Commit Graph

6 Commits

Author SHA1 Message Date
David Wu
4ee6d51c5a pwm: rk_pwm: Make PWM driver to support all Rockchip Socs
This PWM driver can be used to support pwm functions
for on all Rockchip Socs.

The previous chips than RK3288 did not support polarity,
and register layout was different from the RK3288 PWM.

The RK3288 keep the current functions.

RK3328 and the chips after it, which can support hardware lock,
configure duty, period and polarity at next same period, to
prevent the intermediate temporary state.

Signed-off-by: David Wu <david.wu@rock-chips.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
2019-12-06 00:06:23 +08:00
Tom Rini
83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00
Kever Yang
06f4e36baf rockchip: pwm: add mask for config setting
Use mask to clear old setting before direct set the new config,
or else there it will mess up the config when it's not the same
with default value.

Fixes: 3851059 rockchip: Setup default PWM flags
Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Acked-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
2017-07-27 14:59:01 +02:00
eric.gao@rock-chips.com
e3ef41df48 rockchip: pwm: fix the register layout for the PWM controller
According to rk3288 spec, the pwm register order is:
    PWM_PWM0_CNT,
    PWM_PWM0_PERIOD_HPR,
    PWM_PWM0_DUTY_LPR,
    PWM_PWM0_CTRL
but the source code's order is:
  struct rk3288_pwm {
    u32 cnt;
    u32 duty_lpr;
    u32 period_hpr;
    u32 ctrl;
  };

So, correct it here. It is the same as RK3399.

Signed-off-by: Eric Gao <eric.gao@rock-chips.com>
Edited the commit message:
Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
2017-07-11 12:13:47 +02:00
Kever Yang
d840daf4c2 rockchip: rkpwm: fix the register sequence
Reference to kernel source code, rockchip pwm has three
type, we are using v2 for rk3288 and rk3399, so let's
update the register to sync with pwm_data_v2 in kernel.

Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Acked-by: Simon Glass <sjg@chromium.org>
2016-10-01 18:35:01 -06:00
Simon Glass
0e23fd81a5 pwm: rockchip: Add a PWM driver for Rockchip SoCs
Add a simple driver which implements the standard PWM uclass interface.

Signed-off-by: Simon Glass <sjg@chromium.org>
2016-01-21 20:42:36 -07:00