From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jRADf-0003F5-Ov for barebox@lists.infradead.org; Wed, 22 Apr 2020 07:54:58 +0000 From: Sascha Hauer Date: Wed, 22 Apr 2020 09:54:46 +0200 Message-Id: <20200422075452.25226-6-s.hauer@pengutronix.de> In-Reply-To: <20200422075452.25226-1-s.hauer@pengutronix.de> References: <20200422075452.25226-1-s.hauer@pengutronix.de> MIME-Version: 1.0 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH 05/11] net: mdiobus: Add slice To: Barebox List Cc: Edmund Henniges , =?UTF-8?q?Daniel=20Gl=C3=B6ckner?= By adding a slice to the mdio bus we make the mdio code safe for being called in a poller. Signed-off-by: Sascha Hauer --- drivers/net/phy/mdio_bus.c | 41 ++++++++++++++++++++++++++++++++++++++ include/linux/phy.h | 38 ++++++++++++++--------------------- 2 files changed, 56 insertions(+), 23 deletions(-) diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c index 3480e2ffb4..9a76db6ad4 100644 --- a/drivers/net/phy/mdio_bus.c +++ b/drivers/net/phy/mdio_bus.c @@ -239,6 +239,8 @@ int mdiobus_register(struct mii_bus *bus) return -EINVAL; } + slice_init(&bus->slice, dev_name(&bus->dev)); + if (bus->reset) bus->reset(bus); @@ -357,6 +359,45 @@ static int mdio_bus_match(struct device_d *dev, struct driver_d *drv) return 1; } +/** + * mdiobus_read - Convenience function for reading a given MII mgmt register + * @bus: the mii_bus struct + * @addr: the phy address + * @regnum: register number to read + */ +int mdiobus_read(struct mii_bus *bus, int addr, u32 regnum) +{ + int ret; + + slice_acquire(&bus->slice); + + ret = bus->read(bus, addr, regnum); + + slice_release(&bus->slice); + + return ret; +} + +/** + * mdiobus_write - Convenience function for writing a given MII mgmt register + * @bus: the mii_bus struct + * @addr: the phy address + * @regnum: register number to write + * @val: value to write to @regnum + */ +int mdiobus_write(struct mii_bus *bus, int addr, u32 regnum, u16 val) +{ + int ret; + + slice_acquire(&bus->slice); + + ret = bus->write(bus, addr, regnum, val); + + slice_release(&bus->slice); + + return ret; +} + static ssize_t phydev_read(struct cdev *cdev, void *_buf, size_t count, loff_t offset, ulong flags) { int i = count; diff --git a/include/linux/phy.h b/include/linux/phy.h index a9fdf44f1a..e93f6a01ff 100644 --- a/include/linux/phy.h +++ b/include/linux/phy.h @@ -16,6 +16,7 @@ #define __PHY_H #include +#include #include #include #include @@ -116,9 +117,16 @@ struct mii_bus { struct list_head list; bool is_multiplexed; + + struct slice slice; }; #define to_mii_bus(d) container_of(d, struct mii_bus, dev) +static inline struct slice *mdiobus_slice(struct mii_bus *bus) +{ + return &bus->slice; +} + int mdiobus_register(struct mii_bus *bus); void mdiobus_unregister(struct mii_bus *bus); struct phy_device *mdiobus_scan(struct mii_bus *bus, int addr); @@ -134,28 +142,8 @@ struct mii_bus *mdiobus_get_bus(int busnum); struct mii_bus *of_mdio_find_bus(struct device_node *mdio_bus_np); -/** - * mdiobus_read - Convenience function for reading a given MII mgmt register - * @bus: the mii_bus struct - * @addr: the phy address - * @regnum: register number to read - */ -static inline int mdiobus_read(struct mii_bus *bus, int addr, u32 regnum) -{ - return bus->read(bus, addr, regnum); -} - -/** - * mdiobus_write - Convenience function for writing a given MII mgmt register - * @bus: the mii_bus struct - * @addr: the phy address - * @regnum: register number to write - * @val: value to write to @regnum - */ -static inline int mdiobus_write(struct mii_bus *bus, int addr, u32 regnum, u16 val) -{ - return bus->write(bus, addr, regnum, val); -} +int mdiobus_read(struct mii_bus *bus, int addr, u32 regnum); +int mdiobus_write(struct mii_bus *bus, int addr, u32 regnum, u16 val); /* phy_device: An instance of a PHY * @@ -376,11 +364,15 @@ int phy_register_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask, int phy_register_fixup_for_id(const char *bus_id, int (*run)(struct phy_device *)); int phy_scan_fixups(struct phy_device *phydev); - int phy_read_mmd_indirect(struct phy_device *phydev, int prtad, int devad); void phy_write_mmd_indirect(struct phy_device *phydev, int prtad, int devad, u16 data); +static inline bool phy_acquired(struct phy_device *phydev) +{ + return phydev && slice_acquired(&phydev->bus->slice); +} + #ifdef CONFIG_PHYLIB int phy_register_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask, int (*run)(struct phy_device *)); -- 2.26.1 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox