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| author | Guenter Roeck <linux@roeck-us.net> | 2012-02-24 08:13:31 -0800 |
|---|---|---|
| committer | Guenter Roeck <guenter.roeck@ericsson.com> | 2012-03-18 18:27:49 -0700 |
| commit | 56aad5d143cbce620c079e1acf761b71f59758a0 (patch) | |
| tree | 39705a8f7d580d9d1b352aac5d5bc5e69393db15 /drivers/hwmon/pmbus | |
| parent | f15df57ded710bd018794a264b900975ce3599a0 (diff) | |
| download | lwn-56aad5d143cbce620c079e1acf761b71f59758a0.tar.gz lwn-56aad5d143cbce620c079e1acf761b71f59758a0.zip | |
hwmon: (max34440) Add support for 'lowest' output voltage attribute
MAX34440 and compatibles support reporting the lowest measured output voltage.
Add support for it.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Jean Delvare <khali@linux-fr.org>
Diffstat (limited to 'drivers/hwmon/pmbus')
| -rw-r--r-- | drivers/hwmon/pmbus/max34440.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/hwmon/pmbus/max34440.c b/drivers/hwmon/pmbus/max34440.c index 7d830c1e7032..95ee9e195cb6 100644 --- a/drivers/hwmon/pmbus/max34440.c +++ b/drivers/hwmon/pmbus/max34440.c @@ -30,6 +30,7 @@ enum chips { max34440, max34441 }; #define MAX34440_MFR_VOUT_PEAK 0xd4 #define MAX34440_MFR_IOUT_PEAK 0xd5 #define MAX34440_MFR_TEMPERATURE_PEAK 0xd6 +#define MAX34440_MFR_VOUT_MIN 0xd7 #define MAX34440_STATUS_OC_WARN (1 << 0) #define MAX34440_STATUS_OC_FAULT (1 << 1) @@ -41,6 +42,10 @@ static int max34440_read_word_data(struct i2c_client *client, int page, int reg) int ret; switch (reg) { + case PMBUS_VIRT_READ_VOUT_MIN: + ret = pmbus_read_word_data(client, page, + MAX34440_MFR_VOUT_MIN); + break; case PMBUS_VIRT_READ_VOUT_MAX: ret = pmbus_read_word_data(client, page, MAX34440_MFR_VOUT_PEAK); @@ -73,6 +78,10 @@ static int max34440_write_word_data(struct i2c_client *client, int page, switch (reg) { case PMBUS_VIRT_RESET_VOUT_HISTORY: ret = pmbus_write_word_data(client, page, + MAX34440_MFR_VOUT_MIN, 0x7fff); + if (ret) + break; + ret = pmbus_write_word_data(client, page, MAX34440_MFR_VOUT_PEAK, 0); break; case PMBUS_VIRT_RESET_IOUT_HISTORY: |