pwm: Add a driver for the STMPE PWM

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This adds a driver for the PWM block found in chips of the STMPE 24xx
series of multi-purpose I2C expanders. (I think STMPE means ST
Microelectronics Multi-Purpose Expander.) This PWM was designed in
accordance with Nokia specifications and is kind of weird and usually
just switched between max and zero duty cycle. However it is indeed a
PWM so it needs to live in the PWM subsystem.

This PWM is mostly used for white LED backlight.

Cc: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>

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Linus Walleij 2016-04-05 23:22:37 +02:00 • committed by Thierry Reding

parent 27e8c8f351

commit ef1f09eca7

3 changed files with 327 additions and 0 deletions

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7

drivers/pwm/Kconfig

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1

drivers/pwm/Makefile

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319

drivers/pwm/pwm-stmpe.c

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