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-rw-r--r--Documentation/devicetree/bindings/extcon/extcon-palmas.txt5
-rw-r--r--drivers/extcon/extcon-palmas.c129
-rw-r--r--drivers/extcon/extcon-usb-gpio.c1
-rw-r--r--include/linux/mfd/palmas.h7
4 files changed, 126 insertions, 16 deletions
diff --git a/Documentation/devicetree/bindings/extcon/extcon-palmas.txt b/Documentation/devicetree/bindings/extcon/extcon-palmas.txt
index 45414bbcd945..f61d5af44a27 100644
--- a/Documentation/devicetree/bindings/extcon/extcon-palmas.txt
+++ b/Documentation/devicetree/bindings/extcon/extcon-palmas.txt
@@ -10,8 +10,11 @@ Required Properties:
Optional Properties:
- ti,wakeup : To enable the wakeup comparator in probe
- - ti,enable-id-detection: Perform ID detection.
+ - ti,enable-id-detection: Perform ID detection. If id-gpio is specified
+ it performs id-detection using GPIO else using OTG core.
- ti,enable-vbus-detection: Perform VBUS detection.
+ - id-gpio: gpio for GPIO ID detection. See gpio binding.
+ - debounce-delay-ms: debounce delay for GPIO ID pin in milliseconds.
palmas-usb {
compatible = "ti,twl6035-usb", "ti,palmas-usb";
diff --git a/drivers/extcon/extcon-palmas.c b/drivers/extcon/extcon-palmas.c
index 8933e7e0d9da..662e91778cb0 100644
--- a/drivers/extcon/extcon-palmas.c
+++ b/drivers/extcon/extcon-palmas.c
@@ -28,6 +28,10 @@
#include <linux/mfd/palmas.h>
#include <linux/of.h>
#include <linux/of_platform.h>
+#include <linux/of_gpio.h>
+#include <linux/workqueue.h>
+
+#define USB_GPIO_DEBOUNCE_MS 20 /* ms */
static const unsigned int palmas_extcon_cable[] = {
EXTCON_USB,
@@ -118,19 +122,54 @@ static irqreturn_t palmas_id_irq_handler(int irq, void *_palmas_usb)
return IRQ_HANDLED;
}
+static void palmas_gpio_id_detect(struct work_struct *work)
+{
+ int id;
+ struct palmas_usb *palmas_usb = container_of(to_delayed_work(work),
+ struct palmas_usb,
+ wq_detectid);
+ struct extcon_dev *edev = palmas_usb->edev;
+
+ if (!palmas_usb->id_gpiod)
+ return;
+
+ id = gpiod_get_value_cansleep(palmas_usb->id_gpiod);
+
+ if (id) {
+ extcon_set_cable_state_(edev, EXTCON_USB_HOST, false);
+ dev_info(palmas_usb->dev, "USB-HOST cable is detached\n");
+ } else {
+ extcon_set_cable_state_(edev, EXTCON_USB_HOST, true);
+ dev_info(palmas_usb->dev, "USB-HOST cable is attached\n");
+ }
+}
+
+static irqreturn_t palmas_gpio_id_irq_handler(int irq, void *_palmas_usb)
+{
+ struct palmas_usb *palmas_usb = _palmas_usb;
+
+ queue_delayed_work(system_power_efficient_wq, &palmas_usb->wq_detectid,
+ palmas_usb->sw_debounce_jiffies);
+
+ return IRQ_HANDLED;
+}
+
static void palmas_enable_irq(struct palmas_usb *palmas_usb)
{
palmas_write(palmas_usb->palmas, PALMAS_USB_OTG_BASE,
PALMAS_USB_VBUS_CTRL_SET,
PALMAS_USB_VBUS_CTRL_SET_VBUS_ACT_COMP);
- palmas_write(palmas_usb->palmas, PALMAS_USB_OTG_BASE,
- PALMAS_USB_ID_CTRL_SET, PALMAS_USB_ID_CTRL_SET_ID_ACT_COMP);
+ if (palmas_usb->enable_id_detection) {
+ palmas_write(palmas_usb->palmas, PALMAS_USB_OTG_BASE,
+ PALMAS_USB_ID_CTRL_SET,
+ PALMAS_USB_ID_CTRL_SET_ID_ACT_COMP);
- palmas_write(palmas_usb->palmas, PALMAS_USB_OTG_BASE,
- PALMAS_USB_ID_INT_EN_HI_SET,
- PALMAS_USB_ID_INT_EN_HI_SET_ID_GND |
- PALMAS_USB_ID_INT_EN_HI_SET_ID_FLOAT);
+ palmas_write(palmas_usb->palmas, PALMAS_USB_OTG_BASE,
+ PALMAS_USB_ID_INT_EN_HI_SET,
+ PALMAS_USB_ID_INT_EN_HI_SET_ID_GND |
+ PALMAS_USB_ID_INT_EN_HI_SET_ID_FLOAT);
+ }
if (palmas_usb->enable_vbus_detection)
palmas_vbus_irq_handler(palmas_usb->vbus_irq, palmas_usb);
@@ -169,20 +208,36 @@ static int palmas_usb_probe(struct platform_device *pdev)
palmas_usb->wakeup = pdata->wakeup;
}
+ palmas_usb->id_gpiod = devm_gpiod_get_optional(&pdev->dev, "id");
+ if (IS_ERR(palmas_usb->id_gpiod)) {
+ dev_err(&pdev->dev, "failed to get id gpio\n");
+ return PTR_ERR(palmas_usb->id_gpiod);
+ }
+
+ if (palmas_usb->enable_id_detection && palmas_usb->id_gpiod) {
+ palmas_usb->enable_id_detection = false;
+ palmas_usb->enable_gpio_id_detection = true;
+ }
+
+ if (palmas_usb->enable_gpio_id_detection) {
+ u32 debounce;
+
+ if (of_property_read_u32(node, "debounce-delay-ms", &debounce))
+ debounce = USB_GPIO_DEBOUNCE_MS;
+
+ status = gpiod_set_debounce(palmas_usb->id_gpiod,
+ debounce * 1000);
+ if (status < 0)
+ palmas_usb->sw_debounce_jiffies = msecs_to_jiffies(debounce);
+ }
+
+ INIT_DELAYED_WORK(&palmas_usb->wq_detectid, palmas_gpio_id_detect);
+
palmas->usb = palmas_usb;
palmas_usb->palmas = palmas;
palmas_usb->dev = &pdev->dev;
- palmas_usb->id_otg_irq = regmap_irq_get_virq(palmas->irq_data,
- PALMAS_ID_OTG_IRQ);
- palmas_usb->id_irq = regmap_irq_get_virq(palmas->irq_data,
- PALMAS_ID_IRQ);
- palmas_usb->vbus_otg_irq = regmap_irq_get_virq(palmas->irq_data,
- PALMAS_VBUS_OTG_IRQ);
- palmas_usb->vbus_irq = regmap_irq_get_virq(palmas->irq_data,
- PALMAS_VBUS_IRQ);
-
palmas_usb_wakeup(palmas, palmas_usb->wakeup);
platform_set_drvdata(pdev, palmas_usb);
@@ -201,6 +256,10 @@ static int palmas_usb_probe(struct platform_device *pdev)
}
if (palmas_usb->enable_id_detection) {
+ palmas_usb->id_otg_irq = regmap_irq_get_virq(palmas->irq_data,
+ PALMAS_ID_OTG_IRQ);
+ palmas_usb->id_irq = regmap_irq_get_virq(palmas->irq_data,
+ PALMAS_ID_IRQ);
status = devm_request_threaded_irq(palmas_usb->dev,
palmas_usb->id_irq,
NULL, palmas_id_irq_handler,
@@ -212,9 +271,33 @@ static int palmas_usb_probe(struct platform_device *pdev)
palmas_usb->id_irq, status);
return status;
}
+ } else if (palmas_usb->enable_gpio_id_detection) {
+ palmas_usb->gpio_id_irq = gpiod_to_irq(palmas_usb->id_gpiod);
+ if (palmas_usb->gpio_id_irq < 0) {
+ dev_err(&pdev->dev, "failed to get id irq\n");
+ return palmas_usb->gpio_id_irq;
+ }
+ status = devm_request_threaded_irq(&pdev->dev,
+ palmas_usb->gpio_id_irq,
+ NULL,
+ palmas_gpio_id_irq_handler,
+ IRQF_TRIGGER_RISING |
+ IRQF_TRIGGER_FALLING |
+ IRQF_ONESHOT,
+ "palmas_usb_id",
+ palmas_usb);
+ if (status < 0) {
+ dev_err(&pdev->dev,
+ "failed to request handler for id irq\n");
+ return status;
+ }
}
if (palmas_usb->enable_vbus_detection) {
+ palmas_usb->vbus_otg_irq = regmap_irq_get_virq(palmas->irq_data,
+ PALMAS_VBUS_OTG_IRQ);
+ palmas_usb->vbus_irq = regmap_irq_get_virq(palmas->irq_data,
+ PALMAS_VBUS_IRQ);
status = devm_request_threaded_irq(palmas_usb->dev,
palmas_usb->vbus_irq, NULL,
palmas_vbus_irq_handler,
@@ -229,10 +312,21 @@ static int palmas_usb_probe(struct platform_device *pdev)
}
palmas_enable_irq(palmas_usb);
+ /* perform initial detection */
+ palmas_gpio_id_detect(&palmas_usb->wq_detectid.work);
device_set_wakeup_capable(&pdev->dev, true);
return 0;
}
+static int palmas_usb_remove(struct platform_device *pdev)
+{
+ struct palmas_usb *palmas_usb = platform_get_drvdata(pdev);
+
+ cancel_delayed_work_sync(&palmas_usb->wq_detectid);
+
+ return 0;
+}
+
#ifdef CONFIG_PM_SLEEP
static int palmas_usb_suspend(struct device *dev)
{
@@ -243,6 +337,8 @@ static int palmas_usb_suspend(struct device *dev)
enable_irq_wake(palmas_usb->vbus_irq);
if (palmas_usb->enable_id_detection)
enable_irq_wake(palmas_usb->id_irq);
+ if (palmas_usb->enable_gpio_id_detection)
+ enable_irq_wake(palmas_usb->gpio_id_irq);
}
return 0;
}
@@ -256,6 +352,8 @@ static int palmas_usb_resume(struct device *dev)
disable_irq_wake(palmas_usb->vbus_irq);
if (palmas_usb->enable_id_detection)
disable_irq_wake(palmas_usb->id_irq);
+ if (palmas_usb->enable_gpio_id_detection)
+ disable_irq_wake(palmas_usb->gpio_id_irq);
}
return 0;
};
@@ -273,6 +371,7 @@ static const struct of_device_id of_palmas_match_tbl[] = {
static struct platform_driver palmas_usb_driver = {
.probe = palmas_usb_probe,
+ .remove = palmas_usb_remove,
.driver = {
.name = "palmas-usb",
.of_match_table = of_palmas_match_tbl,
diff --git a/drivers/extcon/extcon-usb-gpio.c b/drivers/extcon/extcon-usb-gpio.c
index a2a44536a608..2b2fecffb1ad 100644
--- a/drivers/extcon/extcon-usb-gpio.c
+++ b/drivers/extcon/extcon-usb-gpio.c
@@ -15,6 +15,7 @@
*/
#include <linux/extcon.h>
+#include <linux/gpio.h>
#include <linux/gpio/consumer.h>
#include <linux/init.h>
#include <linux/interrupt.h>
diff --git a/include/linux/mfd/palmas.h b/include/linux/mfd/palmas.h
index bb270bd03eed..13e1d96935ed 100644
--- a/include/linux/mfd/palmas.h
+++ b/include/linux/mfd/palmas.h
@@ -21,6 +21,7 @@
#include <linux/regmap.h>
#include <linux/regulator/driver.h>
#include <linux/extcon.h>
+#include <linux/of_gpio.h>
#include <linux/usb/phy_companion.h>
#define PALMAS_NUM_CLIENTS 3
@@ -551,10 +552,16 @@ struct palmas_usb {
int vbus_otg_irq;
int vbus_irq;
+ int gpio_id_irq;
+ struct gpio_desc *id_gpiod;
+ unsigned long sw_debounce_jiffies;
+ struct delayed_work wq_detectid;
+
enum palmas_usb_state linkstat;
int wakeup;
bool enable_vbus_detection;
bool enable_id_detection;
+ bool enable_gpio_id_detection;
};
#define comparator_to_palmas(x) container_of((x), struct palmas_usb, comparator)
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-28 21:51:15 +0000