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From: Paul Cercueil <paul@crapouillou.net>
To: Siarhei Volkau <lis8215@gmail.com>
Cc: Arnd Bergmann <arnd@arndb.de>, kernel test robot <lkp@intel.com>,
	kbuild-all@lists.01.org,
	Michael Turquette <mturquette@baylibre.com>,
	Stephen Boyd <sboyd@kernel.org>, Rob Herring <robh+dt@kernel.org>,
	Krzysztof Kozlowski <krzk@kernel.org>,
	Vinod Koul <vkoul@kernel.org>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
	Linus Walleij <linus.walleij@linaro.org>,
	Jiri Slaby <jirislaby@kernel.org>,
	linux-clk@vger.kernel.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org, dmaengine@vger.kernel.org,
	linux-serial@vger.kernel.org, linux-mips@vger.kernel.org,
	GPIO SUBSYSTEM <linux-gpio@vger.kernel.org>
Subject: Re: [PATCH 7/8] serial: 8250/ingenic: Add support for the JZ4750/JZ4755 SoCs
Date: Thu, 13 Oct 2022 10:17:04 +0100	[thread overview]
Message-ID: <GSPOJR.M4XZ4D03G60F@crapouillou.net> (raw)
In-Reply-To: <bb9f79d4-82a9-4790-b849-d517333ea2d4@app.fastmail.com>

Hi,

Le jeu., oct. 13 2022 at 08:46:39 +0200, Arnd Bergmann <arnd@arndb.de> 
a écrit :
> On Thu, Oct 13, 2022, at 8:37 AM, Siarhei Volkau wrote:
>>  пн, 10 окт. 2022 г. в 01:29, kernel test robot 
>> <lkp@intel.com>:
>>>  config: ia64-allyesconfig
>>>  config: arm64-randconfig-r035-20221010
>> 
>>>   > 142  #define CGU_REG_CPCCR   ((void *)CKSEG1ADDR(0x10000000))
>> 
>>>  0-DAY CI Kernel Test Service
>> 
>>  I know CKSEG1ADDR is MIPS specific, might be it needed to disable 
>> COMPILE_TEST
>>  on the driver?
>>  Since early syscon isn't mainlined yet I don't see any other way at 
>> the moment.
>> 
>>  Any suggestions on that, folks?
> 
> This looks like some setup that belongs into the bootloader. If you 
> are
> handing over the console from bootloader to kernel, the hardware 
> should
> already be in a working state, with no need to touch it during early
> boot.
> 
> If you are dealing with broken bootloaders that are not under your 
> control,
> having this code in the architecture specific early boot as a fixup
> would be better than putting it into the driver.

Agreed. I am not fond of having a driver poking into an unrelated 
subsystem's memory area.

Just disable the divider in ingenic_fixup_fdt() in 
arch/mips/generic/board-ingenic.c.

Cheers,
-Paul



  reply	other threads:[~2022-10-13  9:17 UTC|newest]

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-10-09 18:13 [PATCH 0/8] MIPS: ingenic: Add support for the JZ4755 SoC Siarhei Volkau
2022-10-09 18:13 ` [PATCH 1/8] dt-bindings: " Siarhei Volkau
2022-10-10 14:53   ` Krzysztof Kozlowski
2022-10-10 20:18     ` Siarhei Volkau
2022-10-11 12:08       ` Krzysztof Kozlowski
2022-10-13  9:03       ` Paul Cercueil
2022-10-09 18:13 ` [PATCH 2/8] MIPS: ingenic: add new machine type MACH_JZ4755 Siarhei Volkau
2022-10-09 18:13 ` [PATCH 3/8] dt-bindings: clock: Add Ingenic JZ4755 CGU header Siarhei Volkau
2022-10-10 13:05   ` Rob Herring
2022-10-09 18:13 ` [PATCH 4/8] clk: Add Ingenic JZ4755 CGU driver Siarhei Volkau
2022-10-10 19:24   ` kernel test robot
2022-10-09 18:13 ` [PATCH 5/8] pinctrl: ingenic: JZ4755 minor bug fixes Siarhei Volkau
2022-10-17  9:46   ` Linus Walleij
2022-10-09 18:13 ` [PATCH 6/8] dmaengine: JZ4780: Add support for the JZ4755 Siarhei Volkau
2022-10-09 18:13 ` [PATCH 7/8] serial: 8250/ingenic: Add support for the JZ4750/JZ4755 SoCs Siarhei Volkau
2022-10-09 22:28   ` kernel test robot
2022-10-13  6:37     ` Siarhei Volkau
2022-10-13  6:46       ` Arnd Bergmann
2022-10-13  9:17         ` Paul Cercueil [this message]
2022-10-13 18:56           ` Siarhei Volkau
2022-10-16 18:39             ` Siarhei Volkau
2022-10-17  9:31               ` Paul Cercueil
2022-10-19 15:19                 ` Siarhei Volkau
2022-10-10 16:12   ` kernel test robot
2022-10-10 20:20   ` Greg Kroah-Hartman
2022-10-11 18:38     ` Siarhei Volkau
2022-10-10 21:39   ` kernel test robot
2022-10-09 18:13 ` [PATCH 8/8] MIPS: DTS: Ingenic: Add support for the JZ4755 SoC Siarhei Volkau
2022-10-10 14:54   ` Krzysztof Kozlowski
2022-10-10 20:00     ` Siarhei Volkau
2022-10-11 12:09       ` Krzysztof Kozlowski

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