diff options
| author | Claudiu Beznea <claudiu.beznea@microchip.com> | 2020-01-17 13:36:49 +0200 |
|---|---|---|
| committer | Stephen Boyd <sboyd@kernel.org> | 2020-02-12 15:31:47 -0800 |
| commit | 9962fb0d19958215b5bc6b9279f824b55aabdec2 (patch) | |
| tree | 43cc3843227650c77daffd0c4dd417e613b47403 /drivers/clk/at91/clk-usb.c | |
| parent | d7a83d67a1694c42cc95fc0755d823f7ca3bfcfb (diff) | |
| download | lwn-9962fb0d19958215b5bc6b9279f824b55aabdec2.tar.gz lwn-9962fb0d19958215b5bc6b9279f824b55aabdec2.zip | |
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>
Diffstat (limited to 'drivers/clk/at91/clk-usb.c')
| -rw-r--r-- | drivers/clk/at91/clk-usb.c | 4 |
1 files changed, 3 insertions, 1 deletions
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); |