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net: phy: dp83869: fix default value for tx-/rx-internal-delay

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commit 82e2c39f9ef78896e9b634dfd82dc042e6956bb7 upstream.

dp83869 internally uses a look-up table for mapping supported delays in
nanoseconds to register values.
When specific delays are defined in device-tree, phy_get_internal_delay
does the lookup automatically returning an index.

The default case wrongly assigns the nanoseconds value from the lookup
table, resulting in numeric value 2000 applied to delay configuration
register, rather than the expected index values 0-7 (7 for 2000).
Ultimately this issue broke RX for 1Gbps links.

Fix default delay configuration by assigning the intended index value
directly.

Cc: stable@vger.kernel.org
Fixes: 736b25afe2 ("net: dp83869: Add RGMII internal delay configuration")
Co-developed-by: Yazan Shhady <yazan.shhady@solid-run.com>
Signed-off-by: Yazan Shhady <yazan.shhady@solid-run.com>
Signed-off-by: Josua Mayer <josua@solid-run.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Link: https://lore.kernel.org/r/20230323102536.31988-1-josua@solid-run.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Josua Mayer
2023-03-23 12:25:36 +02:00
committed by Greg Kroah-Hartman
parent b3d7a4478c
commit fbf3fe7f7b
1 changed files with 2 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/net/phy/dp83869.c
View File

@@ -553,15 +553,13 @@ static int dp83869_of_init(struct phy_device *phydev)
&dp83869_internal_delay[0],
delay_size, true);
if (dp83869->rx_int_delay < 0)
dp83869->rx_int_delay =
dp83869_internal_delay[DP83869_CLK_DELAY_DEF];
dp83869->rx_int_delay = DP83869_CLK_DELAY_DEF;
dp83869->tx_int_delay = phy_get_internal_delay(phydev, dev,
&dp83869_internal_delay[0],
delay_size, false);
if (dp83869->tx_int_delay < 0)
dp83869->tx_int_delay =
dp83869_internal_delay[DP83869_CLK_DELAY_DEF];
dp83869->tx_int_delay = DP83869_CLK_DELAY_DEF;
return ret;
}