| Message ID | 20161205014308.1741-1-vz@mleia.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Mon, 2016-12-05 at 03:43 +0200, Vladimir Zapolskiy wrote: > NXP LPC32xx SoCs have two simple independent PWM controllers with a single > output each, in this case there is no need to specify PWM channel argument > on client side, one cell for setting PWM output frequency is sufficient. > > The change adds private of_xlate() handling of a single cell value given > with a PWM phandle on client side, the handling is taken from the PXA PWM > driver. > > Signed-off-by: Vladimir Zapolskiy <vz@mleia.com> > --- > drivers/pwm/pwm-lpc32xx.c | 16 ++++++++++++++++ > 1 file changed, 16 insertions(+) > Reviewed-by: Sylvain Lemieux <slemieux.tyco@gmail.com>
diff --git a/drivers/pwm/pwm-lpc32xx.c b/drivers/pwm/pwm-lpc32xx.c index a9b3cff..ce84181 100644 --- a/drivers/pwm/pwm-lpc32xx.c +++ b/drivers/pwm/pwm-lpc32xx.c @@ -92,6 +92,20 @@ static void lpc32xx_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm) clk_disable_unprepare(lpc32xx->clk); } +static struct pwm_device *lpc32xx_pwm_of_xlate(struct pwm_chip *pc, + const struct of_phandle_args *args) +{ + struct pwm_device *pwm; + + pwm = pwm_request_from_chip(pc, 0, NULL); + if (IS_ERR(pwm)) + return pwm; + + pwm->args.period = args->args[0]; + + return pwm; +} + static const struct pwm_ops lpc32xx_pwm_ops = { .config = lpc32xx_pwm_config, .enable = lpc32xx_pwm_enable, @@ -123,6 +137,8 @@ static int lpc32xx_pwm_probe(struct platform_device *pdev) lpc32xx->chip.ops = &lpc32xx_pwm_ops; lpc32xx->chip.npwm = 1; lpc32xx->chip.base = -1; + lpc32xx->chip.of_xlate = lpc32xx_pwm_of_xlate; + lpc32xx->chip.of_pwm_n_cells = 1; ret = pwmchip_add(&lpc32xx->chip); if (ret < 0) {
NXP LPC32xx SoCs have two simple independent PWM controllers with a single output each, in this case there is no need to specify PWM channel argument on client side, one cell for setting PWM output frequency is sufficient. The change adds private of_xlate() handling of a single cell value given with a PWM phandle on client side, the handling is taken from the PXA PWM driver. Signed-off-by: Vladimir Zapolskiy <vz@mleia.com> --- drivers/pwm/pwm-lpc32xx.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+)