From 56aad5d143cbce620c079e1acf761b71f59758a0 Mon Sep 17 00:00:00 2001 From: Guenter Roeck Date: Fri, 24 Feb 2012 08:13:31 -0800 Subject: 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 Acked-by: Jean Delvare --- drivers/hwmon/pmbus/max34440.c | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'drivers/hwmon/pmbus') 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); @@ -72,6 +77,10 @@ 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; -- cgit 1.4.1