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SubjectRe: [PATCH v9 3/4] arm64: dts: qcom: sc7280: Add PCIe nodes for IDP board
On 2021-09-29 02:22, Stephen Boyd wrote:
> Quoting Prasad Malisetty (2021-09-28 06:55:49)
>> Enable PCIe controller and PHY for sc7280 IDP board.
>> Add specific NVMe GPIO entries for SKU1 and SKU2 support.
>>
>> Signed-off-by: Prasad Malisetty <pmaliset@codeaurora.org>
>> ---
>> arch/arm64/boot/dts/qcom/sc7280-idp.dts | 9 ++++++
>> arch/arm64/boot/dts/qcom/sc7280-idp.dtsi | 54
>> ++++++++++++++++++++++++++++++++
>> arch/arm64/boot/dts/qcom/sc7280-idp2.dts | 9 ++++++
>> 3 files changed, 72 insertions(+)
>>
>> diff --git a/arch/arm64/boot/dts/qcom/sc7280-idp.dts
>> b/arch/arm64/boot/dts/qcom/sc7280-idp.dts
>> index 64fc22a..1562386 100644
>> --- a/arch/arm64/boot/dts/qcom/sc7280-idp.dts
>> +++ b/arch/arm64/boot/dts/qcom/sc7280-idp.dts
>> @@ -61,6 +61,15 @@
>> modem-init;
>> };
>>
>> +&nvme_pwren_pin {
>> + pins = "gpio19";
>> +};
>
> This should move to the bottom in the "pinctrl" section.
>
Hi Stephen,

There is no pinctrl section in this file. we defined nvme_pwren_pin in
common IDP file(sc7280-idp.dtsi) and using the nvme_pwren_pin reference
to define SKU specific gpio pin for SKU1 and SKU2 support.

Thanks
-Prasad
>> +
>> +&nvme_3v3_regulators {
>> + gpio = <&tlmm 19 GPIO_ACTIVE_HIGH>;
>> + enable-active-high;
>
> The enable-active-high can be in the idp.dtsi file? That doesn't seem
> to
> change.
>
>> +};
>> +
>> &pmk8350_vadc {
>> pmr735a_die_temp {
>> reg = <PMR735A_ADC7_DIE_TEMP>;
>> diff --git a/arch/arm64/boot/dts/qcom/sc7280-idp.dtsi
>> b/arch/arm64/boot/dts/qcom/sc7280-idp.dtsi
>> index def22ff..5b5505f 100644
>> --- a/arch/arm64/boot/dts/qcom/sc7280-idp.dtsi
>> +++ b/arch/arm64/boot/dts/qcom/sc7280-idp.dtsi
>> @@ -31,6 +31,17 @@
>> linux,can-disable;
>> };
>> };
>> +
>> + nvme_3v3_regulators: nvme-3v3-regulators {
>
> Why plural? Isn't it a single regulator?
>
Sure, I will update in next version

Thanks
-Prasad
>> + compatible = "regulator-fixed";
>> + regulator-name = "VLDO_3V3";
>> +
>> + regulator-min-microvolt = <3300000>;
>> + regulator-max-microvolt = <3300000>;
>> +
>> + pinctrl-names = "default";
>> + pinctrl-0 = <&nvme_pwren_pin>;
>> + };
>> };
>>
>> &apps_rsc {
>> @@ -220,6 +231,42 @@
>> modem-init;
>> };
>>
>> +&pcie1 {
>> + status = "okay";
>> + perst-gpio = <&tlmm 2 GPIO_ACTIVE_LOW>;
>> +
>> + vddpe-3v3-supply = <&nvme_3v3_regulators>;
>> +
>> + pinctrl-names = "default";
>> + pinctrl-0 = <&pcie1_default_state>;
>> +};
>> +
>> +&pcie1_phy {
>> + status = "okay";
>> +
>> + vdda-phy-supply = <&vreg_l10c_0p8>;
>> + vdda-pll-supply = <&vreg_l6b_1p2>;
>> +};
>> +
>> +&pcie1_default_state {
>
> I thought the node would be split into a reset config node and a wake
> config node. Is that not being done for some reason? The pinctrl-0
> would
> look like
>
Agree, I will incorporate the changes in next version.

> pinctrl-0 = <&pcie1_default_state>, <&pcie1_reset_n>, <&pcie1_wake_n>;
>
>> + reset-n {
>> + pins = "gpio2";
>> + function = "gpio";
>> +
>> + drive-strength = <16>;
>> + output-low;
>> + bias-disable;
>> + };
>> +
>> + wake-n {
>> + pins = "gpio3";
>> + function = "gpio";
>> +
>> + drive-strength = <2>;
>> + bias-pull-up;
>> + };
>> +};
>> +
>> &pmk8350_vadc {
>> pmk8350_die_temp {
>> reg = <PMK8350_ADC7_DIE_TEMP>;
>> @@ -489,3 +536,10 @@
>> bias-pull-up;
>> };
>> };
>> +
>> +&tlmm {
>> + nvme_pwren_pin: nvme-pwren-pin {
>> + function = "gpio";
>> + bias-pull-up;
>> + };
>> +};
>> diff --git a/arch/arm64/boot/dts/qcom/sc7280-idp2.dts
>> b/arch/arm64/boot/dts/qcom/sc7280-idp2.dts
>> index 1fc2add..0548cb6 100644
>> --- a/arch/arm64/boot/dts/qcom/sc7280-idp2.dts
>> +++ b/arch/arm64/boot/dts/qcom/sc7280-idp2.dts
>> @@ -21,3 +21,12 @@
>> stdout-path = "serial0:115200n8";
>> };
>> };
>> +
>> +&nvme_pwren_pin {
>> + pins = "gpio51";
>> +};
>
> The pin config can go to a pinctrl section at the bottom of this file?
>
Same as a like SKU1 (sc7280-idp.dts)
>> +
>> +&nvme_3v3_regulators {
>> + gpio = <&tlmm 51 GPIO_ACTIVE_HIGH>;
>> + enable-active-high;
>> +};

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