From da7dc0568491104c7acb632e9d41ddce9aaabbb1 Mon Sep 17 00:00:00 2001
From: Guenter Roeck <linux@roeck-us.net>
Date: Fri, 26 Nov 2021 22:43:39 -0800
Subject: [PATCH] hwmom: (lm90) Fix citical alarm status for MAX6680/MAX6681
Git-commit: da7dc0568491104c7acb632e9d41ddce9aaabbb1
Patch-mainline: v5.16-rc7
References: git-fixes
Tests with a real chip and a closer look into the datasheet reveals
that the local and remote critical alarm status bits are swapped for
MAX6680/MAX6681.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/hwmon/lm90.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/drivers/hwmon/lm90.c b/drivers/hwmon/lm90.c
index 6597d055e09d..dd8612a9d536 100644
--- a/drivers/hwmon/lm90.c
+++ b/drivers/hwmon/lm90.c
@@ -190,6 +190,7 @@ enum chips { lm90, adm1032, lm99, lm86, max6657, max6659, adt7461, max6680,
#define LM90_HAVE_EXTENDED_TEMP (1 << 8) /* extended temperature support*/
#define LM90_PAUSE_FOR_CONFIG (1 << 9) /* Pause conversion for config */
#define LM90_HAVE_CRIT (1 << 10)/* Chip supports CRIT/OVERT register */
+#define LM90_HAVE_CRIT_ALRM_SWP (1 << 11)/* critical alarm bits swapped */
/* LM90 status */
#define LM90_STATUS_LTHRM (1 << 0) /* local THERM limit tripped */
@@ -415,7 +416,8 @@ static const struct lm90_params lm90_params[] = {
.reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL,
},
[max6680] = {
- .flags = LM90_HAVE_OFFSET | LM90_HAVE_CRIT,
+ .flags = LM90_HAVE_OFFSET | LM90_HAVE_CRIT
+ | LM90_HAVE_CRIT_ALRM_SWP,
.alert_alarms = 0x7c,
.max_convrate = 7,
},
@@ -1201,6 +1203,7 @@ static const u8 lm90_temp_emerg_index[3] = {
static const u8 lm90_min_alarm_bits[3] = { 5, 3, 11 };
static const u8 lm90_max_alarm_bits[3] = { 6, 4, 12 };
static const u8 lm90_crit_alarm_bits[3] = { 0, 1, 9 };
+static const u8 lm90_crit_alarm_bits_swapped[3] = { 1, 0, 9 };
static const u8 lm90_emergency_alarm_bits[3] = { 15, 13, 14 };
static const u8 lm90_fault_bits[3] = { 0, 2, 10 };
@@ -1226,7 +1229,10 @@ static int lm90_temp_read(struct device *dev, u32 attr, int channel, long *val)
*val = (data->alarms >> lm90_max_alarm_bits[channel]) & 1;
break;
case hwmon_temp_crit_alarm:
- *val = (data->alarms >> lm90_crit_alarm_bits[channel]) & 1;
+ if (data->flags & LM90_HAVE_CRIT_ALRM_SWP)
+ *val = (data->alarms >> lm90_crit_alarm_bits_swapped[channel]) & 1;
+ else
+ *val = (data->alarms >> lm90_crit_alarm_bits[channel]) & 1;
break;
case hwmon_temp_emergency_alarm:
*val = (data->alarms >> lm90_emergency_alarm_bits[channel]) & 1;
--
2.31.1