From: Rajesh Patil <rajpat@codeaurora.org>
To: Andy Gross <agross@kernel.org>,
Bjorn Andersson <bjorn.andersson@linaro.org>,
Rob Herring <robh+dt@kernel.org>
Cc: linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org,
devicetree@vger.kernel.org, rnayak@codeaurora.org,
saiprakash.ranjan@codeaurora.org, msavaliy@qti.qualcomm.com,
skakit@codeaurora.org, sboyd@kernel.org, mka@chromium.org,
dianders@chromium.org, Rajesh Patil <rajpat@codeaurora.org>
Subject: [PATCH V7 5/7] arm64: dts: sc7280: Configure uart7 to support bluetooth on sc7280-idp
Date: Fri, 3 Sep 2021 09:58:58 +0530 [thread overview]
Message-ID: <1630643340-10373-6-git-send-email-rajpat@codeaurora.org> (raw)
In-Reply-To: <1630643340-10373-1-git-send-email-rajpat@codeaurora.org>
Add bluetooth uart pin configuration for sc7280-idp.
Signed-off-by: Rajesh Patil <rajpat@codeaurora.org>
Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
---
arch/arm64/boot/dts/qcom/sc7280-idp.dtsi | 85 ++++++++++++++++++++++++++++++++
1 file changed, 85 insertions(+)
diff --git a/arch/arm64/boot/dts/qcom/sc7280-idp.dtsi b/arch/arm64/boot/dts/qcom/sc7280-idp.dtsi
index 53993b3..7c106c0 100644
--- a/arch/arm64/boot/dts/qcom/sc7280-idp.dtsi
+++ b/arch/arm64/boot/dts/qcom/sc7280-idp.dtsi
@@ -297,6 +297,16 @@
vdda18-supply = <&vreg_l1c_1p8>;
};
+&uart7 {
+ status = "okay";
+
+ /delete-property/interrupts;
+ interrupts-extended = <&intc GIC_SPI 608 IRQ_TYPE_LEVEL_HIGH>,
+ <&tlmm 31 IRQ_TYPE_EDGE_FALLING>;
+ pinctrl-names = "default", "sleep";
+ pinctrl-1 = <&qup_uart7_sleep_cts>, <&qup_uart7_sleep_rts>, <&qup_uart7_sleep_tx>, <&qup_uart7_sleep_rx>;
+};
+
/* PINCTRL - additions to nodes defined in sc7280.dtsi */
&qspi_cs0 {
@@ -322,6 +332,81 @@
bias-pull-up;
};
+&qup_uart7_cts {
+ /*
+ * Configure a pull-down on CTS to match the pull of
+ * the Bluetooth module.
+ */
+ bias-pull-down;
+};
+
+&qup_uart7_rts {
+ /* We'll drive RTS, so no pull */
+ drive-strength = <2>;
+ bias-disable;
+};
+
+&qup_uart7_tx {
+ /* We'll drive TX, 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;
+};
+
+&tlmm {
+ qup_uart7_sleep_cts: qup-uart7-sleep-cts {
+ pins = "gpio28";
+ function = "gpio";
+ /*
+ * Configure a pull-down on CTS to match the pull of
+ * the Bluetooth module.
+ */
+ bias-pull-down;
+ };
+
+ qup_uart7_sleep_rts: qup-uart7-sleep-rts {
+ 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_tx: qup-uart7-sleep-tx {
+ 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;
+ };
+
+ qup_uart7_sleep_rx: qup-uart7-sleep-rx {
+ 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;
+ };
+};
+
&sdc1_on {
clk {
bias-disable;
--
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member
of Code Aurora Forum, hosted by The Linux Foundation
next prev parent reply other threads:[~2021-09-03 4:29 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-03 4:28 [PATCH V7 0/7] Add QSPI and QUPv3 DT nodes for SC7280 SoC Rajesh Patil
2021-09-03 4:28 ` [PATCH V7 1/7] arm64: dts: sc7280: Add QSPI node Rajesh Patil
2021-09-03 15:54 ` Matthias Kaehlcke
2021-09-03 16:28 ` Doug Anderson
2021-09-16 4:31 ` rajpat
2021-09-03 4:28 ` [PATCH V7 2/7] arm64: dts: sc7280: Configure SPI-NOR FLASH for sc7280-idp Rajesh Patil
2021-09-03 4:28 ` [PATCH V7 3/7] arm64: dts: sc7280: Add QUPv3 wrapper_0 nodes Rajesh Patil
2021-09-03 16:33 ` Matthias Kaehlcke
2021-09-09 4:46 ` rajpat
2021-09-09 14:06 ` Matthias Kaehlcke
2021-09-03 4:28 ` [PATCH V7 4/7] arm64: dts: sc7280: Update QUPv3 UART5 DT node Rajesh Patil
2021-09-03 4:28 ` Rajesh Patil [this message]
2021-09-03 4:28 ` [PATCH V7 6/7] arm64: dts: sc7280: Add QUPv3 wrapper_1 nodes Rajesh Patil
2021-09-03 17:22 ` Matthias Kaehlcke
2021-09-09 4:44 ` rajpat
2021-09-09 14:07 ` Matthias Kaehlcke
2021-09-03 4:29 ` [PATCH V7 7/7] arm64: dts: sc7280: Add aliases for I2C and SPI Rajesh Patil
2021-09-03 19:01 ` Stephen Boyd
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