[PATCH 2/2] platform/apple-gmux: use apple_brightness to save brightness to EFI

Atharva Tiwari
2026-02-06T12:57:19Z

use apple_brightness to save brightness to EFI.

(tested on iMac20,1)

Signed-off-by: Atharva Tiwari <atharvatiwarilinuxdev@gmail.com>
---
drivers/platform/x86/apple-gmux.c | 7 +++++++
1 file changed, 7 insertions(+)

diff --git a/drivers/platform/x86/apple-gmux.c b/drivers/platform/x86/apple-gmux.c
index 1417e230edbd..cfb20c115eb0 100644
--- a/drivers/platform/x86/apple-gmux.c
+++ b/drivers/platform/x86/apple-gmux.c
@@ -22,6 +22,7 @@
#include <linux/pci.h>
#include <linux/vga_switcheroo.h>
#include <linux/debugfs.h>
+#include <linux/platform_data/apple-brightness.h>
#include <acpi/video.h>
#include <asm/io.h>

@@ -960,6 +961,12 @@ static int gmux_probe(struct pnp_dev *pnp, const struct pnp_device_id *id)
}

gmux_init_debugfs(gmux_data);
+ if (IS_ENABLED(CONFIG_APPLE_BRIGHTNESS)) {
+ ret = apple_brightness_probe(gmux_data->bdev, &gmux_get_brightness);
+ if (ret)
+ pr_warn("Unable to Enable EFI brightness saver: %d\n", ret);
+ }
+
return 0;

err_register_handler:
--
2.43.0