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| author | Mike Jones <michael-a1.jones@analog.com> | 2020-01-28 10:59:59 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-02-28 15:42:14 +0100 |
| commit | 65f44164b08017d1be12c0654d6d343051c04dc3 (patch) | |
| tree | 48ef15a426777e79973d5ef857c52336648e2590 /drivers/hwmon | |
| parent | 392bf8536ed9d221d2fc137e9d6d35bb0da09b5e (diff) | |
| download | linux-stable-65f44164b08017d1be12c0654d6d343051c04dc3.tar.gz linux-stable-65f44164b08017d1be12c0654d6d343051c04dc3.tar.bz2 linux-stable-65f44164b08017d1be12c0654d6d343051c04dc3.zip | |
hwmon: (pmbus/ltc2978) Fix PMBus polling of MFR_COMMON definitions.
commit cf2b012c90e74e85d8aea7d67e48868069cfee0c upstream.
Change 21537dc driver PMBus polling of MFR_COMMON from bits 5/4 to
bits 6/5. This fixs a LTC297X family bug where polling always returns
not busy even when the part is busy. This fixes a LTC388X and
LTM467X bug where polling used PEND and NOT_IN_TRANS, and BUSY was
not polled, which can lead to NACKing of commands. LTC388X and
LTM467X modules now poll BUSY and PEND, increasing reliability by
eliminating NACKing of commands.
Signed-off-by: Mike Jones <michael-a1.jones@analog.com>
Link: https://lore.kernel.org/r/1580234400-2829-2-git-send-email-michael-a1.jones@analog.com
Fixes: e04d1ce9bbb49 ("hwmon: (ltc2978) Add polling for chips requiring it")
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/hwmon')
| -rw-r--r-- | drivers/hwmon/pmbus/ltc2978.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/hwmon/pmbus/ltc2978.c b/drivers/hwmon/pmbus/ltc2978.c index 58b789c28b48..94eea2ac6251 100644 --- a/drivers/hwmon/pmbus/ltc2978.c +++ b/drivers/hwmon/pmbus/ltc2978.c @@ -89,8 +89,8 @@ enum chips { ltc2974, ltc2975, ltc2977, ltc2978, ltc2980, ltc3880, ltc3882, #define LTC_POLL_TIMEOUT 100 /* in milli-seconds */ -#define LTC_NOT_BUSY BIT(5) -#define LTC_NOT_PENDING BIT(4) +#define LTC_NOT_BUSY BIT(6) +#define LTC_NOT_PENDING BIT(5) /* * LTC2978 clears peak data whenever the CLEAR_FAULTS command is executed, which |