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NFC: fdp: Add GPIO ACPI mapping table

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In order to make GPIO ACPI library stricter prepare users of
gpiod_get_index() to correctly behave when there no mapping is
provided by firmware.

Here we add explicit mapping between _CRS GpioIo() resources and
their names used in the driver.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Andy Shevchenko 2017-06-19 13:08:51 +03:00 committed by Samuel Ortiz
parent 7b9fcda91e
commit a5d410949a
1 changed files with 12 additions and 4 deletions
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16
drivers/nfc/fdp/i2c.c
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@ -27,7 +27,6 @@
#define FDP_I2C_DRIVER_NAME "fdp_nci_i2c"
#define FDP_DP_POWER_GPIO_NAME "power"
#define FDP_DP_CLOCK_TYPE_NAME "clock-type"
#define FDP_DP_CLOCK_FREQ_NAME "clock-freq"
#define FDP_DP_FW_VSC_CFG_NAME "fw-vsc-cfg"
@ -281,6 +280,13 @@ static void fdp_nci_i2c_read_device_properties(struct device *dev,
*clock_type, *clock_freq, *fw_vsc_cfg != NULL ? "yes" : "no");
}
static const struct acpi_gpio_params power_gpios = { 0, 0, false };
static const struct acpi_gpio_mapping acpi_fdp_gpios[] = {
{ "power-gpios", &power_gpios, 1 },
{},
};
static int fdp_nci_i2c_probe(struct i2c_client *client)
{
struct fdp_i2c_phy *phy;
@ -321,10 +327,12 @@ static int fdp_nci_i2c_probe(struct i2c_client *client)
return r;
}
/* Requesting the power gpio */
phy->power_gpio = devm_gpiod_get(dev, FDP_DP_POWER_GPIO_NAME,
GPIOD_OUT_LOW);
r = devm_acpi_dev_add_driver_gpios(dev, acpi_fdp_gpios);
if (r)
dev_dbg(dev, "Unable to add GPIO mapping table\n");
/* Requesting the power gpio */
phy->power_gpio = devm_gpiod_get(dev, "power", GPIOD_OUT_LOW);
if (IS_ERR(phy->power_gpio)) {
nfc_err(dev, "Power GPIO request failed\n");
return PTR_ERR(phy->power_gpio);