hwmon: (pmbus/ltc2978) Fix PMBus polling of MFR_COMMON definitions.
commitcf2b012c90
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:e04d1ce9bb
("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>
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@ -82,8 +82,8 @@ enum chips { ltc2974, ltc2975, ltc2977, ltc2978, ltc2980, ltc3880, ltc3882,
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#define LTC_POLL_TIMEOUT 100 /* in milli-seconds */
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#define LTC_NOT_BUSY BIT(5)
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#define LTC_NOT_PENDING BIT(4)
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#define LTC_NOT_BUSY BIT(6)
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#define LTC_NOT_PENDING BIT(5)
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/*
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* LTC2978 clears peak data whenever the CLEAR_FAULTS command is executed, which
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