author | Gabe Black <gabeblack@google.com> | |
Thu, 28 Mar 2013 04:32:19 +0000 (04:32 +0000) | ||
committer | Minkyu Kang <mk7.kang@samsung.com> | |
Mon, 1 Apr 2013 05:02:08 +0000 (14:02 +0900) | ||
commit | 34b5ee1f6a7d01560f31be37dca3b2eb62877c50 | |
tree | ceda23a29b4a2c85d731965280d8d8bb08432ebd | tree | snapshot (tar.xz tar.gz zip) |
parent | c059f274ade1a5f7d1f39927d8b31a41cba9034c | commit | diff |
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>
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>
arch/arm/cpu/armv7/s5p-common/timer.c | diff | blob | history |