u-boot.git/drivers/pwm, branch v2022.04

exynos: pwm: Deal with a PWM at 100%

2021-11-09T02:57:22Z

At present the counter never hits the comparitor in this case. Add a special case. This ensures that the snow backlight works when at full brightness. Fixes: 76c2ff3e5fd video: backlight: fix pwm's duty cycle calculation Signed-off-by: Simon Glass Signed-off-by: Minkyu Kang

pwm: Add PWM driver for SAMA5D2

2021-10-12T12:18:39Z

Add support for the PWM found on the SAMA5D2 family of devices. Signed-off-by: Dan Sneddon

WS cleanup: remove SPACE(s) followed by TAB

2021-09-30T13:08:16Z

Signed-off-by: Wolfgang Denk

dm: define LOG_CATEGORY for all uclass

2021-07-06T16:38:03Z

Define LOG_CATEGORY for all uclass to allow filtering with log command. Signed-off-by: Patrick Delaunay Reviewed-by: Simon Glass

pwm: cros_ec: Rename "priv_auto_alloc_size" to "priv_auto"

2021-06-05T13:35:47Z

With commit 41575d8e4c33 ("dm: treewide: Rename auto_alloc_size members to be shorter") "priv_auto_alloc_size" was renamed to "priv_auto". This driver was sent to the mailing list before that change, merged after it, and still has the old form. Apply the rename here as well. Fixes: 1b9ee2882e6b ("pwm: Add a driver for Chrome OS EC PWM") Signed-off-by: Alper Nebi Yasak Reviewed-by: Simon Glass

pwm: sifive: make set_config() and set_enable() work properly

2021-05-14T08:25:42Z

The pwm_sifive_set_config() and pwm_sifive_set_enable() cannot work properly due to the wrong implementations. It will cause the u-boot PWM command to not work as expected. The bugs will be resolved in this patch. Signed-off-by: Vincent Chen Reviewed-by: Rick Chen

pwm: Add a driver for Chrome OS EC PWM

2021-04-10T14:08:39Z

This PWM is used in rk3399-gru-bob and rk3399-gru-kevin to control the display brightness. We can only change the duty cycle, so on set_config() we just try to match the duty cycle that dividing duty_ns by period_ns gives us. To disable, we set the duty cycle to zero while keeping the old value for when we want to re-enable it. The cros_ec_set_pwm_duty() function is taken from Depthcharge's cros_ec_set_bl_pwm_duty() but modified to use the generic pwm type. The driver itself is very loosely based on rk_pwm.c for the general pwm driver structure. The devicetree binding file is from Linux, before it was converted to YAML at 5df5a577a6b4 ("dt-bindings: pwm: Convert google,cros-ec-pwm.txt to YAML format") in their repo. Signed-off-by: Alper Nebi Yasak Reviewed-by: Simon Glass

video: backlight: Support PWMs without a known period_ns

2021-04-10T14:07:12Z

The PWM device provided by Chrome OS EC doesn't really support anything other than setting a relative duty cycle. To support it as a backlight, this patch makes the PWM period optional in the device tree and pretends the valid brightness range is its period_ns. Also adds a sandbox test for a PWM channel that has a fixed period, checking that the resulting duty_cycle matches on a set_config() even if the requested period_ns can't be set. Signed-off-by: Alper Nebi Yasak Reviewed-by: Simon Glass

rockchip: pwm: Fix default polarity

2021-04-10T09:54:59Z

In the code, the default polarity is set to positive/positive, which is neither normal polarity or inverted polarity. It's only the hardware default. This leads to booting linux with wrong polarity setting. Update the code to use PWM_DUTY_POSTIVE | PWM_INACTIVE_NEGATIVE by default instead. Signed-off-by: Arnaud Patard Tested-by: Peter Robinson

common: Drop asm/global_data.h from common header

2021-02-02T20:33:42Z

Move this out of the common header and include it only where needed. In a number of cases this requires adding "struct udevice;" to avoid adding another large header or in other cases replacing / adding missing header files that had been pulled in, very indirectly. Finally, we have a few cases where we did not need to include at all, so remove that include. Signed-off-by: Simon Glass Signed-off-by: Tom Rini