From c4ef464b24c5aefb7e23eb8fcc08250a783a529b Mon Sep 17 00:00:00 2001 From: Luca Weiss Date: Fri, 12 May 2023 15:58:26 +0200 Subject: [PATCH] arm64: dts: qcom: sm7225-fairphone-fp4: Add Bluetooth The device has a WCN3988 chip for WiFi and Bluetooth. Configure the Bluetooth node and enable the UART it is connected to, plus the necessary pinctrl that has been borrowed with comments from sc7280-idp.dtsi. Signed-off-by: Luca Weiss Signed-off-by: Bjorn Andersson Link: https://lore.kernel.org/r/20230421-fp4-bluetooth-v2-4-3de840d5483e@fairphone.com --- .../boot/dts/qcom/sm7225-fairphone-fp4.dts | 103 ++++++++++++++++++ 1 file changed, 103 insertions(+) diff --git a/arch/arm64/boot/dts/qcom/sm7225-fairphone-fp4.dts b/arch/arm64/boot/dts/qcom/sm7225-fairphone-fp4.dts index 7ae6aba5d2ec..e3dc49951523 100644 --- a/arch/arm64/boot/dts/qcom/sm7225-fairphone-fp4.dts +++ b/arch/arm64/boot/dts/qcom/sm7225-fairphone-fp4.dts @@ -31,6 +31,7 @@ aliases { serial0 = &uart9; + serial1 = &uart1; }; chosen { @@ -524,6 +525,39 @@ }; }; +&qup_uart1_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_uart1_rts { + /* We'll drive RTS, so no pull */ + drive-strength = <2>; + bias-disable; +}; + +&qup_uart1_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_uart1_tx { + /* We'll drive TX, so no pull */ + drive-strength = <2>; + bias-disable; +}; + &qupv3_id_0 { status = "okay"; }; @@ -561,6 +595,75 @@ &tlmm { gpio-reserved-ranges = <13 4>, <56 2>; + + qup_uart1_sleep_cts: qup-uart1-sleep-cts-state { + pins = "gpio61"; + 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_uart1_sleep_rts: qup-uart1-sleep-rts-state { + pins = "gpio62"; + 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_uart1_sleep_rx: qup-uart1-sleep-rx-state { + pins = "gpio64"; + 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_uart1_sleep_tx: qup-uart1-sleep-tx-state { + pins = "gpio63"; + 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; + }; +}; + +&uart1 { + /delete-property/ interrupts; + interrupts-extended = <&intc GIC_SPI 602 IRQ_TYPE_LEVEL_HIGH>, + <&tlmm 64 IRQ_TYPE_EDGE_FALLING>; + + pinctrl-names = "default", "sleep"; + pinctrl-1 = <&qup_uart1_sleep_cts>, <&qup_uart1_sleep_rts>, <&qup_uart1_sleep_tx>, <&qup_uart1_sleep_rx>; + + status = "okay"; + + bluetooth { + compatible = "qcom,wcn3988-bt"; + + vddio-supply = <&vreg_l11a>; + vddxo-supply = <&vreg_l7a>; + vddrf-supply = <&vreg_l2e>; + vddch0-supply = <&vreg_l10e>; + swctrl-gpios = <&tlmm 69 GPIO_ACTIVE_HIGH>; + + max-speed = <3200000>; + }; }; &uart9 { -- 2.20.1