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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>
This commit is contained in:
Claudiu Beznea 2020-01-17 13:36:49 +02:00 committed by Stephen Boyd
parent d7a83d67a1
commit 9962fb0d19
1 changed files with 3 additions and 1 deletions
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4
drivers/clk/at91/clk-usb.c
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@ -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);