linux-kernel - Re: arm qemu test failures due to 'driver-core: platform: probe of-devices only using list of compatibles'

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Message-ID: <56C21B79.8000408@arm.com>
Date:	Mon, 15 Feb 2016 18:39:53 +0000
From:	Sudeep Holla <sudeep.holla@....com>
To:	Guenter Roeck <linux@...ck-us.net>,
	Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
Cc:	Sudeep Holla <sudeep.holla@....com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-next@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: arm qemu test failures due to 'driver-core: platform: probe
 of-devices only using list of compatibles'



On 15/02/16 18:12, Guenter Roeck wrote:

[...]

>
> I added some debugging on top of your patch, and get:
>
> platform basic-mmio-gpio.1.auto: Device node exists
> [/smb/motherboard/iofpga@7,00000000/sysreg@...00/sys_led@08],
> of_driver_match_device() failed
> platform basic-mmio-gpio.1.auto: platform_match_id() succeeded
> platform basic-mmio-gpio.2.auto: Device node exists
> [/smb/motherboard/iofpga@7,00000000/sysreg@...00/sys_mci@48],
> of_driver_match_device() failed
> platform basic-mmio-gpio.2.auto: platform_match_id() succeeded
> platform basic-mmio-gpio.3.auto: Device node exists
> [/smb/motherboard/iofpga@7,00000000/sysreg@...00/sys_flash@4c],
> of_driver_match_device() failed
> platform basic-mmio-gpio.3.auto: platform_match_id() succeeded
>
> So it isn't the mmc driver failing to instantiate directly,
> but (I think) vexpress-sysreg.
>

That's correct, I could reproduce this issue and reported with similar
analysis earlier [1]

--
Regards,
Sudeep

[1] http://www.spinics.net/lists/arm-kernel/msg483107.html