u-boot.git/drivers/pwm, branch master

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

2021-06-05T13:35:47+00:00

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

2021-05-14T08:25:42+00:00

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

2021-04-10T14:08:39+00:00

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

2021-04-10T14:07:12+00:00

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

2021-04-10T09:54:59+00:00

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

2021-02-02T20:33:42+00:00

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

dm: fix build errors generated by last merges

2021-01-15T18:12:38+00:00

Something was wrong in the merge process into the mainline.
Some added patches access driver structure fields and functions that
have been modified by previous patches.
The patch renames:
 - dev_get_platdata to dev_get_plat
 - dev_get_uclass_platdata to dev_get_uclass_plat
 - ofdata_to_platdata to of_to_plat
 - plat_data_alloc_size to plat_auto
 - priv_auto_alloc_size to priv_auto
 - video_uc_platdata to video_uc_plat

Signed-off-by: Dario Binacchi

pwm: ti: am33xx: add enhanced pwm driver

2021-01-12T05:28:05+00:00

Enhanced high resolution PWM module (EHRPWM) hardware can be used to
generate PWM output over 2 channels. This commit adds PWM driver support
for EHRPWM device present on AM33XX SOC.

The code is based on the drivers/pwm/pwm-tiehrpwm.c driver of the Linux
kernel version 5.9-rc7.
For DT binding details see:
- Documentation/devicetree/bindings/pwm/pwm-tiehrpwm.txt

Signed-off-by: Dario Binacchi

dm: core: Access device ofnode through functions

2021-01-05T19:24:41+00:00

At present ofnode is present in the device even if it is never used. With
of-platdata this field is not used, so can be removed. In preparation for
this, change the access to go through inline functions.

Signed-off-by: Simon Glass

dm: treewide: Rename ofdata_to_platdata() to of_to_plat()

2020-12-13T23:51:09+00:00

This name is far too long. Rename it to remove the 'data' bits. This makes
it consistent with the platdata->plat rename.

Signed-off-by: Simon Glass