leds-clevo-mail: hw acceleration for Clevo mail LED driver
PATCH 4/4 leds-clevo-mail: hw acceleration for Clevo mail LED driver
From: Márton Németh <[email protected]>
Add support for hardware accelerated LED blinking for the mail LED commonly found on Clevo notebooks.
Signed-off-by Márton Németh <[email protected]>
---
drivers/leds/Kconfig +5 -3
@@ -122,9 +122,11 @@ config LEDS_CLEVO_MAIL programs through the leds subsystem. This LED have three known mode: off, blink at 0.5Hz and blink at 1Hz. - As this LED cannot change it's brightness it blinks instead. - The brightness value 0 means off, 1..127 means blink at 0.5Hz - and 128..255 means blink at 1Hz. + The driver supports two kinds of interface: using ledtrig-timer + or through /sys/class/leds/clevo::mail/brightness. As this LED + cannot change it's brightness it blinks instead. The brightness + value 0 means off, 1..127 means blink at 0.5Hz and 128..255 means + blink at 1Hz. This module can drive the mail LED for the following notebooks:
drivers/leds/leds-clevo-mail.c +37 -0
@@ -92,9 +92,46 @@ static void clevo_mail_led_set(struct le } +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)