arm64: dts: qcom: rb5: Add support for uSD card

Add support for uSD card on RB5 using the SDHC2 interface.

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
[DB: disabled 1.8V support to get SDHC to work]
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20201028190955.1264526-2-dmitry.baryshkov@linaro.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

diff --git a/arch/arm64/boot/dts/qcom/qrb5165-rb5.dts b/arch/arm64/boot/dts/qcom/qrb5165-rb5.dts
index fec31655141c1233cdd0435d72dda4ef99788b33..bc8d63a59598c62f991421942d8666b174919096 100644 (file)
--- a/arch/arm64/boot/dts/qcom/qrb5165-rb5.dts
+++ b/arch/arm64/boot/dts/qcom/qrb5165-rb5.dts
@@ -18,6 +18,7 @@
 
        aliases {
                serial0 = &uart12;
+               sdhc2 = &sdhc_2;
        };
 
        chosen {
@@ -475,6 +476,20 @@
        status = "okay";
 };
 
+&sdhc_2 {
+       status = "okay";
+       pinctrl-names = "default";
+       pinctrl-0 = <&sdc2_default_state &sdc2_card_det_n>;
+       vmmc-supply = <&vreg_l9c_2p96>;
+       vqmmc-supply = <&vreg_l6c_2p96>;
+       cd-gpios = <&tlmm 77 GPIO_ACTIVE_LOW>;
+       bus-width = <4>;
+       /* there seem to be issues with HS400-1.8V mode, so disable it */
+       no-1-8-v;
+       no-sdio;
+       no-emmc;
+};
+
 /* CAN */
 &spi0 {
        status = "okay";
@@ -663,6 +678,32 @@
                "HST_BLE_SNS_UART_RX",
                "HST_WLAN_UART_TX",
                "HST_WLAN_UART_RX";
+
+       sdc2_default_state: sdc2-default {
+               clk {
+                       pins = "sdc2_clk";
+                       bias-disable;
+                       drive-strength = <16>;
+               };
+
+               cmd {
+                       pins = "sdc2_cmd";
+                       bias-pull-up;
+                       drive-strength = <16>;
+               };
+
+               data {
+                       pins = "sdc2_data";
+                       bias-pull-up;
+                       drive-strength = <16>;
+               };
+       };
+
+       sdc2_card_det_n: sd-card-det-n {
+               pins = "gpio77";
+               function = "gpio";
+               bias-pull-up;
+       };
 };
 
 &uart12 {