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author | 2015-08-04 12:17:53 -0700 | |
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committer | 2015-08-04 15:44:42 -0700 | |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/arm/mach-footbridge/ebsa285.c | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/arch/arm/mach-footbridge/ebsa285.c')
-rw-r--r-- | kernel/arch/arm/mach-footbridge/ebsa285.c | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/kernel/arch/arm/mach-footbridge/ebsa285.c b/kernel/arch/arm/mach-footbridge/ebsa285.c new file mode 100644 index 000000000..aee8300f3 --- /dev/null +++ b/kernel/arch/arm/mach-footbridge/ebsa285.c @@ -0,0 +1,123 @@ +/* + * linux/arch/arm/mach-footbridge/ebsa285.c + * + * EBSA285 machine fixup + */ +#include <linux/init.h> +#include <linux/io.h> +#include <linux/spinlock.h> +#include <linux/slab.h> +#include <linux/leds.h> + +#include <asm/hardware/dec21285.h> +#include <asm/mach-types.h> + +#include <asm/mach/arch.h> + +#include "common.h" + +/* LEDs */ +#if defined(CONFIG_NEW_LEDS) && defined(CONFIG_LEDS_CLASS) +#define XBUS_AMBER_L BIT(0) +#define XBUS_GREEN_L BIT(1) +#define XBUS_RED_L BIT(2) +#define XBUS_TOGGLE BIT(7) + +struct ebsa285_led { + struct led_classdev cdev; + u8 mask; +}; + +/* + * The triggers lines up below will only be used if the + * LED triggers are compiled in. + */ +static const struct { + const char *name; + const char *trigger; +} ebsa285_leds[] = { + { "ebsa285:amber", "cpu0", }, + { "ebsa285:green", "heartbeat", }, + { "ebsa285:red",}, +}; + +static unsigned char hw_led_state; +static void __iomem *xbus; + +static void ebsa285_led_set(struct led_classdev *cdev, + enum led_brightness b) +{ + struct ebsa285_led *led = container_of(cdev, + struct ebsa285_led, cdev); + + if (b == LED_OFF) + hw_led_state |= led->mask; + else + hw_led_state &= ~led->mask; + writeb(hw_led_state, xbus); +} + +static enum led_brightness ebsa285_led_get(struct led_classdev *cdev) +{ + struct ebsa285_led *led = container_of(cdev, + struct ebsa285_led, cdev); + + return hw_led_state & led->mask ? LED_OFF : LED_FULL; +} + +static int __init ebsa285_leds_init(void) +{ + int i; + + if (!machine_is_ebsa285()) + return -ENODEV; + + xbus = ioremap(XBUS_CS2, SZ_4K); + if (!xbus) + return -ENOMEM; + + /* 3 LEDS all off */ + hw_led_state = XBUS_AMBER_L | XBUS_GREEN_L | XBUS_RED_L; + writeb(hw_led_state, xbus); + + for (i = 0; i < ARRAY_SIZE(ebsa285_leds); i++) { + struct ebsa285_led *led; + + led = kzalloc(sizeof(*led), GFP_KERNEL); + if (!led) + break; + + led->cdev.name = ebsa285_leds[i].name; + led->cdev.brightness_set = ebsa285_led_set; + led->cdev.brightness_get = ebsa285_led_get; + led->cdev.default_trigger = ebsa285_leds[i].trigger; + led->mask = BIT(i); + + if (led_classdev_register(NULL, &led->cdev) < 0) { + kfree(led); + break; + } + } + + return 0; +} + +/* + * Since we may have triggers on any subsystem, defer registration + * until after subsystem_init. + */ +fs_initcall(ebsa285_leds_init); +#endif + +MACHINE_START(EBSA285, "EBSA285") + /* Maintainer: Russell King */ + .atag_offset = 0x100, + .video_start = 0x000a0000, + .video_end = 0x000bffff, + .map_io = footbridge_map_io, + .init_early = footbridge_sched_clock, + .init_irq = footbridge_init_irq, + .init_time = footbridge_timer_init, + .restart = footbridge_restart, +MACHINE_END + |