hwmon: (gsc) add 16bit pre-scaled voltage mode

add a 16-bit pre-scaled voltage mode to adc and clarify that existing
pre-scaled mode is 24bit.

Signed-off-by: Tim Harvey <tharvey@gateworks.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/1591714640-10332-3-git-send-email-tharvey@gateworks.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

diff --git a/drivers/hwmon/gsc-hwmon.c b/drivers/hwmon/gsc-hwmon.c
index 2137bc6..3dfe2ca 100644 (file)
--- a/drivers/hwmon/gsc-hwmon.c
+++ b/drivers/hwmon/gsc-hwmon.c
@@ -159,7 +159,7 @@ gsc_hwmon_read(struct device *dev, enum hwmon_sensor_types type, u32 attr,
                return -EOPNOTSUPP;
        }
 
-       sz = (ch->mode == mode_voltage) ? 3 : 2;
+       sz = (ch->mode == mode_voltage_24bit) ? 3 : 2;
        ret = regmap_bulk_read(hwmon->regmap, ch->reg, buf, sz);
        if (ret)
                return ret;
@@ -186,7 +186,8 @@ gsc_hwmon_read(struct device *dev, enum hwmon_sensor_types type, u32 attr,
                /* adjust by uV offset */
                tmp += ch->mvoffset;
                break;
-       case mode_voltage:
+       case mode_voltage_24bit:
+       case mode_voltage_16bit:
                /* no adjustment needed */
                break;
        }
@@ -336,7 +337,8 @@ static int gsc_hwmon_probe(struct platform_device *pdev)
                                                     HWMON_T_LABEL;
                        i_temp++;
                        break;
-               case mode_voltage:
+               case mode_voltage_24bit:
+               case mode_voltage_16bit:
                case mode_voltage_raw:
                        if (i_in == GSC_HWMON_MAX_IN_CH) {
                                dev_err(gsc->dev, "too many input channels\n");

diff --git a/include/linux/platform_data/gsc_hwmon.h b/include/linux/platform_data/gsc_hwmon.h
index ec1611a..37a8f55 100644 (file)
--- a/include/linux/platform_data/gsc_hwmon.h
+++ b/include/linux/platform_data/gsc_hwmon.h
@@ -4,8 +4,9 @@
 
 enum gsc_hwmon_mode {
        mode_temperature,
-       mode_voltage,
+       mode_voltage_24bit,
        mode_voltage_raw,
+       mode_voltage_16bit,
        mode_max,
 };