diff options
| author | Márton Németh <nm127@freemail.hu> | 2007-10-31 15:09:05 +0100 |
|---|---|---|
| committer | Richard Purdie <rpurdie@rpsys.net> | 2008-02-07 09:52:02 +0000 |
| commit | 92e015cb31c0a312bf2e0e5b96aef76a8c57e645 (patch) | |
| tree | 6df4b25865102607920b5c90f1271dfe2f3cc87e /drivers/leds | |
| parent | 4c79141d28bc290ae307e3f81f5bc909c26faf6e (diff) | |
| download | linux-92e015cb31c0a312bf2e0e5b96aef76a8c57e645.tar.gz linux-92e015cb31c0a312bf2e0e5b96aef76a8c57e645.tar.bz2 linux-92e015cb31c0a312bf2e0e5b96aef76a8c57e645.zip | |
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>
Diffstat (limited to 'drivers/leds')
| -rw-r--r-- | drivers/leds/Kconfig | 8 | ||||
| -rw-r--r-- | drivers/leds/leds-clevo-mail.c | 37 |
2 files changed, 42 insertions, 3 deletions
diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig index 659448ead685..922c3df548a5 100644 --- a/drivers/leds/Kconfig +++ b/drivers/leds/Kconfig @@ -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: diff --git a/drivers/leds/leds-clevo-mail.c b/drivers/leds/leds-clevo-mail.c index 49a7972459c9..6c3d33b8e383 100644 --- a/drivers/leds/leds-clevo-mail.c +++ b/drivers/leds/leds-clevo-mail.c @@ -92,9 +92,46 @@ static void clevo_mail_led_set(struct led_classdev *led_cdev, } +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) |