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Message-ID: <885574fe-3afe-8850-4acb-c330e1755a96@codeaurora.org>
Date: Wed, 10 Mar 2021 10:18:12 +0530
From: Veerabhadrarao Badiganti <vbadigan@...eaurora.org>
To: Shaik Sajida Bhanu <sbhanu@...eaurora.org>,
adrian.hunter@...el.com, ulf.hansson@...aro.org,
robh+dt@...nel.org, sartgarg@...eaurora.org
Cc: asutoshd@...eaurora.org, stummala@...eaurora.org,
rampraka@...eaurora.org, sayalil@...eaurora.org,
rnayak@...eaurora.org, saiprakash.ranjan@...eaurora.org,
sibis@...eaurora.org, cang@...eaurora.org, pragalla@...eaurora.org,
nitirawa@...eaurora.org, linux-mmc@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
devicetree@...r.kernel.org, agross@...nel.org,
bjorn.andersson@...aro.org
Subject: Re: [PATCH V1] arm64: dts: qcom: sc7280: Add nodes for eMMC and SD
card
On 3/10/2021 12:48 AM, Shaik Sajida Bhanu wrote:
> Add nodes for eMMC and SD card on sc7280.
>
> Signed-off-by: Shaik Sajida Bhanu <sbhanu@...eaurora.org>
>
> ---
> This change is depends on the below patch series:
> https://lore.kernel.org/lkml/1613114930-1661-1-git-send-email-rnayak@codeaurora.org/
> https://lore.kernel.org/patchwork/project/lkml/list/?series=&submitter=28035&state=&q=&archive=&delegate=
> ---
> arch/arm64/boot/dts/qcom/sc7280-idp.dts | 26 +++++
> arch/arm64/boot/dts/qcom/sc7280.dtsi | 170 ++++++++++++++++++++++++++++++++
> 2 files changed, 196 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/qcom/sc7280-idp.dts b/arch/arm64/boot/dts/qcom/sc7280-idp.dts
> index ac79420..6abb2aa 100644
> --- a/arch/arm64/boot/dts/qcom/sc7280-idp.dts
> +++ b/arch/arm64/boot/dts/qcom/sc7280-idp.dts
> @@ -8,6 +8,7 @@
> /dts-v1/;
>
> #include "sc7280.dtsi"
> +#include <dt-bindings/gpio/gpio.h>
>
> / {
> model = "Qualcomm Technologies, Inc. SC7280 IDP platform";
> @@ -256,3 +257,28 @@
> bias-pull-up;
> };
> };
> +
> +&sdhc_1 {
> + status = "okay";
> +
> + pinctrl-names = "default", "sleep";
> + pinctrl-0 = <&sdc1_on>;
> + pinctrl-1 = <&sdc1_off>;
> +
> + vmmc-supply = <&vreg_l7b_2p9>;
> + vqmmc-supply = <&vreg_l19b_1p8>;
> +
> +};
> +
> +&sdhc_2 {
> + status = "okay";
> +
> + pinctrl-names = "default","sleep";
> + pinctrl-0 = <&sdc2_on>;
> + pinctrl-1 = <&sdc2_off>;
> +
> + vmmc-supply = <&vreg_l9c_2p9>;
> + vqmmc-supply = <&vreg_l6c_2p9>;
> +
> + cd-gpios = <&tlmm 91 GPIO_ACTIVE_LOW>;
> +};
> diff --git a/arch/arm64/boot/dts/qcom/sc7280.dtsi b/arch/arm64/boot/dts/qcom/sc7280.dtsi
> index 3b86052..91fb18a 100644
> --- a/arch/arm64/boot/dts/qcom/sc7280.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sc7280.dtsi
> @@ -18,6 +18,11 @@
>
> chosen { };
>
> + aliases {
> + mmc1 = &sdhc_1;
> + mmc2 = &sdhc_2;
> + };
> +
> clocks {
> xo_board: xo-board {
> compatible = "fixed-clock";
> @@ -315,6 +320,69 @@
> #power-domain-cells = <1>;
> };
>
> + sdhc_1: sdhci@...000 {
> + compatible = "qcom,sdhci-msm-v5";
> + reg = <0 0x7c4000 0 0x1000>,
> + <0 0x7c5000 0 0x1000>;
> + reg-names = "hc", "cqhci";
> +
> + iommus = <&apps_smmu 0xC0 0x0>;
> + interrupts = <GIC_SPI 652 IRQ_TYPE_LEVEL_HIGH>,
> + <GIC_SPI 656 IRQ_TYPE_LEVEL_HIGH>;
> + interrupt-names = "hc_irq", "pwr_irq";
> +
> + clocks = <&gcc GCC_SDCC1_APPS_CLK>,
> + <&gcc GCC_SDCC1_AHB_CLK>,
> + <&rpmhcc RPMH_CXO_CLK>;
> + clock-names = "core", "iface", "xo";
> +
> + bus-width = <8>;
> + non-removable;
> + supports-cqe;
> + no-sd;
> + no-sdio;
> +
> + max-frequency = <192000000>;
> +
> + qcom,dll-config = <0x0007642c>;
> + qcom,ddr-config = <0x80040868>;
> +
> + mmc-ddr-1_8v;
> + mmc-hs200-1_8v;
> + mmc-hs400-1_8v;
> + mmc-hs400-enhanced-strobe;
> +
> + status = "disabled";
> +
> + };
> +
> + sdhc_2: sdhci@...4000 {
> + compatible = "qcom,sdhci-msm-v5";
> + reg = <0 0x08804000 0 0x1000>;
> +
> + iommus = <&apps_smmu 0x100 0x0>;
> + interrupts = <GIC_SPI 207 IRQ_TYPE_LEVEL_HIGH>,
> + <GIC_SPI 223 IRQ_TYPE_LEVEL_HIGH>;
> + interrupt-names = "hc_irq", "pwr_irq";
> +
> + clocks = <&gcc GCC_SDCC2_APPS_CLK>,
> + <&gcc GCC_SDCC2_AHB_CLK>,
> + <&rpmhcc RPMH_CXO_CLK>;
> + clock-names = "core", "iface", "xo";
> +
> + bus-width = <4>;
> +
> + no-mmc;
> + no-sdio;
> +
> + max-frequency = <202000000>;
> +
> + qcom,dll-config = <0x0007642c>;
> +
> + status = "disabled";
> +
> + };
> +
> qupv3_id_0: geniqup@...000 {
> compatible = "qcom,geni-se-qup";
> reg = <0 0x009c0000 0 0x2000>;
> @@ -385,6 +453,108 @@
> pins = "gpio46", "gpio47";
> function = "qup13";
> };
> +
> + sdc1_on: sdc1-on {
> + pinconf-clk {
> + pins = "sdc1_clk";
> + bias-disable;
> + drive-strength = <16>;
> + };
> +
> + pinconf-cmd {
> + pins = "sdc1_cmd";
> + bias-pull-up;
> + drive-strength = <10>;
> + };
> +
> + pinconf-data {
> + pins = "sdc1_data";
> + bias-pull-up;
> + drive-strength = <10>;
> + };
> +
> + pinconf-rclk {
> + pins = "sdc1_rclk";
> + bias-pull-down;
> + };
> + };
> +
> + sdc1_off: sdc1-off {
> + pinconf-clk {
> + pins = "sdc1_clk";
> + bias-disable;
> + drive-strength = <2>;
> + };
> +
> + pinconf-cmd {
> + pins = "sdc1_cmd";
> + bias-pull-up;
> + drive-strength = <2>;
> + };
> +
> + pinconf-data {
> + pins = "sdc1_data";
> + bias-pull-up;
> + drive-strength = <2>;
> + };
> +
> + pinconf-rclk {
> + pins = "sdc1_rclk";
> + bias-pull-down;
> + };
> + };
> +
> + sdc2_on: sdc2-on {
> + pinconf-clk {
> + pins = "sdc2_clk";
> + bias-disable;
> + drive-strength = <16>;
> + };
> +
> + pinconf-cmd {
> + pins = "sdc2_cmd";
> + bias-pull-up;
> + drive-strength = <10>;
> + };
> +
> + pinconf-data {
> + pins = "sdc2_data";
> + bias-pull-up;
> + drive-strength = <10>;
> + };
> +
> + pinconf-sd-cd {
> + pins = "gpio91";
> + bias-pull-up;
> + drive-strength = <2>;
> + };
> + };
> +
> + sdc2_off: sdc2-off {
> + pinconf-clk {
> + pins = "sdc2_clk";
> + bias-disable;
> + drive-strength = <2>;
> + };
> +
> + pinconf-cmd {
> + pins = "sdc2_cmd";
> + bias-pull-up;
> + drive-strength = <2>;
> + };
> +
> + pinconf-data {
> + pins = "sdc2_data";
> + bias-pull-up;
> + drive-strength = <2>;
> + };
> +
> + pinconf-sd-cd {
> + pins = "gpio91";
> + bias-disable;
On few sc7180 based boards where external pull up is missing on cd-gpio,
we had seen issues like un-intended interrupt on cd-gpio pin (since its
getting toggled) during runtime PM cycle and resulting in unnecessary
scheduling of SDcard scan (mmc_rescan). This issue is seen only when SDcard
is not present.
By enabling internal pull all the time (bais-pull-up), we can avoid such
issue.
> + drive-strength = <2>;
> + };
> + };
> };
>
> apps_smmu: iommu@...00000 {
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