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@phrozen.org>
---
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