Message ID | 20200830135200.24304-6-krzk@kernel.org (mailing list archive) |
---|---|
State | Accepted |
Headers | show |
Series | [01/33] ARM: dts: exynos: Silence i2c-gpio dtschema warning in Galaxy I9100 | expand |
On 30.08.2020 15:51, Krzysztof Kozlowski wrote: > The S3C RTC requires 32768 Hz clock as input which is provided by PMIC. > However there is no clock provided for the PMIC and the driver registers > the clock as regulator. This is an old driver which will not be updated > so add a workaround - add a fixed-clock to fill missing clock phandle > reference in S3C RTC. The "clock" regulator in PMIC is already present > and enabled. > > This allows to enable the S3C RTC and fixes dtbs_check warnings: > > arch/arm/boot/dts/exynos4210-universal_c210.dt.yaml: rtc@10070000: clocks: [[5, 346]] is too short > arch/arm/boot/dts/exynos4210-universal_c210.dt.yaml: rtc@10070000: clock-names: ['rtc'] is too short > > Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Confirmed, this workaround enables s3c-rtc driver operation on this board. Tested-by: Marek Szyprowski <m.szyprowski@samsung.com> > --- > arch/arm/boot/dts/exynos4210-universal_c210.dts | 13 +++++++++++++ > 1 file changed, 13 insertions(+) > > diff --git a/arch/arm/boot/dts/exynos4210-universal_c210.dts b/arch/arm/boot/dts/exynos4210-universal_c210.dts > index 99ce53b120ac..9479e41bdc2a 100644 > --- a/arch/arm/boot/dts/exynos4210-universal_c210.dts > +++ b/arch/arm/boot/dts/exynos4210-universal_c210.dts > @@ -39,6 +39,13 @@ > compatible = "samsung,clock-xusbxti"; > clock-frequency = <24000000>; > }; > + > + pmic_ap_clk: pmic-ap-clk { > + /* Workaround for missing clock on PMIC */ > + compatible = "fixed-clock"; > + #clock-cells = <0>; > + clock-frequency = <32768>; > + }; > }; > > vemmc_reg: voltage-regulator { > @@ -537,6 +544,12 @@ > status = "okay"; > }; > > +&rtc { > + status = "okay"; > + clocks = <&clock CLK_RTC>, <&pmic_ap_clk>; > + clock-names = "rtc", "rtc_src"; > +}; > + > &sdhci_0 { > bus-width = <8>; > non-removable; Best regards
diff --git a/arch/arm/boot/dts/exynos4210-universal_c210.dts b/arch/arm/boot/dts/exynos4210-universal_c210.dts index 99ce53b120ac..9479e41bdc2a 100644 --- a/arch/arm/boot/dts/exynos4210-universal_c210.dts +++ b/arch/arm/boot/dts/exynos4210-universal_c210.dts @@ -39,6 +39,13 @@ compatible = "samsung,clock-xusbxti"; clock-frequency = <24000000>; }; + + pmic_ap_clk: pmic-ap-clk { + /* Workaround for missing clock on PMIC */ + compatible = "fixed-clock"; + #clock-cells = <0>; + clock-frequency = <32768>; + }; }; vemmc_reg: voltage-regulator { @@ -537,6 +544,12 @@ status = "okay"; }; +&rtc { + status = "okay"; + clocks = <&clock CLK_RTC>, <&pmic_ap_clk>; + clock-names = "rtc", "rtc_src"; +}; + &sdhci_0 { bus-width = <8>; non-removable;
The S3C RTC requires 32768 Hz clock as input which is provided by PMIC. However there is no clock provided for the PMIC and the driver registers the clock as regulator. This is an old driver which will not be updated so add a workaround - add a fixed-clock to fill missing clock phandle reference in S3C RTC. The "clock" regulator in PMIC is already present and enabled. This allows to enable the S3C RTC and fixes dtbs_check warnings: arch/arm/boot/dts/exynos4210-universal_c210.dt.yaml: rtc@10070000: clocks: [[5, 346]] is too short arch/arm/boot/dts/exynos4210-universal_c210.dt.yaml: rtc@10070000: clock-names: ['rtc'] is too short Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> --- arch/arm/boot/dts/exynos4210-universal_c210.dts | 13 +++++++++++++ 1 file changed, 13 insertions(+)