Commit 69230cfa authored by Uwe Kleine-König's avatar Uwe Kleine-König Committed by Thierry Reding
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pwm: Autodetect default value for of_pwm_n_cells from device tree 



This allows to simplify all drivers that use three pwm-cells.
The only ugly side effect is that if a driver specified of_pwm_n_cells = 2
it suddenly supports device trees that use #pwm-cells = <3>. This however
isn't a bad thing because the driver doesn't need explicit support for
three cells as the core handles all the details. Also there is no such
in-tree driver.

Signed-off-by: default avatarUwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: default avatarThierry Reding <thierry.reding@gmail.com>
parent 5447e783

drivers/pwm/core.c

+7 −1
Original line number Diff line number Diff line
@@ -158,8 +158,14 @@ static void of_pwmchip_add(struct pwm_chip *chip) 
		return;



	if (!chip->of_xlate) {

		u32 pwm_cells;



		if (of_property_read_u32(chip->dev->of_node, "#pwm-cells",

					 &pwm_cells))

			pwm_cells = 2;



		chip->of_xlate = of_pwm_xlate_with_flags;

		chip->of_pwm_n_cells = 2;

		chip->of_pwm_n_cells = pwm_cells;

	}



	of_node_get(chip->dev->of_node);