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From: Jakub Kicinski <kuba@kernel.org>
To: Dan Murphy <dmurphy@ti.com>
Cc: <davem@davemloft.net>, <andrew@lunn.ch>, <f.fainelli@gmail.com>,
	<hkallweit1@gmail.com>, <netdev@vger.kernel.org>,
	<linux-kernel@vger.kernel.org>
Subject: Re: [PATCH net-next v3 3/3] net: dp83869: Add speed optimization feature
Date: Sat, 5 Sep 2020 11:38:18 -0700	[thread overview]
Message-ID: <20200905113818.7962b6d4@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com> (raw)
In-Reply-To: <20200903114259.14013-4-dmurphy@ti.com>

On Thu, 3 Sep 2020 06:42:59 -0500 Dan Murphy wrote:
> +static int dp83869_set_downshift(struct phy_device *phydev, u8 cnt)
> +{
> +	int val, count;
> +
> +	if (cnt > DP83869_DOWNSHIFT_8_COUNT)
> +		return -E2BIG;

ERANGE

> +	if (!cnt)
> +		return phy_clear_bits(phydev, DP83869_CFG2,
> +				      DP83869_DOWNSHIFT_EN);
> +
> +	switch (cnt) {
> +	case DP83869_DOWNSHIFT_1_COUNT:
> +		count = DP83869_DOWNSHIFT_1_COUNT_VAL;
> +		break;
> +	case DP83869_DOWNSHIFT_2_COUNT:
> +		count = DP83869_DOWNSHIFT_2_COUNT_VAL;
> +		break;
> +	case DP83869_DOWNSHIFT_4_COUNT:
> +		count = DP83869_DOWNSHIFT_4_COUNT_VAL;
> +		break;
> +	case DP83869_DOWNSHIFT_8_COUNT:
> +		count = DP83869_DOWNSHIFT_8_COUNT_VAL;
> +		break;
> +	default:
> +		phydev_err(phydev,
> +			   "Downshift count must be 1, 2, 4 or 8\n");
> +		return -EINVAL;
> +	}
> +
> +	val = DP83869_DOWNSHIFT_EN;
> +	val |= FIELD_PREP(DP83869_DOWNSHIFT_ATTEMPT_MASK, count);
> +
> +	return phy_modify(phydev, DP83869_CFG2,
> +			  DP83869_DOWNSHIFT_EN | DP83869_DOWNSHIFT_ATTEMPT_MASK,
> +			  val);
> +}

  reply	other threads:[~2020-09-05 18:38 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-03 11:42 [PATCH net-next v3 0/3] DP83869 Feature additions Dan Murphy
2020-09-03 11:42 ` [PATCH net-next v3 1/3] net: dp83869: Add ability to advertise Fiber connection Dan Murphy
2020-09-05 18:17   ` Jakub Kicinski
2020-09-07 14:29     ` Andrew Lunn
2020-09-10 17:54       ` Dan Murphy
2020-09-10 18:09         ` Andrew Lunn
2020-09-03 11:42 ` [PATCH net-next v3 2/3] net: phy: dp83869: support Wake on LAN Dan Murphy
2020-09-05 18:34   ` Jakub Kicinski
2020-09-10 17:34     ` Dan Murphy
2020-09-10 18:02       ` Andrew Lunn
2020-09-10 18:21         ` Dan Murphy
2020-09-03 11:42 ` [PATCH net-next v3 3/3] net: dp83869: Add speed optimization feature Dan Murphy
2020-09-05 18:38   ` Jakub Kicinski [this message]
2020-09-08 14:07     ` Dan Murphy
2020-09-08 17:47       ` Jakub Kicinski
2020-09-10 17:34         ` Dan Murphy

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