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Message-ID: <e5fd9d8b-84eb-4ef9-82ab-ff4ecc41c0d5@broadcom.com>
Date: Thu, 22 Feb 2024 09:39:06 -0800
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Subject: Re: [PATCH v1 10/14] serial: 8250_of: Switch to use
 uart_read_port_properties()
To: Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
 Andrew Jeffery <andrew@codeconstruct.com.au>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
 Thomas Gleixner <tglx@linutronix.de>, linux-kernel@vger.kernel.org,
 linux-serial@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
 linux-aspeed@lists.ozlabs.org, linux-rpi-kernel@lists.infradead.org,
 linux-mips@vger.kernel.org, linux-tegra@vger.kernel.org,
 Jiri Slaby <jirislaby@kernel.org>, Joel Stanley <joel@jms.id.au>,
 Ray Jui <rjui@broadcom.com>, Scott Branden <sbranden@broadcom.com>,
 Broadcom internal kernel review list
 <bcm-kernel-feedback-list@broadcom.com>, Al Cooper <alcooperx@gmail.com>,
 =?UTF-8?Q?Ilpo_J=C3=A4rvinen?= <ilpo.jarvinen@linux.intel.com>,
 Paul Cercueil <paul@crapouillou.net>, Vladimir Zapolskiy <vz@mleia.com>,
 Thierry Reding <thierry.reding@gmail.com>,
 Jonathan Hunter <jonathanh@nvidia.com>,
 Kunihiko Hayashi <hayashi.kunihiko@socionext.com>,
 Masami Hiramatsu <mhiramat@kernel.org>,
 Andi Shyti <andi.shyti@linux.intel.com>
References: <20240221183442.4124354-1-andriy.shevchenko@linux.intel.com>
 <20240221183442.4124354-11-andriy.shevchenko@linux.intel.com>
 <0a828f2c50de712940fb9a881702ac1678a35b7c.camel@codeconstruct.com.au>
 <ZddKzHplwOX7naLv@smile.fi.intel.com> <Zdd5m2xIPlGI0_Qv@smile.fi.intel.com>
 <Zdd6lnXwvpPPUhRR@smile.fi.intel.com>
From: Florian Fainelli <florian.fainelli@broadcom.com>
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In-Reply-To: <Zdd6lnXwvpPPUhRR@smile.fi.intel.com>
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On 2/22/24 08:47, Andy Shevchenko wrote:
> On Thu, Feb 22, 2024 at 06:43:08PM +0200, Andy Shevchenko wrote:
>> On Thu, Feb 22, 2024 at 03:23:24PM +0200, Andy Shevchenko wrote:
>>> On Thu, Feb 22, 2024 at 11:07:05AM +1030, Andrew Jeffery wrote:
>>>> On Wed, 2024-02-21 at 20:31 +0200, Andy Shevchenko wrote:
>>>>> Since we have now a common helper to read port properties
>>>>> use it instead of sparse home grown solution.
>>>>
>>>> I did some brief testing of the series for the Aspeed machines under
>>>> qemu, building them on top of v6.8-rc5:
>>>>
>>>> export ARCH=arm
>>>> export CROSS_COMPILE=arm-linux-gnueabihf-
>>>> make aspeed_g5_defconfig
>>>> make -j$(nproc)
>>>> qemu-system-arm -M rainier-bmc -nographic -no-reboot -kernel arch/arm/boot/zImage -dtb arch/arm/boot/dts/aspeed/aspeed-bmc-ibm-rainier.dtb -initrd ...
>>>>
>>>> I got an oops during boot, which bisected to this change:
>>>
>>> Thank you for prompt testing! I will look at it.
>>
>> I found the issue, will be fixed in next version.
> 
> Whoever is going to test this series, the
> 
> -		port->iotype = use_defaults ? UPIO_MEM : port->iotype;
> +		port->iotype = UPIO_MEM;
> 
> should be applied to uart_read_port_properties() implementation.
> 

Thanks, on 8250_bcm7271.c with the above hunk applied, I did not spot 
any differences between the values returned by stty or a cat 
/sys/class/tty/ttyS0/* before or after, the console remained fully 
functional. I will see if I can run an additional test where I removed 
the DT's "clocks" property and confirm that the fall back to 
"clock-frequency" works.

Thanks Andy!
-- 
Florian


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