linux-kernel - Re: [PATCH 04/16] soc: renesas: Add SYSC driver for Renesas RZ/G3S

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Message-ID: <23531a70-cf50-4b32-a9fd-81e6cfcbcf9d@tuxon.dev>
Date: Wed, 25 Sep 2024 10:50:24 +0300
From: claudiu beznea <claudiu.beznea@...on.dev>
To: Geert Uytterhoeven <geert@...ux-m68k.org>
Cc: vkoul@...nel.org, kishon@...nel.org, robh@...nel.org, krzk+dt@...nel.org,
 conor+dt@...nel.org, p.zabel@...gutronix.de, geert+renesas@...der.be,
 magnus.damm@...il.com, gregkh@...uxfoundation.org, mturquette@...libre.com,
 sboyd@...nel.org, yoshihiro.shimoda.uh@...esas.com,
 biju.das.jz@...renesas.com, ulf.hansson@...aro.org,
 linux-phy@...ts.infradead.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-renesas-soc@...r.kernel.org,
 linux-usb@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
 linux-clk@...r.kernel.org, linux-pm@...r.kernel.org,
 Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
Subject: Re: [PATCH 04/16] soc: renesas: Add SYSC driver for Renesas RZ/G3S

Hi, Geert,

On 24.09.2024 14:32, Geert Uytterhoeven wrote:
> Hi Claudiu,
> 
> On Thu, Aug 22, 2024 at 5:28 PM Claudiu <claudiu.beznea@...on.dev> wrote:
>> From: Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
>>
>> The RZ/G3S SYS Controller has 2 registers (one for PCIE one for USB) that
>> need to be configured before/after powering off/on the PCI or USB
>> ares. The bits in these registers control signals to PCIE and USB that
>> need to be de-asserted/asserted after/before power on/off event. For this
>> add SYSC controller driver that registers a reset controller driver on
>> auxiliary bus which allows USB, PCIE drivers to control these signals.
>>
>> Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
> 
> Thanks for your patch!
> 
>> --- /dev/null
>> +++ b/drivers/reset/reset-rzg3s-sysc.c
>> @@ -0,0 +1,140 @@
>> +// SPDX-License-Identifier: GPL-2.0
>> +/*
>> + * Renesas RZ/G3S SYSC reset driver
>> + *
>> + * Copyright (C) 2024 Renesas Electronics Corp.
>> + */
>> +
>> +#include <linux/auxiliary_bus.h>
> 
> Using the Auxiliary Bus requires selecting AUXILIARY_BUS.

Thank you for pointing it. I'll adjust it in the next version, if it will
be one.


> Elsse you might run into build failures:
> 
> aarch64-linux-gnu-ld: drivers/soc/renesas/rzg3s-sysc.o: in function
> `rzg3s_sysc_probe':
> rzg3s-sysc.c:(.text+0x21c): undefined reference to `auxiliary_device_init'
> aarch64-linux-gnu-ld: rzg3s-sysc.c:(.text+0x264): undefined reference
> to `__auxiliary_device_add'
> aarch64-linux-gnu-ld: drivers/reset/reset-rzg3s-sysc.o: in function
> `rzg3s_sysc_reset_driver_init':
> reset-rzg3s-sysc.c:(.init.text+0x1c): undefined reference to
> `__auxiliary_driver_register'
> aarch64-linux-gnu-ld: drivers/reset/reset-rzg3s-sysc.o: in function
> `rzg3s_sysc_reset_driver_exit':
> reset-rzg3s-sysc.c:(.exit.text+0x10): undefined reference to
> `auxiliary_driver_unregister'
> 
> Gr{oetje,eeting}s,
> 
>                         Geert
>