diff options
Diffstat (limited to 'drivers/usb/phy/phy.c')
| -rw-r--r-- | drivers/usb/phy/phy.c | 97 |
1 files changed, 70 insertions, 27 deletions
diff --git a/drivers/usb/phy/phy.c b/drivers/usb/phy/phy.c index d1cd6b50f520..98f75d2842b7 100644 --- a/drivers/usb/phy/phy.c +++ b/drivers/usb/phy/phy.c @@ -22,6 +22,11 @@ static LIST_HEAD(phy_list); static LIST_HEAD(phy_bind_list); static DEFINE_SPINLOCK(phy_lock); +struct phy_devm { + struct usb_phy *phy; + struct notifier_block *nb; +}; + static struct usb_phy *__usb_find_phy(struct list_head *list, enum usb_phy_type type) { @@ -79,6 +84,15 @@ static void devm_usb_phy_release(struct device *dev, void *res) usb_put_phy(phy); } +static void devm_usb_phy_release2(struct device *dev, void *_res) +{ + struct phy_devm *res = _res; + + if (res->nb) + usb_unregister_notifier(res->phy, res->nb); + usb_put_phy(res->phy); +} + static int devm_usb_phy_match(struct device *dev, void *res, void *match_data) { struct usb_phy **phy = res; @@ -153,40 +167,30 @@ err0: EXPORT_SYMBOL_GPL(usb_get_phy); /** - * devm_usb_get_phy_by_phandle - find the USB PHY by phandle + * devm_usb_get_phy_by_node - find the USB PHY by device_node * @dev - device that requests this phy - * @phandle - name of the property holding the phy phandle value - * @index - the index of the phy + * @node - the device_node for the phy device. + * @nb - a notifier_block to register with the phy. * - * Returns the phy driver associated with the given phandle value, + * Returns the phy driver associated with the given device_node, * after getting a refcount to it, -ENODEV if there is no such phy or - * -EPROBE_DEFER if there is a phandle to the phy, but the device is - * not yet loaded. While at that, it also associates the device with + * -EPROBE_DEFER if the device is not yet loaded. While at that, it + * also associates the device with * the phy using devres. On driver detach, release function is invoked * on the devres data, then, devres data is freed. * - * For use by USB host and peripheral drivers. + * For use by peripheral drivers for devices related to a phy, + * such as a charger. */ -struct usb_phy *devm_usb_get_phy_by_phandle(struct device *dev, - const char *phandle, u8 index) +struct usb_phy *devm_usb_get_phy_by_node(struct device *dev, + struct device_node *node, + struct notifier_block *nb) { - struct usb_phy *phy = ERR_PTR(-ENOMEM), **ptr; + struct usb_phy *phy = ERR_PTR(-ENOMEM); + struct phy_devm *ptr; unsigned long flags; - struct device_node *node; - if (!dev->of_node) { - dev_dbg(dev, "device does not have a device node entry\n"); - return ERR_PTR(-EINVAL); - } - - node = of_parse_phandle(dev->of_node, phandle, index); - if (!node) { - dev_dbg(dev, "failed to get %s phandle in %s node\n", phandle, - dev->of_node->full_name); - return ERR_PTR(-ENODEV); - } - - ptr = devres_alloc(devm_usb_phy_release, sizeof(*ptr), GFP_KERNEL); + ptr = devres_alloc(devm_usb_phy_release2, sizeof(*ptr), GFP_KERNEL); if (!ptr) { dev_dbg(dev, "failed to allocate memory for devres\n"); goto err0; @@ -205,8 +209,10 @@ struct usb_phy *devm_usb_get_phy_by_phandle(struct device *dev, devres_free(ptr); goto err1; } - - *ptr = phy; + if (nb) + usb_register_notifier(phy, nb); + ptr->phy = phy; + ptr->nb = nb; devres_add(dev, ptr); get_device(phy->dev); @@ -215,10 +221,47 @@ err1: spin_unlock_irqrestore(&phy_lock, flags); err0: - of_node_put(node); return phy; } +EXPORT_SYMBOL_GPL(devm_usb_get_phy_by_node); + +/** + * devm_usb_get_phy_by_phandle - find the USB PHY by phandle + * @dev - device that requests this phy + * @phandle - name of the property holding the phy phandle value + * @index - the index of the phy + * + * Returns the phy driver associated with the given phandle value, + * after getting a refcount to it, -ENODEV if there is no such phy or + * -EPROBE_DEFER if there is a phandle to the phy, but the device is + * not yet loaded. While at that, it also associates the device with + * the phy using devres. On driver detach, release function is invoked + * on the devres data, then, devres data is freed. + * + * For use by USB host and peripheral drivers. + */ +struct usb_phy *devm_usb_get_phy_by_phandle(struct device *dev, + const char *phandle, u8 index) +{ + struct device_node *node; + struct usb_phy *phy; + + if (!dev->of_node) { + dev_dbg(dev, "device does not have a device node entry\n"); + return ERR_PTR(-EINVAL); + } + + node = of_parse_phandle(dev->of_node, phandle, index); + if (!node) { + dev_dbg(dev, "failed to get %s phandle in %s node\n", phandle, + dev->of_node->full_name); + return ERR_PTR(-ENODEV); + } + phy = devm_usb_get_phy_by_node(dev, node, NULL); + of_node_put(node); + return phy; +} EXPORT_SYMBOL_GPL(devm_usb_get_phy_by_phandle); /** |