linux-kernel - Re: [PATCH 7/8 v2] ARM OMAP2+ GPMC: calculate GPMCFCLKDIVIDER based on WAITMONITORINGTIME

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Date:	Wed, 25 Feb 2015 19:20:40 +0200
From:	Roger Quadros <rogerq@...com>
To:	Robert ABEL <rabel@...-ec.uni-bielefeld.de>,
	<linux-omap@...r.kernel.org>
CC:	<linux-kernel@...r.kernel.org>, <tony@...mide.com>,
	<linux@....linux.org.uk>
Subject: Re: [PATCH 7/8 v2] ARM OMAP2+ GPMC: calculate GPMCFCLKDIVIDER based
 on WAITMONITORINGTIME

Robert,

On 25/02/15 18:33, Roger Quadros wrote:
> On 24/02/15 22:05, Robert ABEL wrote:
>> The WAITMONITORINGTIME is expressed as a number of GPMC_CLK clock cycles,
>> even though the access is defined as asynchronous, and no GPMC_CLK clock
>> is provided to the external device. Still, GPMCFCLKDIVIDER is used as a divider
>> for the GPMC clock, so it must be programmed to define the
>> correct WAITMONITORINGTIME delay.
>>
>> Calculate GPMCFCLKDIVIDER independent of gpmc,sync-clk-ps in DT for
>> truly asynchronous accesses, i.e. both read and write asynchronous.
>>
>> Signed-off-by: Robert ABEL <rabel@...-ec.uni-bielefeld.de>
>> ---
>>  arch/arm/mach-omap2/gpmc-nand.c    | 17 ++++-----
>>  arch/arm/mach-omap2/gpmc-onenand.c |  4 +--
>>  drivers/memory/omap-gpmc.c         | 74 ++++++++++++++++++++++++++++++++++----
>>  include/linux/omap-gpmc.h          |  2 +-
>>  4 files changed, 80 insertions(+), 17 deletions(-)

Need to patch mach-omap2/usb-tusb6010.c as well. else we get

arch/arm/mach-omap2/usb-tusb6010.c: In function ‘tusb_set_async_mode’:
arch/arm/mach-omap2/usb-tusb6010.c:74:2: error: too few arguments to function ‘gpmc_cs_set_timings’
In file included from arch/arm/mach-omap2/gpmc.h:14:0,
                 from arch/arm/mach-omap2/usb-tusb6010.c:23:
include/linux/omap-gpmc.h:166:12: note: declared here
arch/arm/mach-omap2/usb-tusb6010.c: In function ‘tusb_set_sync_mode’:
arch/arm/mach-omap2/usb-tusb6010.c:101:2: error: too few arguments to function ‘gpmc_cs_set_timings’
In file included from arch/arm/mach-omap2/gpmc.h:14:0,
                 from arch/arm/mach-omap2/usb-tusb6010.c:23:
include/linux/omap-gpmc.h:166:12: note: declared here

cheers,
-roger

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