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Message-ID: <715d883f-184f-474a-a222-208d3aa03d2c@linux.intel.com>
Date: Tue, 15 Apr 2025 15:28:58 +0300
From: Jarkko Nikula <jarkko.nikula@...ux.intel.com>
To: Jesper Dangaard Brouer <hawk@...nel.org>,
Luis Oliveira <lolivei@...opsys.com>,
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc: Mika Westerberg <mika.westerberg@...ux.intel.com>,
Jan Dabros <jsd@...ihalf.com>, Andi Shyti <andi.shyti@...nel.org>,
linux-i2c@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
kernel-team <kernel-team@...udflare.com>
Subject: Re: Hitting WARN_ON_ONCE in i2c-designware-common.c
Hi
On 4/15/25 3:03 PM, Jesper Dangaard Brouer wrote:
> Hi Maintainers,
>
> I'm hitting a WARN_ON_ONCE in drivers/i2c/busses/i2c-designware-common.c
> when booting the kernel on our Gen12 hardware.
>
> I'm using devel kernel net-next at commit 1a9239bb425 (merge tag 'net-
> next-6.15').
>
Is this a regression so was this working before?
Support for this platform was added back in 2016 by the commit
e4e666ba74d4 ("i2c: designware: Add device HID for future AMD I2C
controller").
> [ 10.062651] i2c_designware AMDI0010:00: Unknown Synopsys component
> type: 0xffffffff
> [ 10.073312] pps_core: LinuxPPS API ver. 1 registered
> [ 10.073372] piix4_smbus 0000:00:14.0: SMBus Host Controller at 0xb00,
> revision 0
> [ 10.075433] i2c_designware AMDI0010:01: Unknown Synopsys component
> type: 0xffffffff
These "Unknown Synopsys component type: 0xffffffff" errors indicate IP
is not alive. Perhaps linked to the missing clock or not powered.
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