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Code Issues Releases Wiki Activity

phy: amlogic: phy-meson-gxl-usb2: fix shared reset controller use

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Use reset_control_rearm() call if an error occurs in case
phy_meson_gxl_usb2_init() fails after reset() has been called ; or in case
phy_meson_gxl_usb2_exit() is called i.e the resource is no longer used
and the reset line may be triggered again by other devices.

reset_control_rearm() keeps use of triggered_count sane in the reset
framework. Therefore, use of reset_control_reset() on shared reset line
should be balanced with reset_control_rearm().

Signed-off-by: Amjad Ouled-Ameur <aouledameur@baylibre.com>
Reported-by: Jerome Brunet <jbrunet@baylibre.com>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Neil Armstrong <narmstrong@baylibre.com>
Link: https://lore.kernel.org/r/20220111095255.176141-2-aouledameur@baylibre.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Amjad Ouled-Ameur 2022-01-11 10:52:53 +01:00 committed by Vinod Koul
parent 3d565bd6fb
commit 2f87727130
1 changed files with 4 additions and 1 deletions
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5
drivers/phy/amlogic/phy-meson-gxl-usb2.c
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@ -114,8 +114,10 @@ static int phy_meson_gxl_usb2_init(struct phy *phy)
return ret;
ret = clk_prepare_enable(priv->clk);
if (ret)
if (ret) {
reset_control_rearm(priv->reset);
return ret;
}
return 0;
}
@ -125,6 +127,7 @@ static int phy_meson_gxl_usb2_exit(struct phy *phy)
struct phy_meson_gxl_usb2_priv *priv = phy_get_drvdata(phy);
clk_disable_unprepare(priv->clk);
reset_control_rearm(priv->reset);
return 0;
}