[PATCH net-next v2 0/1] net: phy: dp83867 non-OF and loopback support

Changes in v2:

 * drop "net: phy: dp83867: add generic PHY loopback" patch as not relevant.
   Thanks Vee Khee for pointing out.
 * Fix dictionary spell check error detected and length issue detected.

Thanks
Boon Leong

Lay, Kuan Loon (1):
  net: phy: dp83867: introduce critical chip default init for non-of
    platform

 drivers/net/phy/dp83867.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

-- 
2.25.1

From: "Lay, Kuan Loon" <redacted>

PHY driver dp83867 has rich supports for OF-platform to fine-tune the PHY
chip during phy configuration. However, for non-OF platform, certain PHY
tunable parameters such as IO impedance and RX & TX internal delays are
critical and should be initialized to its default during PHY driver probe.

Tested-by: Clement <redacted>
Signed-off-by: Lay, Kuan Loon <redacted>
Co-developed-by: Ong Boon Leong <redacted>
Signed-off-by: Ong Boon Leong <redacted>
---
 drivers/net/phy/dp83867.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/drivers/net/phy/dp83867.c b/drivers/net/phy/dp83867.c
index 6bbc81ad295f..914619f3f0e3 100644
--- a/drivers/net/phy/dp83867.c
+++ b/drivers/net/phy/dp83867.c

@@ -619,6 +619,25 @@ static int dp83867_of_init(struct phy_device *phydev)
 #else
 static int dp83867_of_init(struct phy_device *phydev)
 {
+	struct dp83867_private *dp83867 = phydev->priv;
+	u16 delay;
+
+	/* For non-OF device, the RX and TX ID values are either strapped
+	 * or take from default value. So, we init RX & TX ID values here
+	 * so that the RGMIIDCTL is configured correctly later in
+	 * dp83867_config_init();
+	 */
+	delay = phy_read_mmd(phydev, DP83867_DEVADDR, DP83867_RGMIIDCTL);
+	dp83867->rx_id_delay = delay & DP83867_RGMII_RX_CLK_DELAY_MAX;
+	dp83867->tx_id_delay = (delay >> DP83867_RGMII_TX_CLK_DELAY_SHIFT) &
+			       DP83867_RGMII_TX_CLK_DELAY_MAX;
+
+	/* Per datasheet, IO impedance is default to 50-ohm, so we set the
+	 * same here or else the default '0' means highest IO impedance
+	 * which is wrong.
+	 */
+	dp83867->io_impedance = DP83867_IO_MUX_CFG_IO_IMPEDANCE_MIN / 2;
+
 	return 0;
 }
 #endif /* CONFIG_OF_MDIO */

-- 
2.25.1

On Wed Oct 13 2021, Ong Boon Leong wrote:

From: "Lay, Kuan Loon" <redacted>

PHY driver dp83867 has rich supports for OF-platform to fine-tune the PHY
chip during phy configuration. However, for non-OF platform, certain PHY
tunable parameters such as IO impedance and RX & TX internal delays are
critical and should be initialized to its default during PHY driver probe.

Tested-by: Clement <redacted>
Signed-off-by: Lay, Kuan Loon <redacted>
Co-developed-by: Ong Boon Leong <redacted>
Signed-off-by: Ong Boon Leong <redacted>

Thanks!

Tested-by: Kurt Kanzenbach <kurt@linutronix.de>

Hello:

This patch was applied to netdev/net-next.git (master)
by Jakub Kicinski [off-list ref]:

On Wed, 13 Oct 2021 14:59:40 +0800 you wrote:

Changes in v2:

 * drop "net: phy: dp83867: add generic PHY loopback" patch as not relevant.
   Thanks Vee Khee for pointing out.
 * Fix dictionary spell check error detected and length issue detected.

Thanks
Boon Leong

[...]

Here is the summary with links:
  - [net-next,v2,1/1] net: phy: dp83867: introduce critical chip default init for non-of platform
    https://git.kernel.org/netdev/net-next/c/4dc08dcc9f6f

You are awesome, thank you!
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