[PATCH v2 0/2] arm64: dts: qcom: Add Qualcomm RB2 board dts

[PATCH v2 0/2] arm64: dts: qcom: Add Qualcomm RB2 board dts

[Bhupesh Sharma]

Changes since v1:
-----------------
- v1 can be viewed here: https://lore.kernel.org/linux-arm-msm/20230314210828.2049720-1-bhupesh.sharma@linaro.org/
- Addressed review comments from Konrad and fixed the board dts and also
  added a new 'qcom,qrb4210' compatible.
- Although Krzysztof provided an Ack for [PATCH 1/2] from the v1 series,
  since this series introduces the new 'qcom,qrb4210' compatible, so I
  have dropped the same for now.
 
Add an initial device tree for Qualcomm RB2 board (see [1]).
It is based on the Robotics version of the Snapdragon SM4250
Soc, i.e. QRB4210.

Currently it enables:
    - eMMC via SDHC1,
    - uSD card via SDHC2,
    - RPM regulators,
    - Debug UART (via micro USB port).

Subsequent patchset(s) will add more peripherals like USB, etc.

This patchset is dependent on the QRB4210 SocInfo patchset sent out
earlier (see [2]).

To get a successful boot run:
    
   $ cat arch/arm64/boot/Image.gz arch/arm64/boot/dts/qcom/\
    qrb4210-rb2.dtb > ./Image-adp.gz+dtb

   $ mkbootimg --kernel ./Image-adp.gz+dtb \
     --ramdisk ./some-initramfs-image.rootfs.img \
     --output ./rb2-boot.img --pagesize 4096 \
     --base 0x80000000 --cmdline 'SOME_CMDLINE'
    
   $ fastboot boot ./rb2-boot.img

[1]. https://www.qualcomm.com/products/internet-of-things/industrial/industrial-automation/qualcomm-robotics-rb2-platform#Overview
[2]. https://lore.kernel.org/linux-arm-msm/20230315160151.2166861-1-bhupesh.sharma@linaro.org/

Bhupesh Sharma (2):
  dt-bindings: arm: qcom: Document the Qualcomm qrb4210-rb2 board
  arm64: dts: qcom: Add base qrb4210-rb2 board dts

 .../devicetree/bindings/arm/qcom.yaml         |   8 +
 arch/arm64/boot/dts/qcom/Makefile             |   1 +
 arch/arm64/boot/dts/qcom/qrb4210-rb2.dts      | 224 ++++++++++++++++++
 3 files changed, 233 insertions(+)
 create mode 100644 arch/arm64/boot/dts/qcom/qrb4210-rb2.dts

-- 
2.38.1

[PATCH v2 1/2] dt-bindings: arm: qcom: Document the Qualcomm qrb4210-rb2 board

[Bhupesh Sharma]

Document the Qualcomm qrb4210-rb2 board based on Robotics version
of the Snapdragon SM4250 Soc, i.e. QRB4210.

Signed-off-by: Bhupesh Sharma <bhupesh.sharma@linaro.org>
---
 Documentation/devicetree/bindings/arm/qcom.yaml | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Documentation/devicetree/bindings/arm/qcom.yaml b/Documentation/devicetree/bindings/arm/qcom.yaml
index 23c9c9ba5d52..5490593dc8f1 100644
--- a/Documentation/devicetree/bindings/arm/qcom.yaml
+++ b/Documentation/devicetree/bindings/arm/qcom.yaml
@@ -46,6 +46,7 @@ description: |
         msm8998
         qcs404
         qdu1000
+        qrb4210
         qru1000
         sa8155p
         sa8540p
@@ -90,6 +91,7 @@ description: |
         liquid
         mtp
         qrd
+        rb2
         ride
         sbc
         x100
@@ -848,6 +850,12 @@ properties:
               - oneplus,billie2
           - const: qcom,sm4250
 
+      - items:
+          - enum:
+              - qcom,qrb4210-rb2
+          - const: qcom,qrb4210
+          - const: qcom,sm4250
+
       - items:
           - enum:
               - lenovo,j606f
-- 
2.38.1

[PATCH v2 2/2] arm64: dts: qcom: Add base qrb4210-rb2 board dts

[Bhupesh Sharma]

Add DTS for Qualcomm qrb4210-rb2 board which uses SM4250 SoC.

This adds debug uart, emmc, uSD and tlmm support along with
regulators found on this board.

Also defines the 'xo_board' and 'sleep_clk' frequencies for
this board.

Signed-off-by: Bhupesh Sharma <bhupesh.sharma@linaro.org>
---
 arch/arm64/boot/dts/qcom/Makefile        |   1 +
 arch/arm64/boot/dts/qcom/qrb4210-rb2.dts | 224 +++++++++++++++++++++++
 2 files changed, 225 insertions(+)
 create mode 100644 arch/arm64/boot/dts/qcom/qrb4210-rb2.dts

diff --git a/arch/arm64/boot/dts/qcom/Makefile b/arch/arm64/boot/dts/qcom/Makefile
index 89e23a74bc7f..101ac733422c 100644
--- a/arch/arm64/boot/dts/qcom/Makefile
+++ b/arch/arm64/boot/dts/qcom/Makefile
@@ -69,6 +69,7 @@ dtb-$(CONFIG_ARCH_QCOM)	+= msm8998-xiaomi-sagit.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= qcs404-evb-1000.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= qcs404-evb-4000.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= qdu1000-idp.dtb
+dtb-$(CONFIG_ARCH_QCOM)	+= qrb4210-rb2.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= qrb5165-rb5.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= qrb5165-rb5-vision-mezzanine.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= qru1000-idp.dtb
diff --git a/arch/arm64/boot/dts/qcom/qrb4210-rb2.dts b/arch/arm64/boot/dts/qcom/qrb4210-rb2.dts
new file mode 100644
index 000000000000..c70c532ba721
--- /dev/null
+++ b/arch/arm64/boot/dts/qcom/qrb4210-rb2.dts
@@ -0,0 +1,224 @@
+// SPDX-License-Identifier: BSD-3-Clause
+/*
+ * Copyright (c) 2023, Linaro Limited
+ */
+
+/dts-v1/;
+
+#include "sm4250.dtsi"
+
+/ {
+	model = "Qualcomm Technologies, Inc. QRB4210 RB2";
+	compatible = "qcom,qrb4210-rb2", "qcom,qrb4210", "qcom,sm4250";
+
+	aliases {
+		serial0 = &uart4;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
+	vph_pwr: vph-pwr-regulator {
+		compatible = "regulator-fixed";
+		regulator-name = "vph_pwr";
+		regulator-min-microvolt = <3700000>;
+		regulator-max-microvolt = <3700000>;
+
+		regulator-always-on;
+		regulator-boot-on;
+	};
+};
+
+&qupv3_id_0 {
+	status = "okay";
+};
+
+&rpm_requests {
+	regulators {
+		compatible = "qcom,rpm-pm6125-regulators";
+
+		vdd-s1-supply = <&vph_pwr>;
+		vdd-s2-supply = <&vph_pwr>;
+		vdd-s3-supply = <&vph_pwr>;
+		vdd-s4-supply = <&vph_pwr>;
+		vdd-s5-supply = <&vph_pwr>;
+		vdd-s6-supply = <&vph_pwr>;
+		vdd-s7-supply = <&vph_pwr>;
+		vdd-s8-supply = <&vph_pwr>;
+		vdd-s9-supply = <&vph_pwr>;
+		vdd-s10-supply = <&vph_pwr>;
+
+		vdd-l1-l7-l17-l18-supply = <&vreg_s6a_1p352>;
+		vdd-l2-l3-l4-supply = <&vreg_s6a_1p352>;
+		vdd-l5-l15-l19-l20-l21-l22-supply = <&vph_pwr>;
+		vdd-l6-l8-supply = <&vreg_s5a_0p848>;
+		vdd-l9-l11-supply = <&vreg_s7a_2p04>;
+		vdd-l10-l13-l14-supply = <&vreg_s7a_2p04>;
+		vdd-l12-l16-supply = <&vreg_s7a_2p04>;
+		vdd-l23-l24-supply = <&vph_pwr>;
+
+		vreg_s5a_0p848: s5 {
+			regulator-min-microvolt = <920000>;
+			regulator-max-microvolt = <1128000>;
+		};
+
+		vreg_s6a_1p352: s6 {
+			regulator-min-microvolt = <304000>;
+			regulator-max-microvolt = <1456000>;
+		};
+
+		vreg_s7a_2p04: s7 {
+			regulator-min-microvolt = <1280000>;
+			regulator-max-microvolt = <2080000>;
+		};
+
+		vreg_l1a_1p0: l1 {
+			regulator-min-microvolt = <952000>;
+			regulator-max-microvolt = <1152000>;
+		};
+
+		vreg_l4a_0p9: l4 {
+			regulator-min-microvolt = <488000>;
+			regulator-max-microvolt = <1000000>;
+		};
+
+		vreg_l5a_2p96: l5 {
+			regulator-min-microvolt = <1648000>;
+			regulator-max-microvolt = <3056000>;
+		};
+
+		vreg_l6a_0p6: l6 {
+			regulator-min-microvolt = <576000>;
+			regulator-max-microvolt = <656000>;
+		};
+
+		vreg_l7a_1p256: l7 {
+			regulator-min-microvolt = <1200000>;
+			regulator-max-microvolt = <1304000>;
+		};
+
+		vreg_l8a_0p664: l8 {
+			regulator-min-microvolt = <400000>;
+			regulator-max-microvolt = <728000>;
+		};
+
+		vreg_l9a_1p8: l9 {
+			regulator-min-microvolt = <1800000>;
+			regulator-max-microvolt = <2000000>;
+		};
+
+		vreg_l10a_1p8: l10 {
+			regulator-min-microvolt = <1704000>;
+			regulator-max-microvolt = <1904000>;
+		};
+
+		vreg_l11a_1p8: l11 {
+			regulator-min-microvolt = <1704000>;
+			regulator-max-microvolt = <1952000>;
+		};
+
+		vreg_l12a_1p8: l12 {
+			regulator-min-microvolt = <1624000>;
+			regulator-max-microvolt = <1984000>;
+		};
+
+		vreg_l13a_1p8: l13 {
+			regulator-min-microvolt = <1504000>;
+			regulator-max-microvolt = <1952000>;
+		};
+
+		vreg_l14a_1p8: l14 {
+			regulator-min-microvolt = <1704000>;
+			regulator-max-microvolt = <1904000>;
+		};
+
+		vreg_l15a_3p128: l15 {
+			regulator-min-microvolt = <2920000>;
+			regulator-max-microvolt = <3232000>;
+		};
+
+		vreg_l16a_1p3: l16 {
+			regulator-min-microvolt = <1704000>;
+			regulator-max-microvolt = <1904000>;
+		};
+
+		vreg_l17a_1p3: l17 {
+			regulator-min-microvolt = <1152000>;
+			regulator-max-microvolt = <1384000>;
+		};
+
+		vreg_l18a_1p232: l18 {
+			regulator-min-microvolt = <1104000>;
+			regulator-max-microvolt = <1312000>;
+		};
+
+		vreg_l19a_1p8: l19 {
+			regulator-min-microvolt = <1624000>;
+			regulator-max-microvolt = <3304000>;
+		};
+
+		vreg_l20a_1p8: l20 {
+			regulator-min-microvolt = <2504000>;
+			regulator-max-microvolt = <2960000>;
+		};
+
+		vreg_l21a_2p704: l21 {
+			regulator-min-microvolt = <2504000>;
+			regulator-max-microvolt = <2960000>;
+		};
+
+		vreg_l22a_2p96: l22 {
+			regulator-min-microvolt = <2504000>;
+			regulator-max-microvolt = <2960000>;
+		};
+
+		vreg_l23a_3p3: l23 {
+			regulator-min-microvolt = <2504000>;
+			regulator-max-microvolt = <2960000>;
+		};
+
+		vreg_l24a_2p96: l24 {
+			regulator-min-microvolt = <2504000>;
+			regulator-max-microvolt = <2960000>;
+		};
+	};
+};
+
+&sdhc_1 {
+	status = "okay";
+
+	vmmc-supply = <&vreg_l24a_2p96>;
+	vqmmc-supply = <&vreg_l11a_1p8>;
+	no-sdio;
+	non-removable;
+};
+
+&sdhc_2 {
+	status = "okay";
+
+	cd-gpios = <&tlmm 88 GPIO_ACTIVE_HIGH>; /* card detect gpio */
+	vmmc-supply = <&vreg_l22a_2p96>;
+	vqmmc-supply = <&vreg_l5a_2p96>;
+	no-sdio;
+};
+
+&sleep_clk {
+	clock-frequency = <32000>;
+};
+
+&tlmm {
+	gpio-reserved-ranges = <37 5>, <43 2>, <47 1>,
+			       <49 1>, <52 1>, <54 1>,
+			       <56 3>, <61 2>, <64 1>,
+			       <68 1>, <72 8>, <96 1>;
+};
+
+&uart4 {
+	status = "okay";
+};
+
+&xo_board {
+	clock-frequency = <19200000>;
+};
-- 
2.38.1

Re: [PATCH v2 2/2] arm64: dts: qcom: Add base qrb4210-rb2 board dts

[Bjorn Andersson]

On Thu, Mar 16, 2023 at 02:31:45AM +0530, Bhupesh Sharma wrote:
> Add DTS for Qualcomm qrb4210-rb2 board which uses SM4250 SoC.
> 
> This adds debug uart, emmc, uSD and tlmm support along with
> regulators found on this board.
> 
> Also defines the 'xo_board' and 'sleep_clk' frequencies for
> this board.
> 
> Signed-off-by: Bhupesh Sharma <bhupesh.sharma@linaro.org>
> ---
>  arch/arm64/boot/dts/qcom/Makefile        |   1 +
>  arch/arm64/boot/dts/qcom/qrb4210-rb2.dts | 224 +++++++++++++++++++++++
>  2 files changed, 225 insertions(+)
>  create mode 100644 arch/arm64/boot/dts/qcom/qrb4210-rb2.dts
> 
> diff --git a/arch/arm64/boot/dts/qcom/Makefile b/arch/arm64/boot/dts/qcom/Makefile
> index 89e23a74bc7f..101ac733422c 100644
> --- a/arch/arm64/boot/dts/qcom/Makefile
> +++ b/arch/arm64/boot/dts/qcom/Makefile
> @@ -69,6 +69,7 @@ dtb-$(CONFIG_ARCH_QCOM)	+= msm8998-xiaomi-sagit.dtb
>  dtb-$(CONFIG_ARCH_QCOM)	+= qcs404-evb-1000.dtb
>  dtb-$(CONFIG_ARCH_QCOM)	+= qcs404-evb-4000.dtb
>  dtb-$(CONFIG_ARCH_QCOM)	+= qdu1000-idp.dtb
> +dtb-$(CONFIG_ARCH_QCOM)	+= qrb4210-rb2.dtb
>  dtb-$(CONFIG_ARCH_QCOM)	+= qrb5165-rb5.dtb
>  dtb-$(CONFIG_ARCH_QCOM)	+= qrb5165-rb5-vision-mezzanine.dtb
>  dtb-$(CONFIG_ARCH_QCOM)	+= qru1000-idp.dtb
> diff --git a/arch/arm64/boot/dts/qcom/qrb4210-rb2.dts b/arch/arm64/boot/dts/qcom/qrb4210-rb2.dts
> new file mode 100644
> index 000000000000..c70c532ba721
> --- /dev/null
> +++ b/arch/arm64/boot/dts/qcom/qrb4210-rb2.dts
> @@ -0,0 +1,224 @@
> +// SPDX-License-Identifier: BSD-3-Clause
> +/*
> + * Copyright (c) 2023, Linaro Limited
> + */
> +
> +/dts-v1/;
> +
> +#include "sm4250.dtsi"
> +
> +/ {
> +	model = "Qualcomm Technologies, Inc. QRB4210 RB2";
> +	compatible = "qcom,qrb4210-rb2", "qcom,qrb4210", "qcom,sm4250";
> +
> +	aliases {
> +		serial0 = &uart4;
> +	};
> +
> +	chosen {
> +		stdout-path = "serial0:115200n8";
> +	};
> +
> +	vph_pwr: vph-pwr-regulator {
> +		compatible = "regulator-fixed";
> +		regulator-name = "vph_pwr";
> +		regulator-min-microvolt = <3700000>;
> +		regulator-max-microvolt = <3700000>;
> +
> +		regulator-always-on;
> +		regulator-boot-on;
> +	};
> +};
> +
> +&qupv3_id_0 {
> +	status = "okay";
> +};
> +
> +&rpm_requests {
> +	regulators {
> +		compatible = "qcom,rpm-pm6125-regulators";
> +
> +		vdd-s1-supply = <&vph_pwr>;
> +		vdd-s2-supply = <&vph_pwr>;
> +		vdd-s3-supply = <&vph_pwr>;
> +		vdd-s4-supply = <&vph_pwr>;
> +		vdd-s5-supply = <&vph_pwr>;
> +		vdd-s6-supply = <&vph_pwr>;
> +		vdd-s7-supply = <&vph_pwr>;
> +		vdd-s8-supply = <&vph_pwr>;
> +		vdd-s9-supply = <&vph_pwr>;
> +		vdd-s10-supply = <&vph_pwr>;
> +
> +		vdd-l1-l7-l17-l18-supply = <&vreg_s6a_1p352>;
> +		vdd-l2-l3-l4-supply = <&vreg_s6a_1p352>;
> +		vdd-l5-l15-l19-l20-l21-l22-supply = <&vph_pwr>;
> +		vdd-l6-l8-supply = <&vreg_s5a_0p848>;
> +		vdd-l9-l11-supply = <&vreg_s7a_2p04>;
> +		vdd-l10-l13-l14-supply = <&vreg_s7a_2p04>;
> +		vdd-l12-l16-supply = <&vreg_s7a_2p04>;
> +		vdd-l23-l24-supply = <&vph_pwr>;
> +
> +		vreg_s5a_0p848: s5 {
> +			regulator-min-microvolt = <920000>;
> +			regulator-max-microvolt = <1128000>;
> +		};
> +
> +		vreg_s6a_1p352: s6 {
> +			regulator-min-microvolt = <304000>;
> +			regulator-max-microvolt = <1456000>;
> +		};
> +
> +		vreg_s7a_2p04: s7 {
> +			regulator-min-microvolt = <1280000>;
> +			regulator-max-microvolt = <2080000>;
> +		};
> +
> +		vreg_l1a_1p0: l1 {
> +			regulator-min-microvolt = <952000>;
> +			regulator-max-microvolt = <1152000>;
> +		};
> +
> +		vreg_l4a_0p9: l4 {
> +			regulator-min-microvolt = <488000>;
> +			regulator-max-microvolt = <1000000>;
> +		};
> +
> +		vreg_l5a_2p96: l5 {
> +			regulator-min-microvolt = <1648000>;
> +			regulator-max-microvolt = <3056000>;
> +		};
> +
> +		vreg_l6a_0p6: l6 {
> +			regulator-min-microvolt = <576000>;
> +			regulator-max-microvolt = <656000>;
> +		};
> +
> +		vreg_l7a_1p256: l7 {
> +			regulator-min-microvolt = <1200000>;
> +			regulator-max-microvolt = <1304000>;
> +		};
> +
> +		vreg_l8a_0p664: l8 {
> +			regulator-min-microvolt = <400000>;
> +			regulator-max-microvolt = <728000>;
> +		};
> +
> +		vreg_l9a_1p8: l9 {
> +			regulator-min-microvolt = <1800000>;
> +			regulator-max-microvolt = <2000000>;
> +		};
> +
> +		vreg_l10a_1p8: l10 {
> +			regulator-min-microvolt = <1704000>;
> +			regulator-max-microvolt = <1904000>;
> +		};
> +
> +		vreg_l11a_1p8: l11 {
> +			regulator-min-microvolt = <1704000>;
> +			regulator-max-microvolt = <1952000>;
> +		};
> +
> +		vreg_l12a_1p8: l12 {
> +			regulator-min-microvolt = <1624000>;
> +			regulator-max-microvolt = <1984000>;
> +		};
> +
> +		vreg_l13a_1p8: l13 {
> +			regulator-min-microvolt = <1504000>;
> +			regulator-max-microvolt = <1952000>;
> +		};
> +
> +		vreg_l14a_1p8: l14 {
> +			regulator-min-microvolt = <1704000>;
> +			regulator-max-microvolt = <1904000>;
> +		};
> +
> +		vreg_l15a_3p128: l15 {
> +			regulator-min-microvolt = <2920000>;
> +			regulator-max-microvolt = <3232000>;
> +		};
> +
> +		vreg_l16a_1p3: l16 {
> +			regulator-min-microvolt = <1704000>;
> +			regulator-max-microvolt = <1904000>;
> +		};
> +
> +		vreg_l17a_1p3: l17 {
> +			regulator-min-microvolt = <1152000>;
> +			regulator-max-microvolt = <1384000>;
> +		};
> +
> +		vreg_l18a_1p232: l18 {
> +			regulator-min-microvolt = <1104000>;
> +			regulator-max-microvolt = <1312000>;
> +		};
> +
> +		vreg_l19a_1p8: l19 {
> +			regulator-min-microvolt = <1624000>;
> +			regulator-max-microvolt = <3304000>;
> +		};
> +
> +		vreg_l20a_1p8: l20 {
> +			regulator-min-microvolt = <2504000>;
> +			regulator-max-microvolt = <2960000>;
> +		};
> +
> +		vreg_l21a_2p704: l21 {
> +			regulator-min-microvolt = <2504000>;
> +			regulator-max-microvolt = <2960000>;
> +		};
> +
> +		vreg_l22a_2p96: l22 {
> +			regulator-min-microvolt = <2504000>;
> +			regulator-max-microvolt = <2960000>;
> +		};
> +
> +		vreg_l23a_3p3: l23 {
> +			regulator-min-microvolt = <2504000>;
> +			regulator-max-microvolt = <2960000>;
> +		};
> +
> +		vreg_l24a_2p96: l24 {
> +			regulator-min-microvolt = <2504000>;
> +			regulator-max-microvolt = <2960000>;
> +		};
> +	};
> +};
> +
> +&sdhc_1 {
> +	status = "okay";

Please keep status as the last property.

> +
> +	vmmc-supply = <&vreg_l24a_2p96>;

Is there any reason why this platform doesn't require the vmmc supply to
be driven to HPM? This has traditionally been coming back biting us
through some stability issues later.

Regards,
Bjorn

> +	vqmmc-supply = <&vreg_l11a_1p8>;
> +	no-sdio;
> +	non-removable;
> +};
> +
> +&sdhc_2 {
> +	status = "okay";
> +
> +	cd-gpios = <&tlmm 88 GPIO_ACTIVE_HIGH>; /* card detect gpio */
> +	vmmc-supply = <&vreg_l22a_2p96>;
> +	vqmmc-supply = <&vreg_l5a_2p96>;
> +	no-sdio;
> +};
> +
> +&sleep_clk {
> +	clock-frequency = <32000>;
> +};
> +
> +&tlmm {
> +	gpio-reserved-ranges = <37 5>, <43 2>, <47 1>,
> +			       <49 1>, <52 1>, <54 1>,
> +			       <56 3>, <61 2>, <64 1>,
> +			       <68 1>, <72 8>, <96 1>;
> +};
> +
> +&uart4 {
> +	status = "okay";
> +};
> +
> +&xo_board {
> +	clock-frequency = <19200000>;
> +};
> -- 
> 2.38.1
> 

Re: [PATCH v2 2/2] arm64: dts: qcom: Add base qrb4210-rb2 board dts

[Konrad Dybcio]

On 15.03.2023 23:36, Bjorn Andersson wrote:
> On Thu, Mar 16, 2023 at 02:31:45AM +0530, Bhupesh Sharma wrote:
>> Add DTS for Qualcomm qrb4210-rb2 board which uses SM4250 SoC.
>>
>> This adds debug uart, emmc, uSD and tlmm support along with
>> regulators found on this board.
>>
>> Also defines the 'xo_board' and 'sleep_clk' frequencies for
>> this board.
>>
>> Signed-off-by: Bhupesh Sharma <bhupesh.sharma@linaro.org>
>> ---
[...]

>> +	vmmc-supply = <&vreg_l24a_2p96>;
> 
> Is there any reason why this platform doesn't require the vmmc supply to
> be driven to HPM? This has traditionally been coming back biting us
> through some stability issues later.
Do we even support HPM/LPM on SMD RPM?

Konrad
> 
> Regards,
> Bjorn
> 
>> +	vqmmc-supply = <&vreg_l11a_1p8>;
>> +	no-sdio;
>> +	non-removable;
>> +};
>> +
>> +&sdhc_2 {
>> +	status = "okay";
>> +
>> +	cd-gpios = <&tlmm 88 GPIO_ACTIVE_HIGH>; /* card detect gpio */
>> +	vmmc-supply = <&vreg_l22a_2p96>;
>> +	vqmmc-supply = <&vreg_l5a_2p96>;
>> +	no-sdio;
>> +};
>> +
>> +&sleep_clk {
>> +	clock-frequency = <32000>;
>> +};
>> +
>> +&tlmm {
>> +	gpio-reserved-ranges = <37 5>, <43 2>, <47 1>,
>> +			       <49 1>, <52 1>, <54 1>,
>> +			       <56 3>, <61 2>, <64 1>,
>> +			       <68 1>, <72 8>, <96 1>;
>> +};
>> +
>> +&uart4 {
>> +	status = "okay";
>> +};
>> +
>> +&xo_board {
>> +	clock-frequency = <19200000>;
>> +};
>> -- 
>> 2.38.1
>>

Re: [PATCH v2 1/2] dt-bindings: arm: qcom: Document the Qualcomm qrb4210-rb2 board

[Krzysztof Kozlowski]

On 15/03/2023 22:01, Bhupesh Sharma wrote:
> Document the Qualcomm qrb4210-rb2 board based on Robotics version
> of the Snapdragon SM4250 Soc, i.e. QRB4210.
> 
> Signed-off-by: Bhupesh Sharma <bhupesh.sharma@linaro.org>
> ---

Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

Best regards,
Krzysztof

Re: [PATCH v2 2/2] arm64: dts: qcom: Add base qrb4210-rb2 board dts

[Bhupesh Sharma]

On 3/16/23 5:22 AM, Konrad Dybcio wrote:
> 
> 
> On 15.03.2023 23:36, Bjorn Andersson wrote:
>> On Thu, Mar 16, 2023 at 02:31:45AM +0530, Bhupesh Sharma wrote:
>>> Add DTS for Qualcomm qrb4210-rb2 board which uses SM4250 SoC.
>>>
>>> This adds debug uart, emmc, uSD and tlmm support along with
>>> regulators found on this board.
>>>
>>> Also defines the 'xo_board' and 'sleep_clk' frequencies for
>>> this board.
>>>
>>> Signed-off-by: Bhupesh Sharma <bhupesh.sharma@linaro.org>
>>> ---
> [...]
> 
>>> +	vmmc-supply = <&vreg_l24a_2p96>;
>>
>> Is there any reason why this platform doesn't require the vmmc supply to
>> be driven to HPM? This has traditionally been coming back biting us
>> through some stability issues later.
> Do we even support HPM/LPM on SMD RPM?

I couldn't find any relevant documentation to say the same (HPM/LPM 
support on SMD RPM?).
So, I would suggest that we stick to the approach used in this patch for 
now.

@Bjorn, please let me know in case of any concerns.

Thanks,
Bhupesh

Re: [PATCH v2 2/2] arm64: dts: qcom: Add base qrb4210-rb2 board dts

[Bjorn Andersson]

On Thu, Mar 16, 2023 at 12:52:10AM +0100, Konrad Dybcio wrote:
> 
> 
> On 15.03.2023 23:36, Bjorn Andersson wrote:
> > On Thu, Mar 16, 2023 at 02:31:45AM +0530, Bhupesh Sharma wrote:
> >> Add DTS for Qualcomm qrb4210-rb2 board which uses SM4250 SoC.
> >>
> >> This adds debug uart, emmc, uSD and tlmm support along with
> >> regulators found on this board.
> >>
> >> Also defines the 'xo_board' and 'sleep_clk' frequencies for
> >> this board.
> >>
> >> Signed-off-by: Bhupesh Sharma <bhupesh.sharma@linaro.org>
> >> ---
> [...]
> 
> >> +	vmmc-supply = <&vreg_l24a_2p96>;
> > 
> > Is there any reason why this platform doesn't require the vmmc supply to
> > be driven to HPM? This has traditionally been coming back biting us
> > through some stability issues later.
> Do we even support HPM/LPM on SMD RPM?
> 

We support specifying the load, which will trickle down to have the
HPM/LPM effect. You can find an example of this, with motivation in [1].

PS. While looking for an example I found [2]. regulator-system-load
doesn't do anything unless regulator-allow-set-load is defined...

[1] e38161bd325e ("arm64: dts: apq8096-db820c: Increase load on l21 for SDCARD")
[2] 1d99fee382a6 ("arm64: dts: qcom: sdm845-tama: Add regulator-system-load to l14a/l28a")

Regards,
Bjorn