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Miller" Cc: netdev@vger.kernel.org, Laurent Pinchart , Linus Walleij Subject: [PATCH] net: phy: fixed-phy: Drop GPIO from fixed_phy_add() Date: Mon, 14 Jan 2019 09:02:25 +0100 Message-Id: <20190114080225.3805-1-linus.walleij@linaro.org> X-Mailer: git-send-email 2.19.2 MIME-Version: 1.0 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org All users of the fixed_phy_add() pass -1 as GPIO number to the fixed phy driver, and all users of fixed_phy_register() pass -1 as GPIO number as well, except for the device tree MDIO bus. Any new users should create a proper device and pass the GPIO as a descriptor associated with the device so delete the GPIO argument from the calls and drop the code looking requesting a GPIO in fixed_phy_add(). In fixed phy_register(), investigate the "fixed-link" node and pick the GPIO descriptor from "link-gpios" if this property exists. Move the corresponding code out of of_mdio.c as the fixed phy code anyways requires OF to be in use. Signed-off-by: Linus Walleij --- Possibly more of of_mdio.c should be moved over to drivers/net/ but I can't see clearly where. It doesn't really belong in drivers/of IMO. of_phy_register_fixed_link() really feels like it is in the wrong place, so sending a separate patch for that. --- .../device_drivers/stmicro/stmmac.txt | 2 +- arch/m68k/coldfire/m5272.c | 2 +- arch/mips/ar7/platform.c | 4 +- arch/mips/bcm47xx/setup.c | 2 +- drivers/net/dsa/dsa_loop.c | 2 +- drivers/net/ethernet/broadcom/bgmac.c | 2 +- drivers/net/ethernet/broadcom/genet/bcmmii.c | 2 +- drivers/net/phy/fixed_phy.c | 81 ++++++++++++++----- drivers/net/usb/lan78xx.c | 3 +- drivers/of/of_mdio.c | 9 +-- include/linux/phy_fixed.h | 8 +- 11 files changed, 71 insertions(+), 46 deletions(-) -- 2.19.2 Tested-by: Andrew Lunn diff --git a/Documentation/networking/device_drivers/stmicro/stmmac.txt b/Documentation/networking/device_drivers/stmicro/stmmac.txt index 2bb07078f535..1ae979fd90d2 100644 --- a/Documentation/networking/device_drivers/stmicro/stmmac.txt +++ b/Documentation/networking/device_drivers/stmicro/stmmac.txt @@ -267,7 +267,7 @@ static struct fixed_phy_status stmmac0_fixed_phy_status = { During the board's device_init we can configure the first MAC for fixed_link by calling: - fixed_phy_add(PHY_POLL, 1, &stmmac0_fixed_phy_status, -1); + fixed_phy_add(PHY_POLL, 1, &stmmac0_fixed_phy_status); and the second one, with a real PHY device attached to the bus, by using the stmmac_mdio_bus_data structure (to provide the id, the reset procedure etc). diff --git a/arch/m68k/coldfire/m5272.c b/arch/m68k/coldfire/m5272.c index ad1185c68df7..6b3ab583c698 100644 --- a/arch/m68k/coldfire/m5272.c +++ b/arch/m68k/coldfire/m5272.c @@ -127,7 +127,7 @@ static struct fixed_phy_status nettel_fixed_phy_status __initdata = { static int __init init_BSP(void) { m5272_uarts_init(); - fixed_phy_add(PHY_POLL, 0, &nettel_fixed_phy_status, -1); + fixed_phy_add(PHY_POLL, 0, &nettel_fixed_phy_status); return 0; } diff --git a/arch/mips/ar7/platform.c b/arch/mips/ar7/platform.c index f09262e0a72f..10ff07b7721e 100644 --- a/arch/mips/ar7/platform.c +++ b/arch/mips/ar7/platform.c @@ -683,7 +683,7 @@ static int __init ar7_register_devices(void) if (ar7_has_high_cpmac()) { res = fixed_phy_add(PHY_POLL, cpmac_high.id, - &fixed_phy_status, -1); + &fixed_phy_status); if (!res) { cpmac_get_mac(1, cpmac_high_data.dev_addr); @@ -696,7 +696,7 @@ static int __init ar7_register_devices(void) } else cpmac_low_data.phy_mask = 0xffffffff; - res = fixed_phy_add(PHY_POLL, cpmac_low.id, &fixed_phy_status, -1); + res = fixed_phy_add(PHY_POLL, cpmac_low.id, &fixed_phy_status); if (!res) { cpmac_get_mac(0, cpmac_low_data.dev_addr); res = platform_device_register(&cpmac_low); diff --git a/arch/mips/bcm47xx/setup.c b/arch/mips/bcm47xx/setup.c index 6054d49e608e..2517b8b611a8 100644 --- a/arch/mips/bcm47xx/setup.c +++ b/arch/mips/bcm47xx/setup.c @@ -243,7 +243,7 @@ static int __init bcm47xx_register_bus_complete(void) bcm47xx_leds_register(); bcm47xx_workarounds(); - fixed_phy_add(PHY_POLL, 0, &bcm47xx_fixed_phy_status, -1); + fixed_phy_add(PHY_POLL, 0, &bcm47xx_fixed_phy_status); return 0; } device_initcall(bcm47xx_register_bus_complete); diff --git a/drivers/net/dsa/dsa_loop.c b/drivers/net/dsa/dsa_loop.c index 816f34d64736..17482ae09aa5 100644 --- a/drivers/net/dsa/dsa_loop.c +++ b/drivers/net/dsa/dsa_loop.c @@ -343,7 +343,7 @@ static int __init dsa_loop_init(void) unsigned int i; for (i = 0; i < NUM_FIXED_PHYS; i++) - phydevs[i] = fixed_phy_register(PHY_POLL, &status, -1, NULL); + phydevs[i] = fixed_phy_register(PHY_POLL, &status, NULL); return mdio_driver_register(&dsa_loop_drv); } diff --git a/drivers/net/ethernet/broadcom/bgmac.c b/drivers/net/ethernet/broadcom/bgmac.c index cabc8e49ad24..76b480e65698 100644 --- a/drivers/net/ethernet/broadcom/bgmac.c +++ b/drivers/net/ethernet/broadcom/bgmac.c @@ -1446,7 +1446,7 @@ int bgmac_phy_connect_direct(struct bgmac *bgmac) struct phy_device *phy_dev; int err; - phy_dev = fixed_phy_register(PHY_POLL, &fphy_status, -1, NULL); + phy_dev = fixed_phy_register(PHY_POLL, &fphy_status, NULL); if (!phy_dev || IS_ERR(phy_dev)) { dev_err(bgmac->dev, "Failed to register fixed PHY device\n"); return -ENODEV; diff --git a/drivers/net/ethernet/broadcom/genet/bcmmii.c b/drivers/net/ethernet/broadcom/genet/bcmmii.c index aceb9b7b55bd..51880d83131a 100644 --- a/drivers/net/ethernet/broadcom/genet/bcmmii.c +++ b/drivers/net/ethernet/broadcom/genet/bcmmii.c @@ -525,7 +525,7 @@ static int bcmgenet_mii_pd_init(struct bcmgenet_priv *priv) .asym_pause = 0, }; - phydev = fixed_phy_register(PHY_POLL, &fphy_status, -1, NULL); + phydev = fixed_phy_register(PHY_POLL, &fphy_status, NULL); if (!phydev || IS_ERR(phydev)) { dev_err(kdev, "failed to register fixed PHY device\n"); return -ENODEV; diff --git a/drivers/net/phy/fixed_phy.c b/drivers/net/phy/fixed_phy.c index 72d43c88e6ff..4218619412e3 100644 --- a/drivers/net/phy/fixed_phy.c +++ b/drivers/net/phy/fixed_phy.c @@ -22,7 +22,7 @@ #include #include #include -#include +#include #include #include #include @@ -42,7 +42,7 @@ struct fixed_phy { bool no_carrier; int (*link_update)(struct net_device *, struct fixed_phy_status *); struct list_head node; - int link_gpio; + struct gpio_desc *link_gpiod; }; static struct platform_device *pdev; @@ -71,8 +71,8 @@ EXPORT_SYMBOL_GPL(fixed_phy_change_carrier); static void fixed_phy_update(struct fixed_phy *fp) { - if (!fp->no_carrier && gpio_is_valid(fp->link_gpio)) - fp->status.link = !!gpio_get_value_cansleep(fp->link_gpio); + if (!fp->no_carrier && fp->link_gpiod) + fp->status.link = !!gpiod_get_value_cansleep(fp->link_gpiod); } static int fixed_mdio_read(struct mii_bus *bus, int phy_addr, int reg_num) @@ -137,9 +137,9 @@ int fixed_phy_set_link_update(struct phy_device *phydev, } EXPORT_SYMBOL_GPL(fixed_phy_set_link_update); -int fixed_phy_add(unsigned int irq, int phy_addr, - struct fixed_phy_status *status, - int link_gpio) +static int fixed_phy_add_gpiod(unsigned int irq, int phy_addr, + struct fixed_phy_status *status, + struct gpio_desc *gpiod) { int ret; struct fixed_mdio_bus *fmb = &platform_fmb; @@ -160,24 +160,18 @@ int fixed_phy_add(unsigned int irq, int phy_addr, fp->addr = phy_addr; fp->status = *status; - fp->link_gpio = link_gpio; - - if (gpio_is_valid(fp->link_gpio)) { - ret = gpio_request_one(fp->link_gpio, GPIOF_DIR_IN, - "fixed-link-gpio-link"); - if (ret) - goto err_regs; - } + fp->link_gpiod = gpiod; fixed_phy_update(fp); list_add_tail(&fp->node, &fmb->phys); return 0; +} -err_regs: - kfree(fp); - return ret; +int fixed_phy_add(unsigned int irq, int phy_addr, + struct fixed_phy_status *status) { + return fixed_phy_add_gpiod(irq, phy_addr, status, NULL); } EXPORT_SYMBOL_GPL(fixed_phy_add); @@ -191,8 +185,8 @@ static void fixed_phy_del(int phy_addr) list_for_each_entry_safe(fp, tmp, &fmb->phys, node) { if (fp->addr == phy_addr) { list_del(&fp->node); - if (gpio_is_valid(fp->link_gpio)) - gpio_free(fp->link_gpio); + if (fp->link_gpiod) + gpiod_put(fp->link_gpiod); kfree(fp); ida_simple_remove(&phy_fixed_ida, phy_addr); return; @@ -200,25 +194,68 @@ static void fixed_phy_del(int phy_addr) } } +#ifdef CONFIG_OF_GPIO +static struct gpio_desc *fixed_phy_get_gpiod(struct device_node *np) +{ + struct device_node *fixed_link_node; + struct gpio_desc *gpiod; + + if (!np) + return NULL; + + fixed_link_node = of_get_child_by_name(np, "fixed-link"); + if (!fixed_link_node) + return NULL; + + /* + * As the fixed link is just a device tree node without any + * Linux device associated with it, we simply have to rip out + * the GPIO descriptor from the device tree like this. + */ + gpiod = gpiod_get_from_of_node(fixed_link_node, "link-gpios", 0, + GPIOD_IN, "mdio"); + of_node_put(fixed_link_node); + if (IS_ERR(gpiod)) { + /* Just return and bail on deferrals */ + if (PTR_ERR(gpiod) == -EPROBE_DEFER) + return gpiod; + pr_err("error getting GPIO for fixed link, proceed without\n"); + gpiod = NULL; + } + + return gpiod; +} +#else +static struct gpio_desc *fixed_phy_get_gpiod(struct device_node *np) +{ + return NULL; +} +#endif + struct phy_device *fixed_phy_register(unsigned int irq, struct fixed_phy_status *status, - int link_gpio, struct device_node *np) { struct fixed_mdio_bus *fmb = &platform_fmb; struct phy_device *phy; + struct gpio_desc *gpiod = NULL; int phy_addr; int ret; if (!fmb->mii_bus || fmb->mii_bus->state != MDIOBUS_REGISTERED) return ERR_PTR(-EPROBE_DEFER); + /* Check if we have a GPIO associated with this fixed phy */ + gpiod = fixed_phy_get_gpiod(np); + if (IS_ERR(gpiod)) + return ERR_CAST(gpiod); + /* Get the next available PHY address, up to PHY_MAX_ADDR */ phy_addr = ida_simple_get(&phy_fixed_ida, 0, PHY_MAX_ADDR, GFP_KERNEL); if (phy_addr < 0) return ERR_PTR(phy_addr); - ret = fixed_phy_add(irq, phy_addr, status, link_gpio); + ret = fixed_phy_add_gpiod(irq, phy_addr, status, gpiod); if (ret < 0) { ida_simple_remove(&phy_fixed_ida, phy_addr); return ERR_PTR(ret); diff --git a/drivers/net/usb/lan78xx.c b/drivers/net/usb/lan78xx.c index e96bc0c6140f..3d92ea6fcc02 100644 --- a/drivers/net/usb/lan78xx.c +++ b/drivers/net/usb/lan78xx.c @@ -2051,8 +2051,7 @@ static struct phy_device *lan7801_phy_init(struct lan78xx_net *dev) phydev = phy_find_first(dev->mdiobus); if (!phydev) { netdev_dbg(dev->net, "PHY Not Found!! Registering Fixed PHY\n"); - phydev = fixed_phy_register(PHY_POLL, &fphy_status, -1, - NULL); + phydev = fixed_phy_register(PHY_POLL, &fphy_status, NULL); if (IS_ERR(phydev)) { netdev_err(dev->net, "No PHY/fixed_PHY found\n"); return NULL; diff --git a/drivers/of/of_mdio.c b/drivers/of/of_mdio.c index 5ad1342f5682..de6157357e26 100644 --- a/drivers/of/of_mdio.c +++ b/drivers/of/of_mdio.c @@ -16,7 +16,6 @@ #include #include #include -#include #include #include #include @@ -463,7 +462,6 @@ int of_phy_register_fixed_link(struct device_node *np) struct device_node *fixed_link_node; u32 fixed_link_prop[5]; const char *managed; - int link_gpio = -1; if (of_property_read_string(np, "managed", &managed) == 0 && strcmp(managed, "in-band-status") == 0) { @@ -485,11 +483,7 @@ int of_phy_register_fixed_link(struct device_node *np) status.pause = of_property_read_bool(fixed_link_node, "pause"); status.asym_pause = of_property_read_bool(fixed_link_node, "asym-pause"); - link_gpio = of_get_named_gpio_flags(fixed_link_node, - "link-gpios", 0, NULL); of_node_put(fixed_link_node); - if (link_gpio == -EPROBE_DEFER) - return -EPROBE_DEFER; goto register_phy; } @@ -508,8 +502,7 @@ int of_phy_register_fixed_link(struct device_node *np) return -ENODEV; register_phy: - return PTR_ERR_OR_ZERO(fixed_phy_register(PHY_POLL, &status, link_gpio, - np)); + return PTR_ERR_OR_ZERO(fixed_phy_register(PHY_POLL, &status, np)); } EXPORT_SYMBOL(of_phy_register_fixed_link); diff --git a/include/linux/phy_fixed.h b/include/linux/phy_fixed.h index 9525567b1951..c78fc203db43 100644 --- a/include/linux/phy_fixed.h +++ b/include/linux/phy_fixed.h @@ -15,11 +15,9 @@ struct device_node; #if IS_ENABLED(CONFIG_FIXED_PHY) extern int fixed_phy_change_carrier(struct net_device *dev, bool new_carrier); extern int fixed_phy_add(unsigned int irq, int phy_id, - struct fixed_phy_status *status, - int link_gpio); + struct fixed_phy_status *status); extern struct phy_device *fixed_phy_register(unsigned int irq, struct fixed_phy_status *status, - int link_gpio, struct device_node *np); extern void fixed_phy_unregister(struct phy_device *phydev); extern int fixed_phy_set_link_update(struct phy_device *phydev, @@ -27,14 +25,12 @@ extern int fixed_phy_set_link_update(struct phy_device *phydev, struct fixed_phy_status *)); #else static inline int fixed_phy_add(unsigned int irq, int phy_id, - struct fixed_phy_status *status, - int link_gpio) + struct fixed_phy_status *status) { return -ENODEV; } static inline struct phy_device *fixed_phy_register(unsigned int irq, struct fixed_phy_status *status, - int gpio_link, struct device_node *np) { return ERR_PTR(-ENODEV);