diff mbox series

[v3,07/24] ARM: dts: samsung: exynos5420: Enable cros-ec-spi as wake source

Message ID 20231226122113.v3.7.I06b059021de1bf6103e60a73211f078f2af75d17@changeid (mailing list archive)
State Accepted
Commit 8f51b5290ff4f8a9f1c634cf42ca37cd9e90018c
Headers show
Series Improve IRQ wake capability reporting and update the cros_ec driver to use it | expand

Commit Message

Mark Hasemeyer Dec. 26, 2023, 7:21 p.m. UTC
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/samsung/exynos5420-peach-pit.dts | 1 +
 1 file changed, 1 insertion(+)

Comments

Krzysztof Kozlowski Dec. 27, 2023, 11:54 a.m. UTC | #1
On 26/12/2023 20:21, Mark Hasemeyer wrote:
> 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

This looks like changelog, although a bit confusing. If it is changelog,
then please keep it under ---.

I can fix it while applying, but this will be after the merge window.

Best regards,
Krzysztof
diff mbox series

Patch

diff --git a/arch/arm/boot/dts/samsung/exynos5420-peach-pit.dts b/arch/arm/boot/dts/samsung/exynos5420-peach-pit.dts
index 4e757b6e28e1c..3759742d38cac 100644
--- a/arch/arm/boot/dts/samsung/exynos5420-peach-pit.dts
+++ b/arch/arm/boot/dts/samsung/exynos5420-peach-pit.dts
@@ -967,6 +967,7 @@  cros_ec: cros-ec@0 {
 		reg = <0>;
 		spi-max-frequency = <3125000>;
 		google,has-vbc-nvram;
+		wakeup-source;
 
 		controller-data {
 			samsung,spi-feedback-delay = <1>;