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authorGuenter Roeck <guenter.roeck@ericsson.com>2011-10-01 16:50:36 -0700
committerGuenter Roeck <guenter.roeck@ericsson.com>2012-01-05 08:19:27 -0800
commitbc581e6fcc3bd901d20765638422ef957559a8d1 (patch)
tree6109bd949447be039d4dd4630b9456ec2281d27e /drivers/hwmon/pmbus
parent87102808d03948c825c3bdc48316e48f6422fd7e (diff)
downloadlinux-next-bc581e6fcc3bd901d20765638422ef957559a8d1.tar.gz
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/Kconfig4
-rw-r--r--drivers/hwmon/pmbus/zl6100.c19
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