[0/4] ARM: sun7i: Convert A20 GMAC driver to CCU

Message

Priit Laes April 17, 2020, 10:17 p.m. UTC

This serie converts Allwinner A20 (sun7i) GMAC driver to CCU
while still retaining compatibility with existing devicetrees.

First two patches contain preliminary work which convert
sun4i/sun7i clock drivers to platform devices and creates regmap
to access gmac register from the sun7i gmac driver.

Third patch implements syscon-based regmap to allow driver manage
its own clock source.

Fourth patch updates the devicetree and drops the unused clocks.

While testing the driver I noticed following bugs with the existing
sun7i gmac driver:
- driver relies on u-boot for initialization (fixed in this
  implementation)
- `systemctl restart networking` fails to bring the link up again.


Priit Laes (4):
  clk: sunxi-ng: a10/a20: rewrite init code to a platform driver
  clk: sunxi-ng: a20: export a regmap to access the GMAC register
  net: stmmac: dwmac-sunxi: Implement syscon-based clock handling
  ARM: dts: sun7i: Use syscon-based implementation for gmac

 arch/arm/boot/dts/sun7i-a20.dtsi              |  36 +----
 drivers/clk/sunxi-ng/ccu-sun4i-a10.c          | 108 ++++++++++++---
 .../net/ethernet/stmicro/stmmac/dwmac-sunxi.c | 124 ++++++++++++++++--
 3 files changed, 206 insertions(+), 62 deletions(-)

Comments

Priit Laes April 20, 2020, 12:32 p.m. UTC | #1

On Sat, Apr 18, 2020 at 01:17:26AM +0300, Priit Laes wrote:
> This serie converts Allwinner A20 (sun7i) GMAC driver to CCU
> while still retaining compatibility with existing devicetrees.
> 
> First two patches contain preliminary work which convert
> sun4i/sun7i clock drivers to platform devices and creates regmap
> to access gmac register from the sun7i gmac driver.
> 
> Third patch implements syscon-based regmap to allow driver manage
> its own clock source.
> 
> Fourth patch updates the devicetree and drops the unused clocks.
> 
> While testing the driver I noticed following bugs with the existing
> sun7i gmac driver:
> - driver relies on u-boot for initialization (fixed in this
>   implementation)

Scratch that.. this is actually due to unhandled rx and tx delays,
which I "accidentally" fixed by copying the value BIT(12) from the
u-boot..

> - `systemctl restart networking` fails to bring the link up again.
> 
> 
> Priit Laes (4):
>   clk: sunxi-ng: a10/a20: rewrite init code to a platform driver
>   clk: sunxi-ng: a20: export a regmap to access the GMAC register
>   net: stmmac: dwmac-sunxi: Implement syscon-based clock handling
>   ARM: dts: sun7i: Use syscon-based implementation for gmac
> 
>  arch/arm/boot/dts/sun7i-a20.dtsi              |  36 +----
>  drivers/clk/sunxi-ng/ccu-sun4i-a10.c          | 108 ++++++++++++---
>  .../net/ethernet/stmicro/stmmac/dwmac-sunxi.c | 124 ++++++++++++++++--
>  3 files changed, 206 insertions(+), 62 deletions(-)
> 
> -- 
> 2.25.2
>