[PATCH 2/2] clk: en7523: add a reset operation

[John Crispin]

The reset controller implements assert, deassert and status but not
reset, so device_reset() fails with -ENOTSUPP. The i2c-mt7621 driver
calls it at probe and after a transfer timeout. Every I2C bus that
references an SCU reset, as on the EN7581 and the AN7589, therefore
logs "I2C reset failed!" and is never reset.

Add a reset operation that asserts and then deasserts the line, as the
MT7621 reset controller does for the same I2C block.

Signed-off-by: John Crispin <john@xxxxxxxxxxx>
---
 drivers/clk/clk-en7523.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/clk/clk-en7523.c b/drivers/clk/clk-en7523.c
index 8f63482cbb7b..eb893259d470 100644
--- a/drivers/clk/clk-en7523.c
+++ b/drivers/clk/clk-en7523.c
@@ -818,6 +818,18 @@ static int en7523_reset_deassert(struct reset_controller_dev *rcdev,
 	return en7523_reset_update(rcdev, id, false);
 }
 
+static int en7523_reset_reset(struct reset_controller_dev *rcdev,
+			      unsigned long id)
+{
+	int ret;
+
+	ret = en7523_reset_assert(rcdev, id);
+	if (ret)
+		return ret;
+
+	return en7523_reset_deassert(rcdev, id);
+}
+
 static int en7523_reset_status(struct reset_controller_dev *rcdev,
 			       unsigned long id)
 {
@@ -847,6 +859,7 @@ static int en7523_reset_xlate(struct reset_controller_dev *rcdev,
 }
 
 static const struct reset_control_ops en7581_reset_ops = {
+	.reset = en7523_reset_reset,
 	.assert = en7523_reset_assert,
 	.deassert = en7523_reset_deassert,
 	.status = en7523_reset_status,
-- 
2.34.1