linux-kernel - Re: [PATCH 2/2] net: phy: micrel: Restore led_mode and clk

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Message-ID: <44ddeaeb-3e23-3d88-cc5c-9ed290507648@gmail.com>
Date:   Tue, 30 May 2017 11:05:19 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Leonard Crestez <leonard.crestez@....com>,
        Shawn Guo <shawnguo@...nel.org>, Andrew Lunn <andrew@...n.ch>,
        Andy Duan <fugang.duan@....com>
Cc:     Johan Hovold <johan@...nel.org>,
        Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Fabio Estevam <fabio.estevam@....com>, netdev@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] net: phy: micrel: Restore led_mode and clk_sel on
 resume

On 05/30/2017 10:34 AM, Leonard Crestez wrote:
> These bits seem to be lost after a suspend/resume cycle so just set them
> again.
> 
> This patch fixes ethernet suspend/resume on imx6ul-14x14-evk boards.
> 
> Signed-off-by: Leonard Crestez <leonard.crestez@....com>
> ---
>  drivers/net/phy/micrel.c | 15 +++++++++++++++
>  1 file changed, 15 insertions(+)
> 
> diff --git a/drivers/net/phy/micrel.c b/drivers/net/phy/micrel.c
> index 6a5fd18..c53ee17 100644
> --- a/drivers/net/phy/micrel.c
> +++ b/drivers/net/phy/micrel.c
> @@ -700,6 +700,9 @@ static int kszphy_suspend(struct phy_device *phydev)
>  
>  static int kszphy_resume(struct phy_device *phydev)
>  {
> +	struct kszphy_priv *priv = phydev->priv;
> +	int ret;
> +
>  	genphy_resume(phydev);
>  
>  	/* Enable PHY Interrupts */
> @@ -709,6 +712,18 @@ static int kszphy_resume(struct phy_device *phydev)
>  			phydev->drv->config_intr(phydev);
>  	}
>  
> +	if (priv->rmii_ref_clk_sel) {
> +		ret = kszphy_rmii_clk_sel(phydev, priv->rmii_ref_clk_sel_val);
> +		if (ret) {
> +			phydev_err(phydev,
> +				   "failed to set rmii reference clock\n");
> +			return ret;
> +		}
> +	}
> +
> +	if (priv->led_mode >= 0)
> +		kszphy_setup_led(phydev, priv->type->led_mode_reg, priv->led_mode);

Should not we actually call kszphy_config_init() in order to restore
broadcast and nand disable bits as well?

If not, I would be more comfortable if we did create a specific function
that takes care of setting the reference clock and LED mode.

Other than that, LGTM!
-- 
Florian