linux-kernel - Re: [PATCH v3] arm64: dts: rockchip: add "rockchip, grf" property for RK3399 PMUCRU/CRU

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Date:   Tue, 10 Jan 2017 10:37:25 +0800
From:   Shawn Lin <shawn.lin@...k-chips.com>
To:     Xing Zheng <zhengxing@...k-chips.com>, heiko@...ech.de
Cc:     shawn.lin@...k-chips.com, Mark Rutland <mark.rutland@....com>,
        devicetree@...r.kernel.org,
        Elaine Zhang <zhangqing@...k-chips.com>,
        linux-kernel@...r.kernel.org,
        Catalin Marinas <catalin.marinas@....com>,
        Michael Turquette <mturquette@...libre.com>,
        Brian Norris <briannorris@...omium.org>,
        Stephen Boyd <sboyd@...eaurora.org>,
        Douglas Anderson <dianders@...omium.org>,
        Will Deacon <will.deacon@....com>, dianders@...gle.com,
        linux-clk@...r.kernel.org, linux-rockchip@...ts.infradead.org,
        Rob Herring <robh+dt@...nel.org>,
        David Wu <david.wu@...k-chips.com>,
        Jianqun Xu <jay.xu@...k-chips.com>,
        linux-arm-kernel@...ts.infradead.org,
        Caesar Wang <wxt@...k-chips.com>
Subject: Re: [PATCH v3] arm64: dts: rockchip: add "rockchip, grf" property for
 RK3399 PMUCRU/CRU

On 2017/1/10 9:27, Xing Zheng wrote:
> The structure rockchip_clk_provider needs to refer the GRF regmap
> in somewhere, if the CRU node has not "rockchip,grf" property,
> calling syscon_regmap_lookup_by_phandle will return an invalid GRF
> regmap, and the MUXGRF type clock will be not supported.
>
> Therefore, we need to add them.
>
> Signed-off-by: Xing Zheng <zhengxing@...k-chips.com>
> ---
>
> Changes in v3:
> - add optional roperty rockchip,grf in rockchip,rk3399-cru.txt
>
> Changes in v2:
> - referring pmugrf for PMUGRU
> - fix the typo "invaild" in COMMIT message
>
>  Documentation/devicetree/bindings/clock/rockchip,rk3399-cru.txt | 5 +++++
>  arch/arm64/boot/dts/rockchip/rk3399.dtsi                        | 2 ++
>  2 files changed, 7 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/clock/rockchip,rk3399-cru.txt b/Documentation/devicetree/bindings/clock/rockchip,rk3399-cru.txt
> index 3888dd3..f476b3d 100644
> --- a/Documentation/devicetree/bindings/clock/rockchip,rk3399-cru.txt
> +++ b/Documentation/devicetree/bindings/clock/rockchip,rk3399-cru.txt
> @@ -13,6 +13,11 @@ Required Properties:
>  - #clock-cells: should be 1.
>  - #reset-cells: should be 1.
>
> +Optional Properties:
> +
> +- rockchip,grf: phandle to the syscon managing the "general register files"
> +  If missing pll rates are not changable, due to the missing pll lock status.
> +

It twists my tongue w/o proper punctuation:)

- rockchip,grf: phandle to the syscon managing the "general register 
files". If missing, pll rates are not changable due to the missing pll
lock status.


>  Each clock is assigned an identifier and client nodes can use this identifier
>  to specify the clock which they consume. All available clocks are defined as
>  preprocessor macros in the dt-bindings/clock/rk3399-cru.h headers and can be
> diff --git a/arch/arm64/boot/dts/rockchip/rk3399.dtsi b/arch/arm64/boot/dts/rockchip/rk3399.dtsi
> index c928015..081621b 100644
> --- a/arch/arm64/boot/dts/rockchip/rk3399.dtsi
> +++ b/arch/arm64/boot/dts/rockchip/rk3399.dtsi
> @@ -1077,6 +1077,7 @@
>  	pmucru: pmu-clock-controller@...50000 {
>  		compatible = "rockchip,rk3399-pmucru";
>  		reg = <0x0 0xff750000 0x0 0x1000>;
> +		rockchip,grf = <&pmugrf>;
>  		#clock-cells = <1>;
>  		#reset-cells = <1>;
>  		assigned-clocks = <&pmucru PLL_PPLL>;
> @@ -1086,6 +1087,7 @@
>  	cru: clock-controller@...60000 {
>  		compatible = "rockchip,rk3399-cru";
>  		reg = <0x0 0xff760000 0x0 0x1000>;
> +		rockchip,grf = <&grf>;
>  		#clock-cells = <1>;
>  		#reset-cells = <1>;
>  		assigned-clocks =
>


-- 
Best Regards
Shawn Lin