[PATCH v4 1/4] iio: vcnl4000: Factorize data reading and writing.

Mathieu Othacehe
2020-04-21T07:55:56Z

Factorize data reading in vcnl4000_measure into a vcnl4000_read_data
function. Also add a vcnl4000_write_data function.

Signed-off-by: Mathieu Othacehe <m.othacehe@gmail.com>
---
drivers/iio/light/vcnl4000.c | 29 +++++++++++++++++++++++++----
1 file changed, 25 insertions(+), 4 deletions(-)

diff --git a/drivers/iio/light/vcnl4000.c b/drivers/iio/light/vcnl4000.c
index 58e97462e803..695a81e95d8d 100644
--- a/drivers/iio/light/vcnl4000.c
+++ b/drivers/iio/light/vcnl4000.c
@@ -215,11 +215,34 @@ static int vcnl4200_init(struct vcnl4000_data *data)
return 0;
};

+static int vcnl4000_read_data(struct vcnl4000_data *data, u8 data_reg, int *val)
+{
+ s32 ret;
+
+ ret = i2c_smbus_read_word_data(data->client, data_reg);
+ if (ret < 0)
+ return ret;
+
+ *val = be16_to_cpu(ret);
+ return 0;
+}
+
+static int vcnl4000_write_data(struct vcnl4000_data *data, u8 data_reg, int val)
+{
+ __be16 be_val;
+
+ if (val > U16_MAX)
+ return -ERANGE;
+
+ be_val = cpu_to_be16(val);
+ return i2c_smbus_write_word_data(data->client, data_reg, be_val);
+}
+
+
static int vcnl4000_measure(struct vcnl4000_data *data, u8 req_mask,
u8 rdy_mask, u8 data_reg, int *val)
{
int tries = 20;
- __be16 buf;
int ret;

mutex_lock(&data->vcnl4000_lock);
@@ -246,13 +269,11 @@ static int vcnl4000_measure(struct vcnl4000_data *data, u8 req_mask,
goto fail;
}

- ret = i2c_smbus_read_i2c_block_data(data->client,
- data_reg, sizeof(buf), (u8 *) &buf);
+ ret = vcnl4000_read_data(data, data_reg, val);
if (ret < 0)
goto fail;

mutex_unlock(&data->vcnl4000_lock);
- *val = be16_to_cpu(buf);

return 0;

--
2.26.0