netdev - Re: [PATCH V1 net-next 3/5] net: fec: add imx8mq and imx8qm new versions support

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Date:   Wed, 14 Jul 2021 17:18:44 -0600
From:   Rob Herring <robh@...nel.org>
To:     Joakim Zhang <qiangqing.zhang@....com>
Cc:     davem@...emloft.net, kuba@...nel.org, andrew@...n.ch,
        netdev@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-imx@....com
Subject: Re: [PATCH V1 net-next 3/5] net: fec: add imx8mq and imx8qm new
 versions support

On Fri, Jul 09, 2021 at 04:18:21PM +0800, Joakim Zhang wrote:
> From: Fugang Duan <fugang.duan@....com>
> 
> The ENET of imx8mq and imx8qm are basically the same as imx6sx,
> but they have new features support based on imx6sx, like:
> - imx8mq: supports IEEE 802.3az EEE standard.
> - imx8qm: supports RGMII mode delayed clock.
> 
> Signed-off-by: Fugang Duan <fugang.duan@....com>
> Signed-off-by: Joakim Zhang <qiangqing.zhang@....com>
> ---
>  drivers/net/ethernet/freescale/fec.h      | 13 ++++++++++
>  drivers/net/ethernet/freescale/fec_main.c | 30 +++++++++++++++++++++++
>  2 files changed, 43 insertions(+)
> 
> diff --git a/drivers/net/ethernet/freescale/fec.h b/drivers/net/ethernet/freescale/fec.h
> index 2e002e4b4b4a..c1f93aa79d63 100644
> --- a/drivers/net/ethernet/freescale/fec.h
> +++ b/drivers/net/ethernet/freescale/fec.h
> @@ -472,6 +472,19 @@ struct bufdesc_ex {
>   */
>  #define FEC_QUIRK_HAS_MULTI_QUEUES	(1 << 19)
>  
> +/* i.MX8MQ ENET IP version add new feature to support IEEE 802.3az EEE
> + * standard. For the transmission, MAC supply two user registers to set
> + * Sleep (TS) and Wake (TW) time.
> + */
> +#define FEC_QUIRK_HAS_EEE		(1 << 20)
> +
> +/* i.MX8QM ENET IP version add new feture to generate delayed TXC/RXC
> + * as an alternative option to make sure it works well with various PHYs.
> + * For the implementation of delayed clock, ENET takes synchronized 250MHz
> + * clocks to generate 2ns delay.
> + */
> +#define FEC_QUIRK_DELAYED_CLKS_SUPPORT	(1 << 21)
> +
>  struct bufdesc_prop {
>  	int qid;
>  	/* Address of Rx and Tx buffers */
> diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c
> index 8aea707a65a7..dd0b8715e84e 100644
> --- a/drivers/net/ethernet/freescale/fec_main.c
> +++ b/drivers/net/ethernet/freescale/fec_main.c
> @@ -135,6 +135,26 @@ static const struct fec_devinfo fec_imx6ul_info = {
>  		  FEC_QUIRK_HAS_COALESCE | FEC_QUIRK_CLEAR_SETUP_MII,
>  };
>  
> +static const struct fec_devinfo fec_imx8mq_info = {
> +	.quirks = FEC_QUIRK_ENET_MAC | FEC_QUIRK_HAS_GBIT |
> +		  FEC_QUIRK_HAS_BUFDESC_EX | FEC_QUIRK_HAS_CSUM |
> +		  FEC_QUIRK_HAS_VLAN | FEC_QUIRK_HAS_AVB |
> +		  FEC_QUIRK_ERR007885 | FEC_QUIRK_BUG_CAPTURE |
> +		  FEC_QUIRK_HAS_RACC | FEC_QUIRK_HAS_COALESCE |
> +		  FEC_QUIRK_CLEAR_SETUP_MII | FEC_QUIRK_HAS_MULTI_QUEUES |
> +		  FEC_QUIRK_HAS_EEE,
> +};
> +
> +static const struct fec_devinfo fec_imx8qm_info = {
> +	.quirks = FEC_QUIRK_ENET_MAC | FEC_QUIRK_HAS_GBIT |
> +		  FEC_QUIRK_HAS_BUFDESC_EX | FEC_QUIRK_HAS_CSUM |
> +		  FEC_QUIRK_HAS_VLAN | FEC_QUIRK_HAS_AVB |
> +		  FEC_QUIRK_ERR007885 | FEC_QUIRK_BUG_CAPTURE |
> +		  FEC_QUIRK_HAS_RACC | FEC_QUIRK_HAS_COALESCE |
> +		  FEC_QUIRK_CLEAR_SETUP_MII | FEC_QUIRK_HAS_MULTI_QUEUES |
> +		  FEC_QUIRK_DELAYED_CLKS_SUPPORT,
> +};
> +
>  static struct platform_device_id fec_devtype[] = {
>  	{
>  		/* keep it for coldfire */
> @@ -161,6 +181,12 @@ static struct platform_device_id fec_devtype[] = {
>  	}, {
>  		.name = "imx6ul-fec",
>  		.driver_data = (kernel_ulong_t)&fec_imx6ul_info,
> +	}, {
> +		.name = "imx8mq-fec",
> +		.driver_data = (kernel_ulong_t)&fec_imx8mq_info,
> +	}, {
> +		.name = "imx8qm-fec",
> +		.driver_data = (kernel_ulong_t)&fec_imx8qm_info,
>  	}, {
>  		/* sentinel */
>  	}
> @@ -175,6 +201,8 @@ enum imx_fec_type {
>  	MVF600_FEC,
>  	IMX6SX_FEC,
>  	IMX6UL_FEC,
> +	IMX8MQ_FEC,
> +	IMX8QM_FEC,
>  };
>  
>  static const struct of_device_id fec_dt_ids[] = {
> @@ -185,6 +213,8 @@ static const struct of_device_id fec_dt_ids[] = {
>  	{ .compatible = "fsl,mvf600-fec", .data = &fec_devtype[MVF600_FEC], },
>  	{ .compatible = "fsl,imx6sx-fec", .data = &fec_devtype[IMX6SX_FEC], },
>  	{ .compatible = "fsl,imx6ul-fec", .data = &fec_devtype[IMX6UL_FEC], },
> +	{ .compatible = "fsl,imx8mq-fec", .data = &fec_devtype[IMX8MQ_FEC], },
> +	{ .compatible = "fsl,imx8qm-fec", .data = &fec_devtype[IMX8QM_FEC], },

I don't think these are documented.

Rob