linux-kernel - Re: [RFC 2/9] arm64: dts: qcom: qrb5165-rb5: model the PMU of the QCA6391

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Date: Thu, 1 Feb 2024 22:34:30 -0600
From: Bjorn Andersson <andersson@...nel.org>
To: Bartosz Golaszewski <brgl@...ev.pl>
Cc: Konrad Dybcio <konrad.dybcio@...aro.org>, 
	Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, 
	Conor Dooley <conor+dt@...nel.org>, Marcel Holtmann <marcel@...tmann.org>, 
	Luiz Augusto von Dentz <luiz.dentz@...il.com>, Bjorn Helgaas <bhelgaas@...gle.com>, 
	Neil Armstrong <neil.armstrong@...aro.org>, Alex Elder <elder@...aro.org>, 
	Srini Kandagatla <srinivas.kandagatla@...aro.org>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
	Arnd Bergmann <arnd@...db.de>, Abel Vesa <abel.vesa@...aro.org>, 
	Manivannan Sadhasivam <mani@...nel.org>, Lukas Wunner <lukas@...ner.de>, linux-arm-msm@...r.kernel.org, 
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, linux-bluetooth@...r.kernel.org, 
	linux-pci@...r.kernel.org, Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: Re: [RFC 2/9] arm64: dts: qcom: qrb5165-rb5: model the PMU of the
 QCA6391

On Thu, Feb 01, 2024 at 04:55:25PM +0100, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
> 
> Add a node for the PMU module of the QCA6391 present on the RB5 board.
> Assign its LDO power outputs to the existing Bluetooth module. Add a
> node for the PCIe port to sm8250.dtsi and define the WLAN node on it in
> the board's .dts and also make it consume the power outputs of the PMU.
> 
> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
> ---
>  arch/arm64/boot/dts/qcom/qrb5165-rb5.dts | 128 +++++++++++++++++++++--
>  arch/arm64/boot/dts/qcom/sm8250.dtsi     |  10 ++
>  2 files changed, 127 insertions(+), 11 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/qcom/qrb5165-rb5.dts b/arch/arm64/boot/dts/qcom/qrb5165-rb5.dts
> index cd0db4f31d4a..fab5bebafbad 100644
> --- a/arch/arm64/boot/dts/qcom/qrb5165-rb5.dts
> +++ b/arch/arm64/boot/dts/qcom/qrb5165-rb5.dts
> @@ -108,6 +108,87 @@ lt9611_3v3: lt9611-3v3 {
>  		regulator-always-on;
>  	};
>  
> +	qca6390_pmu: pmu@0 {
> +		compatible = "qcom,qca6390-pmu";
> +
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&bt_en_state>, <&wlan_en_state>;
> +
> +		vddaon-supply = <&vreg_s6a_0p95>;
> +		vddpmu-supply = <&vreg_s2f_0p95>;
> +		vddrfa1-supply = <&vreg_s2f_0p95>;
> +		vddrfa2-supply = <&vreg_s8c_1p3>;
> +		vddrfa3-supply = <&vreg_s5a_1p9>;
> +		vddpcie1-supply = <&vreg_s8c_1p3>;
> +		vddpcie2-supply = <&vreg_s5a_1p9>;
> +		vddio-supply = <&vreg_s4a_1p8>;
> +
> +		wlan-enable-gpios = <&tlmm 20 GPIO_ACTIVE_HIGH>;
> +		bt-enable-gpios = <&tlmm 21 GPIO_ACTIVE_HIGH>;
> +
> +		regulators {
> +			vreg_pmu_rfa_cmn: ldo0 {
> +				regulator-name = "vreg_pmu_rfa_cmn";
> +				regulator-min-microvolt = <760000>;
> +				regulator-max-microvolt = <840000>;

I'm still not convinced that the PMU has a set of LDOs, and looking at
your implementation you neither register these with the regulator
framework, nor provide any means of controlling the state or voltage of
these "regulators".

[..]
>  
>  &uart6 {
> @@ -1311,17 +1418,16 @@ &uart6 {
>  	bluetooth {
>  		compatible = "qcom,qca6390-bt";
>  
> -		pinctrl-names = "default";
> -		pinctrl-0 = <&bt_en_state>;
> -
> -		enable-gpios = <&tlmm 21 GPIO_ACTIVE_HIGH>;
> -
> -		vddio-supply = <&vreg_s4a_1p8>;
> -		vddpmu-supply = <&vreg_s2f_0p95>;
> -		vddaon-supply = <&vreg_s6a_0p95>;
> -		vddrfa0p9-supply = <&vreg_s2f_0p95>;
> -		vddrfa1p3-supply = <&vreg_s8c_1p3>;
> -		vddrfa1p9-supply = <&vreg_s5a_1p9>;
> +		vddrfacmn-supply = <&vreg_pmu_rfa_cmn>;
> +		vddaon-supply = <&vreg_pmu_aon_0p59>;
> +		vddwlcx-supply = <&vreg_pmu_wlcx_0p8>;
> +		vddwlmx-supply = <&vreg_pmu_wlmx_0p85>;
> +		vddbtcmx-supply = <&vreg_pmu_btcmx_0p85>;
> +		vddrfa0-supply = <&vreg_pmu_rfa_0p8>;
> +		vddrfa1-supply = <&vreg_pmu_rfa_1p2>;
> +		vddrfa2-supply = <&vreg_pmu_rfa_1p7>;
> +		vddpcie0-supply = <&vreg_pmu_pcie_0p9>;
> +		vddpcie1-supply = <&vreg_pmu_pcie_1p8>;

As I asked before, why does bluetooth suddenly care about PCIe supplies?

Regards,
Bjorn

>  	};
>  };
>  
> diff --git a/arch/arm64/boot/dts/qcom/sm8250.dtsi b/arch/arm64/boot/dts/qcom/sm8250.dtsi
> index 4d849e98bf9b..7cd21d4e7278 100644
> --- a/arch/arm64/boot/dts/qcom/sm8250.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sm8250.dtsi
> @@ -2203,6 +2203,16 @@ pcie0: pcie@...0000 {
>  			dma-coherent;
>  
>  			status = "disabled";
> +
> +			pcieport0: pcie@0 {
> +				device_type = "pci";
> +				reg = <0x0 0x0 0x0 0x0 0x0>;
> +				#address-cells = <3>;
> +				#size-cells = <2>;
> +				ranges;
> +
> +				bus-range = <0x01 0xff>;
> +			};
>  		};
>  
>  		pcie0_phy: phy@...6000 {
> -- 
> 2.40.1
>