3 files changed, 156 insertions, 0 deletions

diff --git a/drivers/macintosh/Kconfig b/drivers/macintosh/Kconfig
index 37cd6ee4586b..062dac26f2ae 100644
--- a/drivers/macintosh/Kconfig
+++ b/drivers/macintosh/Kconfig
@@ -78,6 +78,17 @@ config ADB_PMU
           this device; you should do so if your machine is one of those
           mentioned above.
 
+config ADB_PMU_LED
+        bool "Support for the Power/iBook front LED"
+        depends on ADB_PMU
+        select LEDS_CLASS
+        help
+          Support the front LED on Power/iBooks as a generic LED that can
+          be triggered by any of the supported triggers. To get the
+          behaviour of the old CONFIG_BLK_DEV_IDE_PMAC_BLINK, select this
+          and the ide-disk LED trigger and configure appropriately through
+          sysfs.
+
 config PMAC_SMU
         bool "Support for SMU  based PowerMacs"
         depends on PPC_PMAC64
diff --git a/drivers/macintosh/Makefile b/drivers/macintosh/Makefile
index 45a268f8047e..b53d45f87b0b 100644
--- a/drivers/macintosh/Makefile
+++ b/drivers/macintosh/Makefile
@@ -12,6 +12,7 @@ obj-$(CONFIG_INPUT_ADBHID)	+= adbhid.o
 obj-$(CONFIG_ANSLCD)            += ans-lcd.o
 
 obj-$(CONFIG_ADB_PMU)           += via-pmu.o via-pmu-event.o
+obj-$(CONFIG_ADB_PMU_LED)       += via-pmu-led.o
 obj-$(CONFIG_PMAC_BACKLIGHT)    += via-pmu-backlight.o
 obj-$(CONFIG_ADB_CUDA)          += via-cuda.o
 obj-$(CONFIG_PMAC_APM_EMU)      += apm_emu.o
diff --git a/drivers/macintosh/via-pmu-led.c b/drivers/macintosh/via-pmu-led.c
new file mode 100644
index 000000000000..af8375ed0f5e
--- /dev/null
+++ b/drivers/macintosh/via-pmu-led.c
@@ -0,0 +1,144 @@
+/*
+ * via-pmu LED class device
+ *
+ * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ * NON INFRINGEMENT.  See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+ *
+ */
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/leds.h>
+#include <linux/adb.h>
+#include <linux/pmu.h>
+#include <asm/prom.h>
+
+static spinlock_t pmu_blink_lock;
+static struct adb_request pmu_blink_req;
+/* -1: no change, 0: request off, 1: request on */
+static int requested_change;
+static int sleeping;
+
+static void pmu_req_done(struct adb_request * req)
+{
+        unsigned long flags;
+
+        spin_lock_irqsave(&pmu_blink_lock, flags);
+        /* if someone requested a change in the meantime
+         * (we only see the last one which is fine)
+         * then apply it now */
+        if (requested_change != -1 && !sleeping)
+                pmu_request(&pmu_blink_req, NULL, 4, 0xee, 4, 0, requested_change);
+        /* reset requested change */
+        requested_change = -1;
+        spin_unlock_irqrestore(&pmu_blink_lock, flags);
+}
+
+static void pmu_led_set(struct led_classdev *led_cdev,
+                        enum led_brightness brightness)
+{
+        unsigned long flags;
+
+        spin_lock_irqsave(&pmu_blink_lock, flags);
+        switch (brightness) {
+        case LED_OFF:
+                requested_change = 0;
+                break;
+        case LED_FULL:
+                requested_change = 1;
+                break;
+        default:
+                goto out;
+                break;
+        }
+        /* if request isn't done, then don't do anything */
+        if (pmu_blink_req.complete && !sleeping)
+                pmu_request(&pmu_blink_req, NULL, 4, 0xee, 4, 0, requested_change);
+ out:
+        spin_unlock_irqrestore(&pmu_blink_lock, flags);
+}
+
+static struct led_classdev pmu_led = {
+        .name = "pmu-front-led",
+#ifdef CONFIG_BLK_DEV_IDE_PMAC_BLINK
+        .default_trigger = "ide-disk",
+#endif
+        .brightness_set = pmu_led_set,
+};
+
+#ifdef CONFIG_PM
+static int pmu_led_sleep_call(struct pmu_sleep_notifier *self, int when)
+{
+        unsigned long flags;
+
+        spin_lock_irqsave(&pmu_blink_lock, flags);
+
+        switch (when) {
+        case PBOOK_SLEEP_REQUEST:
+                sleeping = 1;
+                break;
+        case PBOOK_WAKE:
+                sleeping = 0;
+                break;
+        default:
+                /* do nothing */
+                break;
+        }
+        spin_unlock_irqrestore(&pmu_blink_lock, flags);
+
+        return PBOOK_SLEEP_OK;
+}
+
+static struct pmu_sleep_notifier via_pmu_led_sleep_notif = {
+        .notifier_call = pmu_led_sleep_call,
+};
+#endif
+
+static int __init via_pmu_led_init(void)
+{
+        struct device_node *dt;
+        const char *model;
+
+        /* only do this on keylargo based models */
+        if (pmu_get_model() != PMU_KEYLARGO_BASED)
+                return -ENODEV;
+
+        dt = of_find_node_by_path("/");
+        if (dt == NULL)
+                return -ENODEV;
+        model = (const char *)get_property(dt, "model", NULL);
+        if (model == NULL)
+                return -ENODEV;
+        if (strncmp(model, "PowerBook", strlen("PowerBook")) != 0 &&
+            strncmp(model, "iBook", strlen("iBook")) != 0) {
+                of_node_put(dt);
+                /* ignore */
+                return -ENODEV;
+        }
+        of_node_put(dt);
+
+        spin_lock_init(&pmu_blink_lock);
+        /* no outstanding req */
+        pmu_blink_req.complete = 1;
+        pmu_blink_req.done = pmu_req_done;
+#ifdef CONFIG_PM
+        pmu_register_sleep_notifier(&via_pmu_led_sleep_notif);
+#endif
+        return led_classdev_register(NULL, &pmu_led);
+}
+
+late_initcall(via_pmu_led_init);