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NFC: st-nci: Covert to use GPIO descriptor 

Since we got rid of platform data, the driver may use GPIO descriptor
directly.

Looking deeply to the use of the GPIO pin it looks like it should be
a GPIO based reset control rather than custom GPIO handling. But this
is out of scope of the change.

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 13:08:54 +03:00 committed by Samuel Ortiz
parent 1af9fea6be
commit a89e68f118
2 changed files with 28 additions and 58 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

39
drivers/nfc/st-nci/i2c.c
View File

@ -19,13 +19,12 @@
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/gpio.h>
#include <linux/gpio/consumer.h>
#include <linux/of_gpio.h>
#include <linux/acpi.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/nfc.h>
#include <linux/of.h>
#include "st-nci.h"
@ -49,7 +48,7 @@ struct st_nci_i2c_phy {
bool irq_active;
unsigned int gpio_reset;
struct gpio_desc *gpiod_reset;
struct st_nci_se_status se_status;
};
@ -58,9 +57,9 @@ static int st_nci_i2c_enable(void *phy_id)
{
struct st_nci_i2c_phy *phy = phy_id;
gpio_set_value(phy->gpio_reset, 0);
gpiod_set_value(phy->gpiod_reset, 0);
usleep_range(10000, 15000);
gpio_set_value(phy->gpio_reset, 1);
gpiod_set_value(phy->gpiod_reset, 1);
usleep_range(80000, 85000);
if (phy->ndlc->powered == 0 && phy->irq_active == 0) {
@ -209,20 +208,17 @@ static struct nfc_phy_ops i2c_phy_ops = {
static int st_nci_i2c_acpi_request_resources(struct i2c_client *client)
{
struct st_nci_i2c_phy *phy = i2c_get_clientdata(client);
struct gpio_desc *gpiod_reset;
struct device *dev = &client->dev;
u8 tmp;
/* 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)) {
phy->gpiod_reset = devm_gpiod_get_index(dev, ST_NCI_GPIO_NAME_RESET,
1, GPIOD_OUT_HIGH);
if (IS_ERR(phy->gpiod_reset)) {
nfc_err(dev, "Unable to get RESET GPIO\n");
return -ENODEV;
}
phy->gpio_reset = desc_to_gpio(gpiod_reset);
phy->se_status.is_ese_present = false;
phy->se_status.is_uicc_present = false;
@ -242,31 +238,20 @@ static int st_nci_i2c_acpi_request_resources(struct i2c_client *client)
static int st_nci_i2c_of_request_resources(struct i2c_client *client)
{
struct st_nci_i2c_phy *phy = i2c_get_clientdata(client);
struct device *dev = &client->dev;
struct device_node *pp;
int gpio;
int r;
pp = client->dev.of_node;
if (!pp)
return -ENODEV;
/* Get GPIO from device tree */
gpio = of_get_named_gpio(pp, "reset-gpios", 0);
if (gpio < 0) {
nfc_err(&client->dev,
"Failed to retrieve reset-gpios from device tree\n");
return gpio;
phy->gpiod_reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
if (IS_ERR(phy->gpiod_reset)) {
nfc_err(dev, "Unable to get RESET GPIO\n");
return PTR_ERR(phy->gpiod_reset);
}
/* GPIO request and configuration */
r = devm_gpio_request_one(&client->dev, gpio,
GPIOF_OUT_INIT_HIGH, ST_NCI_GPIO_NAME_RESET);
if (r) {
nfc_err(&client->dev, "Failed to request reset pin\n");
return r;
}
phy->gpio_reset = gpio;
phy->se_status.is_ese_present =
of_property_read_bool(pp, "ese-present");
phy->se_status.is_uicc_present =

47
drivers/nfc/st-nci/spi.c
View File

@ -19,13 +19,12 @@
#include <linux/module.h>
#include <linux/spi/spi.h>
#include <linux/gpio.h>
#include <linux/gpio/consumer.h>
#include <linux/of_gpio.h>
#include <linux/acpi.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/nfc.h>
#include <linux/of.h>
#include <net/nfc/nci.h>
#include "st-nci.h"
@ -50,7 +49,7 @@ struct st_nci_spi_phy {
bool irq_active;
unsigned int gpio_reset;
struct gpio_desc *gpiod_reset;
struct st_nci_se_status se_status;
};
@ -59,9 +58,9 @@ static int st_nci_spi_enable(void *phy_id)
{
struct st_nci_spi_phy *phy = phy_id;
gpio_set_value(phy->gpio_reset, 0);
gpiod_set_value(phy->gpiod_reset, 0);
usleep_range(10000, 15000);
gpio_set_value(phy->gpio_reset, 1);
gpiod_set_value(phy->gpiod_reset, 1);
usleep_range(80000, 85000);
if (phy->ndlc->powered == 0 && phy->irq_active == 0) {
@ -224,20 +223,17 @@ static struct nfc_phy_ops spi_phy_ops = {
static int st_nci_spi_acpi_request_resources(struct spi_device *spi_dev)
{
struct st_nci_spi_phy *phy = spi_get_drvdata(spi_dev);
struct gpio_desc *gpiod_reset;
struct device *dev = &spi_dev->dev;
u8 tmp;
/* 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)) {
phy->gpiod_reset = devm_gpiod_get_index(dev, ST_NCI_GPIO_NAME_RESET,
1, GPIOD_OUT_HIGH);
if (IS_ERR(phy->gpiod_reset)) {
nfc_err(dev, "Unable to get RESET GPIO\n");
return -ENODEV;
return PTR_ERR(phy->gpiod_reset);
}
phy->gpio_reset = desc_to_gpio(gpiod_reset);
phy->se_status.is_ese_present = false;
phy->se_status.is_uicc_present = false;
@ -254,34 +250,23 @@ static int st_nci_spi_acpi_request_resources(struct spi_device *spi_dev)
return 0;
}
static int st_nci_spi_of_request_resources(struct spi_device *dev)
static int st_nci_spi_of_request_resources(struct spi_device *spi)
{
struct st_nci_spi_phy *phy = spi_get_drvdata(dev);
struct st_nci_spi_phy *phy = spi_get_drvdata(spi);
struct device *dev = &spi->dev;
struct device_node *pp;
int gpio;
int r;
pp = dev->dev.of_node;
pp = spi->dev.of_node;
if (!pp)
return -ENODEV;
/* Get GPIO from device tree */
gpio = of_get_named_gpio(pp, "reset-gpios", 0);
if (gpio < 0) {
nfc_err(&dev->dev,
"Failed to retrieve reset-gpios from device tree\n");
return gpio;
phy->gpiod_reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
if (IS_ERR(phy->gpiod_reset)) {
nfc_err(dev, "Unable to get RESET GPIO\n");
return PTR_ERR(phy->gpiod_reset);
}
/* GPIO request and configuration */
r = devm_gpio_request_one(&dev->dev, gpio,
GPIOF_OUT_INIT_HIGH, ST_NCI_GPIO_NAME_RESET);
if (r) {
nfc_err(&dev->dev, "Failed to request reset pin\n");
return r;
}
phy->gpio_reset = gpio;
phy->se_status.is_ese_present =
of_property_read_bool(pp, "ese-present");
phy->se_status.is_uicc_present =