Unverified Commit 3c79c2e2 authored by Sebastian Reichel's avatar Sebastian Reichel Committed by Ilpo Järvinen
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platform: arm64: thinkpad-t14s-ec: add suspend handler for keyboard backlight 



This ensures that the keyboard backlight state is restored after
a suspend-resume cycle. Otherwise the keyboard is automatically
disabled during suspend and then stays disabled after resume.

Note, that this adopts the same behavior as the existing Thinkpad
ACPI driver.

Signed-off-by: default avatarSebastian Reichel <sre@kernel.org>
Link: https://patch.msgid.link/20251119-thinkpad-t14s-ec-improvements-v2-4-441219857c02@kernel.org


Reviewed-by: default avatarIlpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: default avatarIlpo Järvinen <ilpo.jarvinen@linux.intel.com>
parent fc62cb6a

drivers/platform/arm64/lenovo-thinkpad-t14s.c

+4 −0
Original line number Diff line number Diff line
@@ -606,6 +606,8 @@ static int t14s_ec_suspend(struct device *dev) 
{

	struct t14s_ec *ec = dev_get_drvdata(dev);



	led_classdev_suspend(&ec->kbd_backlight);



	t14s_ec_write_sequence(ec, T14S_EC_REG_MODERN_STANDBY,

			       T14S_EC_MODERN_STANDBY_ENTRY, 3);
@@ -619,6 +621,8 @@ static int t14s_ec_resume(struct device *dev) 
	t14s_ec_write_sequence(ec, T14S_EC_REG_MODERN_STANDBY,

			       T14S_EC_MODERN_STANDBY_EXIT, 3);



	led_classdev_resume(&ec->kbd_backlight);



	return 0;

}