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Message-Id: <20230421-fp4-bluetooth-v2-4-3de840d5483e@fairphone.com>
Date: Fri, 12 May 2023 15:58:26 +0200
From: Luca Weiss <luca.weiss@...rphone.com>
To: "David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>, Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Marcel Holtmann <marcel@...tmann.org>,
Johan Hedberg <johan.hedberg@...il.com>,
Luiz Augusto von Dentz <luiz.dentz@...il.com>,
Andy Gross <agross@...nel.org>, Bjorn Andersson <andersson@...nel.org>,
Konrad Dybcio <konrad.dybcio@...aro.org>,
Conor Dooley <conor+dt@...nel.org>
Cc: ~postmarketos/upstreaming@...ts.sr.ht, phone-devel@...r.kernel.org,
netdev@...r.kernel.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-bluetooth@...r.kernel.org,
linux-arm-msm@...r.kernel.org, Luca Weiss <luca.weiss@...rphone.com>
Subject: [PATCH v2 4/4] 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 <luca.weiss@...rphone.com>
---
arch/arm64/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 @@ adc-chan@644 {
};
};
+&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 @@ &sdhc_2 {
&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 {
--
2.40.1
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