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path: root/drivers/iio/light/us5182d.c
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Diffstat (limited to 'drivers/iio/light/us5182d.c')
-rw-r--r--drivers/iio/light/us5182d.c66
1 files changed, 62 insertions, 4 deletions
diff --git a/drivers/iio/light/us5182d.c b/drivers/iio/light/us5182d.c
index 855f183ba216..e67956c1f296 100644
--- a/drivers/iio/light/us5182d.c
+++ b/drivers/iio/light/us5182d.c
@@ -119,6 +119,9 @@ struct us5182d_data {
u8 opmode;
u8 power_mode;
+ bool als_enabled;
+ bool px_enabled;
+
bool default_continuous;
};
@@ -227,6 +230,50 @@ static int us5182d_set_opmode(struct us5182d_data *data, u8 mode)
return 0;
}
+static int us5182d_als_enable(struct us5182d_data *data)
+{
+ int ret;
+ u8 mode;
+
+ if (data->power_mode == US5182D_ONESHOT)
+ return us5182d_set_opmode(data, US5182D_ALS_ONLY);
+
+ if (data->als_enabled)
+ return 0;
+
+ mode = data->px_enabled ? US5182D_ALS_PX : US5182D_ALS_ONLY;
+
+ ret = us5182d_set_opmode(data, mode);
+ if (ret < 0)
+ return ret;
+
+ data->als_enabled = true;
+
+ return 0;
+}
+
+static int us5182d_px_enable(struct us5182d_data *data)
+{
+ int ret;
+ u8 mode;
+
+ if (data->power_mode == US5182D_ONESHOT)
+ return us5182d_set_opmode(data, US5182D_PX_ONLY);
+
+ if (data->px_enabled)
+ return 0;
+
+ mode = data->als_enabled ? US5182D_ALS_PX : US5182D_PX_ONLY;
+
+ ret = us5182d_set_opmode(data, mode);
+ if (ret < 0)
+ return ret;
+
+ data->px_enabled = true;
+
+ return 0;
+}
+
static int us5182d_shutdown_en(struct us5182d_data *data, u8 state)
{
int ret;
@@ -241,7 +288,16 @@ static int us5182d_shutdown_en(struct us5182d_data *data, u8 state)
ret = ret & ~US5182D_CFG0_SHUTDOWN_EN;
ret = ret | state;
- return i2c_smbus_write_byte_data(data->client, US5182D_REG_CFG0, ret);
+ ret = i2c_smbus_write_byte_data(data->client, US5182D_REG_CFG0, ret);
+ if (ret < 0)
+ return ret;
+
+ if (state & US5182D_CFG0_SHUTDOWN_EN) {
+ data->als_enabled = false;
+ data->px_enabled = false;
+ }
+
+ return ret;
}
static int us5182d_read_raw(struct iio_dev *indio_dev,
@@ -261,7 +317,7 @@ static int us5182d_read_raw(struct iio_dev *indio_dev,
if (ret < 0)
goto out_err;
}
- ret = us5182d_set_opmode(data, US5182D_OPMODE_ALS);
+ ret = us5182d_als_enable(data);
if (ret < 0)
goto out_err;
@@ -278,7 +334,7 @@ static int us5182d_read_raw(struct iio_dev *indio_dev,
if (ret < 0)
goto out_err;
}
- ret = us5182d_set_opmode(data, US5182D_OPMODE_PX);
+ ret = us5182d_px_enable(data);
if (ret < 0)
goto out_err;
@@ -421,6 +477,9 @@ static int us5182d_init(struct iio_dev *indio_dev)
return ret;
}
+ data->als_enabled = true;
+ data->px_enabled = true;
+
if (!data->default_continuous) {
ret = us5182d_shutdown_en(data, US5182D_CFG0_SHUTDOWN_EN);
if (ret < 0)
@@ -428,7 +487,6 @@ static int us5182d_init(struct iio_dev *indio_dev)
data->power_mode = US5182D_ONESHOT;
}
-
return ret;
}