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6 Commits

Author SHA1 Message Date
Fabrice Gasnier
cce4a833fc pwm: stm32-lp: Add power management support 
Add suspend/resume PM sleep ops. When going to low power, enforce the PWM
channel isn't active. Let the PWM consumers disable it during their own
suspend sequence. Only perform a check here, and handle the pinctrl states.
See [1].
[1] https://lkml.org/lkml/2019/2/5/770

Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
 2019-06-25 14:49:50 +02:00
Fabrice Gasnier
2c2059c0b8 pwm: stm32-lp: Remove useless loop in stm32_pwm_lp_remove() 
LPTimer has only one pwm channel (npwm = 1). Remove useless for loop
in remove routine.

Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
 2018-08-20 11:32:25 +02:00
Gerald Baeza
f6ea025f6e pwm: stm32: LPTimer: Use 3 cells ->of_xlate() 
STM32 Low-Power Timer supports generic 3 cells PWM to encode PWM number,
period and polarity.

Signed-off-by: Gerald Baeza <gerald.baeza@st.com>
Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
 2018-03-28 00:54:56 +02:00
Benjamin Gaignard
d7a131d3a4 pwm: stm32: Adopt SPDX identifier 
Add SPDX identifier to make it easier to determine the license of the
file.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@st.com>
Acked-by: Philippe Ombredanne <pombredanne@nexb.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
 2018-03-27 23:22:31 +02:00
Axel Lin
f83e2ae260 pwm: stm32-lp: Remove pwm_is_enabled() check before calling pwm_disable() 
The same checking is done by the implementation of pwm_disable().

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
 2017-11-15 11:02:06 +01:00
Fabrice Gasnier
e70a540b4e pwm: Add STM32 LPTimer PWM driver 
Add support for single PWM channel on Low-Power Timer, that can be
found on some STM32 platforms.

Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Acked-by: Thierry Reding <thierry.reding@gmail.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
 2017-09-04 14:49:09 +01:00