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Message-ID: <14305d3c-f6c0-406e-a15b-c8031d20f96e@quicinc.com>
Date: Tue, 25 Feb 2025 10:44:56 +0530
From: Janaki Ramaiah Thota <quic_janathot@...cinc.com>
To: Bjorn Andersson <andersson@...nel.org>,
Konrad Dybcio
<konradybcio@...nel.org>, Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski
<krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>
CC: <quic_mohamull@...cinc.com>, <quic_hbandi@...cinc.com>,
<linux-arm-msm@...r.kernel.org>, <devicetree@...r.kernel.org>,
<linux-kernel@...r.kernel.org>,
Konrad Dybcio
<konrad.dybcio@....qualcomm.com>
Subject: Re: [PATCH v11 1/1] arm64: dts: qcom: qcs6490-rb3gen2: add and enable
BT node
On 2/24/2025 10:47 PM, Janaki Ramaiah Thota wrote:
> Add the PMU node for WCN6750 present on the qcs6490-rb3gen
> board and assign its power outputs to the Bluetooth module.
>
> In WCN6750 module sw_ctrl and wifi-enable pins are handled
> in the wifi controller firmware. Therefore, it is not required
> to have those pins' entries in the PMU node.
>
> Reviewed-by: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
> Signed-off-by: Janaki Ramaiah Thota <quic_janathot@...cinc.com>
> ---
> arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts | 171 ++++++++++++++++++-
> 1 file changed, 170 insertions(+), 1 deletion(-)
>
> diff --git a/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts b/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts
> index 7a36c90ad4ec..de03770e0b90 100644
> --- a/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts
> +++ b/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts
> @@ -1,6 +1,6 @@
> // SPDX-License-Identifier: BSD-3-Clause
> /*
> - * Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved.
> + * Copyright (c) 2023-2024 Qualcomm Innovation Center, Inc. All rights reserved.
> */
>
> /dts-v1/;
> @@ -34,6 +34,7 @@ / {
>
> aliases {
> serial0 = &uart5;
> + serial1 = &uart7;
> };
>
> chosen {
> @@ -218,6 +219,63 @@ vph_pwr: vph-pwr-regulator {
> regulator-min-microvolt = <3700000>;
> regulator-max-microvolt = <3700000>;
> };
> +
> + wcn6750-pmu {
> + compatible = "qcom,wcn6750-pmu";
> + pinctrl-0 = <&bt_en>;
> + pinctrl-names = "default";
> + vddaon-supply = <&vreg_s7b_0p972>;
> + vddasd-supply = <&vreg_l11c_2p8>;
> + vddpmu-supply = <&vreg_s7b_0p972>;
> + vddrfa0p8-supply = <&vreg_s7b_0p972>;
> + vddrfa1p2-supply = <&vreg_s8b_1p272>;
> + vddrfa1p7-supply = <&vreg_s1b_1p872>;
> + vddrfa2p2-supply = <&vreg_s1c_2p19>;
> +
> + bt-enable-gpios = <&tlmm 85 GPIO_ACTIVE_HIGH>;
> +
> + regulators {
> + vreg_pmu_rfa_cmn: ldo0 {
> + regulator-name = "vreg_pmu_rfa_cmn";
> + };
> +
> + vreg_pmu_aon_0p59: ldo1 {
> + regulator-name = "vreg_pmu_aon_0p59";
> + };
> +
> + vreg_pmu_wlcx_0p8: ldo2 {
> + regulator-name = "vreg_pmu_wlcx_0p8";
> + };
> +
> + vreg_pmu_wlmx_0p85: ldo3 {
> + regulator-name = "vreg_pmu_wlmx_0p85";
> + };
> +
> + vreg_pmu_btcmx_0p85: ldo4 {
> + regulator-name = "vreg_pmu_btcmx_0p85";
> + };
> +
> + vreg_pmu_rfa_0p8: ldo5 {
> + regulator-name = "vreg_pmu_rfa_0p8";
> + };
> +
> + vreg_pmu_rfa_1p2: ldo6 {
> + regulator-name = "vreg_pmu_rfa_1p2";
> + };
> +
> + vreg_pmu_rfa_1p7: ldo7 {
> + regulator-name = "vreg_pmu_rfa_1p7";
> + };
> +
> + vreg_pmu_pcie_0p9: ldo8 {
> + regulator-name = "vreg_pmu_pcie_0p9";
> + };
> +
> + vreg_pmu_pcie_1p8: ldo9 {
> + regulator-name = "vreg_pmu_pcie_1p8";
> + };
> + };
> + };
> };
>
> &apps_rsc {
> @@ -799,6 +857,39 @@ &pon_resin {
> status = "okay";
> };
>
> +&qup_uart7_cts {
> + /*
> + * Configure a bias-bus-hold on CTS to lower power
> + * usage when Bluetooth is turned off. Bus hold will
> + * maintain a low power state regardless of whether
> + * the Bluetooth module drives the pin in either
> + * direction or leaves the pin fully unpowered.
> + */
> + bias-bus-hold;
> +};
> +
> +&qup_uart7_rts {
> + /* We'll drive RTS, so no pull */
> + drive-strength = <2>;
> + bias-disable;
> +};
> +
> +&qup_uart7_rx {
> + /*
> + * Configure a pull-up on RX. This is needed to avoid
> + * garbage data when the TX pin of the Bluetooth module is
> + * in tri-state (module powered off or not driving the
> + * signal yet).
> + */
> + bias-pull-up;
> +};
> +
> +&qup_uart7_tx {
> + /* We'll drive TX, so no pull */
> + drive-strength = <2>;
> + bias-disable;
> +};
> +
> &qupv3_id_0 {
> status = "okay";
> };
> @@ -842,12 +933,90 @@ &sdhc_2 {
> &tlmm {
> gpio-reserved-ranges = <32 2>, /* ADSP */
> <48 4>; /* NFC */
> +
> + bt_en: bt-en-state {
> + pins = "gpio85";
> + function = "gpio";
> + output-low;
> + bias-disable;
> + };
> +
> + qup_uart7_sleep_cts: qup-uart7-sleep-cts-state {
> + pins = "gpio28";
> + function = "gpio";
> + /*
> + * Configure a bias-bus-hold on CTS to lower power
> + * usage when Bluetooth is turned off. Bus hold will
> + * maintain a low power state regardless of whether
> + * the Bluetooth module drives the pin in either
> + * direction or leaves the pin fully unpowered.
> + */
> + bias-bus-hold;
> + };
> +
> + qup_uart7_sleep_rts: qup-uart7-sleep-rts-state {
> + pins = "gpio29";
> + function = "gpio";
> + /*
> + * Configure pull-down on RTS. As RTS is active low
> + * signal, pull it low to indicate the BT SoC that it
> + * can wakeup the system anytime from suspend state by
> + * pulling RX low (by sending wakeup bytes).
> + */
> + bias-pull-down;
> + };
> +
> + qup_uart7_sleep_rx: qup-uart7-sleep-rx-state {
> + pins = "gpio31";
> + function = "gpio";
> + /*
> + * Configure a pull-up on RX. This is needed to avoid
> + * garbage data when the TX pin of the Bluetooth module
> + * is floating which may cause spurious wakeups.
> + */
> + bias-pull-up;
> + };
> +
> + qup_uart7_sleep_tx: qup-uart7-sleep-tx-state {
> + pins = "gpio30";
> + function = "gpio";
> + /*
> + * Configure pull-up on TX when it isn't actively driven
> + * to prevent BT SoC from receiving garbage during sleep.
> + */
> + bias-pull-up;
> + };
> };
>
> &uart5 {
> status = "okay";
> };
>
> +&uart7 {
> + /delete-property/ interrupts;
> + interrupts-extended = <&intc GIC_SPI 608 IRQ_TYPE_LEVEL_HIGH>,
> + <&tlmm 31 IRQ_TYPE_EDGE_FALLING>;
> + pinctrl-1 = <&qup_uart7_sleep_cts>,
> + <&qup_uart7_sleep_rts>,
> + <&qup_uart7_sleep_tx>,
> + <&qup_uart7_sleep_rx>;
> + pinctrl-names = "default",
> + "sleep";
> +
> + status = "okay";
> +
> + bluetooth: bluetooth {
> + compatible = "qcom,wcn6750-bt";
> + vddrfacmn-supply = <&vreg_pmu_rfa_cmn>;
> + vddaon-supply = <&vreg_pmu_aon_0p59>;
> + vddbtcmx-supply = <&vreg_pmu_btcmx_0p85>;
> + vddrfa0p8-supply = <&vreg_pmu_rfa_0p8>;
> + vddrfa1p7-supply = <&vreg_pmu_rfa_1p7>;
> + vddrfa1p2-supply = <&vreg_pmu_rfa_1p2>;
> + max-speed = <3200000>;
> + };
> +};
> +
> &usb_1 {
> status = "okay";
> };
Please ignore this patch, will resend corrected patch.
Thanks,
Janakiram
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