On Tue, Jan 09, 2018 at 05:20:51PM +0800, Anson Huang wrote:
> Add i.MX7 SNVS RTC clock.
>
> Signed-off-by: Anson Huang <anson.hu...@nxp.com>
> ---
> changes since v2:
> improve the binding doc statement about clocks.
> Documentation/devicetree/bindings/crypto/fsl-sec4.txt | 15 +++++++++++++++
> arch/arm/boot/dts/imx7s.dtsi | 2 ++
> 2 files changed, 17 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/crypto/fsl-sec4.txt
> b/Documentation/devicetree/bindings/crypto/fsl-sec4.txt
> index 76aec8a..7329f29 100644
> --- a/Documentation/devicetree/bindings/crypto/fsl-sec4.txt
> +++ b/Documentation/devicetree/bindings/crypto/fsl-sec4.txt
> @@ -415,12 +415,25 @@ Secure Non-Volatile Storage (SNVS) Low Power (LP) RTC
> Node
> value type: <u32>
> Definition: LP register offset. default it is 0x34.
>
> + - clocks
> + Usage: required if SNVS LP RTC requires explicit enablement of clocks
> + Value type: <prop_encoded-array>
> + Definition: a clock specifier describing the clock required for
> + enabling and disabling SNVS LP RTC.
> +
This clock seem optional.
Should we indicate it here explicitly?
BTW, i thought we probably could update poweroff and key as well at
the same time since device tree changes can go separately.
Does it make sense?
Regards
Dong Aisheng
> + - clock-names
> + Usage: required if SNVS LP RTC requires explicit enablement of clocks
> + Value type: <string>
> + Definition: clock name string should be "snvs-rtc".
> +
> EXAMPLE
> sec_mon_rtc_lp@1 {
> compatible = "fsl,sec-v4.0-mon-rtc-lp";
> interrupts = <93 2>;
> regmap = <&snvs>;
> offset = <0x34>;
> + clocks = <&clks IMX7D_SNVS_CLK>;
> + clock-names = "snvs-rtc";
> };
>
> =====================================================================
> @@ -543,6 +556,8 @@ FULL EXAMPLE
> regmap = <&sec_mon>;
> offset = <0x34>;
> interrupts = <93 2>;
> + clocks = <&clks IMX7D_SNVS_CLK>;
> + clock-names = "snvs-rtc";
> };
>
> snvs-pwrkey@020cc000 {
> diff --git a/arch/arm/boot/dts/imx7s.dtsi b/arch/arm/boot/dts/imx7s.dtsi
> index 9aa2bb9..02baf42 100644
> --- a/arch/arm/boot/dts/imx7s.dtsi
> +++ b/arch/arm/boot/dts/imx7s.dtsi
> @@ -551,6 +551,8 @@
> offset = <0x34>;
> interrupts = <GIC_SPI 19
> IRQ_TYPE_LEVEL_HIGH>,
> <GIC_SPI 20
> IRQ_TYPE_LEVEL_HIGH>;
> + clocks = <&clks IMX7D_SNVS_CLK>;
> + clock-names = "snvs-rtc";
> };
>
> snvs_poweroff: snvs-poweroff {
> --
> 1.9.1
>
