add support for target 3c24xx (more known as Openmoko GTA02 "Freerunner") and merge it with the openmoko-target and the work Michael Buesch <mb> did

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@13609 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 86 insertions, 0 deletions

diff --git a/target/linux/s3c24xx/patches/0058-fix-pcf50633-LOWBAT-kill-init.patch.patch b/target/linux/s3c24xx/patches/0058-fix-pcf50633-LOWBAT-kill-init.patch.patch
new file mode 100755
index 0000000000..429a8c7dd9
--- /dev/null
+++ b/target/linux/s3c24xx/patches/0058-fix-pcf50633-LOWBAT-kill-init.patch.patch
@@ -0,0 +1,86 @@
+From 6d3172ba9f1b4a650c8fdb3b6e11dc71852fe6d1 Mon Sep 17 00:00:00 2001
+From: mokopatches <mokopatches@openmoko.org>
+Date: Fri, 25 Jul 2008 22:21:25 +0100
+Subject: [PATCH] fix-pcf50633-LOWBAT-kill-init.patch
+
+---
+ drivers/i2c/chips/pcf50633.c |   56 ++++++++++++++++++++++++++++++++++++-----
+ 1 files changed, 49 insertions(+), 7 deletions(-)
+
+diff --git a/drivers/i2c/chips/pcf50633.c b/drivers/i2c/chips/pcf50633.c
+index 0cf5e53..fc1262e 100644
+--- a/drivers/i2c/chips/pcf50633.c
++++ b/drivers/i2c/chips/pcf50633.c
+@@ -690,8 +690,20 @@ static void pcf50633_work(struct work_struct *work)
+ 			if (pcf->onkey_seconds >=
+ 			    pcf->pdata->onkey_seconds_sig_init) {
+ 				/* Ask init to do 'ctrlaltdel' */
+-				DEBUGPC("SIGINT(init) ");
+-				kill_proc(1, SIGINT, 1);
++				/*
++				 * currently Linux reacts badly to issuing a
++				 * signal to PID #1 before init is started.
++				 * What happens is that the next kernel thread
++				 * to start, which is the JFFS2 Garbage
++				 * collector in our case, gets the signal
++				 * instead and proceeds to fail to fork --
++				 * which is very bad.  Therefore we confirm
++				 * PID #1 exists before issuing the signal
++				 */
++				if (find_task_by_pid(1)) {
++					DEBUGPC("SIGINT(init) ");
++					kill_proc(1, SIGINT, 1);
++				}
+ 				/* FIXME: what if userspace doesn't shut down? */
+ 			}
+ 			if (pcf->onkey_seconds >=
+@@ -790,11 +802,41 @@ static void pcf50633_work(struct work_struct *work)
+ 	}
+ 
+ 	if (pcfirq[3] & (PCF50633_INT4_LOWBAT|PCF50633_INT4_LOWSYS)) {
+-		/* Really low battery voltage, we have 8 seconds left */
+-		DEBUGPC("LOWBAT ");
+-		apm_queue_event(APM_LOW_BATTERY);
+-		DEBUGPC("SIGPWR(init) ");
+-		kill_proc(1, SIGPWR, 1);
++		if ((__reg_read(pcf, PCF50633_REG_MBCS1) &
++		    (PCF50633_MBCS1_USBPRES | PCF50633_MBCS1_USBOK)) ==
++		    (PCF50633_MBCS1_USBPRES | PCF50633_MBCS1_USBOK)) {
++			/*
++			 * hey no need to freak out, we have some kind of
++			 * valid charger power
++			 */
++			DEBUGPC("(NO)BAT ");
++		} else {
++			/* Really low battery voltage, we have 8 seconds left */
++			DEBUGPC("LOWBAT ");
++			/*
++			 * currently Linux reacts badly to issuing a signal to
++			 * PID #1 before init is started.  What happens is that
++			 * the next kernel thread to start, which is the JFFS2
++			 * Garbage collector in our case, gets the signal
++			 * instead and proceeds to fail to fork -- which is
++			 * very bad.  Therefore we confirm PID #1 exists
++			 * before issuing SPIGPWR
++			 */
++			if (find_task_by_pid(1)) {
++				apm_queue_event(APM_LOW_BATTERY);
++				DEBUGPC("SIGPWR(init) ");
++				kill_proc(1, SIGPWR, 1);
++			} else
++				/*
++				 * well, our situation is like this:  we do not
++				 * have any external power, we have a low
++				 * battery and since PID #1 doesn't exist yet,
++				 * we are early in the boot, likely before
++				 * rootfs mount.  We should just call it a day
++				 */
++				apm_queue_event(APM_CRITICAL_SUSPEND);
++		}
++
+ 		/* Tell PMU we are taking care of this */
+ 		reg_set_bit_mask(pcf, PCF50633_REG_OOCSHDWN,
+ 				 PCF50633_OOCSHDWN_TOTRST,
+-- 
+1.5.6.3
+