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clk: at91: usb: introduce num_parents in driver's structure
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>
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1 changed files with 3 additions and 1 deletions
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@ -25,6 +25,7 @@ struct at91sam9x5_clk_usb {
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struct clk_hw hw;
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struct regmap *regmap;
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u32 usbs_mask;
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u8 num_parents;
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};
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#define to_at91sam9x5_clk_usb(hw) \
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@ -110,7 +111,7 @@ static int at91sam9x5_clk_usb_set_parent(struct clk_hw *hw, u8 index)
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{
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struct at91sam9x5_clk_usb *usb = to_at91sam9x5_clk_usb(hw);
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if (index > 1)
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if (index >= usb->num_parents)
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return -EINVAL;
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regmap_update_bits(usb->regmap, AT91_PMC_USB, usb->usbs_mask, index);
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@ -215,6 +216,7 @@ _at91sam9x5_clk_register_usb(struct regmap *regmap, const char *name,
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usb->hw.init = &init;
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usb->regmap = regmap;
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usb->usbs_mask = usbs_mask;
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usb->num_parents = num_parents;
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hw = &usb->hw;
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ret = clk_hw_register(NULL, &usb->hw);
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