leds: hw acceleration for Clevo mail LED driver
Add support for hardware accelerated LED blinking for the mail LED
commonly found on Clevo notebooks.
Signed-off-by: Márton Németh <nm127@freemail.hu>
Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
diff --git a/drivers/leds/leds-clevo-mail.c b/drivers/leds/leds-clevo-mail.c
index 49a7972..6c3d33b 100644
--- a/drivers/leds/leds-clevo-mail.c
+++ b/drivers/leds/leds-clevo-mail.c
@@ -92,9 +92,46 @@
}
+static int clevo_mail_led_blink(struct led_classdev *led_cdev,
+ unsigned long* delay_on,
+ unsigned long* delay_off)
+{
+ int status = -EINVAL;
+
+ if (*delay_on == 0 /* ms */ && *delay_off == 0 /* ms */) {
+ /* Special case: the leds subsystem requested us to
+ * chose one user friendly blinking of the LED, and
+ * start it. Let's blink the led slowly (0.5Hz).
+ */
+ *delay_on = 1000; /* ms */
+ *delay_off = 1000; /* ms */
+ i8042_command(NULL, CLEVO_MAIL_LED_BLINK_0_5HZ);
+ status = 0;
+
+ } else if (*delay_on == 500 /* ms */ && *delay_off == 500 /* ms */) {
+ /* blink the led with 1Hz */
+ i8042_command(NULL, CLEVO_MAIL_LED_BLINK_1HZ);
+ status = 0;
+
+ } else if (*delay_on == 1000 /* ms */ && *delay_off == 1000 /* ms */) {
+ /* blink the led with 0.5Hz */
+ i8042_command(NULL, CLEVO_MAIL_LED_BLINK_0_5HZ);
+ status = 0;
+
+ } else {
+ printk(KERN_DEBUG KBUILD_MODNAME
+ ": clevo_mail_led_blink(..., %lu, %lu),"
+ " returning -EINVAL (unsupported)\n",
+ *delay_on, *delay_off);
+ }
+
+ return status;
+}
+
static struct led_classdev clevo_mail_led = {
.name = "clevo::mail",
.brightness_set = clevo_mail_led_set,
+ .blink_set = clevo_mail_led_blink,
};
static int __init clevo_mail_led_probe(struct platform_device *pdev)
