linux-kernel - Re: [PATCH V2] arm64: dts: qcom: sc7180: Add nodes for eMMC and SD card

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Date:   Thu, 19 Dec 2019 15:29:08 -0800
From:   Matthias Kaehlcke <mka@...omium.org>
To:     Veerabhadrarao Badiganti <vbadigan@...eaurora.org>
Cc:     adrian.hunter@...el.com, ulf.hansson@...aro.org,
        robh+dt@...nel.org, asutoshd@...eaurora.org,
        stummala@...eaurora.org, sayalil@...eaurora.org,
        cang@...eaurora.org, rampraka@...eaurora.org,
        linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Mark Rutland <mark.rutland@....com>
Subject: Re: [PATCH V2] arm64: dts: qcom: sc7180: Add nodes for eMMC and SD
 card

On Sat, Dec 14, 2019 at 07:24:34AM +0530, Veerabhadrarao Badiganti wrote:
> Add sdhc instances for supporting eMMC and SD-card on sc7180.
> The regulators should be in HPM state for proper functionality of
> eMMC and SD-card. Updating corresponding regulators accordingly.
> 
> Signed-off-by: Veerabhadrarao Badiganti <vbadigan@...eaurora.org>
> ---
> 
> This depends on the patch series (dt support for sc7180):
> https://lkml.org/lkml/2019/11/8/149
> Also depends on documentation commit 2078158 (Present on mmc-next)
> 
> Changes since V1:
> 	- Updated the regulator min, max voltages as per
> 	  eMMC/SD-card voltage requirements
> 	- Enabled IOMMU for eMMC and SD-card.
> 	- Added pull and drive strength to SD-card cd-gpio.
> 	- Incorporated review comments by Matthias Kaehlcke.
> ---
>  arch/arm64/boot/dts/qcom/sc7180-idp.dts |  47 +++++++---
>  arch/arm64/boot/dts/qcom/sc7180.dtsi    | 148 ++++++++++++++++++++++++++++++++
>  2 files changed, 183 insertions(+), 12 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sc7180-idp.dts b/arch/arm64/boot/dts/qcom/sc7180-idp.dts
> index 189254f..b6d4dc1 100644
> --- a/arch/arm64/boot/dts/qcom/sc7180-idp.dts
> +++ b/arch/arm64/boot/dts/qcom/sc7180-idp.dts
> @@ -7,6 +7,7 @@
>  
>  /dts-v1/;
>  
> +#include <dt-bindings/gpio/gpio.h>
>  #include <dt-bindings/regulator/qcom,rpmh-regulator.h>
>  #include "sc7180.dtsi"
>  #include "pm6150.dtsi"
> @@ -101,9 +102,9 @@
>  		};
>  
>  		vreg_l12a_1p8: ldo12 {
> -			regulator-min-microvolt = <1696000>;
> -			regulator-max-microvolt = <1952000>;
> -			regulator-initial-mode = <RPMH_REGULATOR_MODE_LPM>;
> +			regulator-min-microvolt = <1800000>;
> +			regulator-max-microvolt = <1800000>;
> +			regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
>  		};
>  
>  		vreg_l13a_1p8: ldo13 {
> @@ -143,9 +144,9 @@
>  		};
>  
>  		vreg_l19a_2p9: ldo19 {
> -			regulator-min-microvolt = <2696000>;
> -			regulator-max-microvolt = <3304000>;
> -			regulator-initial-mode = <RPMH_REGULATOR_MODE_LPM>;
> +			regulator-min-microvolt = <2960000>;
> +			regulator-max-microvolt = <2960000>;
> +			regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
>  		};
>  	};
>  
> @@ -189,9 +190,9 @@
>  		};
>  
>  		vreg_l6c_2p9: ldo6 {
> -			regulator-min-microvolt = <2696000>;
> -			regulator-max-microvolt = <3304000>;
> -			regulator-initial-mode = <RPMH_REGULATOR_MODE_LPM>;
> +			regulator-min-microvolt = <1800000>;
> +			regulator-max-microvolt = <2950000>;
> +			regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
>  		};
>  
>  		vreg_l7c_3p0: ldo7 {
> @@ -207,9 +208,9 @@
>  		};
>  
>  		vreg_l9c_2p9: ldo9 {
> -			regulator-min-microvolt = <2952000>;
> -			regulator-max-microvolt = <3304000>;
> -			regulator-initial-mode = <RPMH_REGULATOR_MODE_LPM>;
> +			regulator-min-microvolt = <2960000>;
> +			regulator-max-microvolt = <2960000>;
> +			regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
>  		};
>  
>  		vreg_l10c_3p3: ldo10 {
> @@ -400,3 +401,25 @@
>  			bias-pull-up;
>  		};
>  };
> +
> +&sdhc_1 {
> +	status = "ok";

another nit: the DT code is fine with both "okay" and "ok", however
the rest of this file uses "okay", so let's be consistent and use the
same string in all nodes.

> +
> +	pinctrl-names = "default", "sleep";
> +	pinctrl-0 = <&sdc1_on>;
> +	pinctrl-1 = <&sdc1_off>;
> +	vmmc-supply = <&vreg_l19a_2p9>;
> +	vqmmc-supply = <&vreg_l12a_1p8>;
> +};
> +
> +&sdhc_2 {
> +	status = "ok";

ditto