From mboxrd@z Thu Jan 1 00:00:00 1970 From: Nicolas Ferre Subject: Re: [PATCH V2] AT91: dt: at91sam9g45 family and board device tree files Date: Wed, 19 Oct 2011 10:03:16 +0200 Message-ID: <4E9E8444.3070603@atmel.com> References: <1317636056-9537-1-git-send-email-nicolas.ferre@atmel.com> <4E8C54DC.6040700@gmail.com> <4E8EF6F4.4030905@atmel.com> <4E9D4FD5.8080802@atmel.com> <4E9DE51A.7070900@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <4E9DE51A.7070900@gmail.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-arm-kernel-bounces@lists.infradead.org Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org To: Rob Herring Cc: grant.likely@secretlab.ca, devicetree-discuss@lists.ozlabs.org, Jean-Christophe PLAGNIOL-VILLARD , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org List-Id: devicetree@vger.kernel.org On 10/18/2011 10:44 PM, Rob Herring : > Nicolas, > > On 10/18/2011 05:07 AM, Nicolas Ferre wrote: >> On 10/07/2011 02:56 PM, Nicolas Ferre : >>> On 10/05/2011 03:00 PM, Rob Herring : >>>> Nicolas, >>>> >>>> On 10/03/2011 05:00 AM, Nicolas Ferre wrote: >>>>> Create a new device tree source file for Atmel at91sam9g45 SoC family. >>>>> The Evaluation Kit at91sam9m10g45ek includes it. >>>>> This first basic support will be populated as drivers and boards will be >>>>> converted to device tree. >>>>> Contains serial, dma and interrupt controllers. >>>>> >>>>> The generic board file still takes advantage of platform data for early serial >>>>> init. As we need a storage media and the NAND flash driver is not converted to >>>>> DT yet, we keep old initialization for it. >>>>> >>>>> Signed-off-by: Nicolas Ferre >> >> [..] >> >>>>> diff --git a/arch/arm/mach-at91/board-dt.c b/arch/arm/mach-at91/board-dt.c >>>>> new file mode 100644 >>>>> index 0000000..7bcb9a9 >>>>> --- /dev/null >>>>> +++ b/arch/arm/mach-at91/board-dt.c >>>>> @@ -0,0 +1,122 @@ >>>>> +/* >>>>> + * Setup code for AT91SAM Evaluation Kits with Device Tree support >>>>> + * >>>>> + * Covers: * AT91SAM9G45-EKES board >>>>> + * * AT91SAM9M10-EKES board >>>>> + * * AT91SAM9M10G45-EK board >>>>> + * >>>>> + * Copyright (C) 2011 Atmel, >>>>> + * 2011 Nicolas Ferre >>>>> + * >>>>> + * Licensed under GPLv2 or later. >>>>> + */ >>>>> + >>>>> +#include >>>>> +#include >>>>> +#include >>>>> +#include >>>>> +#include >>>>> +#include >>>>> + >>>>> +#include >>>>> +#include >>>>> +#include >>>>> +#include >>>>> +#include >>>>> + >>>>> +#include >>>>> +#include >>>>> +#include >>>>> +#include >>>>> +#include >>>>> + >>>>> +#include "sam9_smc.h" >>>>> +#include "generic.h" >> >> As found by Jean-Christophe, it seems that some clock lookup data are missing here. Something like: >> >> +/* >> + * Lookup table for attaching a specific name and platform_data pointer to >> + * devices as they get created by of_platform_populate(). Ideally this table >> + * would not exist, but the current clock implementation depends on some devices >> + * having a specific name. >> + / >> +static const struct of_dev_auxdata at91_auxdata_lookup[] __initconst = { >> + / at91sam9260/ at91sam9g20 / >> + OF_DEV_AUXDATA("atmel,at91sam9260-usart", 0xfffff200, "atmel_usart.0", NULL), >> + OF_DEV_AUXDATA("atmel,at91sam9260-usart", 0xfffb0000, "atmel_usart.1", NULL), >> + OF_DEV_AUXDATA("atmel,at91sam9260-usart", 0xfffb4000, "atmel_usart.2", NULL), >> + OF_DEV_AUXDATA("atmel,at91sam9260-usart", 0xfffb8000, "atmel_usart.3", NULL), >> + OF_DEV_AUXDATA("atmel,at91sam9260-usart", 0xfffd0000, "atmel_usart.4", NULL), >> + OF_DEV_AUXDATA("atmel,at91sam9260-usart", 0xfffd4000, "atmel_usart.5", NULL), >> + OF_DEV_AUXDATA("atmel,at91sam9260-usart", 0xfffd8000, "atmel_usart.6", NULL), >> + / at91sam9g45*/ >> + OF_DEV_AUXDATA("atmel,at91sam9260-usart", 0xffffee00, "atmel_usart.0", NULL), >> + OF_DEV_AUXDATA("atmel,at91sam9260-usart", 0xfff8c000, "atmel_usart.1", NULL), >> + OF_DEV_AUXDATA("atmel,at91sam9260-usart", 0xfff90000, "atmel_usart.2", NULL), >> + OF_DEV_AUXDATA("atmel,at91sam9260-usart", 0xfff94000, "atmel_usart.3", NULL), >> + OF_DEV_AUXDATA("atmel,at91sam9260-usart", 0xfff98000, "atmel_usart.4", NULL), >> + { /* sentinel */ } >> +}; >> >> With a change here: >> of_platform_populate(NULL, of_default_bus_match_table, at91_auxdata_lookup, NULL); >> >> I know that it is a temporary usage of auxdata. Does it sound the right thing to do for the moment? >> > > If clk lookups are the only thing needed, can't you jusst add the > lookups for DT? You mean this code surrounded by #ifdef CONFIG_OF? This board file is dedicated to device tree support and selects CONFIG_USE_OF in Kconfig... So I thought it was not necessary to add it. Cheers, -- Nicolas Ferre