diff options
| author |   Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2019-11-25 19:27:34 +0200 |
|---|---|---|
| committer | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2019-12-13 16:48:48 +0200 |
| commit | 21a06495d0e757b8a52774ce62e9cfdf07838971 (patch) | |
| tree | 9c102e0a12df776cf975c6a09acf707d02084c5d /drivers/pinctrl/intel | |
| parent | pinctrl: lynxpoint: Convert unsigned to unsigned int (diff) | |
| download | linux-dev-21a06495d0e757b8a52774ce62e9cfdf07838971.tar.xz linux-dev-21a06495d0e757b8a52774ce62e9cfdf07838971.zip | |
pinctrl: lynxpoint: Extract lp_gpio_acpi_use() for future use
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>
Diffstat (limited to 'drivers/pinctrl/intel')
| -rw-r--r-- | drivers/pinctrl/intel/pinctrl-lynxpoint.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/drivers/pinctrl/intel/pinctrl-lynxpoint.c b/drivers/pinctrl/intel/pinctrl-lynxpoint.c index 3c8241ed8bc2..d40360728140 100644 --- a/drivers/pinctrl/intel/pinctrl-lynxpoint.c +++ b/drivers/pinctrl/intel/pinctrl-lynxpoint.c @@ -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; } |