| Message ID | 1479301615-11240-2-git-send-email-m.szyprowski@samsung.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
Hi Marek, 2016-11-16 22:06 GMT+09:00 Marek Szyprowski <m.szyprowski@samsung.com>: > This patch corrects FSYS CMU parent clocks specified in clock controller > node to let improved Exynos 5433 clocks driver to control proper clocks > on FSYS<->TOP CMU boundary. > > Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> > --- > arch/arm64/boot/dts/exynos/exynos5433.dtsi | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/arch/arm64/boot/dts/exynos/exynos5433.dtsi b/arch/arm64/boot/dts/exynos/exynos5433.dtsi > index 1188630..6564875 100644 > --- a/arch/arm64/boot/dts/exynos/exynos5433.dtsi > +++ b/arch/arm64/boot/dts/exynos/exynos5433.dtsi > @@ -312,7 +312,7 @@ > > clock-names = "oscclk", > "sclk_ufs_mphy", > - "div_aclk_fsys_200", > + "aclk_fsys_200", FSYS cmu doesn't use the "aclk_fsys_200" clock as parent clock. When I check the clk-exynos5433.c driver, CLK_MOUT_ACLK_FSYS_200_USER mux in the FSYS cmu uses the "div_aclk_fsys_200" clock as parent clock instead of "aclk_fsys_200". > "sclk_pcie_100_fsys", > "sclk_ufsunipro_fsys", > "sclk_mmc2_fsys", > @@ -322,7 +322,7 @@ > "sclk_usbdrd30_fsys"; > clocks = <&xxti>, > <&cmu_cpif CLK_SCLK_UFS_MPHY>, > - <&cmu_top CLK_DIV_ACLK_FSYS_200>, > + <&cmu_top CLK_ACLK_FSYS_200>, > <&cmu_top CLK_SCLK_PCIE_100_FSYS>, > <&cmu_top CLK_SCLK_UFSUNIPRO_FSYS>, > <&cmu_top CLK_SCLK_MMC2_FSYS>, > -- > 1.9.1 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html Best Regards, Chanwoo Choi -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Hi Chanwoo, On 2016-11-16 17:31, Chanwoo Choi wrote: > Hi Marek, > > 2016-11-16 22:06 GMT+09:00 Marek Szyprowski <m.szyprowski@samsung.com>: >> This patch corrects FSYS CMU parent clocks specified in clock controller >> node to let improved Exynos 5433 clocks driver to control proper clocks >> on FSYS<->TOP CMU boundary. >> >> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> >> --- >> arch/arm64/boot/dts/exynos/exynos5433.dtsi | 4 ++-- >> 1 file changed, 2 insertions(+), 2 deletions(-) >> >> diff --git a/arch/arm64/boot/dts/exynos/exynos5433.dtsi b/arch/arm64/boot/dts/exynos/exynos5433.dtsi >> index 1188630..6564875 100644 >> --- a/arch/arm64/boot/dts/exynos/exynos5433.dtsi >> +++ b/arch/arm64/boot/dts/exynos/exynos5433.dtsi >> @@ -312,7 +312,7 @@ >> >> clock-names = "oscclk", >> "sclk_ufs_mphy", >> - "div_aclk_fsys_200", >> + "aclk_fsys_200", > FSYS cmu doesn't use the "aclk_fsys_200" clock as parent clock. > > When I check the clk-exynos5433.c driver, CLK_MOUT_ACLK_FSYS_200_USER > mux in the FSYS cmu > uses the "div_aclk_fsys_200" clock as parent clock instead of "aclk_fsys_200". Then this is a bug in clk-exynos5433.c driver. aclk_fsys_200 is the correct parent for CLK_MOUT_ACLK_FSYS_200_USER mux. See page 582 and 814 (CLK_MUX_SEL_FSYS0 register description) of Exynos 5433 User Manual (rev 0.10). Also my experiments revealed that aclk_fsys_200 gate register (CLK_ACLK_FSYS_200 clk) has to be enabled to do any operation on devices in FSYS block, so this is definitely the clock that is a parent of the whole block. I will prepare a fix for clk-exynos5433.c driver and dt bindings docs too. > >> "sclk_pcie_100_fsys", >> "sclk_ufsunipro_fsys", >> "sclk_mmc2_fsys", >> @@ -322,7 +322,7 @@ >> "sclk_usbdrd30_fsys"; >> clocks = <&xxti>, >> <&cmu_cpif CLK_SCLK_UFS_MPHY>, >> - <&cmu_top CLK_DIV_ACLK_FSYS_200>, >> + <&cmu_top CLK_ACLK_FSYS_200>, >> <&cmu_top CLK_SCLK_PCIE_100_FSYS>, >> <&cmu_top CLK_SCLK_UFSUNIPRO_FSYS>, >> <&cmu_top CLK_SCLK_MMC2_FSYS>, >> -- >> 1.9.1 >> >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in >> the body of a message to majordomo@vger.kernel.org >> More majordomo info at http://vger.kernel.org/majordomo-info.html > Best Regards, > Chanwoo Choi > > > Best regards
diff --git a/arch/arm64/boot/dts/exynos/exynos5433.dtsi b/arch/arm64/boot/dts/exynos/exynos5433.dtsi index 1188630..6564875 100644 --- a/arch/arm64/boot/dts/exynos/exynos5433.dtsi +++ b/arch/arm64/boot/dts/exynos/exynos5433.dtsi @@ -312,7 +312,7 @@ clock-names = "oscclk", "sclk_ufs_mphy", - "div_aclk_fsys_200", + "aclk_fsys_200", "sclk_pcie_100_fsys", "sclk_ufsunipro_fsys", "sclk_mmc2_fsys", @@ -322,7 +322,7 @@ "sclk_usbdrd30_fsys"; clocks = <&xxti>, <&cmu_cpif CLK_SCLK_UFS_MPHY>, - <&cmu_top CLK_DIV_ACLK_FSYS_200>, + <&cmu_top CLK_ACLK_FSYS_200>, <&cmu_top CLK_SCLK_PCIE_100_FSYS>, <&cmu_top CLK_SCLK_UFSUNIPRO_FSYS>, <&cmu_top CLK_SCLK_MMC2_FSYS>,
This patch corrects FSYS CMU parent clocks specified in clock controller node to let improved Exynos 5433 clocks driver to control proper clocks on FSYS<->TOP CMU boundary. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> --- arch/arm64/boot/dts/exynos/exynos5433.dtsi | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)