---|
| committer | Jean Delvare <khali@linux-fr.org> | 2010-05-27 19:59:02 +0200 |
| commit | df16dd53c575d0cb9dbee20a3149927c862a9ff6 (patch) | |
| tree | 767244e8aaa1d9bcb996e4fc83637eb100ff7868 /drivers/hwmon/ltc4245.c | |
| parent | ea694431f9c862bd409c90ba1cb3bdc6fdde8635 (diff) | |
hwmon: (ltc4245) Read only one GPIO pin
Read only one of the GPIO pins as an analog voltage. The ADC can be
switched to a different GPIO pin at runtime, but this is not supported.
Previously, this driver would report the analog voltage of the currently
selected GPIO pin as all three GPIO voltages: in9_input, in10_input and
in11_input.
Signed-off-by: Ira W. Snyder <iws@ovro.caltech.edu>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: stable@kernel.org
Diffstat (limited to 'drivers/hwmon/ltc4245.c')
| -rw-r--r-- | drivers/hwmon/ltc4245.c | 18 |
1 files changed, 5 insertions, 13 deletions
diff --git a/drivers/hwmon/ltc4245.c b/drivers/hwmon/ltc4245.c index 65c232a9d0c..21d201befc2 100644 --- a/drivers/hwmon/ltc4245.c +++ b/drivers/hwmon/ltc4245.c @@ -45,9 +45,7 @@ enum ltc4245_cmd { LTC4245_VEEIN = 0x19, LTC4245_VEESENSE = 0x1a, LTC4245_VEEOUT = 0x1b, - LTC4245_GPIOADC1 = 0x1c, - LTC4245_GPIOADC2 = 0x1d, - LTC4245_GPIOADC3 = 0x1e, + LTC4245_GPIOADC = 0x1c, }; struct ltc4245_data { @@ -61,7 +59,7 @@ struct ltc4245_data { u8 cregs[0x08]; /* Voltage registers */ - u8 vregs[0x0f]; + u8 vregs[0x0d]; }; static struct ltc4245_data *ltc4245_update_device(struct device *dev) @@ -86,7 +84,7 @@ static struct ltc4245_data *ltc4245_update_device(struct device *dev) data->cregs[i] = val; } - /* Read voltage registers -- 0x10 to 0x1f */ + /* Read voltage registers -- 0x10 to 0x1c */ for (i = 0; i < ARRAY_SIZE(data->vregs); i++) { val = i2c_smbus_read_byte_data(client, i+0x10); if (unlikely(val < 0)) @@ -128,9 +126,7 @@ static int ltc4245_get_voltage(struct device *dev, u8 reg) case LTC4245_VEEOUT: voltage = regval * -55; break; - case LTC4245_GPIOADC1: - case LTC4245_GPIOADC2: - case LTC4245_GPIOADC3: + case LTC4245_GPIOADC: voltage = regval * 10; break; default: @@ -297,9 +293,7 @@ LTC4245_ALARM(in7_min_alarm, (1 << 2), LTC4245_FAULT2); LTC4245_ALARM(in8_min_alarm, (1 << 3), LTC4245_FAULT2); /* GPIO voltages */ -LTC4245_VOLTAGE(in9_input, LTC4245_GPIOADC1); -LTC4245_VOLTAGE(in10_input, LTC4245_GPIOADC2); -LTC4245_VOLTAGE(in11_input, LTC4245_GPIOADC3); +LTC4245_VOLTAGE(in9_input, LTC4245_GPIOADC); /* Power Consumption (virtual) */ LTC4245_POWER(power1_input, LTC4245_12VSENSE); @@ -342,8 +336,6 @@ static struct attribute *ltc4245_attributes[] = { &sensor_dev_attr_in8_min_alarm.dev_attr.attr, &sensor_dev_attr_in9_input.dev_attr.attr, - &sensor_dev_attr_in10_input.dev_attr.attr, - &sensor_dev_attr_in11_input.dev_attr.attr, &sensor_dev_attr_power1_input.dev_attr.attr, &sensor_dev_attr_power2_input.dev_attr.attr, |