[PATCH v6 7/9] usb: misc: onboard_dev: add support for non-hub devices

[Javier Carrasco]

Most of the functionality this driver provides can be used by non-hub
devices as well.

To account for the hub-specific code, add a flag to the device data
structure and check its value for hub-specific code.

The 'always_powered_in_supend' attribute is only available for hub
devices, keeping the driver's default behavior for non-hub devices (keep
on in suspend).

Signed-off-by: Javier Carrasco <javier.carrasco@xxxxxxxxxxxxxx>
---
 drivers/usb/misc/onboard_usb_dev.c | 25 ++++++++++++++++++++++++-
 drivers/usb/misc/onboard_usb_dev.h | 10 ++++++++++
 2 files changed, 34 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/misc/onboard_usb_dev.c b/drivers/usb/misc/onboard_usb_dev.c
index 4ae580445408..f1b174503c44 100644
--- a/drivers/usb/misc/onboard_usb_dev.c
+++ b/drivers/usb/misc/onboard_usb_dev.c
@@ -261,7 +261,27 @@ static struct attribute *onboard_dev_attrs[] = {
 	&dev_attr_always_powered_in_suspend.attr,
 	NULL,
 };
-ATTRIBUTE_GROUPS(onboard_dev);
+
+static umode_t onboard_dev_attrs_are_visible(struct kobject *kobj,
+					     struct attribute *attr,
+					     int n)
+{
+	struct device *dev = kobj_to_dev(kobj);
+	struct onboard_dev *onboard_dev = dev_get_drvdata(dev);
+
+	if (attr == &dev_attr_always_powered_in_suspend.attr &&
+	    !onboard_dev->pdata->is_hub)
+		return 0;
+
+	return attr->mode;
+}
+
+static const struct attribute_group onboard_dev_group = {
+	.is_visible = onboard_dev_attrs_are_visible,
+	.attrs = onboard_dev_attrs,
+};
+__ATTRIBUTE_GROUPS(onboard_dev);
+
 
 static void onboard_dev_attach_usb_driver(struct work_struct *work)
 {
@@ -286,6 +306,9 @@ static int onboard_dev_probe(struct platform_device *pdev)
 	if (!onboard_dev->pdata)
 		return -EINVAL;
 
+	if (!onboard_dev->pdata->is_hub)
+		onboard_dev->always_powered_in_suspend = true;
+
 	onboard_dev->dev = dev;
 
 	err = onboard_dev_get_regulators(onboard_dev);
diff --git a/drivers/usb/misc/onboard_usb_dev.h b/drivers/usb/misc/onboard_usb_dev.h
index 4da9f3b7f9e9..58cf8c81b2cf 100644
--- a/drivers/usb/misc/onboard_usb_dev.h
+++ b/drivers/usb/misc/onboard_usb_dev.h
@@ -12,60 +12,70 @@ struct onboard_dev_pdata {
 	unsigned long reset_us;		/* reset pulse width in us */
 	unsigned int num_supplies;	/* number of supplies */
 	const char * const supply_names[MAX_SUPPLIES];
+	bool is_hub;			/* true if the device is a HUB */
 };
 
 static const struct onboard_dev_pdata microchip_usb424_data = {
 	.reset_us = 1,
 	.num_supplies = 1,
 	.supply_names = { "vdd" },
+	.is_hub = true,
 };
 
 static const struct onboard_dev_pdata microchip_usb5744_data = {
 	.reset_us = 0,
 	.num_supplies = 2,
 	.supply_names = { "vdd", "vdd2" },
+	.is_hub = true,
 };
 
 static const struct onboard_dev_pdata realtek_rts5411_data = {
 	.reset_us = 0,
 	.num_supplies = 1,
 	.supply_names = { "vdd" },
+	.is_hub = true,
 };
 
 static const struct onboard_dev_pdata ti_tusb8041_data = {
 	.reset_us = 3000,
 	.num_supplies = 1,
 	.supply_names = { "vdd" },
+	.is_hub = true,
 };
 
 static const struct onboard_dev_pdata cypress_hx3_data = {
 	.reset_us = 10000,
 	.num_supplies = 2,
 	.supply_names = { "vdd", "vdd2" },
+	.is_hub = true,
 };
 
 static const struct onboard_dev_pdata cypress_hx2vl_data = {
 	.reset_us = 1,
 	.num_supplies = 1,
 	.supply_names = { "vdd" },
+	.is_hub = true,
 };
 
 static const struct onboard_dev_pdata genesys_gl850g_data = {
 	.reset_us = 3,
 	.num_supplies = 1,
 	.supply_names = { "vdd" },
+	.is_hub = true,
 };
 
 static const struct onboard_dev_pdata genesys_gl852g_data = {
 	.reset_us = 50,
 	.num_supplies = 1,
 	.supply_names = { "vdd" },
+	.is_hub = true,
 };
 
 static const struct onboard_dev_pdata vialab_vl817_data = {
 	.reset_us = 10,
 	.num_supplies = 1,
 	.supply_names = { "vdd" },
+	.is_hub = true,
 };
 
 static const struct of_device_id onboard_dev_match[] = {

-- 
2.40.1