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[v4,6/9] reset: amlogic: add reset status support

Message ID 20240906-meson-rst-aux-v4-6-08824c3d108b@baylibre.com (mailing list archive)
State Superseded
Headers show
Series reset: amlogic: move audio reset drivers out of CCF | expand

Commit Message

Jerome Brunet Sept. 6, 2024, 1:34 p.m. UTC 
Add a callback to check the status of the level reset, as done in
the reset driver of the audio clock controller.

This is done keep the functionality when the audio reset controller
get migrated to meson-reset.

Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
---
 drivers/reset/reset-meson.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)
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Patch

diff --git a/drivers/reset/reset-meson.c b/drivers/reset/reset-meson.c
index e31c1b7c9e4d..af690d3012ec 100644
--- a/drivers/reset/reset-meson.c
+++ b/drivers/reset/reset-meson.c
@@ -68,6 +68,22 @@  static int meson_reset_level(struct reset_controller_dev *rcdev,
 				  BIT(bit), assert ? BIT(bit) : 0);
 }
 
+static int meson_reset_status(struct reset_controller_dev *rcdev,
+			      unsigned long id)
+{
+	struct meson_reset *data =
+		container_of(rcdev, struct meson_reset, rcdev);
+	unsigned int val, offset, bit;
+
+	meson_reset_offset_and_bit(data, id, &offset, &bit);
+	offset += data->param->level_offset;
+
+	regmap_read(data->map, offset, &val);
+	val = !!(BIT(bit) & val);
+
+	return val ^ data->param->level_low_reset;
+}
+
 static int meson_reset_assert(struct reset_controller_dev *rcdev,
 			      unsigned long id)
 {
@@ -84,6 +100,7 @@  static const struct reset_control_ops meson_reset_ops = {
 	.reset		= meson_reset_reset,
 	.assert		= meson_reset_assert,
 	.deassert	= meson_reset_deassert,
+	.status		= meson_reset_status,
 };
 
 static const struct meson_reset_param meson8b_param = {