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path: root/drivers/nfc/st-nci/i2c.c
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Diffstat (limited to 'drivers/nfc/st-nci/i2c.c')
-rw-r--r--drivers/nfc/st-nci/i2c.c80
1 files changed, 63 insertions, 17 deletions
diff --git a/drivers/nfc/st-nci/i2c.c b/drivers/nfc/st-nci/i2c.c
index 15e3ce2d274c..8a56b5c6e4c4 100644
--- a/drivers/nfc/st-nci/i2c.c
+++ b/drivers/nfc/st-nci/i2c.c
@@ -20,8 +20,10 @@
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
#include <linux/of_irq.h>
#include <linux/of_gpio.h>
+#include <linux/acpi.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/nfc.h>
@@ -40,11 +42,7 @@
#define ST_NCI_I2C_DRIVER_NAME "st_nci_i2c"
-static struct i2c_device_id st_nci_i2c_id_table[] = {
- {ST_NCI_DRIVER_NAME, 0},
- {}
-};
-MODULE_DEVICE_TABLE(i2c, st_nci_i2c_id_table);
+#define ST_NCI_GPIO_NAME_RESET "clf_reset"
struct st_nci_i2c_phy {
struct i2c_client *i2c_dev;
@@ -210,7 +208,43 @@ static struct nfc_phy_ops i2c_phy_ops = {
.disable = st_nci_i2c_disable,
};
-#ifdef CONFIG_OF
+static int st_nci_i2c_acpi_request_resources(struct i2c_client *client)
+{
+ struct st_nci_i2c_phy *phy = i2c_get_clientdata(client);
+ const struct acpi_device_id *id;
+ struct gpio_desc *gpiod_reset;
+ struct device *dev;
+
+ if (!client)
+ return -EINVAL;
+
+ dev = &client->dev;
+
+ /* Match the struct device against a given list of ACPI IDs */
+ id = acpi_match_device(dev->driver->acpi_match_table, dev);
+ if (!id)
+ return -ENODEV;
+
+ /* Get RESET GPIO from ACPI */
+ gpiod_reset = devm_gpiod_get_index(dev, ST_NCI_GPIO_NAME_RESET, 1,
+ GPIOD_OUT_HIGH);
+ if (IS_ERR(gpiod_reset)) {
+ nfc_err(dev, "Unable to get RESET GPIO\n");
+ return -ENODEV;
+ }
+
+ phy->gpio_reset = desc_to_gpio(gpiod_reset);
+
+ phy->irq_polarity = irq_get_trigger_type(client->irq);
+
+ phy->se_status.is_ese_present =
+ device_property_present(dev, "ese-present");
+ phy->se_status.is_uicc_present =
+ device_property_present(dev, "uicc-present");
+
+ return 0;
+}
+
static int st_nci_i2c_of_request_resources(struct i2c_client *client)
{
struct st_nci_i2c_phy *phy = i2c_get_clientdata(client);
@@ -232,7 +266,7 @@ static int st_nci_i2c_of_request_resources(struct i2c_client *client)
/* GPIO request and configuration */
r = devm_gpio_request_one(&client->dev, gpio,
- GPIOF_OUT_INIT_HIGH, "clf_reset");
+ GPIOF_OUT_INIT_HIGH, ST_NCI_GPIO_NAME_RESET);
if (r) {
nfc_err(&client->dev, "Failed to request reset pin\n");
return r;
@@ -248,12 +282,6 @@ static int st_nci_i2c_of_request_resources(struct i2c_client *client)
return 0;
}
-#else
-static int st_nci_i2c_of_request_resources(struct i2c_client *client)
-{
- return -ENODEV;
-}
-#endif
static int st_nci_i2c_request_resources(struct i2c_client *client)
{
@@ -272,7 +300,8 @@ static int st_nci_i2c_request_resources(struct i2c_client *client)
phy->irq_polarity = pdata->irq_polarity;
r = devm_gpio_request_one(&client->dev,
- phy->gpio_reset, GPIOF_OUT_INIT_HIGH, "clf_reset");
+ phy->gpio_reset, GPIOF_OUT_INIT_HIGH,
+ ST_NCI_GPIO_NAME_RESET);
if (r) {
pr_err("%s : reset gpio_request failed\n", __FILE__);
return r;
@@ -322,6 +351,12 @@ static int st_nci_i2c_probe(struct i2c_client *client,
"Cannot get platform resources\n");
return r;
}
+ } else if (ACPI_HANDLE(&client->dev)) {
+ r = st_nci_i2c_acpi_request_resources(client);
+ if (r) {
+ nfc_err(&client->dev, "Cannot get ACPI data\n");
+ return r;
+ }
} else {
nfc_err(&client->dev,
"st_nci platform resources not available\n");
@@ -358,7 +393,19 @@ static int st_nci_i2c_remove(struct i2c_client *client)
return 0;
}
-#ifdef CONFIG_OF
+static struct i2c_device_id st_nci_i2c_id_table[] = {
+ {ST_NCI_DRIVER_NAME, 0},
+ {}
+};
+MODULE_DEVICE_TABLE(i2c, st_nci_i2c_id_table);
+
+static const struct acpi_device_id st_nci_i2c_acpi_match[] = {
+ {"SMO2101"},
+ {"SMO2102"},
+ {}
+};
+MODULE_DEVICE_TABLE(acpi, st_nci_i2c_acpi_match);
+
static const struct of_device_id of_st_nci_i2c_match[] = {
{ .compatible = "st,st21nfcb-i2c", },
{ .compatible = "st,st21nfcb_i2c", },
@@ -366,19 +413,18 @@ static const struct of_device_id of_st_nci_i2c_match[] = {
{}
};
MODULE_DEVICE_TABLE(of, of_st_nci_i2c_match);
-#endif
static struct i2c_driver st_nci_i2c_driver = {
.driver = {
.owner = THIS_MODULE,
.name = ST_NCI_I2C_DRIVER_NAME,
.of_match_table = of_match_ptr(of_st_nci_i2c_match),
+ .acpi_match_table = ACPI_PTR(st_nci_i2c_acpi_match),
},
.probe = st_nci_i2c_probe,
.id_table = st_nci_i2c_id_table,
.remove = st_nci_i2c_remove,
};
-
module_i2c_driver(st_nci_i2c_driver);
MODULE_LICENSE("GPL");