linux-kernel - Re: [PATCH v4 net-next 4/6] net: ethernet: ti: am65-cpsw: Add suspend/resume support

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Message-ID: <9fdc4e0eee7ead18c119b6bc3e93f7f73d2980cd.camel@redhat.com>
Date:   Thu, 01 Dec 2022 12:40:51 +0100
From:   Paolo Abeni <pabeni@...hat.com>
To:     Roger Quadros <rogerq@...nel.org>, davem@...emloft.net,
        maciej.fijalkowski@...el.com, kuba@...nel.org
Cc:     andrew@...n.ch, edumazet@...gle.com, vigneshr@...com,
        linux-omap@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 net-next 4/6] net: ethernet: ti: am65-cpsw: Add
 suspend/resume support

On Tue, 2022-11-29 at 15:34 +0200, Roger Quadros wrote:
> @@ -555,11 +556,26 @@ static int am65_cpsw_nuss_ndo_slave_open(struct net_device *ndev)
>  	struct am65_cpsw_common *common = am65_ndev_to_common(ndev);
>  	struct am65_cpsw_port *port = am65_ndev_to_port(ndev);
>  	int ret, i;
> +	u32 reg;
>  
>  	ret = pm_runtime_resume_and_get(common->dev);
>  	if (ret < 0)
>  		return ret;
>  
> +	/* Idle MAC port */
> +	cpsw_sl_ctl_set(port->slave.mac_sl, CPSW_SL_CTL_CMD_IDLE);
> +	cpsw_sl_wait_for_idle(port->slave.mac_sl, 100);
> +	cpsw_sl_ctl_reset(port->slave.mac_sl);
> +
> +	/* soft reset MAC */
> +	cpsw_sl_reg_write(port->slave.mac_sl, CPSW_SL_SOFT_RESET, 1);
> +	mdelay(1);
> +	reg = cpsw_sl_reg_read(port->slave.mac_sl, CPSW_SL_SOFT_RESET);
> +	if (reg) {
> +		dev_err(common->dev, "soft RESET didn't complete\n");

I *think* Andrew was asking for dev_dbg() here, but let's see what he
has to say :)

Cheers,

Paolo