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hwmon: (pmbus) cffps: Add PMBUS_SKIP_STATUS_CHECK 

This power supply device regularly fails to read VOUT_MODE due to the
CML bit going high. This results in an incorrect exponent used for the
voltage data, and therefore the power supply reports incorrect voltage.
Work around this by setting the pmbus flag to skip the CML check.

Signed-off-by: Eddie James <eajames@linux.vnet.ibm.com>
Fixes: f69316d62c ("hwmon: (pmbus) Add IBM Common Form Factor (CFF) ...")
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Eddie James 2018-01-08 15:10:09 -06:00 committed by Guenter Roeck
parent 18c514cc0e
commit 4471879acf
1 changed files with 6 additions and 0 deletions
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6
drivers/hwmon/pmbus/ibm-cffps.c
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@ -15,6 +15,7 @@
#include <linux/jiffies.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/pmbus.h>
#include "pmbus.h"
@ -268,6 +269,10 @@ static struct pmbus_driver_info ibm_cffps_info = {
.read_word_data = ibm_cffps_read_word_data,
};
static struct pmbus_platform_data ibm_cffps_pdata = {
.flags = PMBUS_SKIP_STATUS_CHECK,
};
static int ibm_cffps_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
@ -276,6 +281,7 @@ static int ibm_cffps_probe(struct i2c_client *client,
struct dentry *ibm_cffps_dir;
struct ibm_cffps *psu;
client->dev.platform_data = &ibm_cffps_pdata;
rc = pmbus_do_probe(client, id, &ibm_cffps_info);
if (rc)
return rc;