Re: [PATCH v2 00/10] clk: sunxi-ng: Add support for A80 CCUs

From: Maxime Ripard
Date: Mon Jan 30 2017 - 02:43:47 EST


On Sat, Jan 28, 2017 at 08:22:29PM +0800, Chen-Yu Tsai wrote:
> Hi everyone,
> This is v2 of my A80 CCU clk patches. Changes since v1:
> - Use pre-divider adjusted parent rate for rounding.
> - Use else statement for the case where the PLL lock status bit is
> in same register.
> - Add a more detailed description of the main CCU and DE CCU to the
> commit messages.
> - Fix DE CCU compatible string in DT binding example.
> - Fix incorrectly squashed patch hunk.
> - Drop leading zeros from device tree node name in DT examples.
> - Expanded commit message for "ARM: dts: sun8i-a23-q8-tablet: Drop
> pinmux setting for codec PA gpio".
> This series adds new "sunxi-ng" style drivers for the CCUs found in the
> Allwinner A80 SoC. The A80 contains 1 main clock control unit, and some
> subsystem specific clock control units at separate addresses. These
> include the USB, display engine, and MMC.
> - The MMC clocks can be supported by the old clock drivers,
> hence here we do not add a new driver for it.
> - The old USB clock driver is intertwined with other SoCs,
> requires old style bindings with clock-output-names and
> CLK_OF_DECLARE for its parents. It is easier to switch
> to a new binding and driver.
> - The display engine (DE) CCU was not supported in the past.
> The A80 CCU also has some quirks about its design. It has
> - Separate registers for PLL lock status
> - P1, P2 dividers, which are power-of-2 and only 1 bit wide
> The first 3 patches fix and extend the behavior of sunxi-ng's
> mux clock type, based on the behavior of the clk subsystem's
> basic mux clock.
> The fourth patch adds support for checking PLL lock status
> bits in separate registers, as opposed to within the PLL's
> config register.
> Patches 5 through 7 add drivers for the CCU blocks.
> Patch 8 and 9 do some cleanup of the sunxi/allwinner dts files
> prior to switching sun9i dts to the new sunxi-ng clock bindings.
> These are independent of the clk stuff, but touch the same lines
> for sun9i. Including them should make it easier to apply and test
> patches.
> Patch 10 has sun9i switch over to the new clock bindings.
> Please take a look and let me know what you think.

This is a bit late, but I took it in anyway.

Note that I only applied the patches about the CCU. The pinctrl header
stuff is quite conflict heavy, and not really a big deal anyway.

(and I really would have liked to have it as a separate series. This
has nothing to do with the A80 CCU).


Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering

Attachment: signature.asc
Description: PGP signature