[PATCH v4 0/9] ARM: sun9i: Enable MMC support on Allwinner A80

Chen-Yu Tsai wens at csie.org
Fri Jan 16 21:19:25 PST 2015

Hi Maxime,

This is v4 of the sun9i mmc series. The following patches from v3
were merged and are dropped:

    ARM: dts: sun9i: Add pinmux setting for mmc0
    ARM: dts: sunxi: Use label to reference pio in sunxi-common-regulators
    ARM: dts: sun9i: Add mmc module clock nodes for A80
    clk: sunxi: Add a common setup function for mmc module clocks

Hopefully this is the last version, and we can get everything in for
3.20. If you've finished your clock-indices work, feel free to skip:

    ARM: dts: sun9i: Add clock-indices property for bus gate clocks

Changes since v3:

  - Rearranged device nodes in a80 optimus board dts according
    to alphabetical order.
  - Fixed check on of_io_request_and_map() call in mod0 clock

ChenYu Tsai

Original cover letter from v3:

This series enables MMC support on the A80 using existing drivers
we have. The A80 has 4 MMC controllers. These controllers share
a common clock gate and reset control, which are then sub-divided
to each controller.

The phase clocks are the same as the older SoCs, so it should be
straight forward to add them with the rest of the sunxi family.
I did find that Allwinner's kernel uses different delay values
for the A80, but so far I've not run into any issues using the
mainline kernel.

Patch 1 adds a generic setup function for the mmc module/phase
clocks, which is re-used in patch 2.

Patch 2 adds module 0 type clock support for the A80. These are
essentially the same as mod0 clocks on other Allwinner SoCs, except
for the wider mux bits.

Patch 3 adds mmc mod clocks to the DTSI.

Patch 4 adds support for the mmc config (term from user manual) clocks.
This is the part that breaks out the clock gates and reset controls
for each controller. This is implemented as a platform driver, as
the shared reset control must be de-asserted for any of either this
or the mmc blocks to work.

Patch 5 adds clock-indices properties to the AHB/APB gate clocks.
This is needed for of_clk_get_parent_name to work properly, as we
use bit indices instead of counting the entries.

Patch 6 adds the mmc config clock nodes to the DTSI.

Patch 7 changes sunxi-common-regulators.dtsi to use labels to
reference the pio node.

Patch 8 adds the mmc controller nodes to the DTSI.

Patch 9 and 12 add the pinmux settings for mmc0 and mmc2.

Patch 10 converts the a80 optimus board dts to using label references,
which is the preferred way, before enabling any new devices.

Patch 11 and 13 enable mmc0 and mmc2 on the A80 Optimus Board.

Kudos to Andreas for figuring out all the DT bits. His SoB
is on the relevant patches.

Changes since v2:

  - Rebased onto current sunxi-next and sunxi mmc phase clock
    series v3
  - Added patch "clk: sunxi: Add a common setup function for
    mmc module clocks"
  - Use new common setup function for a80 mmc module clocks
  - Added patch "ARM: dts: sun9i: Convert a80 optimus board
    dts to label referencing"
  - Use label referencing in a80 optimus board dts

Changes since v1:

  - Use sunxi-common-regulators.dtsi for vmmc regulator
  - Rebased onto sunxi mmc phase clock series v2
  - Use new multi-output mmc module clock style
  - Rename sun9i mmc config clock name and compatible
  - Make mmc2_pins include all pins needed, and change
    name to mmc2_8bit_pins
  - Add spaces between pin names in mmc pins
  - Add clk_prepare_enable()/clk_disable_unprepare() calls to
    reset control ops for the mmc config clock
  - Use DIV_ROUND_UP when calculating number of clocks in sun9i
    mmc config clock probe function
  - Add required properties and outputs section for sun9i mmc
    config clock in bindings doc; also add an example

Chen-Yu Tsai (9):
  clk: sunxi: Add mod0 and mmc module clock support for A80
  clk: sunxi: Add driver for A80 MMC config clocks/resets
  ARM: dts: sun9i: Add clock-indices property for bus gate clocks
  ARM: dts: sun9i: Add mmc config clock nodes
  ARM: dts: sun9i: Add mmc controller nodes to the A80 dtsi
  ARM: dts: sun9i: Convert a80 optimus board dts to label referencing
  ARM: dts: sun9i: Enable mmc0 on A80 Optimus Board
  ARM: dts: sun9i: Add 8 bit mmc pinmux setting for mmc2
  ARM: dts: sun9i: Enable mmc2 on A80 Optimus Board

 Documentation/devicetree/bindings/clock/sunxi.txt |  30 ++-
 arch/arm/boot/dts/sun9i-a80-optimus.dts           | 103 ++++++----
 arch/arm/boot/dts/sun9i-a80.dtsi                  |  80 ++++++++
 drivers/clk/sunxi/Makefile                        |   1 +
 drivers/clk/sunxi/clk-mod0.c                      |  32 ++++
 drivers/clk/sunxi/clk-sun9i-mmc.c                 | 222 ++++++++++++++++++++++
 6 files changed, 427 insertions(+), 41 deletions(-)
 create mode 100644 drivers/clk/sunxi/clk-sun9i-mmc.c


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