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Commit 55066354 authored by Guenter Roeck's avatar Guenter Roeck
Browse files

hwmon: (nct6775) Use different register to get fan RPM for fan7 



The documented register to retrieve the fan RPM for fan7 is found
to be unreliable at least with NCT6796D revision 3. Let's use
register 0x4ce instead. This is undocumented for NCT6796D, but
documented for NCT6797D and NCT6798D and known to be working.

Reported-by: default avatarRobert Kern <ulteq@web.de>
Cc: Robert Kern <ulteq@web.de>
Fixes: 81820059 ("hwmon: (nct6775) Add support for NCT6796D")
Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
parent f6de2988

drivers/hwmon/nct6775.c

+2 −2
Original line number Diff line number Diff line
@@ -502,7 +502,7 @@ static const s8 NCT6779_BEEP_BITS[] = { 
	30, 31 };			/* intrusion0, intrusion1 */



static const u16 NCT6779_REG_FAN[] = {

	0x4c0, 0x4c2, 0x4c4, 0x4c6, 0x4c8, 0x4ca, 0x660 };

	0x4c0, 0x4c2, 0x4c4, 0x4c6, 0x4c8, 0x4ca, 0x4ce };

static const u16 NCT6779_REG_FAN_PULSES[NUM_FAN] = {

	0x644, 0x645, 0x646, 0x647, 0x648, 0x649 };
@@ -1293,7 +1293,7 @@ static bool is_word_sized(struct nct6775_data *data, u16 reg) 
		  reg == 0x402 ||

		  reg == 0x63a || reg == 0x63c || reg == 0x63e ||

		  reg == 0x640 || reg == 0x642 || reg == 0x64a ||

		  reg == 0x64c || reg == 0x660 ||

		  reg == 0x64c ||

		  reg == 0x73 || reg == 0x75 || reg == 0x77 || reg == 0x79 ||

		  reg == 0x7b || reg == 0x7d;

	}