From: Mark Brown <broonie@opensource.wolfsonmicro.com>
To: Jassi Brar <jassi.brar@samsung.com>
Cc: alsa-devel@alsa-project.org, ben-linux@fluff.org
Subject: Re: [PATCH 04/20] ASoC: S3C: I2Sv2: Remove S3C_IIS_V2_SUPPORTED define
Date: Wed, 10 Mar 2010 10:49:13 +0000 [thread overview]
Message-ID: <20100310104913.GF24422@rakim.wolfsonmicro.main> (raw)
In-Reply-To: <1268207349-9979-4-git-send-email-jassi.brar@samsung.com>
On Wed, Mar 10, 2010 at 04:48:53PM +0900, Jassi Brar wrote:
> The code in s3c-i2s-v2.c is compiled via Makefile and not implicitly
> by include'ing. Also, the driver developer anyways has to refer to the
> manual to see if the code can be reused for the SoC under consideration.
> That makes the S3C_IIS_V2_SUPPORTED retrospective rather than a check.
> Signed-off-by: Jassi Brar <jassi.brar@samsung.com>
This code is in there for pure defensiveness - since at least the
S3C64xx and S3C24xx have slightly different register maps for the block
(the ones that are currently handled are the IISMOD master settings,
there may be more) the code needs to have explicit support for the
processors. The goal of this block is to print a #error saying exactly
what's going on rather than just have the build fail with missing
defines in order to help make it more immediately clear to users what is
going on if they try to select a processor combination they don't know
how to handle.
Users often have a strong expectation that the driver will just work
and so relying on them consulting the processor manual isn't always
realistic.
It may be that these differences are due to some being IISv2 and some
being IISv3 or something and could easily be handled via mandatory
platform data but since none of the documentation refers to any of this
stuff and it has to be reverse engineered we've got this system based on
build time processor selection.
next prev parent reply other threads:[~2010-03-10 10:49 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-10 7:48 [PATCH 01/20] ASoC: S3C: I2Sv2: Add missing semicolon Jassi Brar
2010-03-10 7:48 ` [PATCH 02/20] ASoC: S3C: I2Sv2: Reject immidiate register value Jassi Brar
2010-03-10 7:48 ` [PATCH 03/20] ASoC: S3C64XX: I2S: Make BCLK independent of sample size Jassi Brar
2010-03-10 7:48 ` [PATCH 04/20] ASoC: S3C: I2Sv2: Remove S3C_IIS_V2_SUPPORTED define Jassi Brar
2010-03-10 7:48 ` [PATCH 05/20] ASoC: S3C: I2Sv2: Unify clock source IDs Jassi Brar
2010-03-10 7:48 ` [PATCH 06/20] ASoC: s3c-i2s-v2 remove unnecessary headers Jassi Brar
2010-03-10 7:48 ` [PATCH 07/20] ASoC: s3c64xx-i2s remove unncessary headers Jassi Brar
2010-03-10 7:48 ` [PATCH 08/20] ASoC: S3C64XX: I2S: Move RATE and FMT defines to header Jassi Brar
2010-03-10 7:48 ` [PATCH 09/20] ASoC: S3C: I2Sv2: Segregate hw_params callback Jassi Brar
2010-03-10 7:48 ` [PATCH 10/20] ASoC: S3C: I2Sv2: Move register definitions closer to driver Jassi Brar
2010-03-10 7:49 ` [PATCH 11/20] ASoC: SAMSUNG: I2S: Add bit definitions Jassi Brar
2010-03-10 7:49 ` [PATCH 12/20] ASoC: S3C2412: I2S: Debug IMS field Jassi Brar
2010-03-10 7:49 ` [PATCH 13/20] ASoC: S3C2412: I2S: Return correct source clock Jassi Brar
2010-03-10 7:49 ` [PATCH 14/20] ASoC: S3C: I2Sv2: Discard redundant field iis_clk Jassi Brar
2010-03-10 7:49 ` [PATCH 15/20] ASoC: S3C: I2Sv2: Unify i2s_get_clock callback Jassi Brar
2010-03-10 7:49 ` [PATCH 16/20] ASoC: S3C64XX: I2S: Use s3c2412 defines Jassi Brar
2010-03-10 7:49 ` [PATCH 17/20] ASoC: S3C: I2Sv2: Define new field for controller features Jassi Brar
2010-03-10 7:49 ` [PATCH 18/20] ASoC: S3C: I2S: Move set_sysclk callback to common code Jassi Brar
2010-03-10 7:49 ` [PATCH 19/20] ASoC: S3C64XX: IISv4: Add CPU driver Jassi Brar
2010-03-10 7:49 ` [PATCH 20/20] ASoC: SMDK64XX: Switch to IISv4 " Jassi Brar
2010-03-10 11:40 ` Mark Brown
2010-03-10 13:05 ` jassi brar
2010-03-10 11:39 ` [PATCH 19/20] ASoC: S3C64XX: IISv4: Add " Mark Brown
2010-03-10 12:57 ` jassi brar
2010-03-10 11:09 ` [PATCH 17/20] ASoC: S3C: I2Sv2: Define new field for controller features Mark Brown
2010-03-10 11:11 ` Mark Brown
2010-03-10 11:00 ` [PATCH 11/20] ASoC: SAMSUNG: I2S: Add bit definitions Mark Brown
2010-03-10 12:24 ` jassi brar
2010-03-10 12:38 ` Mark Brown
2010-03-10 12:49 ` jassi brar
2010-03-10 12:56 ` Mark Brown
2010-03-10 13:03 ` jassi brar
2010-03-10 14:11 ` Mark Brown
2010-04-27 2:55 ` [PATCH 10/20] ASoC: S3C: I2Sv2: Move register definitions closer to driver Ben Dooks
2010-03-10 14:14 ` [PATCH 09/20] ASoC: S3C: I2Sv2: Segregate hw_params callback Mark Brown
2010-03-10 18:46 ` Mark Brown
2010-03-10 10:51 ` [PATCH 08/20] ASoC: S3C64XX: I2S: Move RATE and FMT defines to header Mark Brown
2010-03-10 12:52 ` jassi brar
2010-03-10 12:59 ` Mark Brown
2010-03-10 13:01 ` [PATCH 07/20] ASoC: s3c64xx-i2s remove unncessary headers Mark Brown
2010-03-10 13:01 ` [PATCH 06/20] ASoC: s3c-i2s-v2 remove unnecessary headers Mark Brown
2010-03-10 13:01 ` [PATCH 05/20] ASoC: S3C: I2Sv2: Unify clock source IDs Mark Brown
2010-03-10 10:49 ` Mark Brown [this message]
2010-03-10 12:38 ` [PATCH 04/20] ASoC: S3C: I2Sv2: Remove S3C_IIS_V2_SUPPORTED define jassi brar
2010-03-10 12:51 ` Mark Brown
2010-03-10 12:31 ` [PATCH 03/20] ASoC: S3C64XX: I2S: Make BCLK independent of sample size Mark Brown
2010-03-10 12:46 ` jassi brar
2010-03-10 13:00 ` Mark Brown
2010-03-10 10:32 ` [PATCH 02/20] ASoC: S3C: I2Sv2: Reject immidiate register value Mark Brown
2010-03-10 12:27 ` jassi brar
2010-03-10 12:48 ` Mark Brown
2010-03-10 12:32 ` [PATCH 01/20] ASoC: S3C: I2Sv2: Add missing semicolon Mark Brown
2010-03-10 13:00 ` Mark Brown
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