On Wed, May 20, 2020 at 07:10:06PM +0200, Roelof Berg wrote:
Hi Roelof
Here is how i would do this. I don't like this MII bus snooping. It is
a microchip propriety's thing, which is not well understood. It adds
no value over just doing what every other MAC driver does in the
link_change callback,
0 12:43 PM
To: Andrew Lunn
Cc: Bryan Whitehead - C21958 ; UNGLinuxDriver
; David S. Miller ;
net...@vger.kernel.org; linux-kernel@vger.kernel.org
Subject: Re: [PATCH] lan743x: Added fixed link support
EXTERNAL EMAIL: Do not click links or open attachments unless you know the
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Hi
Hi Andrew,
thank you for the example, your input got me further. Sorry if my e-mails made
the impression that the MAC is sending MDIO on its own. It can issue MDIO but I
assume it will do this only on request of the MCU.
I read the data sheets again and found what might have confused us. There
> -Original Message-
> From: Roelof Berg
> Sent: Sunday, May 17, 2020 4:45 PM
> To: Andrew Lunn
> Cc: Bryan Whitehead - C21958 ;
> UNGLinuxDriver ; David S. Miller
> ; net...@vger.kernel.org; linux-
> ker...@vger.kernel.org
> Subject: Re: [PATCH] lan743
> I double checked the vendor documentation and according to the data
> sheet in this device the MAC detects speed and duplex mode. It uses
> PINs, traces clocks … Also according to an application note of the
> vendor duplex and speed detection should be enabled in the MAC
> registers.
In general,
Hi,
thanks a lot for guiding me. A thought on the transparency of fixed-phy
regarding this section:
>
>> +/* Set duplex mode */
>> +if (phydev->duplex)
>> +data |= MAC_CR_DPX_;
>> +else
>> +
Hi,
thanks a lot for going into detail. I also want to make sure that everything
will be right.
> Am 18.05.2020 um 01:50 schrieb Andrew Lunn :
>
+ /* Configure MAC to fixed link parameters */
+ data = lan743x_csr_read(adapter, MAC_CR);
+
> >> + /* Configure MAC to fixed link parameters */
> >> + data = lan743x_csr_read(adapter, MAC_CR);
> >> + /* Disable auto negotiation */
> >> + data &= ~(MAC_CR_ADD_ | MAC_CR_ASD_);
> >
> > Why does the MAC care about autoneg? I
To Everyone: I need a test hardware recommendation for a lan7431/0 NIC in
normal mode (not fixed-link mode). In prior patches this was not necessary,
because I was able to ensure 100% backwards compatibility by careful coding
alone. But I might soon come to a point where I need to test phy-conne
> @@ -946,6 +949,9 @@ static void lan743x_phy_link_status_change(struct
> net_device *netdev)
> {
> struct lan743x_adapter *adapter = netdev_priv(netdev);
> struct phy_device *phydev = netdev->phydev;
> + struct device_node *phynode;
> + phy_interface_t phyifc = PHY_INTERFACE_
On 5/13/2020 12:06 PM, Roelof Berg wrote:
> Microchip lan7431 is frequently connected to a phy. However, it
> can also be directly connected to a MII remote peer without
> any phy in between. For supporting such a phyless hardware setup
> in Linux we added the capability to the driver to underst
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