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authorLaxman Dewangan <ldewangan@nvidia.com>2013-07-10 13:29:06 +0400
committerChanwoo Choi <cw00.choi@samsung.com>2013-08-05 03:53:34 +0400
commit7281e05aabee7484624d448da208932690ed62b3 (patch)
tree27a6516f3d805e61c794d355f0e1c818497939d3
parent024783ef422791d7ca58b106495f7c31802df6f3 (diff)
downloadlinux-7281e05aabee7484624d448da208932690ed62b3.tar.xz
extcon: palmas: Option to disable ID/VBUS detection based on platform
Based on system design, platform needs to detect the VBUS or ID or both. Provide option to select this through platform data to disable part of cable detection through palmas-usb. Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Acked-by: Graeme Gregory <gg@slimlogic.co.uk> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Myungjoo Ham <myungjoo.ham@samsung.com>
-rw-r--r--Documentation/devicetree/bindings/extcon/extcon-palmas.txt2
-rw-r--r--drivers/extcon/extcon-palmas.c87
-rw-r--r--include/linux/mfd/palmas.h3
3 files changed, 57 insertions, 35 deletions
diff --git a/Documentation/devicetree/bindings/extcon/extcon-palmas.txt b/Documentation/devicetree/bindings/extcon/extcon-palmas.txt
index f110e75fd0a1..7dab6a8f4a0e 100644
--- a/Documentation/devicetree/bindings/extcon/extcon-palmas.txt
+++ b/Documentation/devicetree/bindings/extcon/extcon-palmas.txt
@@ -6,6 +6,8 @@ Required Properties:
Optional Properties:
- ti,wakeup : To enable the wakeup comparator in probe
+ - ti,enable-id-detection: Perform ID detection.
+ - ti,enable-vbus-detection: Perform VBUS detection.
palmas-usb {
compatible = "ti,twl6035-usb", "ti,palmas-usb";
diff --git a/drivers/extcon/extcon-palmas.c b/drivers/extcon/extcon-palmas.c
index d0ce0f16de70..89fdd05c5fd6 100644
--- a/drivers/extcon/extcon-palmas.c
+++ b/drivers/extcon/extcon-palmas.c
@@ -122,11 +122,14 @@ static void palmas_enable_irq(struct palmas_usb *palmas_usb)
PALMAS_USB_ID_INT_EN_HI_SET_ID_GND |
PALMAS_USB_ID_INT_EN_HI_SET_ID_FLOAT);
- palmas_vbus_irq_handler(palmas_usb->vbus_irq, palmas_usb);
+ if (palmas_usb->enable_vbus_detection)
+ palmas_vbus_irq_handler(palmas_usb->vbus_irq, palmas_usb);
/* cold plug for host mode needs this delay */
- msleep(30);
- palmas_id_irq_handler(palmas_usb->id_irq, palmas_usb);
+ if (palmas_usb->enable_id_detection) {
+ msleep(30);
+ palmas_id_irq_handler(palmas_usb->id_irq, palmas_usb);
+ }
}
static int palmas_usb_probe(struct platform_device *pdev)
@@ -137,21 +140,25 @@ static int palmas_usb_probe(struct platform_device *pdev)
struct palmas_usb *palmas_usb;
int status;
- if (node && !pdata) {
- pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
-
- if (!pdata)
- return -ENOMEM;
-
- pdata->wakeup = of_property_read_bool(node, "ti,wakeup");
- } else if (!pdata) {
- return -EINVAL;
- }
-
palmas_usb = devm_kzalloc(&pdev->dev, sizeof(*palmas_usb), GFP_KERNEL);
if (!palmas_usb)
return -ENOMEM;
+ if (node && !pdata) {
+ palmas_usb->wakeup = of_property_read_bool(node, "ti,wakeup");
+ palmas_usb->enable_id_detection = of_property_read_bool(node,
+ "ti,enable-id-detection");
+ palmas_usb->enable_vbus_detection = of_property_read_bool(node,
+ "ti,enable-vbus-detection");
+ } else {
+ palmas_usb->wakeup = true;
+ palmas_usb->enable_id_detection = true;
+ palmas_usb->enable_vbus_detection = true;
+
+ if (pdata)
+ palmas_usb->wakeup = pdata->wakeup;
+ }
+
palmas->usb = palmas_usb;
palmas_usb->palmas = palmas;
@@ -166,7 +173,7 @@ static int palmas_usb_probe(struct platform_device *pdev)
palmas_usb->vbus_irq = regmap_irq_get_virq(palmas->irq_data,
PALMAS_VBUS_IRQ);
- palmas_usb_wakeup(palmas, pdata->wakeup);
+ palmas_usb_wakeup(palmas, palmas_usb->wakeup);
platform_set_drvdata(pdev, palmas_usb);
@@ -179,26 +186,32 @@ static int palmas_usb_probe(struct platform_device *pdev)
return status;
}
- status = devm_request_threaded_irq(palmas_usb->dev, palmas_usb->id_irq,
- NULL, palmas_id_irq_handler,
- IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING |
- IRQF_ONESHOT | IRQF_EARLY_RESUME,
- "palmas_usb_id", palmas_usb);
- if (status < 0) {
- dev_err(&pdev->dev, "can't get IRQ %d, err %d\n",
+ if (palmas_usb->enable_id_detection) {
+ status = devm_request_threaded_irq(palmas_usb->dev,
+ palmas_usb->id_irq,
+ NULL, palmas_id_irq_handler,
+ IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING |
+ IRQF_ONESHOT | IRQF_EARLY_RESUME,
+ "palmas_usb_id", palmas_usb);
+ if (status < 0) {
+ dev_err(&pdev->dev, "can't get IRQ %d, err %d\n",
palmas_usb->id_irq, status);
- goto fail_extcon;
+ goto fail_extcon;
+ }
}
- status = devm_request_threaded_irq(palmas_usb->dev,
- palmas_usb->vbus_irq, NULL, palmas_vbus_irq_handler,
- IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING |
- IRQF_ONESHOT | IRQF_EARLY_RESUME,
- "palmas_usb_vbus", palmas_usb);
- if (status < 0) {
- dev_err(&pdev->dev, "can't get IRQ %d, err %d\n",
+ if (palmas_usb->enable_vbus_detection) {
+ status = devm_request_threaded_irq(palmas_usb->dev,
+ palmas_usb->vbus_irq, NULL,
+ palmas_vbus_irq_handler,
+ IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING |
+ IRQF_ONESHOT | IRQF_EARLY_RESUME,
+ "palmas_usb_vbus", palmas_usb);
+ if (status < 0) {
+ dev_err(&pdev->dev, "can't get IRQ %d, err %d\n",
palmas_usb->vbus_irq, status);
- goto fail_extcon;
+ goto fail_extcon;
+ }
}
palmas_enable_irq(palmas_usb);
@@ -226,8 +239,10 @@ static int palmas_usb_suspend(struct device *dev)
struct palmas_usb *palmas_usb = dev_get_drvdata(dev);
if (device_may_wakeup(dev)) {
- enable_irq_wake(palmas_usb->vbus_irq);
- enable_irq_wake(palmas_usb->id_irq);
+ if (palmas_usb->enable_vbus_detection)
+ enable_irq_wake(palmas_usb->vbus_irq);
+ if (palmas_usb->enable_id_detection)
+ enable_irq_wake(palmas_usb->id_irq);
}
return 0;
}
@@ -237,8 +252,10 @@ static int palmas_usb_resume(struct device *dev)
struct palmas_usb *palmas_usb = dev_get_drvdata(dev);
if (device_may_wakeup(dev)) {
- disable_irq_wake(palmas_usb->vbus_irq);
- disable_irq_wake(palmas_usb->id_irq);
+ if (palmas_usb->enable_vbus_detection)
+ disable_irq_wake(palmas_usb->vbus_irq);
+ if (palmas_usb->enable_id_detection)
+ disable_irq_wake(palmas_usb->id_irq);
}
return 0;
};
diff --git a/include/linux/mfd/palmas.h b/include/linux/mfd/palmas.h
index 03c22ca55446..cfc678ceb570 100644
--- a/include/linux/mfd/palmas.h
+++ b/include/linux/mfd/palmas.h
@@ -377,6 +377,9 @@ struct palmas_usb {
int vbus_irq;
enum palmas_usb_state linkstat;
+ int wakeup;
+ bool enable_vbus_detection;
+ bool enable_id_detection;
};
#define comparator_to_palmas(x) container_of((x), struct palmas_usb, comparator)