[PATCH v3 05/24] ARM: dts: tegra: Enable cros-ec-spi as wake source

Mark Hasemeyer
2023-12-26T19:22:07Z

The cros_ec driver currently assumes that cros-ec-spi compatible device
nodes are a wakeup-source even though the wakeup-source property is not
defined.

Some Chromebooks use a separate wake pin, while others overload the
interrupt for wake and IO. With the current assumption, spurious wakes
can occur on systems that use a separate wake pin. It is planned to
update the driver to no longer assume that the EC interrupt pin should
be enabled for wake.

Add the wakeup-source property to all cros-ec-spi compatible device
nodes to signify to the driver that they should still be a valid wakeup
source.

-Commit-changes: 3
-Update commit message to provide details of the motivation behind the
change

Signed-off-by: Mark Hasemeyer <markhas@chromium.org>
---

(no changes since v2)

Changes in v2:
-Split by arch/soc

arch/arm/boot/dts/nvidia/tegra124-nyan.dtsi | 1 +
arch/arm/boot/dts/nvidia/tegra124-venice2.dts | 1 +
2 files changed, 2 insertions(+)

diff --git a/arch/arm/boot/dts/nvidia/tegra124-nyan.dtsi b/arch/arm/boot/dts/nvidia/tegra124-nyan.dtsi
index a2ee371802004..8125c1b3e8d79 100644
--- a/arch/arm/boot/dts/nvidia/tegra124-nyan.dtsi
+++ b/arch/arm/boot/dts/nvidia/tegra124-nyan.dtsi
@@ -338,6 +338,7 @@ cros_ec: cros-ec@0 {
interrupt-parent = <&gpio>;
interrupts = <TEGRA_GPIO(C, 7) IRQ_TYPE_LEVEL_LOW>;
reg = <0>;
+ wakeup-source;

google,cros-ec-spi-msg-delay = <2000>;

diff --git a/arch/arm/boot/dts/nvidia/tegra124-venice2.dts b/arch/arm/boot/dts/nvidia/tegra124-venice2.dts
index 3924ee385dee0..df98dc2a67b85 100644
--- a/arch/arm/boot/dts/nvidia/tegra124-venice2.dts
+++ b/arch/arm/boot/dts/nvidia/tegra124-venice2.dts
@@ -857,6 +857,7 @@ cros_ec: cros-ec@0 {
interrupt-parent = <&gpio>;
interrupts = <TEGRA_GPIO(C, 7) IRQ_TYPE_LEVEL_LOW>;
reg = <0>;
+ wakeup-source;

google,cros-ec-spi-msg-delay = <2000>;

--
2.43.0.472.g3155946c3a-goog