linux-kernel - Re: [Patch net-next v6 12/13] net: dsa: microchip: ptp: lan937x: add 2 step timestamping

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Date:   Tue, 3 Jan 2023 19:47:09 +0200
From:   Vladimir Oltean <olteanv@...il.com>
To:     Arun Ramadoss <arun.ramadoss@...rochip.com>
Cc:     linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        woojung.huh@...rochip.com, UNGLinuxDriver@...rochip.com,
        andrew@...n.ch, vivien.didelot@...il.com, f.fainelli@...il.com,
        davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, linux@...linux.org.uk,
        Tristram.Ha@...rochip.com, richardcochran@...il.com,
        ceggers@...i.de, jacob.e.keller@...el.com
Subject: Re: [Patch net-next v6 12/13] net: dsa: microchip: ptp: lan937x: add
 2 step timestamping

On Mon, Jan 02, 2023 at 10:34:58AM +0530, Arun Ramadoss wrote:
> ---
>  drivers/net/dsa/microchip/ksz_ptp.c | 37 ++++++++++++++++++++++++++++-
>  1 file changed, 36 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/net/dsa/microchip/ksz_ptp.c b/drivers/net/dsa/microchip/ksz_ptp.c
> index 2d52a3d4771e..c2d156002ee5 100644
> --- a/drivers/net/dsa/microchip/ksz_ptp.c
> +++ b/drivers/net/dsa/microchip/ksz_ptp.c
> @@ -283,6 +283,9 @@ int ksz_get_ts_info(struct dsa_switch *ds, int port, struct ethtool_ts_info *ts)
>  
>  	ts->tx_types = BIT(HWTSTAMP_TX_OFF) | BIT(HWTSTAMP_TX_ONESTEP_P2P);
>  
> +	if (is_lan937x(dev))
> +		ts->tx_types |= BIT(HWTSTAMP_TX_ON);
> +
>  	ts->rx_filters = BIT(HWTSTAMP_FILTER_NONE) |
>  			 BIT(HWTSTAMP_FILTER_PTP_V2_L4_EVENT) |
>  			 BIT(HWTSTAMP_FILTER_PTP_V2_L2_EVENT) |
> @@ -310,6 +313,8 @@ static int ksz_set_hwtstamp_config(struct ksz_device *dev,
>  				   struct ksz_port *prt,
>  				   struct hwtstamp_config *config)
>  {
> +	int ret;
> +
>  	if (config->flags)
>  		return -EINVAL;
>  
> @@ -325,6 +330,25 @@ static int ksz_set_hwtstamp_config(struct ksz_device *dev,
>  		prt->ptpmsg_irq[KSZ_XDREQ_MSG].ts_en = 1;
>  		prt->ptpmsg_irq[KSZ_PDRES_MSG].ts_en = 0;
>  		prt->hwts_tx_en = true;
> +
> +		ret = ksz_rmw16(dev, REG_PTP_MSG_CONF1, PTP_1STEP, PTP_1STEP);
> +		if (ret)
> +			return ret;
> +
> +		break;
> +	case HWTSTAMP_TX_ON:
> +		if (!is_lan937x(dev))
> +			return -ERANGE;
> +
> +		prt->ptpmsg_irq[KSZ_SYNC_MSG].ts_en  = 1;
> +		prt->ptpmsg_irq[KSZ_XDREQ_MSG].ts_en = 1;
> +		prt->ptpmsg_irq[KSZ_PDRES_MSG].ts_en = 1;

s/1/true/ please

> +		prt->hwts_tx_en = true;
> +
> +		ret = ksz_rmw16(dev, REG_PTP_MSG_CONF1, PTP_1STEP, 0);
> +		if (ret)
> +			return ret;
> +
>  		break;
>  	default:
>  		return -ERANGE;