u-boot-brain/arch/arm/cpu/armv7/s5p-common
Gabe Black 34b5ee1f6a Exynos: Avoid a divide by zero by specifying a non-zero period for pwm 4
The pwm_config function in the exynos pwm driver divides by its period
period parameter. A function was calling pwm_config with a 0ns period and a
0ns duty cycle. That doesn't actually make any sense physically, and results
in a divide by zero in the driver. This change changes the parameters to be a
100000ns period and duty cycle.

Test with command "sf probe 1:0; time sf read 40008000 0 1000".
Try with different numbers of bytes and see that sane values are obtained
Build and boot U-boot with this patch, backlight works properly.

Signed-off-by: Gabe Black <gabeblack@google.com>
Signed-off-by: Akshay Saraswat <akshay.s@samsung.com>
Acked-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
2013-04-01 14:02:08 +09:00
..
cpu_info.c Exynos: fix cpuinfo and cpu detecting 2012-07-07 14:07:25 +02:00
Makefile dm: wdt: Move s5p watchdog timer to drivers/watchdog/ 2012-11-15 21:08:19 +09:00
pwm.c Exynos: pwm: Fix two bugs in the exynos pwm configuration code 2013-04-01 14:02:08 +09:00
sromc.c S5P:SROM config code moved to s5p-common directory 2011-05-26 19:30:46 +09:00
timer.c Exynos: Avoid a divide by zero by specifying a non-zero period for pwm 4 2013-04-01 14:02:08 +09:00