linux-kernel - Re: [RFC][PATCH 1/2] clk: meson: T7: add support for Amlogic T7 SoC PLL clock driver

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Message-ID: <CAJX_Q+26Of3uwKMufDrngj5ciioqt0ne8gXD-jdmEdWTs4Ag+g@mail.gmail.com>
Date: Mon, 18 Mar 2024 15:00:17 +0000
From: Lucas Tanure <tanure@...ux.com>
To: Rob Herring <robh@...nel.org>
Cc: Xianwei Zhao <xianwei.zhao@...ogic.com>, Yu Tu <yu.tu@...ogic.com>, 
	Neil Armstrong <neil.armstrong@...aro.org>, Kevin Hilman <khilman@...libre.com>, 
	Jerome Brunet <jbrunet@...libre.com>, 
	Martin Blumenstingl <martin.blumenstingl@...glemail.com>, 
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, Conor Dooley <conor+dt@...nel.org>, 
	Stephen Boyd <sboyd@...nel.org>, Michael Turquette <mturquette@...libre.com>, 
	linux-arm-kernel@...ts.infradead.org, linux-amlogic@...ts.infradead.org, 
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-clk@...r.kernel.org
Subject: Re: [RFC][PATCH 1/2] clk: meson: T7: add support for Amlogic T7 SoC
 PLL clock driver

On Mon, Mar 18, 2024 at 2:54 PM Rob Herring <robh@...nel.org> wrote:
>
> On Mon, Mar 18, 2024 at 11:43:45AM +0000, Lucas Tanure wrote:
> > Add the T7 PLL clock controller driver in the T7 SoC family.
> >
> > This is RFC patch that enables SDCard, Ethernet and Clocking
> > for Amlogic T7 soc.
> > In this current state the patch doesn't work and gives a kernel
> > panic when probing the meson-axg-mmc for the SDCard.
> > DO NOT MERGE.
> >
> > Signed-off-by: Lucas Tanure <tanure@...ux.com>
> > ---
> >  drivers/clk/meson/Kconfig                     |   25 +
> >  drivers/clk/meson/Makefile                    |    2 +
> >  drivers/clk/meson/t7-peripherals.c            | 6368 +++++++++++++++++
> >  drivers/clk/meson/t7-peripherals.h            |  131 +
> >  drivers/clk/meson/t7-pll.c                    | 1543 ++++
> >  drivers/clk/meson/t7-pll.h                    |   83 +
> >  .../clock/amlogic,t7-peripherals-clkc.h       |  410 ++
> >  .../dt-bindings/clock/amlogic,t7-pll-clkc.h   |   69 +
> >  8 files changed, 8631 insertions(+)
> >  create mode 100644 drivers/clk/meson/t7-peripherals.c
> >  create mode 100644 drivers/clk/meson/t7-peripherals.h
> >  create mode 100644 drivers/clk/meson/t7-pll.c
> >  create mode 100644 drivers/clk/meson/t7-pll.h
>
> >  create mode 100644 include/dt-bindings/clock/amlogic,t7-peripherals-clkc.h
> >  create mode 100644 include/dt-bindings/clock/amlogic,t7-pll-clkc.h
>
> I'm assuming since this is an RFC you know these go in a separate patch
> with the DT binding schema which is missing.
>
> Rob

Yes, This would be a few patches at least. The thing right now is to
get it to work.
I think some obscure thing is missing when setting up these clocks,
and only Amlogic knows.

After I have a working driver, I will submit a proper patch series
with documentation for the drivers and device trees.

Thanks
Lucas Tanure