[v2,0/6] ARM: sunxi: Clean up sun7i-a20-gmac-clk usage

Message

Priit Laes April 30, 2020, 11:56 a.m. UTC

This serie implements syscon-based regmap access to dwmac-sunxi driver,
allowing to deprecate the allwinner,sun7i-a20-gmac-clk clock driver.

In order to register regmap, we firstly need to change existing clock
setups (sun7i-a20 and sun6i-a31) from CLK_OF_DECLARE to
CLK_OF_DECLARE_DRIVER to allow probing the same driver again via the
platform driver framework.

This patchset touches 3 areas:
- sun7i and sun6i CCUs now set up regmap to allow dwmac-sunxi driver
to access GMAC clock register.
- dwmac-sunxi can now handle syscon-based clock register to handle
its own clock.
- sun7i and sun6i devicetrees are converted to use the new syscon-based
access.

After this patchset:
- sun7i-a20 works fully without legacy sunxi clocks (CLK_SUNXI)
- only sun9i-a80 SoC remains as a single sun7i-a20-gmac-clk user.

Please note that sun6i-a31 changes are only build-tested, as I lack
the hardware to test this.

Changes since v2:
* Fix broken sun6i-a31 CCU patch.
* Rename series to "Clean up sun7i-a20-gmac-clk usage"

Changes since v1:
* Use CLK_OF_DECLARE_DRIVER to make it possible to probe again and set up
regmap using platform device probe.
* Clarify the meaning of "legacy" in dwmac-sunxi driver.
* Make sure we don't mess with the RX/TX delay settings when updating
clock registers.
* Update devicetree bindings
* Add sun6i-A31 support. (not tested due to lack of hardware)

Priit Laes (6):
  clk: sunxi-ng: a20: Register regmap for sun7i CCU
  clk: sunxi-ng: a31: Register regmap for sun6i CCU
  net: stmmac: dwmac-sunxi: Implement syscon-based clock handling
  dt-bindings: net: sun7i-gmac: Add syscon support
  ARM: dts: sun7i: Use syscon-based implementation for gmac
  ARM: dts: sun6i: Use syscon-based implementation for gmac

 .../net/allwinner,sun7i-a20-gmac.yaml         |  15 +-
 arch/arm/boot/dts/sun6i-a31.dtsi              |  35 +----
 arch/arm/boot/dts/sun7i-a20.dtsi              |  36 +----
 drivers/clk/sunxi-ng/ccu-sun4i-a10.c          |  62 ++++++++-
 drivers/clk/sunxi-ng/ccu-sun6i-a31.c          |  62 ++++++++-
 .../net/ethernet/stmicro/stmmac/dwmac-sunxi.c | 130 ++++++++++++++++--
 6 files changed, 261 insertions(+), 79 deletions(-)