linux-kernel - Re: [PATCH v2 1/2] ARM64: dts: rockchip: add sdhci/emmc for rk3399

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Date:	Fri, 13 May 2016 23:47:57 +0200
From:	Heiko Stuebner <heiko@...ech.de>
To:	Brian Norris <briannorris@...omium.org>
Cc:	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-rockchip@...ts.infradead.org,
	Doug Anderson <dianders@...omium.org>,
	Shawn Lin <shawn.lin@...k-chips.com>,
	Brian Norris <computersforpeace@...il.com>
Subject: Re: [PATCH v2 1/2] ARM64: dts: rockchip: add sdhci/emmc for rk3399

Am Donnerstag, 12. Mai 2016, 15:35:51 schrieb Brian Norris:
> Add description for the SDHCI v5.1 eMMC controller on rk3399. Fix it to
> 200 MHz, to support all supported timing modes.
> 
> Note that 'rockchip,rk3399-sdhci-5.1' is not documented; we presumably
> have a compliant Arasan controller, but let's have a rockchip property
> as the canonical backup/precautionary measure. Per Heiko's previous
> suggestion, let's not clutter the arasan doc with it.
> 
> Signed-off-by: Brian Norris <briannorris@...omium.org>

At least one split is necessary.
So please at least split out the simple-mfd addition into a separate patch
(I should've seen that in v1 already, but sadly didn't)

I'm undecided if the emmc-phy addition also should get its own patch, but I 
guess it can stay together with the emmc controller.

> ---
> v2:
> 
>  * improved commit message
>  * assign eMMC clock to 200 MHz
> 
>  arch/arm64/boot/dts/rockchip/rk3399.dtsi | 25 ++++++++++++++++++++++++-
>  1 file changed, 24 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm64/boot/dts/rockchip/rk3399.dtsi
> b/arch/arm64/boot/dts/rockchip/rk3399.dtsi index
> 46f325a143b0..9980c2eab4e9 100644
> --- a/arch/arm64/boot/dts/rockchip/rk3399.dtsi
> +++ b/arch/arm64/boot/dts/rockchip/rk3399.dtsi
> @@ -215,6 +215,19 @@
>  		status = "disabled";
>  	};
> 
> +	sdhci: sdhci@...30000 {
> +		compatible = "rockchip,rk3399-sdhci-5.1", "arasan,sdhci-5.1";
> +		reg = <0x0 0xfe330000 0x0 0x10000>;
> +		interrupts = <GIC_SPI 11 IRQ_TYPE_LEVEL_HIGH>;
> +		clocks = <&cru SCLK_EMMC>, <&cru ACLK_EMMC>;
> +		clock-names = "clk_xin", "clk_ahb";
> +		assigned-clocks = <&cru SCLK_EMMC>;
> +		assigned-clock-rates = <200000000>;
> +		phys = <&emmc_phy>;
> +		phy-names = "phy_arasan";
> +		status = "disabled";
> +	};
> +
>  	usb_host0_ehci: usb@...80000 {
>  		compatible = "generic-ehci";
>  		reg = <0x0 0xfe380000 0x0 0x20000>;
> @@ -481,8 +494,18 @@
>  	};
> 
>  	grf: syscon@...70000 {
> -		compatible = "rockchip,rk3399-grf", "syscon";
> +		compatible = "rockchip,rk3399-grf", "syscon", "simple-mfd";
>  		reg = <0x0 0xff770000 0x0 0x10000>;
> +
> +		#address-cells = <1>;
> +		#size-cells = <1>;
> +
> +		emmc_phy: phy@...0 {
> +			compatible = "rockchip,rk3399-emmc-phy";
> +			reg = <0xf780 0x20>;
> +			#phy-cells = <0>;
> +			status = "disabled";
> +		};
>  	};
> 
>  	watchdog@...40000 {