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From: Mike Frysinger <vapier.adi-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
To: Ernst Schwab <eschwab-BGeptl67XyCzQB+pC5nmwQ@public.gmane.org>
Cc: David Brownell
	<dbrownell-Rn4VEauK+AKRv+LV9MX5uipxlwaOVQ5f@public.gmane.org>,
	spi-devel-general-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org,
	yi.li-OyLXuOCK7orQT0dZR+AlfA@public.gmane.org
Subject: Re: [PATCH 1/5] spi: spi_lock_bus and spi_unlock_bus
Date: Tue, 16 Feb 2010 19:40:20 -0500	[thread overview]
Message-ID: <8bd0f97a1002161640u58a6dc70s8cfb63bb4e729f83@mail.gmail.com> (raw)
In-Reply-To: <C97ECEF9A58744F8A9140FAC483AC090@pces>

On Tue, Feb 16, 2010 at 19:21, Ernst Schwab wrote:
> Mike Frysinger wrote:
>> this is what i proposed last time, but we havent gotten around to
>> implementing it:
>>
>>  - add a new spi_master flag to spi.h like SPI_MASTER_HALF_DUPLEX --
>> SPI_MASTER_LOCK_BUS
>>  - have the mmc_spi code check that bit in the master before falling
>> back to its hack
>
> This would limit the bus locking capability of the _API_ to a single
> driver (the mmc_spi), or did I miss something?

the mmc_spi code checks for exclusiveness at load time ... it needs to
have the lock/unlock steps pushed down to where it actually needs it
-mike

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  reply	other threads:[~2010-02-17  0:40 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-02-16 19:44 [PATCH 0/5] spi/mmc_spi: SPI bus locking to use mmc_spi together with other SPI devices Ernst Schwab
     [not found] ` <20100216204450.e043eed8.eschwab-BGeptl67XyCzQB+pC5nmwQ@public.gmane.org>
2010-02-16 19:57   ` [PATCH 1/5] spi: spi_lock_bus and spi_unlock_bus Ernst Schwab
     [not found]     ` <20100216205720.ebe949a1.eschwab-BGeptl67XyCzQB+pC5nmwQ@public.gmane.org>
2010-02-16 20:43       ` Grant Likely
     [not found]         ` <fa686aa41002161243y6e24e439yff54a28cbe295de3-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2010-02-16 21:16           ` Ned Forrester
     [not found]             ` <4B7B0B1C.8050407-/d+BM93fTQY@public.gmane.org>
2010-02-16 23:23               ` Grant Likely
2010-02-17  0:07           ` Mike Frysinger
2010-02-17  0:21             ` Ernst Schwab
2010-02-17  0:40               ` Mike Frysinger [this message]
     [not found]             ` <8bd0f97a1002161607m3c748ccegaffb83c42667287a-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2010-02-17  3:48               ` Grant Likely
     [not found]                 ` <fa686aa41002161948o31a48fc9kac263b0ac34f1a8d-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2010-02-17  4:34                   ` Mike Frysinger
     [not found]                     ` <8bd0f97a1002162034r2d3e397eq12ae0f0df1ae2adb-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2010-02-17  4:47                       ` Grant Likely
     [not found]                         ` <fa686aa41002162047h4b4c9cdam2133baf3b7d0e27c-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2010-02-17  5:04                           ` Mike Frysinger
     [not found]                             ` <8bd0f97a1002162104u5291da69gbff20837f78c9cdf-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2010-02-17  5:08                               ` Grant Likely
2010-02-17  4:37               ` Grant Likely
2010-02-17  0:16         ` Ernst Schwab
2010-02-17  4:32           ` Grant Likely
2010-02-17  7:35             ` Ernst Schwab
2010-02-17 13:30               ` Grant Likely
     [not found]                 ` <fa686aa41002170530i2ae007c2ia4f2ad185dfd2713-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2010-02-17 14:12                   ` Grant Likely

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