diff options
| author | Guenter Roeck <guenter.roeck@ericsson.com> | 2011-07-09 13:11:44 -0700 |
|---|---|---|
| committer | Guenter Roeck <guenter.roeck@ericsson.com> | 2011-07-28 17:09:53 -0700 |
| commit | 70e94b276c21638a0a37908f6696a6b122944dea (patch) | |
| tree | 9d017d968a85b4d5313c4f5117bcae042f73555e /drivers/hwmon | |
| parent | 8ebed854506301f4f67e75c73cae967d4a45ab4d (diff) | |
hwmon: (max8688) Add support for peak attributes
Add support for voltage, current, and temperature peak (historic maximum)
attributes.
Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
Diffstat (limited to 'drivers/hwmon')
| -rw-r--r-- | drivers/hwmon/pmbus/max8688.c | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/drivers/hwmon/pmbus/max8688.c b/drivers/hwmon/pmbus/max8688.c index ddc8a64c2ba..c3e72f1a3cf 100644 --- a/drivers/hwmon/pmbus/max8688.c +++ b/drivers/hwmon/pmbus/max8688.c @@ -25,6 +25,9 @@ #include <linux/i2c.h> #include "pmbus.h" +#define MAX8688_MFR_VOUT_PEAK 0xd4 +#define MAX8688_MFR_IOUT_PEAK 0xd5 +#define MAX8688_MFR_TEMPERATURE_PEAK 0xd6 #define MAX8688_MFG_STATUS 0xd8 #define MAX8688_STATUS_OC_FAULT (1 << 4) @@ -37,6 +40,62 @@ #define MAX8688_STATUS_OT_FAULT (1 << 13) #define MAX8688_STATUS_OT_WARNING (1 << 14) +static int max8688_read_word_data(struct i2c_client *client, int page, int reg) +{ + int ret; + + if (page) + return -EINVAL; + + switch (reg) { + case PMBUS_VIRT_READ_VOUT_MAX: + ret = pmbus_read_word_data(client, 0, MAX8688_MFR_VOUT_PEAK); + break; + case PMBUS_VIRT_READ_IOUT_MAX: + ret = pmbus_read_word_data(client, 0, MAX8688_MFR_IOUT_PEAK); + break; + case PMBUS_VIRT_READ_TEMP_MAX: + ret = pmbus_read_word_data(client, 0, + MAX8688_MFR_TEMPERATURE_PEAK); + break; + case PMBUS_VIRT_RESET_VOUT_HISTORY: + case PMBUS_VIRT_RESET_IOUT_HISTORY: + case PMBUS_VIRT_RESET_TEMP_HISTORY: + ret = 0; + break; + default: + ret = -ENODATA; + break; + } + return ret; +} + +static int max8688_write_word_data(struct i2c_client *client, int page, int reg, + u16 word) +{ + int ret; + + switch (reg) { + case PMBUS_VIRT_RESET_VOUT_HISTORY: + ret = pmbus_write_word_data(client, 0, MAX8688_MFR_VOUT_PEAK, + 0); + break; + case PMBUS_VIRT_RESET_IOUT_HISTORY: + ret = pmbus_write_word_data(client, 0, MAX8688_MFR_IOUT_PEAK, + 0); + break; + case PMBUS_VIRT_RESET_TEMP_HISTORY: + ret = pmbus_write_word_data(client, 0, + MAX8688_MFR_TEMPERATURE_PEAK, + 0xffff); + break; + default: + ret = -ENODATA; + break; + } + return ret; +} + static int max8688_read_byte_data(struct i2c_client *client, int page, int reg) { int ret = 0; @@ -111,6 +170,8 @@ static struct pmbus_driver_info max8688_info = { | PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_STATUS_TEMP, .read_byte_data = max8688_read_byte_data, + .read_word_data = max8688_read_word_data, + .write_word_data = max8688_write_word_data, }; static int max8688_probe(struct i2c_client *client, |