linux-kernel - Re: [PATCH] ARM: OMAP4: change the device names in usb_bind

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Message-ID: <519503DA.5070303@iki.fi>
Date:	Thu, 16 May 2013 19:05:46 +0300
From:	Tomi Valkeinen <tomi.valkeinen@....fi>
To:	Tony Lindgren <tony@...mide.com>
CC:	Kishon Vijay Abraham I <kishon@...com>, linux@....linux.org.uk,
	linux-omap@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org, balbi@...com
Subject: Re: [PATCH] ARM: OMAP4: change the device names in usb_bind_phy

On 16/05/13 18:58, Tony Lindgren wrote:
> * Tomi Valkeinen <tomi.valkeinen@....fi> [130515 03:59]:
>> On 23/04/13 09:14, Kishon Vijay Abraham I wrote:
>>> After the device names are created using PLATFORM_DEVID_AUTO, the old
>>> device names given in usb_bind_phy are no longer valid causing the musb
>>> controller not to get the phy reference. Updated the usb_bind_phy with
>>> the new device names to get MUSB functional in omap4 panda.
>>>
>>> Signed-off-by: Kishon Vijay Abraham I <kishon@...com>
>>> ---
>>> Tested in OMAP4 PANDA.
>>>  arch/arm/mach-omap2/board-4430sdp.c    |    2 +-
>>>  arch/arm/mach-omap2/board-omap4panda.c |    2 +-
>>>  2 files changed, 2 insertions(+), 2 deletions(-)
>>>
>>> diff --git a/arch/arm/mach-omap2/board-4430sdp.c b/arch/arm/mach-omap2/board-4430sdp.c
>>> index 00d7290..56a9a4f 100644
>>> --- a/arch/arm/mach-omap2/board-4430sdp.c
>>> +++ b/arch/arm/mach-omap2/board-4430sdp.c
>>> @@ -730,7 +730,7 @@ static void __init omap_4430sdp_init(void)
>>>  	omap4_sdp4430_wifi_init();
>>>  	omap4_twl6030_hsmmc_init(mmc);
>>>  
>>> -	usb_bind_phy("musb-hdrc.0.auto", 0, "omap-usb2.1.auto");
>>> +	usb_bind_phy("musb-hdrc.2.auto", 0, "omap-usb2.3.auto");
>>>  	usb_musb_init(&musb_board_data);
>>>  
>>>  	status = omap_ethernet_init();
>>
>> I'm seeing
>>
>> [    2.190155] unable to find transceiver
>> [    2.190155] HS USB OTG: no transceiver configured
>> [    2.190155] musb-hdrc musb-hdrc.0.auto: musb_init_controller failed
>> with status -517
>> [    2.207458] platform musb-hdrc.0.auto: Driver musb-hdrc requests
>> probe deferral
>>
>> on 4430sdp with v3.10-rc1. Does that mean that the musb-hdrc.0.auto was
>> indeed correct, and the new value of musb-hdrc.2.auto is not?
> 
> Just checking.. Do you have CONFIG_OMAP_OCP2SCP=y in your .config? Sounds
> like the some transceivers should depend on that for omap4.

Yes, I have OCP2SCP=y.

>> The musb-hdrc id is wrong on overo also.
> 
> Hmm has there been a fix posted for that?

I couldn't find with a quick look. We debugged and discussed this on an irc
channel with Kishon, who said he'll send a patch. Changing the musb-hdrc ID
on overo fixed the issue, and it looks very similar to the error on 4430sdp.
The overo fix was just:

diff --git a/arch/arm/mach-omap2/board-overo.c b/arch/arm/mach-omap2/board-overo.c
index 4ca6b68..a496774 100644
--- a/arch/arm/mach-omap2/board-overo.c
+++ b/arch/arm/mach-omap2/board-overo.c
@@ -472,7 +472,7 @@ static void __init overo_init(void)
                                  mt46h32m32lf6_sdrc_params);
        board_nand_init(overo_nand_partitions,
                        ARRAY_SIZE(overo_nand_partitions), NAND_CS, 0, NULL);
-       usb_bind_phy("musb-hdrc.0.auto", 0, "twl4030_usb");
+       usb_bind_phy("musb-hdrc.1.auto", 0, "twl4030_usb");
        usb_musb_init(NULL);
 
        usbhs_init_phys(phy_data, ARRAY_SIZE(phy_data));


Is that ID "randomly" chosen? Doesn't that mean that it'll just get broken
every now and then?

 Tomi

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