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-rw-r--r--drivers/extcon/extcon-gpio.c103
-rw-r--r--drivers/extcon/extcon-intel-cht-wc.c11
-rw-r--r--drivers/extcon/extcon-intel-int3496.c9
-rw-r--r--drivers/extcon/extcon.c44
4 files changed, 91 insertions, 76 deletions
diff --git a/drivers/extcon/extcon-gpio.c b/drivers/extcon/extcon-gpio.c
index ab770adcca7e..13ba3a6e81d5 100644
--- a/drivers/extcon/extcon-gpio.c
+++ b/drivers/extcon/extcon-gpio.c
@@ -18,8 +18,6 @@
*/
#include <linux/extcon-provider.h>
-#include <linux/extcon/extcon-gpio.h>
-#include <linux/gpio.h>
#include <linux/gpio/consumer.h>
#include <linux/init.h>
#include <linux/interrupt.h>
@@ -29,14 +27,30 @@
#include <linux/slab.h>
#include <linux/workqueue.h>
+/**
+ * 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.
+ * @gpiod: GPIO descriptor for this external connector.
+ * @extcon_id: The unique id of specific external connector.
+ * @debounce: Debounce time for GPIO IRQ in ms.
+ * @irq_flags: IRQ Flags (e.g., IRQF_TRIGGER_LOW).
+ * @check_on_resume: Boolean describing whether to check the state of gpio
+ * while resuming from sleep.
+ */
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;
+ struct gpio_desc *gpiod;
+ unsigned int extcon_id;
+ unsigned long debounce;
+ unsigned long irq_flags;
+ bool check_on_resume;
};
static void gpio_extcon_work(struct work_struct *work)
@@ -46,11 +60,8 @@ static void gpio_extcon_work(struct work_struct *work)
container_of(to_delayed_work(work), struct gpio_extcon_data,
work);
- state = gpiod_get_value_cansleep(data->id_gpiod);
- if (data->pdata->gpio_active_low)
- state = !state;
-
- extcon_set_state_sync(data->edev, data->pdata->extcon_id, state);
+ state = gpiod_get_value_cansleep(data->gpiod);
+ extcon_set_state_sync(data->edev, data->extcon_id, state);
}
static irqreturn_t gpio_irq_handler(int irq, void *dev_id)
@@ -62,65 +73,41 @@ static irqreturn_t gpio_irq_handler(int irq, void *dev_id)
return IRQ_HANDLED;
}
-static int gpio_extcon_init(struct device *dev, struct gpio_extcon_data *data)
-{
- struct gpio_extcon_pdata *pdata = data->pdata;
- int ret;
-
- ret = devm_gpio_request_one(dev, pdata->gpio, GPIOF_DIR_IN,
- dev_name(dev));
- if (ret < 0)
- return ret;
-
- data->id_gpiod = gpio_to_desc(pdata->gpio);
- if (!data->id_gpiod)
- return -EINVAL;
-
- if (pdata->debounce) {
- ret = gpiod_set_debounce(data->id_gpiod,
- pdata->debounce * 1000);
- if (ret < 0)
- data->debounce_jiffies =
- msecs_to_jiffies(pdata->debounce);
- }
-
- data->irq = gpiod_to_irq(data->id_gpiod);
- if (data->irq < 0)
- return data->irq;
-
- return 0;
-}
-
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 device *dev = &pdev->dev;
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),
- GFP_KERNEL);
+ data = devm_kzalloc(dev, sizeof(struct gpio_extcon_data), GFP_KERNEL);
if (!data)
return -ENOMEM;
- data->pdata = pdata;
- /* Initialize the gpio */
- ret = gpio_extcon_init(&pdev->dev, data);
- if (ret < 0)
- return ret;
+ /*
+ * 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;
+
+ data->gpiod = devm_gpiod_get(dev, "extcon", GPIOD_IN);
+ if (IS_ERR(data->gpiod))
+ return PTR_ERR(data->gpiod);
+ data->irq = gpiod_to_irq(data->gpiod);
+ if (data->irq <= 0)
+ return data->irq;
/* 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(dev, &data->extcon_id);
if (IS_ERR(data->edev)) {
- dev_err(&pdev->dev, "failed to allocate extcon device\n");
+ dev_err(dev, "failed to allocate extcon device\n");
return -ENOMEM;
}
- ret = devm_extcon_dev_register(&pdev->dev, data->edev);
+ ret = devm_extcon_dev_register(dev, data->edev);
if (ret < 0)
return ret;
@@ -130,8 +117,8 @@ static int gpio_extcon_probe(struct platform_device *pdev)
* Request the interrupt of gpio to detect whether external connector
* is attached or detached.
*/
- ret = devm_request_any_context_irq(&pdev->dev, data->irq,
- gpio_irq_handler, pdata->irq_flags,
+ ret = devm_request_any_context_irq(dev, data->irq,
+ gpio_irq_handler, data->irq_flags,
pdev->name, data);
if (ret < 0)
return ret;
@@ -158,7 +145,7 @@ static int gpio_extcon_resume(struct device *dev)
struct gpio_extcon_data *data;
data = dev_get_drvdata(dev);
- if (data->pdata->check_on_resume)
+ if (data->check_on_resume)
queue_delayed_work(system_power_efficient_wq,
&data->work, data->debounce_jiffies);
diff --git a/drivers/extcon/extcon-intel-cht-wc.c b/drivers/extcon/extcon-intel-cht-wc.c
index 7c4bc8c44c3f..b7e9ea377d70 100644
--- a/drivers/extcon/extcon-intel-cht-wc.c
+++ b/drivers/extcon/extcon-intel-cht-wc.c
@@ -66,6 +66,8 @@
#define CHT_WC_VBUS_GPIO_CTLO 0x6e2d
#define CHT_WC_VBUS_GPIO_CTLO_OUTPUT BIT(0)
+#define CHT_WC_VBUS_GPIO_CTLO_DRV_OD BIT(4)
+#define CHT_WC_VBUS_GPIO_CTLO_DIR_OUT BIT(5)
enum cht_wc_usb_id {
USB_ID_OTG,
@@ -183,14 +185,15 @@ static void cht_wc_extcon_set_5v_boost(struct cht_wc_extcon_data *ext,
{
int ret, val;
- val = enable ? CHT_WC_VBUS_GPIO_CTLO_OUTPUT : 0;
-
/*
* The 5V boost converter is enabled through a gpio on the PMIC, since
* there currently is no gpio driver we access the gpio reg directly.
*/
- ret = regmap_update_bits(ext->regmap, CHT_WC_VBUS_GPIO_CTLO,
- CHT_WC_VBUS_GPIO_CTLO_OUTPUT, val);
+ val = CHT_WC_VBUS_GPIO_CTLO_DRV_OD | CHT_WC_VBUS_GPIO_CTLO_DIR_OUT;
+ if (enable)
+ val |= CHT_WC_VBUS_GPIO_CTLO_OUTPUT;
+
+ ret = regmap_write(ext->regmap, CHT_WC_VBUS_GPIO_CTLO, val);
if (ret)
dev_err(ext->dev, "Error writing Vbus GPIO CTLO: %d\n", ret);
}
diff --git a/drivers/extcon/extcon-intel-int3496.c b/drivers/extcon/extcon-intel-int3496.c
index 191e99f06a9a..acaccb128fc4 100644
--- a/drivers/extcon/extcon-intel-int3496.c
+++ b/drivers/extcon/extcon-intel-int3496.c
@@ -50,7 +50,11 @@ static const struct acpi_gpio_params vbus_gpios = { INT3496_GPIO_VBUS_EN, 0, fal
static const struct acpi_gpio_params mux_gpios = { INT3496_GPIO_USB_MUX, 0, false };
static const struct acpi_gpio_mapping acpi_int3496_default_gpios[] = {
- { "id-gpios", &id_gpios, 1 },
+ /*
+ * Some platforms have a bug in ACPI GPIO description making IRQ
+ * GPIO to be output only. Ask the GPIO core to ignore this limit.
+ */
+ { "id-gpios", &id_gpios, 1, ACPI_GPIO_QUIRK_NO_IO_RESTRICTION },
{ "vbus-gpios", &vbus_gpios, 1 },
{ "mux-gpios", &mux_gpios, 1 },
{ },
@@ -112,9 +116,6 @@ static int int3496_probe(struct platform_device *pdev)
ret = PTR_ERR(data->gpio_usb_id);
dev_err(dev, "can't request USB ID GPIO: %d\n", ret);
return ret;
- } else if (gpiod_get_direction(data->gpio_usb_id) != GPIOF_DIR_IN) {
- dev_warn(dev, FW_BUG "USB ID GPIO not in input mode, fixing\n");
- gpiod_direction_input(data->gpio_usb_id);
}
data->usb_id_irq = gpiod_to_irq(data->gpio_usb_id);
diff --git a/drivers/extcon/extcon.c b/drivers/extcon/extcon.c
index cb38c2747684..8bff5fd18185 100644
--- a/drivers/extcon/extcon.c
+++ b/drivers/extcon/extcon.c
@@ -1336,6 +1336,28 @@ void extcon_dev_unregister(struct extcon_dev *edev)
EXPORT_SYMBOL_GPL(extcon_dev_unregister);
#ifdef CONFIG_OF
+
+/*
+ * extcon_find_edev_by_node - Find the extcon device from devicetree.
+ * @node : OF node identifying edev
+ *
+ * Return the pointer of extcon device if success or ERR_PTR(err) if fail.
+ */
+struct extcon_dev *extcon_find_edev_by_node(struct device_node *node)
+{
+ struct extcon_dev *edev;
+
+ mutex_lock(&extcon_dev_list_lock);
+ list_for_each_entry(edev, &extcon_dev_list, entry)
+ if (edev->dev.parent && edev->dev.parent->of_node == node)
+ goto out;
+ edev = ERR_PTR(-EPROBE_DEFER);
+out:
+ mutex_unlock(&extcon_dev_list_lock);
+
+ return edev;
+}
+
/*
* extcon_get_edev_by_phandle - Get the extcon device from devicetree.
* @dev : the instance to the given device
@@ -1363,25 +1385,27 @@ struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev, int index)
return ERR_PTR(-ENODEV);
}
- mutex_lock(&extcon_dev_list_lock);
- list_for_each_entry(edev, &extcon_dev_list, entry) {
- if (edev->dev.parent && edev->dev.parent->of_node == node) {
- mutex_unlock(&extcon_dev_list_lock);
- of_node_put(node);
- return edev;
- }
- }
- mutex_unlock(&extcon_dev_list_lock);
+ edev = extcon_find_edev_by_node(node);
of_node_put(node);
- return ERR_PTR(-EPROBE_DEFER);
+ return edev;
}
+
#else
+
+struct extcon_dev *extcon_find_edev_by_node(struct device_node *node)
+{
+ return ERR_PTR(-ENOSYS);
+}
+
struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev, int index)
{
return ERR_PTR(-ENOSYS);
}
+
#endif /* CONFIG_OF */
+
+EXPORT_SYMBOL_GPL(extcon_find_edev_by_node);
EXPORT_SYMBOL_GPL(extcon_get_edev_by_phandle);
/**
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-27 17:28:53 +0300