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Date: Wed, 25 May 2022 06:57:58 -0700
From: Guenter Roeck <linux@...ck-us.net>
To: linux-hwmon@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, Jean Delvare <jdelvare@...e.com>,
Slawomir Stepien <sst@...zta.fm>,
Guenter Roeck <linux@...ck-us.net>
Subject: [PATCH 40/40] hwmon: (lm90) Support temp_samples attribute
Several of the chips supported by this driver support configuring the
number of samples (or the fault queue depth) necessary before a fault
or alarm is reported. This is done either with a bit in the configuration
register or with a separate "consecutive alert" register. Support this
functionality with the temp_samples attribute.
Signed-off-by: Guenter Roeck <linux@...ck-us.net>
---
drivers/hwmon/lm90.c | 105 +++++++++++++++++++++++++++++++++++++------
1 file changed, 91 insertions(+), 14 deletions(-)
diff --git a/drivers/hwmon/lm90.c b/drivers/hwmon/lm90.c
index 7f8397c362e8..4c25c9ffdfe9 100644
--- a/drivers/hwmon/lm90.c
+++ b/drivers/hwmon/lm90.c
@@ -206,6 +206,7 @@ enum chips { adm1023, adm1032, adt7461, adt7461a, adt7481,
#define LM90_HAVE_LOW BIT(15) /* low limits */
#define LM90_HAVE_CONVRATE BIT(16) /* conversion rate */
#define LM90_HAVE_REMOTE_EXT BIT(17) /* extended remote temperature */
+#define LM90_HAVE_FAULTQUEUE BIT(18) /* configurable samples count */
/* LM90 status */
#define LM90_STATUS_LTHRM BIT(0) /* local THERM limit tripped */
@@ -404,6 +405,8 @@ struct lm90_params {
u8 resolution; /* 16-bit resolution (default 11 bit) */
u8 reg_status2; /* 2nd status register (optional) */
u8 reg_local_ext; /* Extended local temp register (optional) */
+ u8 faultqueue_mask; /* fault queue bit mask */
+ u8 faultqueue_depth; /* fault queue depth if mask is used */
};
static const struct lm90_params lm90_params[] = {
@@ -419,7 +422,8 @@ static const struct lm90_params lm90_params[] = {
.flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT
| LM90_HAVE_BROKEN_ALERT | LM90_HAVE_CRIT
| LM90_HAVE_PARTIAL_PEC | LM90_HAVE_ALARMS
- | LM90_HAVE_LOW | LM90_HAVE_CONVRATE | LM90_HAVE_REMOTE_EXT,
+ | LM90_HAVE_LOW | LM90_HAVE_CONVRATE | LM90_HAVE_REMOTE_EXT
+ | LM90_HAVE_FAULTQUEUE,
.alert_alarms = 0x7c,
.max_convrate = 10,
},
@@ -433,7 +437,7 @@ static const struct lm90_params lm90_params[] = {
| LM90_HAVE_BROKEN_ALERT | LM90_HAVE_EXTENDED_TEMP
| LM90_HAVE_CRIT | LM90_HAVE_PARTIAL_PEC
| LM90_HAVE_ALARMS | LM90_HAVE_LOW | LM90_HAVE_CONVRATE
- | LM90_HAVE_REMOTE_EXT,
+ | LM90_HAVE_REMOTE_EXT | LM90_HAVE_FAULTQUEUE,
.alert_alarms = 0x7c,
.max_convrate = 10,
.resolution = 10,
@@ -442,7 +446,8 @@ static const struct lm90_params lm90_params[] = {
.flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT
| LM90_HAVE_BROKEN_ALERT | LM90_HAVE_EXTENDED_TEMP
| LM90_HAVE_CRIT | LM90_HAVE_PEC | LM90_HAVE_ALARMS
- | LM90_HAVE_LOW | LM90_HAVE_CONVRATE | LM90_HAVE_REMOTE_EXT,
+ | LM90_HAVE_LOW | LM90_HAVE_CONVRATE | LM90_HAVE_REMOTE_EXT
+ | LM90_HAVE_FAULTQUEUE,
.alert_alarms = 0x7c,
.max_convrate = 10,
},
@@ -451,7 +456,8 @@ static const struct lm90_params lm90_params[] = {
| LM90_HAVE_BROKEN_ALERT | LM90_HAVE_EXTENDED_TEMP
| LM90_HAVE_UNSIGNED_TEMP | LM90_HAVE_PEC
| LM90_HAVE_TEMP3 | LM90_HAVE_CRIT | LM90_HAVE_LOW
- | LM90_HAVE_CONVRATE | LM90_HAVE_REMOTE_EXT,
+ | LM90_HAVE_CONVRATE | LM90_HAVE_REMOTE_EXT
+ | LM90_HAVE_FAULTQUEUE,
.alert_alarms = 0x1c7c,
.max_convrate = 11,
.resolution = 10,
@@ -461,7 +467,7 @@ static const struct lm90_params lm90_params[] = {
.flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT
| LM90_HAVE_BROKEN_ALERT | LM90_HAVE_CRIT
| LM90_HAVE_ALARMS | LM90_HAVE_LOW | LM90_HAVE_CONVRATE
- | LM90_HAVE_REMOTE_EXT,
+ | LM90_HAVE_REMOTE_EXT | LM90_HAVE_FAULTQUEUE,
.alert_alarms = 0x7c,
.max_convrate = 7,
},
@@ -472,16 +478,22 @@ static const struct lm90_params lm90_params[] = {
[lm90] = {
.flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT
| LM90_HAVE_CRIT | LM90_HAVE_ALARMS | LM90_HAVE_LOW
- | LM90_HAVE_CONVRATE | LM90_HAVE_REMOTE_EXT,
+ | LM90_HAVE_CONVRATE | LM90_HAVE_REMOTE_EXT
+ | LM90_HAVE_FAULTQUEUE,
.alert_alarms = 0x7b,
.max_convrate = 9,
+ .faultqueue_mask = BIT(0),
+ .faultqueue_depth = 3,
},
[lm99] = {
.flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT
| LM90_HAVE_CRIT | LM90_HAVE_ALARMS | LM90_HAVE_LOW
- | LM90_HAVE_CONVRATE | LM90_HAVE_REMOTE_EXT,
+ | LM90_HAVE_CONVRATE | LM90_HAVE_REMOTE_EXT
+ | LM90_HAVE_FAULTQUEUE,
.alert_alarms = 0x7b,
.max_convrate = 9,
+ .faultqueue_mask = BIT(0),
+ .faultqueue_depth = 3,
},
[max1617] = {
.flags = LM90_HAVE_CONVRATE | LM90_HAVE_BROKEN_ALERT |
@@ -492,10 +504,12 @@ static const struct lm90_params lm90_params[] = {
},
[max6642] = {
.flags = LM90_HAVE_BROKEN_ALERT | LM90_HAVE_EXT_UNSIGNED
- | LM90_HAVE_REMOTE_EXT,
+ | LM90_HAVE_REMOTE_EXT | LM90_HAVE_FAULTQUEUE,
.alert_alarms = 0x50,
.resolution = 10,
.reg_local_ext = MAX6657_REG_LOCAL_TEMPL,
+ .faultqueue_mask = BIT(4),
+ .faultqueue_depth = 2,
},
[max6646] = {
.flags = LM90_HAVE_CRIT | LM90_HAVE_BROKEN_ALERT
@@ -553,17 +567,20 @@ static const struct lm90_params lm90_params[] = {
.flags = LM90_HAVE_EMERGENCY
| LM90_HAVE_EMERGENCY_ALARM | LM90_HAVE_TEMP3 | LM90_HAVE_CRIT
| LM90_HAVE_ALARMS | LM90_HAVE_LOW | LM90_HAVE_CONVRATE
- | LM90_HAVE_REMOTE_EXT,
+ | LM90_HAVE_REMOTE_EXT | LM90_HAVE_FAULTQUEUE,
.alert_alarms = 0x1c7c,
.max_convrate = 6,
.reg_status2 = MAX6696_REG_STATUS2,
.reg_local_ext = MAX6657_REG_LOCAL_TEMPL,
+ .faultqueue_mask = BIT(5),
+ .faultqueue_depth = 4,
},
[nct72] = {
.flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT
| LM90_HAVE_BROKEN_ALERT | LM90_HAVE_EXTENDED_TEMP
| LM90_HAVE_CRIT | LM90_HAVE_PEC | LM90_HAVE_UNSIGNED_TEMP
- | LM90_HAVE_LOW | LM90_HAVE_CONVRATE | LM90_HAVE_REMOTE_EXT,
+ | LM90_HAVE_LOW | LM90_HAVE_CONVRATE | LM90_HAVE_REMOTE_EXT
+ | LM90_HAVE_FAULTQUEUE,
.alert_alarms = 0x7c,
.max_convrate = 10,
.resolution = 10,
@@ -598,16 +615,18 @@ static const struct lm90_params lm90_params[] = {
*/
.flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT | LM90_HAVE_CRIT
| LM90_HAVE_ALARMS | LM90_HAVE_LOW | LM90_HAVE_CONVRATE
- | LM90_HAVE_REMOTE_EXT,
+ | LM90_HAVE_REMOTE_EXT | LM90_HAVE_FAULTQUEUE,
.alert_alarms = 0x7b,
.max_convrate = 9,
.reg_local_ext = SA56004_REG_LOCAL_TEMPL,
+ .faultqueue_mask = BIT(0),
+ .faultqueue_depth = 3,
},
[tmp451] = {
.flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT
| LM90_HAVE_BROKEN_ALERT | LM90_HAVE_EXTENDED_TEMP | LM90_HAVE_CRIT
| LM90_HAVE_UNSIGNED_TEMP | LM90_HAVE_ALARMS | LM90_HAVE_LOW
- | LM90_HAVE_CONVRATE | LM90_HAVE_REMOTE_EXT,
+ | LM90_HAVE_CONVRATE | LM90_HAVE_REMOTE_EXT | LM90_HAVE_FAULTQUEUE,
.alert_alarms = 0x7c,
.max_convrate = 9,
.resolution = 12,
@@ -617,7 +636,7 @@ static const struct lm90_params lm90_params[] = {
.flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT
| LM90_HAVE_BROKEN_ALERT | LM90_HAVE_EXTENDED_TEMP | LM90_HAVE_CRIT
| LM90_HAVE_ALARMS | LM90_HAVE_LOW | LM90_HAVE_CONVRATE
- | LM90_HAVE_REMOTE_EXT,
+ | LM90_HAVE_REMOTE_EXT | LM90_HAVE_FAULTQUEUE,
.alert_alarms = 0x7c,
.max_convrate = 9,
.resolution = 12,
@@ -684,10 +703,13 @@ struct lm90_data {
u8 reg_status2; /* 2nd status register (optional) */
u8 reg_local_ext; /* local extension register offset */
u8 reg_remote_ext; /* remote temperature low byte */
+ u8 faultqueue_mask; /* fault queue mask */
+ u8 faultqueue_depth; /* fault queue mask */
/* registers values */
u16 temp[TEMP_REG_NUM];
u8 temp_hyst;
+ u8 conalert;
u16 reported_alarms; /* alarms reported as sysfs/udev events */
u16 current_alarms; /* current alarms, reported by chip */
u16 alarms; /* alarms not yet reported to user */
@@ -888,6 +910,26 @@ static int lm90_set_convrate(struct i2c_client *client, struct lm90_data *data,
return err;
}
+static int lm90_set_faultqueue(struct i2c_client *client,
+ struct lm90_data *data, int val)
+{
+ int err;
+
+ if (data->faultqueue_mask) {
+ err = lm90_update_confreg(data, val <= data->faultqueue_depth / 2 ?
+ data->config & ~data->faultqueue_mask :
+ data->config | data->faultqueue_mask);
+ } else {
+ static const u8 values[4] = {0, 2, 6, 0x0e};
+
+ data->conalert = (data->conalert & 0xf1) | values[val - 1];
+ err = lm90_write_reg(data->client, TMP451_REG_CONALERT,
+ data->conalert);
+ }
+
+ return err;
+}
+
static int lm90_update_limits(struct device *dev)
{
struct lm90_data *data = dev_get_drvdata(dev);
@@ -910,6 +952,12 @@ static int lm90_update_limits(struct device *dev)
return val;
data->temp_hyst = val;
}
+ if ((data->flags & LM90_HAVE_FAULTQUEUE) && !data->faultqueue_mask) {
+ val = lm90_read_reg(client, TMP451_REG_CONALERT);
+ if (val < 0)
+ return val;
+ data->conalert = val;
+ }
val = lm90_read16(client, LM90_REG_REMOTE_LOWH,
(data->flags & LM90_HAVE_REM_LIMIT_EXT) ? LM90_REG_REMOTE_LOWL : 0,
@@ -1564,6 +1612,28 @@ static int lm90_chip_read(struct device *dev, u32 attr, int channel, long *val)
case hwmon_chip_alarms:
*val = data->alarms;
break;
+ case hwmon_chip_temp_samples:
+ if (data->faultqueue_mask) {
+ *val = (data->config & data->faultqueue_mask) ?
+ data->faultqueue_depth : 1;
+ } else {
+ switch (data->conalert & 0x0e) {
+ case 0x0:
+ default:
+ *val = 1;
+ break;
+ case 0x2:
+ *val = 2;
+ break;
+ case 0x6:
+ *val = 3;
+ break;
+ case 0xe:
+ *val = 4;
+ break;
+ }
+ }
+ break;
default:
return -EOPNOTSUPP;
}
@@ -1588,6 +1658,9 @@ static int lm90_chip_write(struct device *dev, u32 attr, int channel, long val)
err = lm90_set_convrate(client, data,
clamp_val(val, 0, 100000));
break;
+ case hwmon_chip_temp_samples:
+ err = lm90_set_faultqueue(client, data, clamp_val(val, 1, 4));
+ break;
default:
err = -EOPNOTSUPP;
break;
@@ -1602,6 +1675,7 @@ static umode_t lm90_chip_is_visible(const void *data, u32 attr, int channel)
{
switch (attr) {
case hwmon_chip_update_interval:
+ case hwmon_chip_temp_samples:
return 0644;
case hwmon_chip_alarms:
return 0444;
@@ -2605,7 +2679,8 @@ static int lm90_probe(struct i2c_client *client)
data->chip_config[0] |= HWMON_C_ALARMS;
if (data->flags & LM90_HAVE_CONVRATE)
data->chip_config[0] |= HWMON_C_UPDATE_INTERVAL;
-
+ if (data->flags & LM90_HAVE_FAULTQUEUE)
+ data->chip_config[0] |= HWMON_C_TEMP_SAMPLES;
data->info[1] = &data->temp_info;
info = &data->temp_info;
@@ -2656,6 +2731,8 @@ static int lm90_probe(struct i2c_client *client)
data->channel_config[2] |= HWMON_T_EMERGENCY_ALARM;
}
+ data->faultqueue_mask = lm90_params[data->kind].faultqueue_mask;
+ data->faultqueue_depth = lm90_params[data->kind].faultqueue_depth;
data->reg_local_ext = lm90_params[data->kind].reg_local_ext;
if (data->flags & LM90_HAVE_REMOTE_EXT)
data->reg_remote_ext = LM90_REG_REMOTE_TEMPL;
--
2.35.1
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