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extcon: palmas: Option to disable ID/VBUS detection based on platform

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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>
This commit is contained in:
Laxman Dewangan 2013-07-10 14:59:06 +05:30 committed by Chanwoo Choi
parent 024783ef42
commit 7281e05aab
3 changed files with 57 additions and 35 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
Documentation/devicetree/bindings/extcon/extcon-palmas.txt
View File

@ -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";

87
drivers/extcon/extcon-palmas.c
View File

@ -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;
};

3
include/linux/mfd/palmas.h
View File

@ -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)