netdev - [PATCH v5 net-next 0/3] net: axienet: Use a DT property to configure frequency of the MDIO bus

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Date:   Thu, 17 Nov 2022 23:40:11 +0800
From:   Andy Chiu <andy.chiu@...ive.com>
To:     davem@...emloft.net, andrew@...n.ch, kuba@...nel.org,
        michal.simek@...inx.com, radhey.shyam.pandey@...inx.com
Cc:     netdev@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, robh+dt@...nel.org,
        pabeni@...hat.com, edumazet@...gle.com, andy.chiu@...ive.com,
        greentime.hu@...ive.com
Subject: [PATCH v5 net-next 0/3] net: axienet: Use a DT property to configure frequency of the MDIO bus

Some FPGA platforms have to set frequency of the MDIO bus lower than 2.5
MHz. Thus, we use a DT property, which is "clock-frequency", to work
with it at boot time. The default 2.5 MHz would be set if the property
is not pressent. Also, factor out mdio enable/disable functions due to
the api change since 253761a0e61b7.

Changelog:
--- v5 ---
1. Make dt-binding patch prior to the implementation patch.
2. Disable mdio bus in error path.
3. Update description of some functions.
--- v4 ---
1. change MAX_MDIO_FREQ to DEFAULT_MDIO_FREQ as suggested by Andrew.
--- v3 RESEND ---
1. Repost the exact same patch again
--- v3 ---
1. Fix coding style, and make probing of the driver fail if MDC overflow
--- v2 ---
1. Use clock-frequency, as defined in mdio.yaml, to configure MDIO
   clock.
2. Only print out frequency if it is set to a non-standard value.
3. Reduce the scope of axienet_mdio_enable and remove
   axienet_mdio_disable because no one really uses it anymore.

Andy Chiu (3):
  net: axienet: Unexport and remove unused mdio functions
  dt-bindings: describe the support of "clock-frequency" in mdio
  net: axienet: set mdio clock according to bus-frequency

 .../bindings/net/xilinx_axienet.txt           |  2 +
 drivers/net/ethernet/xilinx/xilinx_axienet.h  |  2 -
 .../net/ethernet/xilinx/xilinx_axienet_mdio.c | 79 +++++++++++--------
 3 files changed, 50 insertions(+), 33 deletions(-)

-- 
2.36.0