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 <[email protected]>
Reviewed-by: Konrad Dybcio <[email protected]>
---
arch/arm64/boot/dts/qcom/Makefile | 1 +
.../boot/dts/qcom/msm8916-acer-a1-724.dts | 217 ++++++++++++++++++
2 files changed, 218 insertions(+)
create mode 100644 arch/arm64/boot/dts/qcom/msm8916-acer-a1-724.dts
diff --git a/arch/arm64/boot/dts/qcom/Makefile b/arch/arm64/boot/dts/qcom/Makefile
index afe496a93f94..f38a20074013 100644
--- 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
index 000000000000..593051ea92b6
--- /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;
+ };
+};
--
2.30.2