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gpio: rockchip: Prevent underflow unsigned variables.

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Signed-off-by: Ye Zhang <ye.zhang@rock-chips.com>
Change-Id: I2910fe7c57683bbd175cbc4b28584ff84f037d07
This commit is contained in:
Ye Zhang
2024-08-09 10:05:21 +08:00
parent dc86ccfba0
commit 63cfe63d81
1 changed files with 3 additions and 4 deletions
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7
drivers/gpio/gpio-rockchip.c
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@@ -209,11 +209,12 @@ static int rockchip_gpio_set_debounce(struct gpio_chip *gc,
unsigned int cur_div_reg;
u64 div;
if (bank->gpio_type >= GPIO_TYPE_V2 && !IS_ERR(bank->db_clk)) {
div_debounce_support = true;
div_debounce_support = (bank->gpio_type >= GPIO_TYPE_V2) && !IS_ERR(bank->db_clk);
if (debounce && div_debounce_support) {
freq = clk_get_rate(bank->db_clk);
if (!freq)
return -EINVAL;
div = (u64)(GENMASK(23, 0) + 1) * 1000000;
if (bank->gpio_type == GPIO_TYPE_V2)
max_debounce = DIV_ROUND_CLOSEST_ULL(div, freq);
@@ -227,8 +228,6 @@ static int rockchip_gpio_set_debounce(struct gpio_chip *gc,
div_reg = DIV_ROUND_CLOSEST_ULL(div, USEC_PER_SEC) - 1;
else
div_reg = DIV_ROUND_CLOSEST_ULL(div, USEC_PER_SEC / 2) - 1;
} else {
div_debounce_support = false;
}
raw_spin_lock_irqsave(&bank->slock, flags);