Hi Madalin,
> -----Original Message-----
> From: Bhaskar Upadhaya
> Sent: Tuesday, November 28, 2017 12:57 PM
> To: Madalin-cristian Bucur <madalin.bu...@nxp.com>; Andrew Lunn
> <and...@lunn.ch>; f.faine...@gmail.com; netdev@vger.kernel.org; Anji
> Jagarlmudi <anji.jagarlm...@nxp.com>; Calvin Johnson
> <calvin.john...@nxp.com>; Prabhakar Kushwaha
> <prabhakar.kushw...@nxp.com>; Poonam Aggrwal
> <poonam.aggr...@nxp.com>
> Cc: Shengzhou Liu <shengzhou....@nxp.com>; York Sun <york....@nxp.com>; u-
> b...@lists.denx.de
> Subject: RE: [RFC] Support for SGMII 2500
>
> + Anji, Calvin, Prabhakar, Poonam.
>
> -----Original Message-----
> From: Madalin-cristian Bucur
> Sent: Tuesday, November 28, 2017 12:56 PM
> To: Andrew Lunn <and...@lunn.ch>; f.faine...@gmail.com;
> netdev@vger.kernel.org
> Cc: Bhaskar Upadhaya <bhaskar.upadh...@nxp.com>; Shengzhou Liu
> <shengzhou....@nxp.com>; York Sun <york....@nxp.com>; u-
> b...@lists.denx.de
> Subject: [RFC] Support for SGMII 2500
>
> Hi,
>
> There is a disconnect between the SGMII 2500 support in u-boot and Linux.
> Bhaskar is trying to add support for a SGMII interface working at 2.5Gbps by
> using the PHY connection type "sgmii-2500" in the device tree:
>
> phy-connection-type = "sgmii-2500";
>
> This is supported by u-boot, in include/phy.h:
>
> typedef enum {
> PHY_INTERFACE_MODE_MII,
> PHY_INTERFACE_MODE_GMII,
> PHY_INTERFACE_MODE_SGMII,
> PHY_INTERFACE_MODE_SGMII_2500,
> ...
>
> static const char *phy_interface_strings[] = {
> [PHY_INTERFACE_MODE_MII] = "mii",
> [PHY_INTERFACE_MODE_GMII] = "gmii",
> [PHY_INTERFACE_MODE_SGMII] = "sgmii",
> [PHY_INTERFACE_MODE_SGMII_2500] = "sgmii-2500",
> ...
>
> since this commit:
>
> commit c35f8693942d8284c635592f263a0fe11abe1d1d
> Author: Shengzhou Liu <shengzhou....@freescale.com>
> Date: Thu Oct 23 17:20:57 2014 +0800
>
> net/fm: add 2.5G SGMII support
>
> As auto-negotiation is not supported for 2.5G SGMII, we need
> to add a new type PHY_INTERFACE_MODE_SGMII_2500 to
> differentiate
> SGMII-1G and SGMII-2.5G with different setting for auto-negotiation.
>
> Signed-off-by: Shaohui Xie <shaohui....@freescale.com>
> Signed-off-by: Shengzhou Liu <shengzhou....@freescale.com>
> Reviewed-by: York Sun <york...@freescale.com>
>
> In the Linux kernel we do not have a separate define for SGMII_2500, should we
> add something like the change below?
>
If there is no separate define in Linux. Than how it deals with
auto-negotiation.
Can same approach be used in u-boot?
--pk
