diff options
| author | Guenter Roeck <guenter.roeck@ericsson.com> | 2011-10-01 16:50:36 -0700 |
|---|---|---|
| committer | Guenter Roeck <guenter.roeck@ericsson.com> | 2012-01-05 08:19:27 -0800 |
| commit | bc581e6fcc3bd901d20765638422ef957559a8d1 (patch) | |
| tree | 6109bd949447be039d4dd4630b9456ec2281d27e /drivers/hwmon/pmbus | |
| parent | 87102808d03948c825c3bdc48316e48f6422fd7e (diff) | |
| download | lwn-bc581e6fcc3bd901d20765638422ef957559a8d1.tar.gz lwn-bc581e6fcc3bd901d20765638422ef957559a8d1.zip | |
hwmon: (pmbus/zl6100) Add support for ZL2005
Add explicit support for ZL2005. Functionality is almost the same as with other
Zilker Labs / Intersil chips, but limit register detection does not work reliably.
Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
Reviewed-by: Robert Coulson <robert.coulson@ericsson.com>
Diffstat (limited to 'drivers/hwmon/pmbus')
| -rw-r--r-- | drivers/hwmon/pmbus/Kconfig | 4 | ||||
| -rw-r--r-- | drivers/hwmon/pmbus/zl6100.c | 19 |
2 files changed, 19 insertions, 4 deletions
diff --git a/drivers/hwmon/pmbus/Kconfig b/drivers/hwmon/pmbus/Kconfig index 4b26f51920ba..d357ab280263 100644 --- a/drivers/hwmon/pmbus/Kconfig +++ b/drivers/hwmon/pmbus/Kconfig @@ -113,8 +113,8 @@ config SENSORS_ZL6100 default n help If you say yes here you get hardware monitoring support for Intersil - ZL2004, ZL2006, ZL2008, ZL2105, ZL2106, ZL6100, and ZL6105 Digital - DC/DC Controllers. + ZL2004, ZL2005, ZL2006, ZL2008, ZL2105, ZL2106, ZL6100, and ZL6105 + Digital DC/DC Controllers. This driver can also be built as a module. If so, the module will be called zl6100. diff --git a/drivers/hwmon/pmbus/zl6100.c b/drivers/hwmon/pmbus/zl6100.c index 2bc980006f83..d78bdcf467f3 100644 --- a/drivers/hwmon/pmbus/zl6100.c +++ b/drivers/hwmon/pmbus/zl6100.c @@ -28,7 +28,7 @@ #include <linux/delay.h> #include "pmbus.h" -enum chips { zl2004, zl2006, zl2008, zl2105, zl2106, zl6100, zl6105 }; +enum chips { zl2004, zl2005, zl2006, zl2008, zl2105, zl2106, zl6100, zl6105 }; struct zl6100_data { int id; @@ -65,6 +65,19 @@ static int zl6100_read_word_data(struct i2c_client *client, int page, int reg) if (page || reg >= PMBUS_VIRT_BASE) return -ENXIO; + if (data->id == zl2005) { + /* + * Limit register detection is not reliable on ZL2005. + * Make sure registers are not erroneously detected. + */ + switch (reg) { + case PMBUS_VOUT_OV_WARN_LIMIT: + case PMBUS_VOUT_UV_WARN_LIMIT: + case PMBUS_IOUT_OC_WARN_LIMIT: + return -ENXIO; + } + } + zl6100_wait(data); ret = pmbus_read_word_data(client, page, reg); data->access = ktime_get(); @@ -123,6 +136,7 @@ static int zl6100_write_byte(struct i2c_client *client, int page, u8 value) static const struct i2c_device_id zl6100_id[] = { {"zl2004", zl2004}, + {"zl2005", zl2005}, {"zl2006", zl2006}, {"zl2008", zl2008}, {"zl2105", zl2105}, @@ -177,8 +191,9 @@ static int zl6100_probe(struct i2c_client *client, data->id = mid->driver_data; /* - * ZL2008, ZL2105, and ZL6100 are known to require a wait time + * ZL2005, ZL2008, ZL2105, and ZL6100 are known to require a wait time * between I2C accesses. ZL2004 and ZL6105 are known to be safe. + * Other chips have not yet been tested. * * Only clear the wait time for chips known to be safe. The wait time * can be cleared later for additional chips if tests show that it |