On Thu, Feb 29, 2024 at 09:34:50AM +0100, Javier Carrasco wrote:
> 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.carra...@wolfvision.net>
> ---
> 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);
> +
nit: remove one empty line
>
> 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 */
nit: either drop the comment (the variable name is pretty self explaining),
or s/HUB/hub/ ('hub' isn't an acronym).
Acked-by: Matthias Kaehlcke <m...@chromium.org>
