4.18-stable review patch. If anyone has any objections, please let me know.
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From: Guenter Roeck linux@roeck-us.net
[ Upstream commit f6de298806d9cbc63a4907bca34a06162b9d7dce ]
fan7 on NCT6796D does not have a fan count register; it only has an RPM register. Switch to using RPM registers to read the fan speed for all chips supporting it to solve the problem for good.
Reported-by: Robert Kern ulteq@web.de Cc: Robert Kern ulteq@web.de Fixes: 81820059a428 ("hwmon: (nct6775) Add support for NCT6796D") Signed-off-by: Guenter Roeck linux@roeck-us.net Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/hwmon/nct6775.c | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-)
--- a/drivers/hwmon/nct6775.c +++ b/drivers/hwmon/nct6775.c @@ -502,7 +502,7 @@ static const s8 NCT6779_BEEP_BITS[] = { 30, 31 }; /* intrusion0, intrusion1 */
static const u16 NCT6779_REG_FAN[] = { - 0x4b0, 0x4b2, 0x4b4, 0x4b6, 0x4b8, 0x4ba, 0x660 }; + 0x4c0, 0x4c2, 0x4c4, 0x4c6, 0x4c8, 0x4ca, 0x660 }; static const u16 NCT6779_REG_FAN_PULSES[NUM_FAN] = { 0x644, 0x645, 0x646, 0x647, 0x648, 0x649 };
@@ -924,6 +924,11 @@ static unsigned int fan_from_reg16(u16 r return 1350000U / (reg << divreg); }
+static unsigned int fan_from_reg_rpm(u16 reg, unsigned int divreg) +{ + return reg; +} + static u16 fan_to_reg(u32 fan, unsigned int divreg) { if (!fan) @@ -1284,7 +1289,7 @@ static bool is_word_sized(struct nct6775 case nct6795: case nct6796: return reg == 0x150 || reg == 0x153 || reg == 0x155 || - ((reg & 0xfff0) == 0x4b0 && (reg & 0x000f) < 0x0b) || + (reg & 0xfff0) == 0x4c0 || reg == 0x402 || reg == 0x63a || reg == 0x63c || reg == 0x63e || reg == 0x640 || reg == 0x642 || reg == 0x64a || @@ -3868,7 +3873,7 @@ static int nct6775_probe(struct platform data->ALARM_BITS = NCT6779_ALARM_BITS; data->BEEP_BITS = NCT6779_BEEP_BITS;
- data->fan_from_reg = fan_from_reg13; + data->fan_from_reg = fan_from_reg_rpm; data->fan_from_reg_min = fan_from_reg13; data->target_temp_mask = 0xff; data->tolerance_mask = 0x07; @@ -3949,7 +3954,7 @@ static int nct6775_probe(struct platform data->ALARM_BITS = NCT6791_ALARM_BITS; data->BEEP_BITS = NCT6779_BEEP_BITS;
- data->fan_from_reg = fan_from_reg13; + data->fan_from_reg = fan_from_reg_rpm; data->fan_from_reg_min = fan_from_reg13; data->target_temp_mask = 0xff; data->tolerance_mask = 0x07;