Commit 2e838e7f authored Mar 13, 2018 by Mike Looijmans Committed by Stephen Boyd Mar 19, 2018

clk: clk-gpio: Allow GPIO to sleep in set/get_parent



When changing or retrieving clock parents, the caller is in a sleepable
state (like prepare) so the GPIO operation need not be atomic. Replace
gpiod_{g|s}et_value with gpiod_{g|s}et_value_cansleep in the {g|s}et_parent
calls for the GPIO based clock mux.

This fixes a "slowpath" warning when the GPIO controller is an I2C expander
or something similar.

Signed-off-by: Mike Looijmans <mike.looijmans@topic.nl>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

parent 7928b2cb

drivers/clk/clk-gpio.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -73,14 +73,14 @@ static u8 clk_gpio_mux_get_parent(struct clk_hw *hw)
		{
		struct clk_gpio *clk = to_clk_gpio(hw);

		return gpiod_get_value(clk->gpiod);
		return gpiod_get_value_cansleep(clk->gpiod);
		}

		static int clk_gpio_mux_set_parent(struct clk_hw *hw, u8 index)
		{
		struct clk_gpio *clk = to_clk_gpio(hw);

		gpiod_set_value(clk->gpiod, index);
		gpiod_set_value_cansleep(clk->gpiod, index);

		return 0;
		}