linux-kernel - Re: [PATCH v6 3/3] clk: Add Ingenic JZ4755 CGU driver

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Message-Id: <GOROKR.IRJ4PQUI1UN7@crapouillou.net>
Date:   Tue, 01 Nov 2022 20:31:28 +0000
From:   Paul Cercueil <paul@...pouillou.net>
To:     Stephen Boyd <sboyd@...nel.org>
Cc:     Siarhei Volkau <lis8215@...il.com>,
        Siarhei Volkau <lis8215@...il.com>,
        Michael Turquette <mturquette@...libre.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        linux-clk@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-mips@...r.kernel.org
Subject: Re: [PATCH v6 3/3] clk: Add Ingenic JZ4755 CGU driver

Hi Stephen,

Le mar. 1 nov. 2022 à 12:22:14 -0700, Stephen Boyd <sboyd@...nel.org> 
a écrit :
> Quoting Paul Cercueil (2022-10-28 00:48:35)
>>  Hi Stephen,
>> 
>>  Le jeu. 27 oct. 2022 � 14:57:14 -0700, Stephen Boyd 
>> <sboyd@...nel.org>
>>  a �crit :
>>  > Quoting Siarhei Volkau (2022-10-27 12:20:23)
>>  >>  diff --git a/drivers/clk/ingenic/jz4755-cgu.c
>>  >> b/drivers/clk/ingenic/jz4755-cgu.c
>>  >>  new file mode 100644
>>  >>  index 000000000..d2eb3ae0c
>>  >>  --- /dev/null
>>  >>  +++ b/drivers/clk/ingenic/jz4755-cgu.c
>>  >>  @@ -0,0 +1,346 @@
>>  > [...]
>>  >>  +static void __init jz4755_cgu_init(struct device_node *np)
>>  >>  +{
>>  >>  +       int retval;
>>  >>  +
>>  >>  +       cgu = ingenic_cgu_new(jz4755_cgu_clocks,
>>  >>  +                             ARRAY_SIZE(jz4755_cgu_clocks), 
>> np);
>>  >>  +       if (!cgu) {
>>  >>  +               pr_err("%s: failed to initialise CGU\n", 
>> __func__);
>>  >>  +               return;
>>  >>  +       }
>>  >>  +
>>  >>  +       retval = ingenic_cgu_register_clocks(cgu);
>>  >>  +       if (retval)
>>  >>  +               pr_err("%s: failed to register CGU Clocks\n",
>>  >> __func__);
>>  >>  +
>>  >>  +       ingenic_cgu_register_syscore_ops(cgu);
>>  >>  +}
>>  >>  +CLK_OF_DECLARE_DRIVER(jz4755_cgu, "ingenic,jz4755-cgu",
>>  >> jz4755_cgu_init);
>>  >
>>  > Is there another driver that probes this device?
>>  > CLK_OF_DECLARE_DRIVER()
>>  > is for the situation where we want to probe this device again with
>>  > another platform driver. Please add a comment indicating what that
>>  > other
>>  > driver is.
>> 
>>  See: 03d570e1a4dc ("clk: ingenic: Use CLK_OF_DECLARE_DRIVER macro")
>> 
> 
> Does that mean this is also a simple-mfd?

Yes - there's the USB PHY registers randomly in the middle of the 
clocks IP.

-Paul