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authorGuenter Roeck <linux@roeck-us.net>2015-02-12 15:11:38 (GMT)
committerGuenter Roeck <linux@roeck-us.net>2015-03-09 16:59:35 (GMT)
commit9faf28ca4beb24cd5a01f38c5655f5ae92d834ba (patch)
tree2938de3eb380b02ae898684e2f9171e8fbfe3cf5 /drivers/hwmon/it87.c
parentfd044868e8056720b52d41bb61da0fbf7f04fd50 (diff)
downloadlinux-9faf28ca4beb24cd5a01f38c5655f5ae92d834ba.tar.xz
hwmon: (it87) Add feature flags for fans count and 16-bit fan configuration
Fans 4-5 are not supported on all chips and revisions. Also, 16-bit fan counters are always enabled on some chips. Provide feature flags to simplify adding support for new chips. Reviewed-by: Jean Delvare <jdelvare@suse.de> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'drivers/hwmon/it87.c')
-rw-r--r--drivers/hwmon/it87.c69
1 files changed, 36 insertions, 33 deletions
diff --git a/drivers/hwmon/it87.c b/drivers/hwmon/it87.c
index e8cbefb..48b4893 100644
--- a/drivers/hwmon/it87.c
+++ b/drivers/hwmon/it87.c
@@ -252,6 +252,8 @@ struct it87_devices {
#define FEAT_TEMP_OFFSET (1 << 4)
#define FEAT_TEMP_PECI (1 << 5)
#define FEAT_TEMP_OLD_PECI (1 << 6)
+#define FEAT_FAN16_CONFIG (1 << 7) /* Need to enable 16-bit fans */
+#define FEAT_FIVE_FANS (1 << 8) /* Supports five fans */
static const struct it87_devices it87_devices[] = {
[it87] = {
@@ -264,67 +266,71 @@ static const struct it87_devices it87_devices[] = {
},
[it8716] = {
.name = "it8716",
- .features = FEAT_16BIT_FANS | FEAT_TEMP_OFFSET,
+ .features = FEAT_16BIT_FANS | FEAT_TEMP_OFFSET
+ | FEAT_FAN16_CONFIG | FEAT_FIVE_FANS,
},
[it8718] = {
.name = "it8718",
.features = FEAT_16BIT_FANS | FEAT_TEMP_OFFSET
- | FEAT_TEMP_OLD_PECI,
+ | FEAT_TEMP_OLD_PECI | FEAT_FAN16_CONFIG | FEAT_FIVE_FANS,
.old_peci_mask = 0x4,
},
[it8720] = {
.name = "it8720",
.features = FEAT_16BIT_FANS | FEAT_TEMP_OFFSET
- | FEAT_TEMP_OLD_PECI,
+ | FEAT_TEMP_OLD_PECI | FEAT_FAN16_CONFIG | FEAT_FIVE_FANS,
.old_peci_mask = 0x4,
},
[it8721] = {
.name = "it8721",
.features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
- | FEAT_TEMP_OFFSET | FEAT_TEMP_OLD_PECI | FEAT_TEMP_PECI,
+ | FEAT_TEMP_OFFSET | FEAT_TEMP_OLD_PECI | FEAT_TEMP_PECI
+ | FEAT_FAN16_CONFIG | FEAT_FIVE_FANS,
.peci_mask = 0x05,
.old_peci_mask = 0x02, /* Actually reports PCH */
},
[it8728] = {
.name = "it8728",
.features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
- | FEAT_TEMP_OFFSET | FEAT_TEMP_PECI,
+ | FEAT_TEMP_OFFSET | FEAT_TEMP_PECI | FEAT_FIVE_FANS,
.peci_mask = 0x07,
},
[it8771] = {
.name = "it8771",
.features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
| FEAT_TEMP_OFFSET | FEAT_TEMP_PECI,
- /* PECI: guesswork */
- /* 12mV ADC (OHM) */
- /* 16 bit fans (OHM) */
+ /* PECI: guesswork */
+ /* 12mV ADC (OHM) */
+ /* 16 bit fans (OHM) */
+ /* three fans, always 16 bit (guesswork) */
.peci_mask = 0x07,
},
[it8772] = {
.name = "it8772",
.features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
| FEAT_TEMP_OFFSET | FEAT_TEMP_PECI,
- /* PECI (coreboot) */
- /* 12mV ADC (HWSensors4, OHM) */
- /* 16 bit fans (HWSensors4, OHM) */
+ /* PECI (coreboot) */
+ /* 12mV ADC (HWSensors4, OHM) */
+ /* 16 bit fans (HWSensors4, OHM) */
+ /* three fans, always 16 bit (datasheet) */
.peci_mask = 0x07,
},
[it8781] = {
.name = "it8781",
.features = FEAT_16BIT_FANS | FEAT_TEMP_OFFSET
- | FEAT_TEMP_OLD_PECI,
+ | FEAT_TEMP_OLD_PECI | FEAT_FAN16_CONFIG,
.old_peci_mask = 0x4,
},
[it8782] = {
.name = "it8782",
.features = FEAT_16BIT_FANS | FEAT_TEMP_OFFSET
- | FEAT_TEMP_OLD_PECI,
+ | FEAT_TEMP_OLD_PECI | FEAT_FAN16_CONFIG,
.old_peci_mask = 0x4,
},
[it8783] = {
.name = "it8783",
.features = FEAT_16BIT_FANS | FEAT_TEMP_OFFSET
- | FEAT_TEMP_OLD_PECI,
+ | FEAT_TEMP_OLD_PECI | FEAT_FAN16_CONFIG,
.old_peci_mask = 0x4,
},
[it8603] = {
@@ -345,6 +351,8 @@ static const struct it87_devices it87_devices[] = {
#define has_temp_old_peci(data, nr) \
(((data)->features & FEAT_TEMP_OLD_PECI) && \
((data)->old_peci_mask & (1 << nr)))
+#define has_fan16_config(data) ((data)->features & FEAT_FAN16_CONFIG)
+#define has_five_fans(data) ((data)->features & FEAT_FIVE_FANS)
struct it87_sio_data {
enum chips type;
@@ -2124,13 +2132,14 @@ static int it87_probe(struct platform_device *pdev)
case it87:
if (sio_data->revision >= 0x03) {
data->features &= ~FEAT_OLD_AUTOPWM;
- data->features |= FEAT_16BIT_FANS;
+ data->features |= FEAT_FAN16_CONFIG | FEAT_16BIT_FANS;
}
break;
case it8712:
if (sio_data->revision >= 0x08) {
data->features &= ~FEAT_OLD_AUTOPWM;
- data->features |= FEAT_16BIT_FANS;
+ data->features |= FEAT_FAN16_CONFIG | FEAT_16BIT_FANS |
+ FEAT_FIVE_FANS;
}
break;
default:
@@ -2463,12 +2472,8 @@ static void it87_init_device(struct platform_device *pdev)
}
data->has_fan = (data->fan_main_ctrl >> 4) & 0x07;
- /*
- * Set tachometers to 16-bit mode if needed. IT8603E, IT8728F,
- * IT8771E (guesswork), and IT8772E have it by default.
- */
- if (has_16bit_fans(data) && data->type != it8603 && data->type != it8728
- && data->type != it8771 && data->type != it8772) {
+ /* Set tachometers to 16-bit mode if needed */
+ if (has_fan16_config(data)) {
tmp = it87_read_value(data, IT87_REG_FAN_16BIT);
if (~tmp & 0x07 & data->has_fan) {
dev_dbg(&pdev->dev,
@@ -2476,17 +2481,15 @@ static void it87_init_device(struct platform_device *pdev)
it87_write_value(data, IT87_REG_FAN_16BIT,
tmp | 0x07);
}
- /*
- * IT8705F, IT8781F, IT8782F, and IT8783E/F only support
- * three fans.
- */
- if (data->type != it87 && data->type != it8781 &&
- data->type != it8782 && data->type != it8783) {
- if (tmp & (1 << 4))
- data->has_fan |= (1 << 3); /* fan4 enabled */
- if (tmp & (1 << 5))
- data->has_fan |= (1 << 4); /* fan5 enabled */
- }
+ }
+
+ /* Check for additional fans */
+ if (has_five_fans(data)) {
+ tmp = it87_read_value(data, IT87_REG_FAN_16BIT);
+ if (tmp & (1 << 4))
+ data->has_fan |= (1 << 3); /* fan4 enabled */
+ if (tmp & (1 << 5))
+ data->has_fan |= (1 << 4); /* fan5 enabled */
}
/* Fan input pins may be used for alternative functions */