From 300eb0139cf27044c67f6005ff17b8434c7843f0 Mon Sep 17 00:00:00 2001 From: David Lechner Date: Mon, 9 May 2016 18:39:59 -0500 Subject: [PATCH] phy: Add set_mode callback The initial use for this is for PHYs that have a mode related to USB OTG. There are several SoCs (e.g. TI OMAP and DA8xx) that have a mode setting in the USB PHY to override OTG VBUS and ID signals. Of course, the enum can be expaned in the future to include modes for other types of PHYs as well. Suggested-by: Kishon Vijay Abraham I Signed-off-by: David Lechner --- drivers/phy/phy-core.c | 15 +++++++++++++++ include/linux/phy/phy.h | 17 +++++++++++++++++ 2 files changed, 32 insertions(+) diff --git a/drivers/phy/phy-core.c b/drivers/phy/phy-core.c index b72e9a3..8eca906 100644 --- a/drivers/phy/phy-core.c +++ b/drivers/phy/phy-core.c @@ -342,6 +342,21 @@ int phy_power_off(struct phy *phy) } EXPORT_SYMBOL_GPL(phy_power_off); +int phy_set_mode(struct phy *phy, enum phy_mode mode) +{ + int ret; + + if (!phy || !phy->ops->set_mode) + return 0; + + mutex_lock(&phy->mutex); + ret = phy->ops->set_mode(phy, mode); + mutex_unlock(&phy->mutex); + + return ret; +} +EXPORT_SYMBOL_GPL(phy_set_mode); + /** * _of_phy_get() - lookup and obtain a reference to a phy by phandle * @np: device_node for which to get the phy diff --git a/include/linux/phy/phy.h b/include/linux/phy/phy.h index a810f2a..f08b672 100644 --- a/include/linux/phy/phy.h +++ b/include/linux/phy/phy.h @@ -22,12 +22,20 @@ struct phy; +enum phy_mode { + PHY_MODE_INVALID, + PHY_MODE_USB_HOST, + PHY_MODE_USB_DEVICE, + PHY_MODE_USB_OTG, +}; + /** * struct phy_ops - set of function pointers for performing phy operations * @init: operation to be performed for initializing phy * @exit: operation to be performed while exiting * @power_on: powering on the phy * @power_off: powering off the phy + * @set_mode: set the mode of the phy * @owner: the module owner containing the ops */ struct phy_ops { @@ -35,6 +43,7 @@ struct phy_ops { int (*exit)(struct phy *phy); int (*power_on)(struct phy *phy); int (*power_off)(struct phy *phy); + int (*set_mode)(struct phy *phy, enum phy_mode mode); struct module *owner; }; @@ -126,6 +135,7 @@ int phy_init(struct phy *phy); int phy_exit(struct phy *phy); int phy_power_on(struct phy *phy); int phy_power_off(struct phy *phy); +int phy_set_mode(struct phy *phy, enum phy_mode mode); static inline int phy_get_bus_width(struct phy *phy) { return phy->attrs.bus_width; @@ -233,6 +243,13 @@ static inline int phy_power_off(struct phy *phy) return -ENOSYS; } +static inline int phy_set_mode(struct phy *phy, enum phy_mode mode) +{ + if (!phy) + return 0; + return -ENOSYS; +} + static inline int phy_get_bus_width(struct phy *phy) { return -ENOSYS; -- 2.7.4