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| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2017-03-28 12:36:38 +0300 |
|---|---|---|
| committer | Samuel Ortiz <sameo@linux.intel.com> | 2017-04-05 10:04:19 +0200 |
| commit | a4a0eb783b112e45563dcf020388dfa186961010 (patch) | |
| tree | 0dfedb11333c3d62a65acaa16a540f02b728d54d /drivers/nfc/pn544 | |
| parent | 182d4e860845bbf388f5f60d9e651611f3dbd351 (diff) | |
| download | linux-a4a0eb783b112e45563dcf020388dfa186961010.tar.gz linux-a4a0eb783b112e45563dcf020388dfa186961010.tar.bz2 linux-a4a0eb783b112e45563dcf020388dfa186961010.zip | |
NFC: pn544: Add GPIO ACPI mapping table
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>
Diffstat (limited to 'drivers/nfc/pn544')
| -rw-r--r-- | drivers/nfc/pn544/i2c.c | 21 |
1 files changed, 17 insertions, 4 deletions
diff --git a/drivers/nfc/pn544/i2c.c b/drivers/nfc/pn544/i2c.c index 327c33df5b22..6f2a9dff6b71 100644 --- a/drivers/nfc/pn544/i2c.c +++ b/drivers/nfc/pn544/i2c.c @@ -869,22 +869,34 @@ exit_state_wait_secure_write_answer: } } +static const struct acpi_gpio_params enable_gpios = { 1, 0, false }; +static const struct acpi_gpio_params firmware_gpios = { 2, 0, false }; + +static const struct acpi_gpio_mapping acpi_pn544_gpios[] = { + { "enable-gpios", &enable_gpios, 1 }, + { "firmware-gpios", &firmware_gpios, 1 }, + { }, +}; + static int pn544_hci_i2c_acpi_request_resources(struct i2c_client *client) { struct pn544_i2c_phy *phy = i2c_get_clientdata(client); struct device *dev = &client->dev; + int ret; + + ret = acpi_dev_add_driver_gpios(ACPI_COMPANION(dev), acpi_pn544_gpios); + if (ret) + return ret; /* Get EN GPIO from ACPI */ - phy->gpiod_en = devm_gpiod_get_index(dev, PN544_GPIO_NAME_EN, 1, - GPIOD_OUT_LOW); + phy->gpiod_en = devm_gpiod_get(dev, "enable", GPIOD_OUT_LOW); if (IS_ERR(phy->gpiod_en)) { nfc_err(dev, "Unable to get EN GPIO\n"); return PTR_ERR(phy->gpiod_en); } /* Get FW GPIO from ACPI */ - phy->gpiod_fw = devm_gpiod_get_index(dev, PN544_GPIO_NAME_FW, 2, - GPIOD_OUT_LOW); + phy->gpiod_fw = devm_gpiod_get(dev, "firmware", GPIOD_OUT_LOW); if (IS_ERR(phy->gpiod_fw)) { nfc_err(dev, "Unable to get FW GPIO\n"); return PTR_ERR(phy->gpiod_fw); @@ -996,6 +1008,7 @@ static int pn544_hci_i2c_remove(struct i2c_client *client) if (phy->powered) pn544_hci_i2c_disable(phy); + acpi_dev_remove_driver_gpios(ACPI_COMPANION(&client->dev)); return 0; } |