@@ -794,6 +794,13 @@ ap_spi_fp: &spi10 {
&uart3 {
status = "okay";
+ /delete-property/interrupts;
+ interrupts-extended = <&intc GIC_SPI 604 IRQ_TYPE_LEVEL_HIGH>,
+ <&tlmm 41 IRQ_TYPE_EDGE_FALLING>;
+
+ pinctrl-names = "default", "sleep";
+ pinctrl-1 = <&qup_uart3_sleep>;
+
bluetooth: bluetooth {
compatible = "qcom,wcn3991-bt";
vddio-supply = <&pp1800_l10a>;
@@ -1307,6 +1314,53 @@ ap_spi_fp: &spi10 {
};
};
+ qup_uart3_sleep: qup-uart3-sleep {
+ pinmux {
+ pins = "gpio38", "gpio39",
+ "gpio40", "gpio41";
+ function = "gpio";
+ };
+
+ pinconf-cts {
+ /*
+ * Configure a pull-down on CTS to match the pull of
+ * the Bluetooth module.
+ */
+ pins = "gpio38";
+ bias-pull-down;
+ };
+
+ pinconf-rts {
+ /*
+ * 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).
+ */
+ pins = "gpio39";
+ bias-pull-down;
+ };
+
+ pinconf-tx {
+ /*
+ * Configure pull-up on TX when it isn't actively driven
+ * to prevent BT SoC from receiving garbage during sleep.
+ */
+ pins = "gpio40";
+ bias-pull-up;
+ };
+
+ pinconf-rx {
+ /*
+ * 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.
+ */
+ pins = "gpio41";
+ bias-pull-up;
+ };
+ };
+
trackpad_int_1v8_odl: trackpad-int-1v8-odl {
pinmux {
pins = "gpio58";
Add the necessary pinctrl, interrupt property and a suitable sleep config to support Bluetooth wakeup feature. GPIO mode is configured in sleep state to drive the RTS/RFR line low. If QUP function is selected in sleep state, UART RTS/RFR is pulled high during suspend and BT SoC not able to send wakeup bytes. Signed-off-by: satya priya <skakit@codeaurora.org> --- Changes in V5: - Newly added in V5. This patch adds wakeup support for trogdor board files. Changes in V6: - As per Doug's comment deleted interrupts property and sorted the qup sleep state before trackpad. - As per Bjorn's comment canged the commit text, rationale for RTS, TX, RX. arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi | 54 ++++++++++++++++++++++++++++ 1 file changed, 54 insertions(+)