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Merge branch 'for-linus' of git://git.o-hand.com/linux-rpurdie-leds
* 'for-linus' of git://git.o-hand.com/linux-rpurdie-leds: leds: ledtrig-timer - on deactivation hardware blinking should be disabled leds: Add suspend/resume to the core class leds: Add WM8350 LED driver leds: leds-pcs9532 - Move i2c work to a workqueque leds: leds-pca9532 - fix memory leak and properly handle errors leds: Fix wrong loop direction on removal in leds-ams-delta leds: fix Cobalt Raq LED dependency leds: Fix sparse warning in leds-ams-delta leds: Fixup kdoc comment to match parameter names leds: Make header variable naming consistent leds: eds-pca9532: mark pca9532_event() static leds: ALIX.2 LEDs driver
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,181 @@ | ||
| /* | ||
| * LEDs driver for PCEngines ALIX.2 and ALIX.3 | ||
| * | ||
| * Copyright (C) 2008 Constantin Baranov <const@mimas.ru> | ||
| */ | ||
|
|
||
| #include <linux/err.h> | ||
| #include <linux/io.h> | ||
| #include <linux/kernel.h> | ||
| #include <linux/leds.h> | ||
| #include <linux/module.h> | ||
| #include <linux/platform_device.h> | ||
| #include <linux/string.h> | ||
|
|
||
| static int force = 0; | ||
| module_param(force, bool, 0444); | ||
| MODULE_PARM_DESC(force, "Assume system has ALIX.2 style LEDs"); | ||
|
|
||
| struct alix_led { | ||
| struct led_classdev cdev; | ||
| unsigned short port; | ||
| unsigned int on_value; | ||
| unsigned int off_value; | ||
| }; | ||
|
|
||
| static void alix_led_set(struct led_classdev *led_cdev, | ||
| enum led_brightness brightness) | ||
| { | ||
| struct alix_led *led_dev = | ||
| container_of(led_cdev, struct alix_led, cdev); | ||
|
|
||
| if (brightness) | ||
| outl(led_dev->on_value, led_dev->port); | ||
| else | ||
| outl(led_dev->off_value, led_dev->port); | ||
| } | ||
|
|
||
| static struct alix_led alix_leds[] = { | ||
| { | ||
| .cdev = { | ||
| .name = "alix:1", | ||
| .brightness_set = alix_led_set, | ||
| }, | ||
| .port = 0x6100, | ||
| .on_value = 1 << 22, | ||
| .off_value = 1 << 6, | ||
| }, | ||
| { | ||
| .cdev = { | ||
| .name = "alix:2", | ||
| .brightness_set = alix_led_set, | ||
| }, | ||
| .port = 0x6180, | ||
| .on_value = 1 << 25, | ||
| .off_value = 1 << 9, | ||
| }, | ||
| { | ||
| .cdev = { | ||
| .name = "alix:3", | ||
| .brightness_set = alix_led_set, | ||
| }, | ||
| .port = 0x6180, | ||
| .on_value = 1 << 27, | ||
| .off_value = 1 << 11, | ||
| }, | ||
| }; | ||
|
|
||
| static int __init alix_led_probe(struct platform_device *pdev) | ||
| { | ||
| int i; | ||
| int ret; | ||
|
|
||
| for (i = 0; i < ARRAY_SIZE(alix_leds); i++) { | ||
| alix_leds[i].cdev.flags |= LED_CORE_SUSPENDRESUME; | ||
| ret = led_classdev_register(&pdev->dev, &alix_leds[i].cdev); | ||
| if (ret < 0) | ||
| goto fail; | ||
| } | ||
| return 0; | ||
|
|
||
| fail: | ||
| while (--i >= 0) | ||
| led_classdev_unregister(&alix_leds[i].cdev); | ||
| return ret; | ||
| } | ||
|
|
||
| static int alix_led_remove(struct platform_device *pdev) | ||
| { | ||
| int i; | ||
|
|
||
| for (i = 0; i < ARRAY_SIZE(alix_leds); i++) | ||
| led_classdev_unregister(&alix_leds[i].cdev); | ||
| return 0; | ||
| } | ||
|
|
||
| static struct platform_driver alix_led_driver = { | ||
| .remove = alix_led_remove, | ||
| .driver = { | ||
| .name = KBUILD_MODNAME, | ||
| .owner = THIS_MODULE, | ||
| }, | ||
| }; | ||
|
|
||
| static int __init alix_present(void) | ||
| { | ||
| const unsigned long bios_phys = 0x000f0000; | ||
| const size_t bios_len = 0x00010000; | ||
| const char alix_sig[] = "PC Engines ALIX."; | ||
| const size_t alix_sig_len = sizeof(alix_sig) - 1; | ||
|
|
||
| const char *bios_virt; | ||
| const char *scan_end; | ||
| const char *p; | ||
| int ret = 0; | ||
|
|
||
| if (force) { | ||
| printk(KERN_NOTICE "%s: forced to skip BIOS test, " | ||
| "assume system has ALIX.2 style LEDs\n", | ||
| KBUILD_MODNAME); | ||
| ret = 1; | ||
| goto out; | ||
| } | ||
|
|
||
| bios_virt = phys_to_virt(bios_phys); | ||
| scan_end = bios_virt + bios_len - (alix_sig_len + 2); | ||
| for (p = bios_virt; p < scan_end; p++) { | ||
| const char *tail; | ||
|
|
||
| if (memcmp(p, alix_sig, alix_sig_len) != 0) { | ||
| continue; | ||
| } | ||
|
|
||
| tail = p + alix_sig_len; | ||
| if ((tail[0] == '2' || tail[0] == '3') && tail[1] == '\0') { | ||
| printk(KERN_INFO | ||
| "%s: system is recognized as \"%s\"\n", | ||
| KBUILD_MODNAME, p); | ||
| ret = 1; | ||
| break; | ||
| } | ||
| } | ||
|
|
||
| out: | ||
| return ret; | ||
| } | ||
|
|
||
| static struct platform_device *pdev; | ||
|
|
||
| static int __init alix_led_init(void) | ||
| { | ||
| int ret; | ||
|
|
||
| if (!alix_present()) { | ||
| ret = -ENODEV; | ||
| goto out; | ||
| } | ||
|
|
||
| pdev = platform_device_register_simple(KBUILD_MODNAME, -1, NULL, 0); | ||
| if (!IS_ERR(pdev)) { | ||
| ret = platform_driver_probe(&alix_led_driver, alix_led_probe); | ||
| if (ret) | ||
| platform_device_unregister(pdev); | ||
| } else | ||
| ret = PTR_ERR(pdev); | ||
|
|
||
| out: | ||
| return ret; | ||
| } | ||
|
|
||
| static void __exit alix_led_exit(void) | ||
| { | ||
| platform_device_unregister(pdev); | ||
| platform_driver_unregister(&alix_led_driver); | ||
| } | ||
|
|
||
| module_init(alix_led_init); | ||
| module_exit(alix_led_exit); | ||
|
|
||
| MODULE_AUTHOR("Constantin Baranov <const@mimas.ru>"); | ||
| MODULE_DESCRIPTION("PCEngines ALIX.2 and ALIX.3 LED driver"); | ||
| MODULE_LICENSE("GPL"); |
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