From 92e015cb31c0a312bf2e0e5b96aef76a8c57e645 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?M=C3=A1rton=20N=C3=A9meth?= <nm127@freemail.hu>
Date: Wed, 31 Oct 2007 15:09:05 +0100
Subject: [PATCH] leds: hw acceleration for Clevo mail LED driver
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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>
---
drivers/leds/Kconfig | 8 +++++---
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 659448ead6858..922c3df548a54 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 49a7972459c94..6c3d33b8e3830 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)
--
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