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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>
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: Optional Properties:
- ti,wakeup : To enable the wakeup comparator in probe - 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 { palmas-usb {
compatible = "ti,twl6035-usb", "ti,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_GND |
PALMAS_USB_ID_INT_EN_HI_SET_ID_FLOAT); 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 */ /* cold plug for host mode needs this delay */
msleep(30); if (palmas_usb->enable_id_detection) {
palmas_id_irq_handler(palmas_usb->id_irq, palmas_usb); msleep(30);
palmas_id_irq_handler(palmas_usb->id_irq, palmas_usb);
}
} }
static int palmas_usb_probe(struct platform_device *pdev) 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; struct palmas_usb *palmas_usb;
int status; 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); palmas_usb = devm_kzalloc(&pdev->dev, sizeof(*palmas_usb), GFP_KERNEL);
if (!palmas_usb) if (!palmas_usb)
return -ENOMEM; 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_usb;
palmas_usb->palmas = palmas; 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_usb->vbus_irq = regmap_irq_get_virq(palmas->irq_data,
PALMAS_VBUS_IRQ); PALMAS_VBUS_IRQ);
palmas_usb_wakeup(palmas, pdata->wakeup); palmas_usb_wakeup(palmas, palmas_usb->wakeup);
platform_set_drvdata(pdev, palmas_usb); platform_set_drvdata(pdev, palmas_usb);
@ -179,26 +186,32 @@ static int palmas_usb_probe(struct platform_device *pdev)
return status; return status;
} }
status = devm_request_threaded_irq(palmas_usb->dev, palmas_usb->id_irq, if (palmas_usb->enable_id_detection) {
NULL, palmas_id_irq_handler, status = devm_request_threaded_irq(palmas_usb->dev,
IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING | palmas_usb->id_irq,
IRQF_ONESHOT | IRQF_EARLY_RESUME, NULL, palmas_id_irq_handler,
"palmas_usb_id", palmas_usb); IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING |
if (status < 0) { IRQF_ONESHOT | IRQF_EARLY_RESUME,
dev_err(&pdev->dev, "can't get IRQ %d, err %d\n", "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); palmas_usb->id_irq, status);
goto fail_extcon; goto fail_extcon;
}
} }
status = devm_request_threaded_irq(palmas_usb->dev, if (palmas_usb->enable_vbus_detection) {
palmas_usb->vbus_irq, NULL, palmas_vbus_irq_handler, status = devm_request_threaded_irq(palmas_usb->dev,
IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING | palmas_usb->vbus_irq, NULL,
IRQF_ONESHOT | IRQF_EARLY_RESUME, palmas_vbus_irq_handler,
"palmas_usb_vbus", palmas_usb); IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING |
if (status < 0) { IRQF_ONESHOT | IRQF_EARLY_RESUME,
dev_err(&pdev->dev, "can't get IRQ %d, err %d\n", "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); palmas_usb->vbus_irq, status);
goto fail_extcon; goto fail_extcon;
}
} }
palmas_enable_irq(palmas_usb); 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); struct palmas_usb *palmas_usb = dev_get_drvdata(dev);
if (device_may_wakeup(dev)) { if (device_may_wakeup(dev)) {
enable_irq_wake(palmas_usb->vbus_irq); if (palmas_usb->enable_vbus_detection)
enable_irq_wake(palmas_usb->id_irq); enable_irq_wake(palmas_usb->vbus_irq);
if (palmas_usb->enable_id_detection)
enable_irq_wake(palmas_usb->id_irq);
} }
return 0; return 0;
} }
@ -237,8 +252,10 @@ static int palmas_usb_resume(struct device *dev)
struct palmas_usb *palmas_usb = dev_get_drvdata(dev); struct palmas_usb *palmas_usb = dev_get_drvdata(dev);
if (device_may_wakeup(dev)) { if (device_may_wakeup(dev)) {
disable_irq_wake(palmas_usb->vbus_irq); if (palmas_usb->enable_vbus_detection)
disable_irq_wake(palmas_usb->id_irq); disable_irq_wake(palmas_usb->vbus_irq);
if (palmas_usb->enable_id_detection)
disable_irq_wake(palmas_usb->id_irq);
} }
return 0; return 0;
}; };

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

@ -377,6 +377,9 @@ struct palmas_usb {
int vbus_irq; int vbus_irq;
enum palmas_usb_state linkstat; 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) #define comparator_to_palmas(x) container_of((x), struct palmas_usb, comparator)