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authorEddie James <eajames@linux.ibm.com>2020-03-11 20:43:10 +0300
committerGuenter Roeck <linux@roeck-us.net>2020-03-15 16:38:59 +0300
commitb1fbe673b89e88adae0800ab8bef69854be58720 (patch)
tree47e403642574730e552e266abf23cf2aba9e4ed3 /drivers/hwmon
parent02fc3c7cc73c7ebefbbe88ce6d9447577c4f6127 (diff)
downloadlinux-b1fbe673b89e88adae0800ab8bef69854be58720.tar.xz
hwmon: (pmbus/ibm-cffps) Add another PSU CCIN to version detection
There is an additional CCIN for the IBM CFFPS that may be classifed as either version one or version two, based upon the rest of the bits of the CCIN. Add support for it in the version detection. Signed-off-by: Eddie James <eajames@linux.ibm.com> Link: https://lore.kernel.org/r/1583948590-17220-1-git-send-email-eajames@linux.ibm.com Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'drivers/hwmon')
-rw-r--r--drivers/hwmon/pmbus/ibm-cffps.c14
1 files changed, 13 insertions, 1 deletions
diff --git a/drivers/hwmon/pmbus/ibm-cffps.c b/drivers/hwmon/pmbus/ibm-cffps.c
index b9bfa43f2508..7d300f2f338d 100644
--- a/drivers/hwmon/pmbus/ibm-cffps.c
+++ b/drivers/hwmon/pmbus/ibm-cffps.c
@@ -33,9 +33,12 @@
#define CFFPS_INPUT_HISTORY_CMD 0xD6
#define CFFPS_INPUT_HISTORY_SIZE 100
+#define CFFPS_CCIN_REVISION GENMASK(7, 0)
+#define CFFPS_CCIN_REVISION_LEGACY 0xde
#define CFFPS_CCIN_VERSION GENMASK(15, 8)
#define CFFPS_CCIN_VERSION_1 0x2b
#define CFFPS_CCIN_VERSION_2 0x2e
+#define CFFPS_CCIN_VERSION_3 0x51
/* STATUS_MFR_SPECIFIC bits */
#define CFFPS_MFR_FAN_FAULT BIT(0)
@@ -486,11 +489,14 @@ static int ibm_cffps_probe(struct i2c_client *client,
vs = (enum versions)id->driver_data;
if (vs == cffps_unknown) {
+ u16 ccin_revision = 0;
u16 ccin_version = CFFPS_CCIN_VERSION_1;
int ccin = i2c_smbus_read_word_swapped(client, CFFPS_CCIN_CMD);
- if (ccin > 0)
+ if (ccin > 0) {
+ ccin_revision = FIELD_GET(CFFPS_CCIN_REVISION, ccin);
ccin_version = FIELD_GET(CFFPS_CCIN_VERSION, ccin);
+ }
switch (ccin_version) {
default:
@@ -500,6 +506,12 @@ static int ibm_cffps_probe(struct i2c_client *client,
case CFFPS_CCIN_VERSION_2:
vs = cffps2;
break;
+ case CFFPS_CCIN_VERSION_3:
+ if (ccin_revision == CFFPS_CCIN_REVISION_LEGACY)
+ vs = cffps1;
+ else
+ vs = cffps2;
+ break;
}
/* Set the client name to include the version number. */