diff options
author | Tim Harvey <tharvey@gateworks.com> | 2020-08-27 13:04:54 -0700 |
---|---|---|
committer | Guenter Roeck <linux@roeck-us.net> | 2020-09-23 09:42:41 -0700 |
commit | 7497d4a66c596fc8312cafe1b8d1e76ad2bc34c3 (patch) | |
tree | e72801e2b1aab03659f18108064a8dec5f0b1950 /drivers/hwmon/gsc-hwmon.c | |
parent | d6144a40041a70ecce410a07d3a2b6906f6e7da9 (diff) | |
download | linux-7497d4a66c596fc8312cafe1b8d1e76ad2bc34c3.tar.gz linux-7497d4a66c596fc8312cafe1b8d1e76ad2bc34c3.tar.bz2 linux-7497d4a66c596fc8312cafe1b8d1e76ad2bc34c3.zip |
hwmon: (gsc-hwmon) add fan sensor
Add a fan sensor to report RPM's from a fan tach input.
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'drivers/hwmon/gsc-hwmon.c')
-rw-r--r-- | drivers/hwmon/gsc-hwmon.c | 32 |
1 files changed, 29 insertions, 3 deletions
diff --git a/drivers/hwmon/gsc-hwmon.c b/drivers/hwmon/gsc-hwmon.c index c6d4567f3952..1fe37418ff46 100644 --- a/drivers/hwmon/gsc-hwmon.c +++ b/drivers/hwmon/gsc-hwmon.c @@ -17,6 +17,7 @@ #define GSC_HWMON_MAX_TEMP_CH 16 #define GSC_HWMON_MAX_IN_CH 16 +#define GSC_HWMON_MAX_FAN_CH 16 #define GSC_HWMON_RESOLUTION 12 #define GSC_HWMON_VREF 2500 @@ -27,11 +28,14 @@ struct gsc_hwmon_data { struct regmap *regmap; const struct gsc_hwmon_channel *temp_ch[GSC_HWMON_MAX_TEMP_CH]; const struct gsc_hwmon_channel *in_ch[GSC_HWMON_MAX_IN_CH]; + const struct gsc_hwmon_channel *fan_ch[GSC_HWMON_MAX_FAN_CH]; u32 temp_config[GSC_HWMON_MAX_TEMP_CH + 1]; u32 in_config[GSC_HWMON_MAX_IN_CH + 1]; + u32 fan_config[GSC_HWMON_MAX_FAN_CH + 1]; struct hwmon_channel_info temp_info; struct hwmon_channel_info in_info; - const struct hwmon_channel_info *info[3]; + struct hwmon_channel_info fan_info; + const struct hwmon_channel_info *info[4]; struct hwmon_chip_info chip; }; @@ -155,6 +159,9 @@ gsc_hwmon_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, case hwmon_temp: ch = hwmon->temp_ch[channel]; break; + case hwmon_fan: + ch = hwmon->fan_ch[channel]; + break; default: return -EOPNOTSUPP; } @@ -187,6 +194,9 @@ gsc_hwmon_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, /* adjust by uV offset */ tmp += ch->mvoffset; break; + case mode_fan: + tmp *= 30; /* convert to revolutions per minute */ + break; case mode_voltage_24bit: case mode_voltage_16bit: /* no adjustment needed */ @@ -211,6 +221,9 @@ gsc_hwmon_read_string(struct device *dev, enum hwmon_sensor_types type, case hwmon_temp: *buf = hwmon->temp_ch[channel]->name; break; + case hwmon_fan: + *buf = hwmon->fan_ch[channel]->name; + break; default: return -ENOTSUPP; } @@ -304,7 +317,7 @@ static int gsc_hwmon_probe(struct platform_device *pdev) struct gsc_hwmon_platform_data *pdata = dev_get_platdata(dev); struct gsc_hwmon_data *hwmon; const struct attribute_group **groups; - int i, i_in, i_temp; + int i, i_in, i_temp, i_fan; if (!pdata) { pdata = gsc_hwmon_get_devtree_pdata(dev); @@ -324,7 +337,7 @@ static int gsc_hwmon_probe(struct platform_device *pdev) if (IS_ERR(hwmon->regmap)) return PTR_ERR(hwmon->regmap); - for (i = 0, i_in = 0, i_temp = 0; i < hwmon->pdata->nchannels; i++) { + for (i = 0, i_in = 0, i_temp = 0, i_fan = 0; i < hwmon->pdata->nchannels; i++) { const struct gsc_hwmon_channel *ch = &pdata->channels[i]; switch (ch->mode) { @@ -338,6 +351,16 @@ static int gsc_hwmon_probe(struct platform_device *pdev) HWMON_T_LABEL; i_temp++; break; + case mode_fan: + if (i_fan == GSC_HWMON_MAX_FAN_CH) { + dev_err(gsc->dev, "too many fan channels\n"); + return -EINVAL; + } + hwmon->fan_ch[i_fan] = ch; + hwmon->fan_config[i_fan] = HWMON_F_INPUT | + HWMON_F_LABEL; + i_fan++; + break; case mode_voltage_24bit: case mode_voltage_16bit: case mode_voltage_raw: @@ -361,10 +384,13 @@ static int gsc_hwmon_probe(struct platform_device *pdev) hwmon->chip.info = hwmon->info; hwmon->info[0] = &hwmon->temp_info; hwmon->info[1] = &hwmon->in_info; + hwmon->info[2] = &hwmon->fan_info; hwmon->temp_info.type = hwmon_temp; hwmon->temp_info.config = hwmon->temp_config; hwmon->in_info.type = hwmon_in; hwmon->in_info.config = hwmon->in_config; + hwmon->fan_info.type = hwmon_fan; + hwmon->fan_info.config = hwmon->fan_config; groups = pdata->fan_base ? gsc_hwmon_groups : NULL; hwmon_dev = devm_hwmon_device_register_with_info(dev, |