[PATCH 01/11] arm64: dts: qcom: sc7280: Mark some nodes as 'reserved'

Luca Weiss
2023-08-30T18:35:39Z

With the standard Qualcomm TrustZone setup, components such as lpasscc,
pdc_reset and watchdog shouldn't be touched by Linux. Mark them with
the status 'reserved' and reeable them in the chrome-common dtsi.

Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
---
arch/arm64/boot/dts/qcom/sc7280-chrome-common.dtsi | 12 ++++++++++++
arch/arm64/boot/dts/qcom/sc7280.dtsi | 5 ++++-
2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/qcom/sc7280-chrome-common.dtsi b/arch/arm64/boot/dts/qcom/sc7280-chrome-common.dtsi
index 2e1cd219fc18..8eb30aa226a2 100644
--- a/arch/arm64/boot/dts/qcom/sc7280-chrome-common.dtsi
+++ b/arch/arm64/boot/dts/qcom/sc7280-chrome-common.dtsi
@@ -46,6 +46,14 @@ wpss_mem: memory@9ae00000 {
};
};

+&lpasscc {
+ status = "okay";
+};
+
+&pdc_reset {
+ status = "okay";
+};
+
/* The PMIC PON code isn't compatible w/ how Chrome EC/BIOS handle things. */
&pmk8350_pon {
status = "disabled";
@@ -84,6 +92,10 @@ &scm {
dma-coherent;
};

+&watchdog {
+ status = "okay";
+};
+
&wifi {
status = "okay";

diff --git a/arch/arm64/boot/dts/qcom/sc7280.dtsi b/arch/arm64/boot/dts/qcom/sc7280.dtsi
index 042908048d09..98a8d627a348 100644
--- a/arch/arm64/boot/dts/qcom/sc7280.dtsi
+++ b/arch/arm64/boot/dts/qcom/sc7280.dtsi
@@ -2267,6 +2267,7 @@ lpasscc: lpasscc@3000000 {
clocks = <&gcc GCC_CFG_NOC_LPASS_CLK>;
clock-names = "iface";
#clock-cells = <1>;
+ status = "reserved";
};

lpass_rx_macro: codec@3200000 {
@@ -4216,6 +4217,7 @@ pdc_reset: reset-controller@b5e0000 {
compatible = "qcom,sc7280-pdc-global";
reg = <0 0x0b5e0000 0 0x20000>;
#reset-cells = <1>;
+ status = "reserved";
};

tsens0: thermal-sensor@c263000 {
@@ -5212,11 +5214,12 @@ msi-controller@17a40000 {
};
};

- watchdog@17c10000 {
+ watchdog: watchdog@17c10000 {
compatible = "qcom,apss-wdt-sc7280", "qcom,kpss-wdt";
reg = <0 0x17c10000 0 0x1000>;
clocks = <&sleep_clk>;
interrupts = <GIC_SPI 0 IRQ_TYPE_LEVEL_HIGH>;
+ status = "reserved";
};

timer@17c20000 {

--
2.42.0