From mboxrd@z Thu Jan 1 00:00:00 1970 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Subject: [RFC,net-next] net: fixed_phy: Move the DT based link GPIO parsing to of_mdio.c From: Florian Fainelli Message-Id: Date: Wed, 6 Feb 2019 14:41:27 -0800 To: Moritz Fischer , Andrew Lunn Cc: linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, netdev@vger.kernel.org, colin.king@canonical.com, linus.walleij@linaro.org, yuehaibing@huawei.com, mcgrof@kernel.org, frowand.list@gmail.com, robh+dt@kernel.org, UNGLinuxDriver@microchip.com, woojung.huh@microchip.com, hkallweit1@gmail.com, davem@davemloft.net, vivien.didelot@gmail.com, moritz@ettus.com, alex.williams@ni.com List-ID: T24gMi82LzE5IDI6MzggUE0sIE1vcml0eiBGaXNjaGVyIHdyb3RlOgo+IEhpIEFuZHJldywKPiAK PiB0aGFua3MgZm9yIHlvdXIgZmVlZGJhY2suCj4gCj4gT24gV2VkLCBGZWIgMDYsIDIwMTkgYXQg MTA6NTM6MjJQTSArMDEwMCwgQW5kcmV3IEx1bm4gd3JvdGU6Cj4+IE9uIFdlZCwgRmViIDA2LCAy 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colin.king@canonical.com, linus.walleij@linaro.org, yuehaibing@huawei.com, mcgrof@kernel.org, frowand.list@gmail.com, robh+dt@kernel.org, UNGLinuxDriver@microchip.com, woojung.huh@microchip.com, hkallweit1@gmail.com, davem@davemloft.net, vivien.didelot@gmail.com, moritz@ettus.com, alex.williams@ni.com References: <20190206205106.11517-1-mdf@kernel.org> <20190206215322.GC32483@lunn.ch> <20190206223846.GA22321@archbook> From: Florian Fainelli Openpgp: preference=signencrypt Autocrypt: addr=f.fainelli@gmail.com; prefer-encrypt=mutual; keydata= mQGiBEjPuBIRBACW9MxSJU9fvEOCTnRNqG/13rAGsj+vJqontvoDSNxRgmafP8d3nesnqPyR xGlkaOSDuu09rxuW+69Y2f1TzjFuGpBk4ysWOR85O2Nx8AJ6fYGCoeTbovrNlGT1M9obSFGQ X3IzRnWoqlfudjTO5TKoqkbOgpYqIo5n1QbEjCCwCwCg3DOH/4ug2AUUlcIT9/l3pGvoRJ0E AICDzi3l7pmC5IWn2n1mvP5247urtHFs/uusE827DDj3K8Upn2vYiOFMBhGsxAk6YKV6IP0d ZdWX6fqkJJlu9cSDvWtO1hXeHIfQIE/xcqvlRH783KrihLcsmnBqOiS6rJDO2x1eAgC8meAX SAgsrBhcgGl2Rl5gh/jkeA5ykwbxA/9u1eEuL70Qzt5APJmqVXR+kWvrqdBVPoUNy/tQ8mYc 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2MW2rWf+CO9kbIR+66j8b4RUJqIK3dWn9xbENh/aqxfonGTCZQ2zC4sLd25DQA4w1itPo+f5 V/SQxuhnlQkTOCdJ7b/mby/pNRz1lsLkjnXueLILj7gNjwTabZXYtL16z24qkDTI1x3g98R/ xunb3/fQwR8FY5/zRvXJq5us/nLvIvOmVwZFkwXc+AF+LSIajqQz9XbXeIP/BDjlBNXRZNdo dVuSU51ENcMcilPr2EUnqEAqeczsCGpnvRCLfVQeSZr2L9N4svNhhfPOEscYhhpHTh0VPyxI pPBNKq+byuYPMyk3nj814NKhImK0O4gTyCK9b+gZAVvQcYAXvSouCnTZeJRrNHJFTgTgu6E0 caxTGgc5zzQHeX67eMzrGomG3ZnIxmd1sAbgvJUDaD2GrYlulfwGWwWyTNbWRvMighVdPkSF 6XFgQaosWxkV0OELLy2N485YrTr2Uq64VKyxpncLh50e2RnyAJ9Za0Dx0yyp44iD1OvHtkEI M5kY0ACeNhCZJvZ5g4C2Lc9fcTHu8jxmEkI= Message-ID: Date: Wed, 6 Feb 2019 14:41:27 -0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.4.0 MIME-Version: 1.0 In-Reply-To: <20190206223846.GA22321@archbook> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2/6/19 2:38 PM, Moritz Fischer wrote: > Hi Andrew, > > thanks for your feedback. > > On Wed, Feb 06, 2019 at 10:53:22PM +0100, Andrew Lunn wrote: >> On Wed, Feb 06, 2019 at 12:51:06PM -0800, Moritz Fischer wrote: >>> Move the DT based link GPIO parsing to of_mdio and let the places >>> that register a fixed_phy pass in a GPIO descriptor or NULL. >>> >>> This allows fixed_phy on non-DT platforms to have link GPIOs, too. >>> >>> Signed-off-by: Moritz Fischer >>> --- >>> 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 | 48 ++------------------ >>> drivers/net/usb/lan78xx.c | 2 +- >>> drivers/of/of_mdio.c | 15 +++++- >>> include/linux/phy_fixed.h | 3 +- >>> 7 files changed, 23 insertions(+), 51 deletions(-) >>> >>> diff --git a/drivers/net/dsa/dsa_loop.c b/drivers/net/dsa/dsa_loop.c >>> index 17482ae09aa5..7f124c620092 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, NULL); >>> + phydevs[i] = fixed_phy_register(PHY_POLL, &status, NULL, 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 4632dd5dbad1..bce644dec5c2 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, NULL); >>> + phy_dev = fixed_phy_register(PHY_POLL, &fphy_status, NULL, 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 51880d83131a..7cbd737aba80 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, NULL); >>> + phydev = fixed_phy_register(PHY_POLL, &fphy_status, NULL, 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 d810f914aaa4..845bd7c2065a 100644 >>> --- a/drivers/net/phy/fixed_phy.c >>> +++ b/drivers/net/phy/fixed_phy.c >>> @@ -18,6 +18,7 @@ >>> #include >>> #include >>> #include >>> +#include >>> #include >>> #include >>> #include >>> @@ -191,50 +192,12 @@ 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 obtain >>> - * 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)) { >>> - if (PTR_ERR(gpiod) == -EPROBE_DEFER) >>> - return gpiod; >>> - pr_err("error getting GPIO for fixed link %pOF, proceed without\n", >>> - fixed_link_node); >>> - 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, >>> - struct device_node *np) >>> + struct device_node *np, >>> + struct gpio_desc *gpiod) >>> { >>> struct fixed_mdio_bus *fmb = &platform_fmb; >>> - struct gpio_desc *gpiod = NULL; >>> struct phy_device *phy; >>> int phy_addr; >>> int ret; >>> @@ -242,11 +205,6 @@ struct phy_device *fixed_phy_register(unsigned int irq, >>> 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) >>> diff --git a/drivers/net/usb/lan78xx.c b/drivers/net/usb/lan78xx.c >>> index 3d92ea6fcc02..bd88f0aef2fa 100644 >>> --- a/drivers/net/usb/lan78xx.c >>> +++ b/drivers/net/usb/lan78xx.c >>> @@ -2051,7 +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, NULL); >>> + phydev = fixed_phy_register(PHY_POLL, &fphy_status, NULL, 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 de6157357e26..6be2120b5f03 100644 >>> --- a/drivers/of/of_mdio.c >>> +++ b/drivers/of/of_mdio.c >>> @@ -20,6 +20,7 @@ >>> #include >>> #include >>> #include >>> +#include >>> >>> #define DEFAULT_GPIO_RESET_DELAY 10 /* in microseconds */ >>> >>> @@ -460,6 +461,7 @@ int of_phy_register_fixed_link(struct device_node *np) >>> { >>> struct fixed_phy_status status = {}; >>> struct device_node *fixed_link_node; >>> + struct gpio_desc *gpiod = NULL; >>> u32 fixed_link_prop[5]; >>> const char *managed; >>> >>> @@ -483,7 +485,17 @@ 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"); >>> + >>> + 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)) { >>> + if (PTR_ERR(gpiod) == -EPROBE_DEFER) >>> + return PTR_ERR(gpiod); >>> + pr_err("error getting GPIO for fixed link %pOF, proceed without\n", >>> + fixed_link_node); >>> + gpiod = NULL; >>> extern struct phy_device *fixed_phy_register(unsigned int irq, >>> struct fixed_phy_status *status, >>> - struct device_node *np); >>> + struct device_node *np, >>> + struct gpio_desc *gpiod); >> >> Hi Moritz >> >> I think it would be better to add a >> >> extern struct phy_device *fixed_phy_register_gpiod(unsigned int irq, >> struct fixed_phy_status *status, >> struct gpio_desc *gpiod); >> >> If you are not using DT, the np is pointless. So lets keep the API >> simple. > > To clarify: Do you agree with moving the parsing to of_mdio, or do you > want to keep the parsing as it was and just add an additional function. > > In the latter case you'd have a > static struct phy_device *__fixed_phy_register(unsigned int irq, > struct fixed_phy_status *status, > struct device_node *np, > struct gpio_desc *gpiod) > { > if (gpiod) > use that > else > old behavior / scan dt? > } > > That we then call from fixed_phy_register_gpiod() with a np of NULL, > and from fixed_phy_register() with a gpiod of NULL? If you have existing users in tree, of something like: foo(a, b, c) and you want to introduce a "d" argument, it's a good practice to do: foo(a, b, c) -> __foo(a, b, c, 0) foo_with_d(a, b, c, d) __foo(a, b, c, d) and have the body of foo() become __foo() while taking the new argument. Hope this is clear. -- Florian