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Subject[PATCH 4/4] clk: at91: usb: introduce num_parents in driver's structure
Date
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>
---
drivers/clk/at91/clk-usb.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/clk/at91/clk-usb.c b/drivers/clk/at91/clk-usb.c
index c0895c993cce..31d5c45e30d7 100644
--- a/drivers/clk/at91/clk-usb.c
+++ b/drivers/clk/at91/clk-usb.c
@@ -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);
--
2.7.4
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