ENGR00144309 do nothing if the core frequency is not changed
authorLily Zhang <r58066@freescale.com>
Tue, 28 Jun 2011 21:51:16 +0000 (16:51 -0500)
committerMatt Sealey <matt@genesi-usa.com>
Tue, 28 Jun 2011 21:51:16 +0000 (16:51 -0500)
commit9dd0f3b99a7daf40cedce6248ca93481e1fb5611
treeb9671b81387d8e94796ea3f2670e20f50b75676d
parent6059f7ef57ec5734e548d66ac5ffc44b819e0059
ENGR00144309 do nothing if the core frequency is not changed

When the system enters low bus frequency mode by executing the
following operations, the system enters dead loop to check
arm_podf_busy bit:

1. Store the rootfs on SD card.
2. type "echo 8 > /proc/sys/kernel/printk"
3. type "echo 1 > /sys/devices/platform/mxc_dvfs_core.0/enable"
4. type "ifconfig eth0 down"
5. type "echo 1 > /sys/class/graphics/fb0/blank"
6. The system enters low bus frequency mode. And it keeps

to print "ARM_PODF still in busy!!!!"
arch/arm/plat-mxc/dvfs_core.c