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[v4,3/3] ARM: dts: exynos5420: Add clock for audss pinctrl (fixing GPIO setup failure)

Message ID 1417777254-26579-4-git-send-email-k.kozlowski@samsung.com
State Not Applicable
Headers show

Commit Message

Krzysztof Kozlowski Dec. 5, 2014, 11 a.m. UTC 
The pinctrl for audio subsystem needs 'mau_epll' clock to be enabled in
order to properly access memory during GPIO setup.

After introducing runtime PM to pl330 DMA driver the 'mau_epll' was
gated, because the "amba" clock was disabled and there were no more
users of mau_epll.

This lead to system hang just before probing i2s0 because
samsung_pinmux_setup() tried to access memory from audss block which was
gated.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Tested-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
---
 arch/arm/boot/dts/exynos5420-pinctrl.dtsi | 3 +++
 1 file changed, 3 insertions(+)
diff mbox

Patch

diff --git a/arch/arm/boot/dts/exynos5420-pinctrl.dtsi b/arch/arm/boot/dts/exynos5420-pinctrl.dtsi
index ba686e40eac7..c0ca0da36ade 100644
--- a/arch/arm/boot/dts/exynos5420-pinctrl.dtsi
+++ b/arch/arm/boot/dts/exynos5420-pinctrl.dtsi
@@ -696,6 +696,9 @@ 
 	};
 
 	pinctrl@03860000 {
+		clocks = <&clock CLK_MAU_EPLL>;
+		clock-names = "block";
+
 		gpz: gpz {
 			gpio-controller;
 			#gpio-cells = <2>;