clk: at91: usb: introduce num_parents in driver's structure (9962fb0d) · Commits · 戴 / test

SAM9X60 USB clock may have up to 3 parents. Save the number of parents in driver's data structure and validate against it when setting parent. Signed-off-by:

Claudiu Beznea <claudiu.beznea@microchip.com> Link: https://lkml.kernel.org/r/1579261009-4573-5-git-send-email-claudiu.beznea@microchip.com Acked-by:

Alexandre Belloni <alexandre.belloni@bootlin.com> Signed-off-by:

Stephen Boyd <sboyd@kernel.org>

drivers/clk/at91/clk-usb.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -25,6 +25,7 @@ struct at91sam9x5_clk_usb {
		struct clk_hw hw;
		struct regmap *regmap;
		u32 usbs_mask;
		u8 num_parents;
		};

		#define to_at91sam9x5_clk_usb(hw) \
		@@ -110,7 +111,7 @@ static int at91sam9x5_clk_usb_set_parent(struct clk_hw *hw, u8 index)
		{
		struct at91sam9x5_clk_usb *usb = to_at91sam9x5_clk_usb(hw);

		if (index > 1)
		if (index >= usb->num_parents)
		return -EINVAL;

		regmap_update_bits(usb->regmap, AT91_PMC_USB, usb->usbs_mask, index);
		@@ -215,6 +216,7 @@ _at91sam9x5_clk_register_usb(struct regmap regmap, const char name,
		usb->hw.init = &init;
		usb->regmap = regmap;
		usb->usbs_mask = usbs_mask;
		usb->num_parents = num_parents;

		hw = &usb->hw;
		ret = clk_hw_register(NULL, &usb->hw);

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