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extcon: gpio: Move platform data into state container

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This moves the platform data settings from the platform data
struct and into the state container, saving some unnecessary
references and simplifying things a bit.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
[cw00.choi: Add FIXME comment of extcon_id]
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
This commit is contained in:
Linus Walleij 2018-02-12 09:53:13 +01:00 committed by Chanwoo Choi
parent 66afdedf26
commit a62300d99f
1 changed files with 33 additions and 30 deletions
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63
drivers/extcon/extcon-gpio.c
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@ -29,7 +29,13 @@
#include <linux/workqueue.h> #include <linux/workqueue.h>
/** /**
* struct gpio_extcon_pdata - A simple GPIO-controlled extcon device. * struct gpio_extcon_data - A simple GPIO-controlled extcon device state container.
* @edev: Extcon device.
* @irq: Interrupt line for the external connector.
* @work: Work fired by the interrupt.
* @debounce_jiffies: Number of jiffies to wait for the GPIO to stabilize, from the debounce
* value.
* @id_gpiod: GPIO descriptor for this external connector.
* @extcon_id: The unique id of specific external connector. * @extcon_id: The unique id of specific external connector.
* @gpio: Corresponding GPIO. * @gpio: Corresponding GPIO.
* @gpio_active_low: Boolean describing whether gpio active state is 1 or 0 * @gpio_active_low: Boolean describing whether gpio active state is 1 or 0
@ -40,7 +46,12 @@
* @check_on_resume: Boolean describing whether to check the state of gpio * @check_on_resume: Boolean describing whether to check the state of gpio
* while resuming from sleep. * while resuming from sleep.
*/ */
struct gpio_extcon_pdata { struct gpio_extcon_data {
struct extcon_dev *edev;
int irq;
struct delayed_work work;
unsigned long debounce_jiffies;
struct gpio_desc *id_gpiod;
unsigned int extcon_id; unsigned int extcon_id;
unsigned gpio; unsigned gpio;
bool gpio_active_low; bool gpio_active_low;
@ -49,16 +60,6 @@ struct gpio_extcon_pdata {
bool check_on_resume; bool check_on_resume;
}; };
struct gpio_extcon_data {
struct extcon_dev *edev;
int irq;
struct delayed_work work;
unsigned long debounce_jiffies;
struct gpio_desc *id_gpiod;
struct gpio_extcon_pdata *pdata;
};
static void gpio_extcon_work(struct work_struct *work) static void gpio_extcon_work(struct work_struct *work)
{ {
int state; int state;
@ -67,10 +68,10 @@ static void gpio_extcon_work(struct work_struct *work)
work); work);
state = gpiod_get_value_cansleep(data->id_gpiod); state = gpiod_get_value_cansleep(data->id_gpiod);
if (data->pdata->gpio_active_low) if (data->gpio_active_low)
state = !state; state = !state;
extcon_set_state_sync(data->edev, data->pdata->extcon_id, state); extcon_set_state_sync(data->edev, data->extcon_id, state);
} }
static irqreturn_t gpio_irq_handler(int irq, void *dev_id) static irqreturn_t gpio_irq_handler(int irq, void *dev_id)
@ -84,24 +85,23 @@ static irqreturn_t gpio_irq_handler(int irq, void *dev_id)
static int gpio_extcon_init(struct device *dev, struct gpio_extcon_data *data) static int gpio_extcon_init(struct device *dev, struct gpio_extcon_data *data)
{ {
struct gpio_extcon_pdata *pdata = data->pdata;
int ret; int ret;
ret = devm_gpio_request_one(dev, pdata->gpio, GPIOF_DIR_IN, ret = devm_gpio_request_one(dev, data->gpio, GPIOF_DIR_IN,
dev_name(dev)); dev_name(dev));
if (ret < 0) if (ret < 0)
return ret; return ret;
data->id_gpiod = gpio_to_desc(pdata->gpio); data->id_gpiod = gpio_to_desc(data->gpio);
if (!data->id_gpiod) if (!data->id_gpiod)
return -EINVAL; return -EINVAL;
if (pdata->debounce) { if (data->debounce) {
ret = gpiod_set_debounce(data->id_gpiod, ret = gpiod_set_debounce(data->id_gpiod,
pdata->debounce * 1000); data->debounce * 1000);
if (ret < 0) if (ret < 0)
data->debounce_jiffies = data->debounce_jiffies =
msecs_to_jiffies(pdata->debounce); msecs_to_jiffies(data->debounce);
} }
data->irq = gpiod_to_irq(data->id_gpiod); data->irq = gpiod_to_irq(data->id_gpiod);
@ -113,20 +113,23 @@ static int gpio_extcon_init(struct device *dev, struct gpio_extcon_data *data)
static int gpio_extcon_probe(struct platform_device *pdev) static int gpio_extcon_probe(struct platform_device *pdev)
{ {
struct gpio_extcon_pdata *pdata = dev_get_platdata(&pdev->dev);
struct gpio_extcon_data *data; struct gpio_extcon_data *data;
int ret; int ret;
if (!pdata)
return -EBUSY;
if (!pdata->irq_flags || pdata->extcon_id > EXTCON_NONE)
return -EINVAL;
data = devm_kzalloc(&pdev->dev, sizeof(struct gpio_extcon_data), data = devm_kzalloc(&pdev->dev, sizeof(struct gpio_extcon_data),
GFP_KERNEL); GFP_KERNEL);
if (!data) if (!data)
return -ENOMEM; return -ENOMEM;
data->pdata = pdata;
/*
* FIXME: extcon_id represents the unique identifier of external
* connectors such as EXTCON_USB, EXTCON_DISP_HDMI and so on. extcon_id
* is necessary to register the extcon device. But, it's not yet
* developed to get the extcon id from device-tree or others.
* On later, it have to be solved.
*/
if (!data->irq_flags || data->extcon_id > EXTCON_NONE)
return -EINVAL;
/* Initialize the gpio */ /* Initialize the gpio */
ret = gpio_extcon_init(&pdev->dev, data); ret = gpio_extcon_init(&pdev->dev, data);
@ -134,7 +137,7 @@ static int gpio_extcon_probe(struct platform_device *pdev)
return ret; return ret;
/* Allocate the memory of extcon devie and register extcon device */ /* Allocate the memory of extcon devie and register extcon device */
data->edev = devm_extcon_dev_allocate(&pdev->dev, &pdata->extcon_id); data->edev = devm_extcon_dev_allocate(&pdev->dev, &data->extcon_id);
if (IS_ERR(data->edev)) { if (IS_ERR(data->edev)) {
dev_err(&pdev->dev, "failed to allocate extcon device\n"); dev_err(&pdev->dev, "failed to allocate extcon device\n");
return -ENOMEM; return -ENOMEM;
@ -151,7 +154,7 @@ static int gpio_extcon_probe(struct platform_device *pdev)
* is attached or detached. * is attached or detached.
*/ */
ret = devm_request_any_context_irq(&pdev->dev, data->irq, ret = devm_request_any_context_irq(&pdev->dev, data->irq,
gpio_irq_handler, pdata->irq_flags, gpio_irq_handler, data->irq_flags,
pdev->name, data); pdev->name, data);
if (ret < 0) if (ret < 0)
return ret; return ret;
@ -178,7 +181,7 @@ static int gpio_extcon_resume(struct device *dev)
struct gpio_extcon_data *data; struct gpio_extcon_data *data;
data = dev_get_drvdata(dev); data = dev_get_drvdata(dev);
if (data->pdata->check_on_resume) if (data->check_on_resume)
queue_delayed_work(system_power_efficient_wq, queue_delayed_work(system_power_efficient_wq,
&data->work, data->debounce_jiffies); &data->work, data->debounce_jiffies);