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NFC: nxp-nci_i2c: Add support for enumerating through ACPI

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Signed-off-by: Oleg Zhurakivskyy <oleg.zhurakivskyy@intel.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Oleg Zhurakivskyy 2015-05-25 13:55:13 +03:00 committed by Samuel Ortiz
parent 6da8253bdd
commit 551e306905
1 changed files with 51 additions and 0 deletions
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51
drivers/nfc/nxp-nci/i2c.c
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@ -2,8 +2,10 @@
* I2C link layer for the NXP NCI driver
*
* Copyright (C) 2014 NXP Semiconductors All rights reserved.
* Copyright (C) 2012-2015 Intel Corporation. All rights reserved.
*
* Authors: Clément Perrochaud <clement.perrochaud@nxp.com>
* Authors: Oleg Zhurakivskyy <oleg.zhurakivskyy@intel.com>
*
* Derived from PN544 device driver:
* Copyright (C) 2012 Intel Corporation. All rights reserved.
@ -23,6 +25,7 @@
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/acpi.h>
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
@ -48,6 +51,7 @@ struct nxp_nci_i2c_phy {
unsigned int gpio_en;
unsigned int gpio_fw;
unsigned int gpio_irq;
int hard_fault; /*
* < 0 if hardware error occurred (e.g. i2c err)
@ -308,6 +312,37 @@ static int nxp_nci_i2c_parse_devtree(struct i2c_client *client)
#endif
static int nxp_nci_i2c_acpi_config(struct nxp_nci_i2c_phy *phy)
{
struct i2c_client *client = phy->i2c_dev;
struct gpio_desc *gpiod_en, *gpiod_fw, *gpiod_irq;
gpiod_en = devm_gpiod_get_index(&client->dev, NULL, 2);
gpiod_fw = devm_gpiod_get_index(&client->dev, NULL, 1);
gpiod_irq = devm_gpiod_get_index(&client->dev, NULL, 0);
if (IS_ERR(gpiod_en) || IS_ERR(gpiod_fw) || IS_ERR(gpiod_irq)) {
nfc_err(&client->dev, "No GPIOs\n");
return -EINVAL;
}
gpiod_direction_output(gpiod_en, 0);
gpiod_direction_output(gpiod_fw, 0);
gpiod_direction_input(gpiod_irq);
client->irq = gpiod_to_irq(gpiod_irq);
if (client->irq < 0) {
nfc_err(&client->dev, "No IRQ\n");
return -EINVAL;
}
phy->gpio_en = desc_to_gpio(gpiod_en);
phy->gpio_fw = desc_to_gpio(gpiod_fw);
phy->gpio_irq = desc_to_gpio(gpiod_irq);
return 0;
}
static int nxp_nci_i2c_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
@ -343,6 +378,11 @@ static int nxp_nci_i2c_probe(struct i2c_client *client,
phy->gpio_en = pdata->gpio_en;
phy->gpio_fw = pdata->gpio_fw;
client->irq = pdata->irq;
} else if (ACPI_HANDLE(&client->dev)) {
r = nxp_nci_i2c_acpi_config(phy);
if (r < 0)
goto probe_exit;
goto nci_probe;
} else {
nfc_err(&client->dev, "No platform data\n");
r = -EINVAL;
@ -359,6 +399,7 @@ static int nxp_nci_i2c_probe(struct i2c_client *client,
if (r < 0)
goto probe_exit;
nci_probe:
r = nxp_nci_probe(phy, &client->dev, &i2c_phy_ops,
NXP_NCI_I2C_MAX_PAYLOAD, &phy->ndev);
if (r < 0)
@ -397,10 +438,19 @@ static const struct of_device_id of_nxp_nci_i2c_match[] = {
};
MODULE_DEVICE_TABLE(of, of_nxp_nci_i2c_match);
#ifdef CONFIG_ACPI
static struct acpi_device_id acpi_id[] = {
{ "NXP7471" },
{ },
};
MODULE_DEVICE_TABLE(acpi, acpi_id);
#endif
static struct i2c_driver nxp_nci_i2c_driver = {
.driver = {
.name = NXP_NCI_I2C_DRIVER_NAME,
.owner = THIS_MODULE,
.acpi_match_table = ACPI_PTR(acpi_id),
.of_match_table = of_match_ptr(of_nxp_nci_i2c_match),
},
.probe = nxp_nci_i2c_probe,
@ -413,3 +463,4 @@ module_i2c_driver(nxp_nci_i2c_driver);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("I2C driver for NXP NCI NFC controllers");
MODULE_AUTHOR("Clément Perrochaud <clement.perrochaud@nxp.com>");
MODULE_AUTHOR("Oleg Zhurakivskyy <oleg.zhurakivskyy@intel.com>");