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pinctrl: lynxpoint: Extract lp_gpio_acpi_use() for future use

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We may need this function for other features in the pin control driver.

Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
This commit is contained in:
Andy Shevchenko 2019-11-25 19:27:34 +02:00
parent c35f463a96
commit 21a06495d0
1 changed files with 12 additions and 2 deletions
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14
drivers/pinctrl/intel/pinctrl-lynxpoint.c
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@ -98,18 +98,28 @@ static void __iomem *lp_gpio_reg(struct gpio_chip *chip, unsigned int offset,
return lg->regs + reg + reg_offset;
}
static bool lp_gpio_acpi_use(struct lp_gpio *lg, unsigned int pin)
{
void __iomem *acpi_use;
acpi_use = lp_gpio_reg(&lg->chip, pin, LP_ACPI_OWNED);
if (!acpi_use)
return true;
return !(ioread32(acpi_use) & BIT(pin % 32));
}
static int lp_gpio_request(struct gpio_chip *chip, unsigned int offset)
{
struct lp_gpio *lg = gpiochip_get_data(chip);
void __iomem *reg = lp_gpio_reg(chip, offset, LP_CONFIG1);
void __iomem *conf2 = lp_gpio_reg(chip, offset, LP_CONFIG2);
void __iomem *acpi_use = lp_gpio_reg(chip, offset, LP_ACPI_OWNED);
u32 value;
pm_runtime_get(lg->dev); /* should we put if failed */
/* Fail if BIOS reserved pin for ACPI use */
if (!(ioread32(acpi_use) & BIT(offset % 32))) {
if (lp_gpio_acpi_use(lg, offset)) {
dev_err(lg->dev, "gpio %d reserved for ACPI\n", offset);
return -EBUSY;
}