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Commit 5da672cf authored by Chen-Yu Tsai's avatar Chen-Yu Tsai Committed by Maxime Ripard
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clk: sunxi-ng: Implement reset control status readback



Until now we were not providing a way to read back the status of our
reset controls. Consumers had no real way to be certain whether a
peripheral was held in reset or not.

Implement the status callback to complete the API support.

Fixes: 1d80c142 ("clk: sunxi-ng: Add common infrastructure")
Signed-off-by: default avatarChen-Yu Tsai <wens@csie.org>
Signed-off-by: default avatarMaxime Ripard <maxime.ripard@free-electrons.com>
parent a894990a
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+14 −0
Original line number Diff line number Diff line
@@ -60,8 +60,22 @@ static int ccu_reset_reset(struct reset_controller_dev *rcdev,
	return 0;
}

static int ccu_reset_status(struct reset_controller_dev *rcdev,
			    unsigned long id)
{
	struct ccu_reset *ccu = rcdev_to_ccu_reset(rcdev);
	const struct ccu_reset_map *map = &ccu->reset_map[id];

	/*
	 * The reset control API expects 0 if reset is not asserted,
	 * which is the opposite of what our hardware uses.
	 */
	return !(map->bit & readl(ccu->base + map->reg));
}

const struct reset_control_ops ccu_reset_ops = {
	.assert		= ccu_reset_assert,
	.deassert	= ccu_reset_deassert,
	.reset		= ccu_reset_reset,
	.status		= ccu_reset_status,
};