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authorAndy Shevchenko <andriy.shevchenko@linux.intel.com>2017-03-28 12:36:38 +0300
committerSamuel Ortiz <sameo@linux.intel.com>2017-04-05 11:04:19 +0300
commita4a0eb783b112e45563dcf020388dfa186961010 (patch)
tree0dfedb11333c3d62a65acaa16a540f02b728d54d /drivers/nfc
parent182d4e860845bbf388f5f60d9e651611f3dbd351 (diff)
downloadlinux-a4a0eb783b112e45563dcf020388dfa186961010.tar.xz
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')
-rw-r--r--drivers/nfc/pn544/i2c.c21
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;
}