[{"id":1674838,"web_url":"http://patchwork.ozlabs.org/comment/1674838/","msgid":"","list_archive_url":null,"date":"2017-05-30T19:35:22","subject":"Re: [U-Boot] [PATCH v8 14/17] net: fec_mxc: Add fec_phy_reset\n\tsupport","submitter":{"id":8809,"url":"http://patchwork.ozlabs.org/api/people/8809/","name":"Joe Hershberger","email":"joe.hershberger@ni.com"},"content":"On Tue, May 23, 2017 at 8:33 AM, Jagan Teki wrote:\n> From: Jagan Teki \n>\n> phy-reset-gpios and phy-reset-duration properties are\n> needed for adding mii_dev reset bus operation,\n> so the board code not take care of phy_reset anymore\n> if it use DM_ETH.\n>\n> Cc: Joe Hershberger \n> Cc: Fabio Estevam \n> Signed-off-by: Jagan Teki \n> ---\n> Changes for v8:\n> - Add 'phy-reset-duration' property support\n>\n> drivers/net/fec_mxc.c | 83 ++++++++++++++++++++++++++++++++++++++++++++++-----\n> drivers/net/fec_mxc.h | 9 ++++++\n> include/netdev.h | 5 ++++\n> 3 files changed, 89 insertions(+), 8 deletions(-)\n>\n> diff --git a/drivers/net/fec_mxc.c b/drivers/net/fec_mxc.c\n> index 08bea8b..17fe27f 100644\n> --- a/drivers/net/fec_mxc.c\n> +++ b/drivers/net/fec_mxc.c\n> @@ -180,13 +180,27 @@ static int fec_mdio_write(struct ethernet_regs *eth, uint8_t phyaddr,\n> static int fec_phy_read(struct mii_dev *bus, int phyaddr, int dev_addr,\n> int regaddr)\n> {\n> - return fec_mdio_read(bus->priv, phyaddr, regaddr);\n> +#ifdef CONFIG_DM_ETH\n> + struct fec_priv *priv = dev_get_priv((struct udevice *)bus->priv);\n> + struct ethernet_regs *eth = priv->eth;\n> +#else\n> + struct ethernet_regs *eth = bus->priv;\n> +#endif\n> +\n> + return fec_mdio_read(eth, phyaddr, regaddr);\n> }\n>\n> static int fec_phy_write(struct mii_dev *bus, int phyaddr, int dev_addr,\n> int regaddr, u16 data)\n> {\n> - return fec_mdio_write(bus->priv, phyaddr, regaddr, data);\n> +#ifdef CONFIG_DM_ETH\n> + struct fec_priv *priv = dev_get_priv((struct udevice *)bus->priv);\n> + struct ethernet_regs *eth = priv->eth;\n> +#else\n> + struct ethernet_regs *eth = bus->priv;\n> +#endif\n> +\n> + return fec_mdio_write(eth, phyaddr, regaddr, data);\n> }\n>\n> #ifndef CONFIG_PHYLIB\n> @@ -985,9 +999,44 @@ static void fec_free_descs(struct fec_priv *fec)\n> free(fec->tbd_base);\n> }\n>\n> +#if defined(CONFIG_DM_ETH) && defined(CONFIG_DM_GPIO)\n> +static int fec_phy_reset(struct mii_dev *bus)\n> +{\n> + struct fec_priv *priv = dev_get_priv((struct udevice *)bus->priv);\n> + int ret;\n> +\n> + if (!dm_gpio_is_valid(&priv->reset_gpio))\n> + return 0;\n> +\n> + /* phy reset */\n> + ret = dm_gpio_set_value(&priv->reset_gpio, 0);\n> + if (ret)\n> + return ret;\n> +\n> + mdelay(priv->reset_duration);\n> +\n> + ret = dm_gpio_set_value(&priv->reset_gpio, 1);\n> + if (ret)\n> + return ret;\n> +\n> + mdelay(priv->reset_duration);\n> +\n> + return 0;\n> +}\n> +#endif\n> +\n> +#ifdef CONFIG_DM_ETH\n> +struct mii_dev *fec_get_miibus(struct udevice *dev, int dev_id)\n> +#else\n> struct mii_dev *fec_get_miibus(uint32_t base_addr, int dev_id)\n> +#endif\n> {\n> +#ifdef CONFIG_DM_ETH\n> + struct fec_priv *priv = dev_get_priv(dev);\n> + struct ethernet_regs *eth = priv->eth;\n> +#else\n> struct ethernet_regs *eth = (struct ethernet_regs *)base_addr;\n> +#endif\n> struct mii_dev *bus;\n> int ret;\n>\n> @@ -998,7 +1047,14 @@ struct mii_dev *fec_get_miibus(uint32_t base_addr, int dev_id)\n> }\n> bus->read = fec_phy_read;\n> bus->write = fec_phy_write;\n> +#ifdef CONFIG_DM_ETH\n> + bus->priv = dev;\n> +# ifdef CONFIG_DM_GPIO\n> + bus->reset = fec_phy_reset;\n> +# endif\n> +#else\n> bus->priv = eth;\n> +#endif\n> fec_set_dev_name(bus->name, dev_id);\n>\n> ret = mdio_register(bus);\n> @@ -1223,7 +1279,7 @@ static int fecmxc_probe(struct udevice *dev)\n> if (ret)\n> return ret;\n>\n> - bus = fec_get_miibus((uint32_t)priv->eth, dev_id);\n> + bus = fec_get_miibus(dev, dev_id);\n> if (!bus)\n> goto err_mii;\n>\n> @@ -1278,6 +1334,7 @@ static int fecmxc_ofdata_to_platdata(struct udevice *dev)\n> struct eth_pdata *pdata = dev_get_platdata(dev);\n> struct fec_priv *priv = dev_get_priv(dev);\n> const char *phy_mode;\n> + int ret = 0;\n>\n> pdata->iobase = (phys_addr_t)dev_get_addr(dev);\n> priv->eth = (struct ethernet_regs *)pdata->iobase;\n> @@ -1292,12 +1349,22 @@ static int fecmxc_ofdata_to_platdata(struct udevice *dev)\n> return -EINVAL;\n> }\n>\n> - /* TODO\n> - * Need to get the reset-gpio and related properties from DT\n> - * and implemet the enet reset code on .probe call\n> - */\n> +#ifdef CONFIG_DM_GPIO\n> + /* phy reset gpio */\n> + ret = gpio_request_by_name(dev, \"phy-reset-gpios\", 0,\n> + &priv->reset_gpio, GPIOD_IS_OUT);\n> + if (ret == 0) {\n> + priv->reset_duration = fdtdec_get_int(gd->fdt_blob,\n> + dev_of_offset(dev),\n> + \"phy-reset-duration\", 1);\n\nSeems like\n\n> + /* A sane reset duration should not be longer than 1s */\n> + if (priv->reset_duration > 1000)\n> + priv->reset_duration = 1;\n\nIt seems odd to set it to 1 ms if the requested was too long. Maybe it\nshould just be priv->reset_duration = MIN(priv->reset_duration, 1000);\n?\n\nAlso, should the member variable have \"_ms\" at the end to make the units clear?\n\n> + ret = 0;\n> + }\n> +#endif\n>\n> - return 0;\n> + return ret;\n> }\n>\n> static const struct udevice_id fecmxc_ids[] = {\n> diff --git a/drivers/net/fec_mxc.h b/drivers/net/fec_mxc.h\n> index 43a7d7b..fd51d6d 100644\n> --- a/drivers/net/fec_mxc.h\n> +++ b/drivers/net/fec_mxc.h\n> @@ -17,6 +17,10 @@\n> #ifndef __FEC_MXC_H\n> #define __FEC_MXC_H\n>\n> +#ifdef CONFIG_DM_GPIO\n> +# include \n> +#endif\n> +\n> /* Layout description of the FEC */\n> struct ethernet_regs {\n> /* [10:2]addr = 00 */\n> @@ -254,6 +258,11 @@ struct fec_priv {\n>\n> #ifdef CONFIG_DM_ETH\n> u32 interface;\n> +\n> +# ifdef CONFIG_DM_GPIO\n> + struct gpio_desc reset_gpio;\n> + u32 reset_duration;\n> +# endif\n> #endif\n> };\n>\n> diff --git a/include/netdev.h b/include/netdev.h\n> index 8eb8b46..e5668f4 100644\n> --- a/include/netdev.h\n> +++ b/include/netdev.h\n> @@ -133,7 +133,12 @@ static inline int pci_eth_init(bd_t *bis)\n> return num;\n> }\n>\n> +#ifdef CONFIG_DM_ETH\n> +struct mii_dev *fec_get_miibus(struct udevice *dev, int dev_id);\n> +#else\n> struct mii_dev *fec_get_miibus(uint32_t base_addr, int dev_id);\n> +#endif\n> +\n> #ifdef CONFIG_PHYLIB\n> struct phy_device;\n> int fec_probe(bd_t *bd, int dev_id, uint32_t base_addr,\n> --\n> 2.7.4\n>\n> _______________________________________________\n> U-Boot mailing list\n> U-Boot@lists.denx.de\n> https://lists.denx.de/listinfo/u-boot","headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@bilbo.ozlabs.org","Received":["from lists.denx.de (dione.denx.de [81.169.180.215])\n\tby ozlabs.org (Postfix) with ESMTP id 3wckP132Mzz9s72\n\tfor ;\n\tWed, 31 May 2017 05:36:04 +1000 (AEST)","by lists.denx.de (Postfix, from userid 105)\n\tid 450D3C21C68; Tue, 30 May 2017 19:36:00 +0000 (UTC)","from lists.denx.de (localhost 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