arm64: dts: qcom: qcs404: Specify pinctrl state for UART

BLSP1 UART2 is used as debug uart on the EVB development board, define
pinmux state for the UART in the platform dtsi and pinconf state for it
in the board dts.

Reviewed-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>

diff --git a/arch/arm64/boot/dts/qcom/qcs404-evb.dtsi b/arch/arm64/boot/dts/qcom/qcs404-evb.dtsi
index ba41523..50b3589 100644 (file)
--- a/arch/arm64/boot/dts/qcom/qcs404-evb.dtsi
+++ b/arch/arm64/boot/dts/qcom/qcs404-evb.dtsi
@@ -191,3 +191,17 @@
 &wifi {
        status = "okay";
 };
+
+/* PINCTRL - additions to nodes defined in qcs404.dtsi */
+
+&blsp1_uart2_default {
+       rx {
+               drive-strength = <2>;
+               bias-disable;
+       };
+
+       tx {
+               drive-strength = <2>;
+               bias-disable;
+       };
+};

diff --git a/arch/arm64/boot/dts/qcom/qcs404.dtsi b/arch/arm64/boot/dts/qcom/qcs404.dtsi
index f3d77e7..dd918d3 100644 (file)
--- a/arch/arm64/boot/dts/qcom/qcs404.dtsi
+++ b/arch/arm64/boot/dts/qcom/qcs404.dtsi
@@ -272,6 +272,18 @@
                        #gpio-cells = <2>;
                        interrupt-controller;
                        #interrupt-cells = <2>;
+
+                       blsp1_uart2_default: blsp1-uart2-default {
+                               rx {
+                                       pins = "gpio18";
+                                       function = "blsp_uart_rx_a2";
+                               };
+
+                               tx {
+                                       pins = "gpio17";
+                                       function = "blsp_uart_tx_a2";
+                               };
+                       };
                };
 
                gcc: clock-controller@1800000 {
@@ -343,6 +355,8 @@
                        clock-names = "core", "iface";
                        dmas = <&blsp1_dma 5>, <&blsp1_dma 4>;
                        dma-names = "rx", "tx";
+                       pinctrl-names = "default";
+                       pinctrl-0 = <&blsp1_uart2_default>;
                        status = "okay";
                };