linux-kernel - Re: [PATCH v2 00/12] PolarFire SoC reset controller & clock cleanups

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Date:   Wed, 10 Aug 2022 11:50:43 +0000
From:   <Daire.McNamara@...rochip.com>
To:     <p.zabel@...gutronix.de>, <palmer@...belt.com>,
        <Conor.Dooley@...rochip.com>, <krzysztof.kozlowski+dt@...aro.org>,
        <mturquette@...libre.com>, <sboyd@...nel.org>, <robh+dt@...nel.org>
CC:     <paul.walmsley@...ive.com>, <linux-riscv@...ts.infradead.org>,
        <linux-clk@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <aou@...s.berkeley.edu>
Subject: Re: [PATCH v2 00/12] PolarFire SoC reset controller & clock cleanups

Reviewed-by: Daire McNamara <daire.mcnamara@...rochip.com>

On Mon, 2022-07-04 at 13:15 +0100, Conor Dooley wrote:
> Hey all,
> I know I have not sat on the RFC I sent about the aux. bus parts
> for too long, but figured I'd just send the whole thing anyway to all
> lists etc.
> 
> Kinda two things happening in this series, but I sent it together to
> ensure the second part would apply correctly.
> 
> The first is the reset controller that I promised after discovering
> the
> issue triggered by CONFIG_PM & the phy not coming up correctly. I
> have
> now removed all the messing with resets from clock enable/disable
> functions & now use the aux bus to set up a reset controller driver.
> Since I needed something to test it, I hooked up the reset for the
> Cadence MACB on PolarFire SoC. This has been split into a second
> series
> for v2:
> https://lore.kernel.org/all/20220704114511.1892332-1-conor.dooley@microchip.com/
> 
> The second part adds rate control for the MSS PLL clock, followed by
> some simplifications to the driver & conversions of some custom
> structs
> to the corresponding structs in the framework.
> 
> Thanks,
> Conor.
> 
> Changes since v1:
> - split off the net patches
> - clk: actually pass the spinlock to the converted dividers & gates
> - reset: added a spinlock around RMW access to registers
> - reset: switched to BIT(i) macros
> - reset: used local copies of some variables as pointed out by
> Philipp
> - reset: dropped the success printout
> 
> Conor Dooley (12):
>   dt-bindings: clk: microchip: mpfs: add reset controller support
>   clk: microchip: mpfs: add reset controller
>   reset: add polarfire soc reset support
>   MAINTAINERS: add polarfire soc reset controller
>   riscv: dts: microchip: add mpfs specific macb reset support
>   clk: microchip: mpfs: add module_authors entries
>   clk: microchip: mpfs: add MSS pll's set & round rate
>   clk: microchip: mpfs: move id & offset out of clock structs
>   clk: microchip: mpfs: simplify control reg access
>   clk: microchip: mpfs: delete 2 line mpfs_clk_register_foo()
>   clk: microchip: mpfs: convert cfg_clk to clk_divider
>   clk: microchip: mpfs: convert periph_clk to clk_gate
> 
>  .../bindings/clock/microchip,mpfs.yaml        |  17 +-
>  MAINTAINERS                                   |   1 +
>  arch/riscv/boot/dts/microchip/mpfs.dtsi       |   7 +-
>  drivers/clk/microchip/Kconfig                 |   1 +
>  drivers/clk/microchip/clk-mpfs.c              | 379 +++++++++-------
> --
>  drivers/reset/Kconfig                         |   7 +
>  drivers/reset/Makefile                        |   2 +-
>  drivers/reset/reset-mpfs.c                    | 157 ++++++++
>  include/soc/microchip/mpfs.h                  |   8 +
>  9 files changed, 386 insertions(+), 193 deletions(-)
>  create mode 100644 drivers/reset/reset-mpfs.c
> 
> 
> base-commit: b13baccc3850ca8b8cccbf8ed9912dbaa0fdf7f3