Messages in this thread | | | Date | Tue, 20 Nov 2012 12:54:11 +0100 | From | Peter Ujfalusi <> | Subject | Re: [PATCH v3 3/3] pwm: New driver to support PWM driven LEDs on TWL4030/6030 series of PMICs |
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On 11/20/2012 10:56 AM, Peter Ujfalusi wrote: > The driver supports the following LED outputs as generic PWM driver: > TWL4030 LEDA and LEDB (PWMA and PWMB) > TWL6030 Charging indicator LED (PWM LED) > > On TWL6030 when the PWM requested LED is configured to be controlled by SW. > In this case the user can enable/disable and set the duty period freely. > When the PWM has been freed, the LED driver is put back to HW control. > > Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com> > --- > drivers/pwm/Kconfig | 10 ++ > drivers/pwm/Makefile | 1 + > drivers/pwm/pwm-twl-led.c | 303 ++++++++++++++++++++++++++++++++++++++++++++++ > 3 files changed, 314 insertions(+) > create mode 100644 drivers/pwm/pwm-twl-led.c
...
> +static int twl4030_pwmled_config(struct pwm_chip *chip, struct pwm_device *pwm, > + int duty_ns, int period_ns) > +{ > + int duty_cycle = DIV_ROUND_UP(duty_ns * TWL4030_LED_MAX, period_ns); > + u8 pwm_config[2] = {1, 0}; > + int base, ret; > + > + /* > + * To configure the duty period: > + * On-cycle is set to 1 (the minimum allowed value) > + * The off time of 0 is not configurable, so the mapping is: > + * 0 -> off cycle = 2, > + * 1 -> off cycle = 2, > + * 2 -> off cycle = 3, > + * 125 - > off cycle 127, > + * 126 - > off cycle 1
Oh, I missed to save the updated comment before I commited the change. Can I just send and update patch instead of the whole series again?
> + * When on cycle == off cycle the PWM will be always on > + */
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