[PATCH v6] iio: humidity: ens210: Simplify I2C functionality check

[Salah Triki <salah.triki@gmail.com>]

Simplify the I2C functionality check by checking for I2C_FUNC_SMBUS_EMUL,
which encompasses the SMBus operations required by the driver.

Signed-off-by: Salah Triki <salah.triki@gmail.com>
---
Changes since v5:
- Changed patch title from "Fix missing I2C functionality checks" to
  "Simplify I2C functionality check" to reflect the new approach.
- Dropped the Fixes tag as the change is now considered hardening rather 
  than a bug fix.
- Replaced individual functionality checks with a single check for 
  I2C_FUNC_SMBUS_EMUL as suggested by Jonathan Cameron.

Changes since v4:
- Fixed the alignment and indentation of the I2C functionality check
  per Andy's review.

Changes since v3:
- Fixed the alignment and indentation of the I2C functionality check
  per Andy's review.

Changes since v2:
- Fixed the alignment and indentation of the I2C functionality check
  per Maxime's review.

Changes since v1:
- Updated the I2C functionality test to check for both required native
  operations and SMBus emulation (`I2C_FUNC_SMBUS_EMUL`) 

 drivers/iio/humidity/ens210.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/iio/humidity/ens210.c b/drivers/iio/humidity/ens210.c
index 77418d97f30d..91c2f69fb6bf 100644
--- a/drivers/iio/humidity/ens210.c
+++ b/drivers/iio/humidity/ens210.c
@@ -201,10 +201,7 @@ static int ens210_probe(struct i2c_client *client)
 	uint16_t part_id;
 	int ret;
 
-	if (!i2c_check_functionality(client->adapter,
-				     I2C_FUNC_SMBUS_WRITE_BYTE_DATA |
-				     I2C_FUNC_SMBUS_WRITE_BYTE |
-				     I2C_FUNC_SMBUS_READ_I2C_BLOCK)) {
+	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_EMUL)) {
 		return dev_err_probe(&client->dev, -EOPNOTSUPP,
 			"adapter does not support some i2c transactions\n");
 	}
-- 
2.43.0