From mboxrd@z Thu Jan 1 00:00:00 1970 From: k.kozlowski@samsung.com (Krzysztof Kozlowski) Date: Thu, 04 Dec 2014 11:47:55 +0100 Subject: [PATCH v3 3/3] ARM: dts: exynos5420: Add clock for audss pinctrl (fixing GPIO setup failure) In-Reply-To: <1417690075-13483-1-git-send-email-k.kozlowski@samsung.com> References: <1417690075-13483-1-git-send-email-k.kozlowski@samsung.com> Message-ID: <1417690075-13483-4-git-send-email-k.kozlowski@samsung.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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 --- arch/arm/boot/dts/exynos5420-pinctrl.dtsi | 3 +++ 1 file changed, 3 insertions(+) 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 at 03860000 { + clocks = <&clock CLK_MAU_EPLL>; + clock-names = "block"; + gpz: gpz { gpio-controller; #gpio-cells = <2>; -- 1.9.1