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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>
This commit is contained in:
Guenter Roeck 2011-10-01 16:50:36 -07:00
parent 87102808d0
commit bc581e6fcc
3 changed files with 23 additions and 4 deletions
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4
Documentation/hwmon/zl6100
View File

@ -6,6 +6,10 @@ Supported chips:
Prefix: 'zl2004'
Addresses scanned: -
Datasheet: http://www.intersil.com/data/fn/fn6847.pdf
* Intersil / Zilker Labs ZL2005
Prefix: 'zl2005'
Addresses scanned: -
Datasheet: http://www.intersil.com/data/fn/fn6848.pdf
* Intersil / Zilker Labs ZL2006
Prefix: 'zl2006'
Addresses scanned: -

4
drivers/hwmon/pmbus/Kconfig
View File

@ -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.

19
drivers/hwmon/pmbus/zl6100.c
View File

@ -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