diff options
Diffstat (limited to 'drivers/pinctrl/pinctrl-cy8c95x0.c')
| -rw-r--r-- | drivers/pinctrl/pinctrl-cy8c95x0.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/drivers/pinctrl/pinctrl-cy8c95x0.c b/drivers/pinctrl/pinctrl-cy8c95x0.c index 18a9f5a8ab2d..a42790950182 100644 --- a/drivers/pinctrl/pinctrl-cy8c95x0.c +++ b/drivers/pinctrl/pinctrl-cy8c95x0.c @@ -7,7 +7,9 @@ * Author: Naresh Solanki <Naresh.Solanki@9elements.com> */ +#include <linux/acpi.h> #include <linux/bitmap.h> +#include <linux/dmi.h> #include <linux/gpio/driver.h> #include <linux/gpio/consumer.h> #include <linux/i2c.h> @@ -73,6 +75,46 @@ static const struct of_device_id cy8c95x0_dt_ids[] = { MODULE_DEVICE_TABLE(of, cy8c95x0_dt_ids); +static const struct acpi_gpio_params cy8c95x0_irq_gpios = { 0, 0, true }; + +static const struct acpi_gpio_mapping cy8c95x0_acpi_irq_gpios[] = { + { "irq-gpios", &cy8c95x0_irq_gpios, 1, ACPI_GPIO_QUIRK_ABSOLUTE_NUMBER }, + { } +}; + +static int cy8c95x0_acpi_get_irq(struct device *dev) +{ + int ret; + + ret = devm_acpi_dev_add_driver_gpios(dev, cy8c95x0_acpi_irq_gpios); + if (ret) + dev_warn(dev, "can't add GPIO ACPI mapping\n"); + + ret = acpi_dev_gpio_irq_get_by(ACPI_COMPANION(dev), "irq-gpios", 0); + if (ret < 0) + return ret; + + dev_info(dev, "ACPI interrupt quirk (IRQ %d)\n", ret); + return ret; +} + +static const struct dmi_system_id cy8c95x0_dmi_acpi_irq_info[] = { + { + /* + * On Intel Galileo Gen 1 board the IRQ pin is provided + * as an absolute number instead of being relative. + * Since first controller (gpio-sch.c) and second + * (gpio-dwapb.c) are at the fixed bases, we may safely + * refer to the number in the global space to get an IRQ + * out of it. + */ + .matches = { + DMI_EXACT_MATCH(DMI_BOARD_NAME, "Galileo"), + }, + }, + {} +}; + #define MAX_BANK 8 #define BANK_SZ 8 #define MAX_LINE (MAX_BANK * BANK_SZ) @@ -1309,6 +1351,12 @@ static int cy8c95x0_probe(struct i2c_client *client) bitmap_set(chip->shiftmask, 0, 20); mutex_init(&chip->i2c_lock); + if (dmi_first_match(cy8c95x0_dmi_acpi_irq_info)) { + ret = cy8c95x0_acpi_get_irq(&client->dev); + if (ret > 0) + client->irq = ret; + } + if (client->irq) { ret = cy8c95x0_irq_setup(chip, client->irq); if (ret) |