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net: rfkill: gpio: convert to descriptor-based GPIO interface 

Convert to the safer gpiod_* family of API functions.

Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Heikki Krogerus 2013-11-26 12:05:46 +02:00 committed by Linus Walleij
parent 224feb33a6
commit 2111cad655
1 changed files with 34 additions and 43 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

77
net/rfkill/rfkill-gpio.c
View File

@ -25,15 +25,15 @@
#include <linux/clk.h>
#include <linux/slab.h>
#include <linux/acpi.h>
#include <linux/acpi_gpio.h>
#include <linux/gpio/consumer.h>
#include <linux/rfkill-gpio.h>
struct rfkill_gpio_data {
const char *name;
enum rfkill_type type;
int reset_gpio;
int shutdown_gpio;
struct gpio_desc *reset_gpio;
struct gpio_desc *shutdown_gpio;
struct rfkill *rfkill_dev;
char *reset_name;
@ -48,19 +48,15 @@ static int rfkill_gpio_set_power(void *data, bool blocked)
struct rfkill_gpio_data *rfkill = data;
if (blocked) {
if (gpio_is_valid(rfkill->shutdown_gpio))
gpio_set_value(rfkill->shutdown_gpio, 0);
if (gpio_is_valid(rfkill->reset_gpio))
gpio_set_value(rfkill->reset_gpio, 0);
gpiod_set_value(rfkill->shutdown_gpio, 0);
gpiod_set_value(rfkill->reset_gpio, 0);
if (!IS_ERR(rfkill->clk) && rfkill->clk_enabled)
clk_disable(rfkill->clk);
} else {
if (!IS_ERR(rfkill->clk) && !rfkill->clk_enabled)
clk_enable(rfkill->clk);
if (gpio_is_valid(rfkill->reset_gpio))
gpio_set_value(rfkill->reset_gpio, 1);
if (gpio_is_valid(rfkill->shutdown_gpio))
gpio_set_value(rfkill->shutdown_gpio, 1);
gpiod_set_value(rfkill->reset_gpio, 1);
gpiod_set_value(rfkill->shutdown_gpio, 1);
}
rfkill->clk_enabled = blocked;
@ -83,8 +79,6 @@ static int rfkill_gpio_acpi_probe(struct device *dev,
rfkill->name = dev_name(dev);
rfkill->type = (unsigned)id->driver_data;
rfkill->reset_gpio = acpi_get_gpio_by_index(dev, 0, NULL);
rfkill->shutdown_gpio = acpi_get_gpio_by_index(dev, 1, NULL);
return 0;
}
@ -94,8 +88,9 @@ static int rfkill_gpio_probe(struct platform_device *pdev)
struct rfkill_gpio_platform_data *pdata = pdev->dev.platform_data;
struct rfkill_gpio_data *rfkill;
const char *clk_name = NULL;
int ret = 0;
int len = 0;
struct gpio_desc *gpio;
int ret;
int len;
rfkill = devm_kzalloc(&pdev->dev, sizeof(*rfkill), GFP_KERNEL);
if (!rfkill)
@ -109,28 +104,10 @@ static int rfkill_gpio_probe(struct platform_device *pdev)
clk_name = pdata->power_clk_name;
rfkill->name = pdata->name;
rfkill->type = pdata->type;
rfkill->reset_gpio = pdata->reset_gpio;
rfkill->shutdown_gpio = pdata->shutdown_gpio;
} else {
return -ENODEV;
}
/* make sure at-least one of the GPIO is defined and that
* a name is specified for this instance */
if ((!gpio_is_valid(rfkill->reset_gpio) &&
!gpio_is_valid(rfkill->shutdown_gpio)) || !rfkill->name) {
pr_warn("%s: invalid platform data\n", __func__);
return -EINVAL;
}
if (pdata && pdata->gpio_runtime_setup) {
ret = pdata->gpio_runtime_setup(pdev);
if (ret) {
pr_warn("%s: can't set up gpio\n", __func__);
return ret;
}
}
len = strlen(rfkill->name);
rfkill->reset_name = devm_kzalloc(&pdev->dev, len + 7, GFP_KERNEL);
if (!rfkill->reset_name)
@ -145,20 +122,34 @@ static int rfkill_gpio_probe(struct platform_device *pdev)
rfkill->clk = devm_clk_get(&pdev->dev, clk_name);
if (gpio_is_valid(rfkill->reset_gpio)) {
ret = devm_gpio_request_one(&pdev->dev, rfkill->reset_gpio,
0, rfkill->reset_name);
if (ret) {
pr_warn("%s: failed to get reset gpio.\n", __func__);
gpio = devm_gpiod_get_index(&pdev->dev, rfkill->reset_name, 0);
if (!IS_ERR(gpio)) {
ret = gpiod_direction_output(gpio, 0);
if (ret)
return ret;
}
rfkill->reset_gpio = gpio;
}
if (gpio_is_valid(rfkill->shutdown_gpio)) {
ret = devm_gpio_request_one(&pdev->dev, rfkill->shutdown_gpio,
0, rfkill->shutdown_name);
gpio = devm_gpiod_get_index(&pdev->dev, rfkill->shutdown_name, 1);
if (!IS_ERR(gpio)) {
ret = gpiod_direction_output(gpio, 0);
if (ret)
return ret;
rfkill->shutdown_gpio = gpio;
}
/* Make sure at-least one of the GPIO is defined and that
* a name is specified for this instance
*/
if ((!rfkill->reset_gpio && !rfkill->shutdown_gpio) || !rfkill->name) {
dev_err(&pdev->dev, "invalid platform data\n");
return -EINVAL;
}
if (pdata && pdata->gpio_runtime_setup) {
ret = pdata->gpio_runtime_setup(pdev);
if (ret) {
pr_warn("%s: failed to get shutdown gpio.\n", __func__);
dev_err(&pdev->dev, "can't set up gpio\n");
return ret;
}
}