4.20-stable review patch. If anyone has any objections, please let me know.
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From: Sylwester Nawrocki s.nawrocki@samsung.com
commit 8ac686d7dfed721102860ff2571e6b9f529ae81a upstream.
The assigned parent clocks should be normally specified in the consumer device's DT node, this ensures respective driver always sees correct clock settings when required.
This patch fixes regression in audio subsystem on Odroid XU3/XU4 boards that appeared after commits:
commit 647d04f8e07a ("ASoC: samsung: i2s: Ensure the RCLK rate is properly determined") commit 995e73e55f46 ("ASoC: samsung: i2s: Fix rclk_srcrate handling") commit 48279c53fd1d ("ASoC: samsung: i2s: Prevent external abort on exynos5433 I2S1 access")
Without this patch the driver gets wrong clock as the I2S function clock (op_clk) in probe() and effectively the clock which is finally assigned from DT is not being enabled/disabled in the runtime resume/suspend ops.
Without the above listed commits the EXYNOS_I2S_BUS clock was always set as parent of CLK_I2S_RCLK_SRC regardless of DT settings so there was no issue with not enabled EXYNOS_SCLK_I2S.
Cc: stable@vger.kernel.org # 4.17.x Signed-off-by: Sylwester Nawrocki s.nawrocki@samsung.com Signed-off-by: Krzysztof Kozlowski krzk@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- arch/arm/boot/dts/exynos5422-odroidxu3-audio.dtsi | 9 ++++----- arch/arm/boot/dts/exynos5422-odroidxu4.dts | 9 ++++----- 2 files changed, 8 insertions(+), 10 deletions(-)
--- a/arch/arm/boot/dts/exynos5422-odroidxu3-audio.dtsi +++ b/arch/arm/boot/dts/exynos5422-odroidxu3-audio.dtsi @@ -26,8 +26,7 @@ "Speakers", "SPKL", "Speakers", "SPKR";
- assigned-clocks = <&i2s0 CLK_I2S_RCLK_SRC>, - <&clock CLK_MOUT_EPLL>, + assigned-clocks = <&clock CLK_MOUT_EPLL>, <&clock CLK_MOUT_MAU_EPLL>, <&clock CLK_MOUT_USER_MAU_EPLL>, <&clock_audss EXYNOS_MOUT_AUDSS>, @@ -36,8 +35,7 @@ <&clock_audss EXYNOS_DOUT_AUD_BUS>, <&clock_audss EXYNOS_DOUT_I2S>;
- assigned-clock-parents = <&clock_audss EXYNOS_SCLK_I2S>, - <&clock CLK_FOUT_EPLL>, + assigned-clock-parents = <&clock CLK_FOUT_EPLL>, <&clock CLK_MOUT_EPLL>, <&clock CLK_MOUT_MAU_EPLL>, <&clock CLK_MAU_EPLL>, @@ -48,7 +46,6 @@ <0>, <0>, <0>, - <0>, <196608001>, <(196608002 / 2)>, <196608000>; @@ -84,4 +81,6 @@
&i2s0 { status = "okay"; + assigned-clocks = <&i2s0 CLK_I2S_RCLK_SRC>; + assigned-clock-parents = <&clock_audss EXYNOS_SCLK_I2S>; }; --- a/arch/arm/boot/dts/exynos5422-odroidxu4.dts +++ b/arch/arm/boot/dts/exynos5422-odroidxu4.dts @@ -33,8 +33,7 @@ compatible = "samsung,odroid-xu3-audio"; model = "Odroid-XU4";
- assigned-clocks = <&i2s0 CLK_I2S_RCLK_SRC>, - <&clock CLK_MOUT_EPLL>, + assigned-clocks = <&clock CLK_MOUT_EPLL>, <&clock CLK_MOUT_MAU_EPLL>, <&clock CLK_MOUT_USER_MAU_EPLL>, <&clock_audss EXYNOS_MOUT_AUDSS>, @@ -43,8 +42,7 @@ <&clock_audss EXYNOS_DOUT_AUD_BUS>, <&clock_audss EXYNOS_DOUT_I2S>;
- assigned-clock-parents = <&clock_audss EXYNOS_SCLK_I2S>, - <&clock CLK_FOUT_EPLL>, + assigned-clock-parents = <&clock CLK_FOUT_EPLL>, <&clock CLK_MOUT_EPLL>, <&clock CLK_MOUT_MAU_EPLL>, <&clock CLK_MAU_EPLL>, @@ -55,7 +53,6 @@ <0>, <0>, <0>, - <0>, <196608001>, <(196608002 / 2)>, <196608000>; @@ -79,6 +76,8 @@
&i2s0 { status = "okay"; + assigned-clocks = <&i2s0 CLK_I2S_RCLK_SRC>; + assigned-clock-parents = <&clock_audss EXYNOS_SCLK_I2S>; };
&pwm {