arm64: dts: qcom: msm8916-acer-a1-724: Add initial device tree

Acer Iconia Talk S A1-724 is a tablet using the MSM8916 SoC released
in 2014.

Note: The original firmware from Acer can only boot 32-bit kernels.
To boot arm64 kernels it is necessary to flash 64-bit TZ/HYP firmware
with EDL, e.g. taken from the DragonBoard 410c. This works because Acer
didn't set up (firmware) secure boot.

Add a device tree for with initial support for:

- GPIO keys
- pm8916-vibrator
- SDHCI (internal and external storage)
- USB Device Mode
- UART
- WCNSS (WiFi/BT)
- Regulators

Signed-off-by: Lin, Meng-Bo <linmengbo0689@protonmail.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221123033817.149007-1-linmengbo0689@protonmail.com

diff --git a/arch/arm64/boot/dts/qcom/Makefile b/arch/arm64/boot/dts/qcom/Makefile
index 3e79496..60de22c 100644 (file)
--- a/arch/arm64/boot/dts/qcom/Makefile
+++ b/arch/arm64/boot/dts/qcom/Makefile
@@ -7,6 +7,7 @@ dtb-$(CONFIG_ARCH_QCOM) += ipq6018-cp01-c1.dtb
 dtb-$(CONFIG_ARCH_QCOM)        += ipq8074-hk01.dtb
 dtb-$(CONFIG_ARCH_QCOM)        += ipq8074-hk10-c1.dtb
 dtb-$(CONFIG_ARCH_QCOM)        += ipq8074-hk10-c2.dtb
+dtb-$(CONFIG_ARCH_QCOM)        += msm8916-acer-a1-724.dtb
 dtb-$(CONFIG_ARCH_QCOM)        += msm8916-alcatel-idol347.dtb
 dtb-$(CONFIG_ARCH_QCOM)        += msm8916-asus-z00l.dtb
 dtb-$(CONFIG_ARCH_QCOM)        += msm8916-huawei-g7.dtb

diff --git a/arch/arm64/boot/dts/qcom/msm8916-acer-a1-724.dts b/arch/arm64/boot/dts/qcom/msm8916-acer-a1-724.dts
new file mode 100644 (file)
index 0000000..593051e
--- /dev/null
+++ b/arch/arm64/boot/dts/qcom/msm8916-acer-a1-724.dts
@@ -0,0 +1,217 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+/dts-v1/;
+
+#include "msm8916-pm8916.dtsi"
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
+/*
+ * NOTE: The original firmware from Acer can only boot 32-bit kernels.
+ * To boot this device tree using arm64 it is necessary to flash 64-bit
+ * TZ/HYP firmware (e.g. taken from the DragonBoard 410c).
+ * See https://wiki.postmarketos.org/wiki/Acer_Iconia_Talk_S_(acer-a1-724)
+ * for suggested installation instructions.
+ */
+
+/ {
+       model = "Acer Iconia Talk S A1-724";
+       compatible = "acer,a1-724", "qcom,msm8916";
+       chassis-type = "tablet";
+
+       aliases {
+               serial0 = &blsp1_uart2;
+       };
+
+       chosen {
+               stdout-path = "serial0";
+       };
+
+       gpio-keys {
+               compatible = "gpio-keys";
+
+               pinctrl-names = "default";
+               pinctrl-0 = <&gpio_keys_default>;
+
+               label = "GPIO Buttons";
+
+               button-volume-up {
+                       label = "Volume Up";
+                       gpios = <&msmgpio 107 GPIO_ACTIVE_LOW>;
+                       linux,code = <KEY_VOLUMEUP>;
+               };
+       };
+
+       usb_id: usb-id {
+               compatible = "linux,extcon-usb-gpio";
+               id-gpio = <&msmgpio 110 GPIO_ACTIVE_HIGH>;
+               pinctrl-names = "default";
+               pinctrl-0 = <&usb_id_default>;
+       };
+};
+
+&blsp1_uart2 {
+       status = "okay";
+};
+
+&pm8916_resin {
+       linux,code = <KEY_VOLUMEDOWN>;
+       status = "okay";
+};
+
+&pm8916_vib {
+       status = "okay";
+};
+
+&pronto {
+       status = "okay";
+};
+
+&sdhc_1 {
+       pinctrl-names = "default", "sleep";
+       pinctrl-0 = <&sdc1_clk_on &sdc1_cmd_on &sdc1_data_on>;
+       pinctrl-1 = <&sdc1_clk_off &sdc1_cmd_off &sdc1_data_off>;
+
+       status = "okay";
+};
+
+&sdhc_2 {
+       pinctrl-names = "default", "sleep";
+       pinctrl-0 = <&sdc2_clk_on &sdc2_cmd_on &sdc2_data_on>;
+       pinctrl-1 = <&sdc2_clk_off &sdc2_cmd_off &sdc2_data_off>;
+
+       cd-gpios = <&msmgpio 38 GPIO_ACTIVE_HIGH>;
+
+       status = "okay";
+};
+
+&usb {
+       extcon = <&usb_id>, <&usb_id>;
+       status = "okay";
+};
+
+&usb_hs_phy {
+       extcon = <&usb_id>;
+};
+
+&smd_rpm_regulators {
+       vdd_l1_l2_l3-supply = <&pm8916_s3>;
+       vdd_l4_l5_l6-supply = <&pm8916_s4>;
+       vdd_l7-supply = <&pm8916_s4>;
+
+       s3 {
+               regulator-min-microvolt = <1200000>;
+               regulator-max-microvolt = <1300000>;
+       };
+
+       s4 {
+               regulator-min-microvolt = <1800000>;
+               regulator-max-microvolt = <2100000>;
+       };
+
+       l1 {
+               regulator-min-microvolt = <1225000>;
+               regulator-max-microvolt = <1225000>;
+       };
+
+       l2 {
+               regulator-min-microvolt = <1200000>;
+               regulator-max-microvolt = <1200000>;
+       };
+
+       l4 {
+               regulator-min-microvolt = <2050000>;
+               regulator-max-microvolt = <2050000>;
+       };
+
+       l5 {
+               regulator-min-microvolt = <1800000>;
+               regulator-max-microvolt = <1800000>;
+       };
+
+       l6 {
+               regulator-min-microvolt = <1800000>;
+               regulator-max-microvolt = <1800000>;
+       };
+
+       l7 {
+               regulator-min-microvolt = <1800000>;
+               regulator-max-microvolt = <1800000>;
+       };
+
+       l8 {
+               regulator-min-microvolt = <2850000>;
+               regulator-max-microvolt = <2900000>;
+       };
+
+       l9 {
+               regulator-min-microvolt = <3300000>;
+               regulator-max-microvolt = <3300000>;
+       };
+
+       l10 {
+               regulator-min-microvolt = <2700000>;
+               regulator-max-microvolt = <2800000>;
+       };
+
+       l11 {
+               regulator-min-microvolt = <1800000>;
+               regulator-max-microvolt = <2950000>;
+               regulator-system-load = <200000>;
+               regulator-allow-set-load;
+       };
+
+       l12 {
+               regulator-min-microvolt = <1800000>;
+               regulator-max-microvolt = <2950000>;
+       };
+
+       l13 {
+               regulator-min-microvolt = <3075000>;
+               regulator-max-microvolt = <3075000>;
+       };
+
+       l14 {
+               regulator-min-microvolt = <1800000>;
+               regulator-max-microvolt = <3300000>;
+       };
+
+       l15 {
+               regulator-min-microvolt = <1800000>;
+               regulator-max-microvolt = <3300000>;
+       };
+
+       l16 {
+               regulator-min-microvolt = <2900000>;
+               regulator-max-microvolt = <2900000>;
+       };
+
+       l17 {
+               regulator-min-microvolt = <2850000>;
+               regulator-max-microvolt = <2850000>;
+       };
+
+       l18 {
+               regulator-min-microvolt = <2700000>;
+               regulator-max-microvolt = <2700000>;
+       };
+};
+
+&msmgpio {
+       gpio_keys_default: gpio-keys-default-state {
+               pins = "gpio107";
+               function = "gpio";
+
+               drive-strength = <2>;
+               bias-pull-up;
+       };
+
+       usb_id_default: usb-id-default-state {
+               pins = "gpio110";
+               function = "gpio";
+
+               drive-strength = <8>;
+               bias-pull-up;
+       };
+};