Subject: [PATCH 10/12] mtd: nand: davinci: don't set timings if AEMIF is used

From: [email-masked] (Santosh Shilimkar)
Date: Mon, 18 Nov 2013 09:08:13 -0500

On Monday 18 November 2013 06:35 AM, Grygorii Strashko wrote:
> On 11/12/2013 06:13 PM, Santosh Shilimkar wrote:
>> On Monday 11 November 2013 12:10 PM, Khoronzhuk, Ivan wrote:
>>> If Davinci AEMIF is used we don't need to set timings and bus width.
>>> It is done by AEMIF driver (drivers/memory/davinci-aemfi.c).
>>>
>>> Signed-off-by: Ivan Khoronzhuk <[email-masked]>
>>> ---
>>>   drivers/mtd/nand/davinci_nand.c |   22 +++++++++++++++-------
>>>   1 file changed, 15 insertions(+), 7 deletions(-)
>>>
>>> diff --git a/drivers/mtd/nand/davinci_nand.c b/drivers/mtd/nand/davinci_nand.c
>>> index 4705214..879e915 100644
>>> --- a/drivers/mtd/nand/davinci_nand.c
>>> +++ b/drivers/mtd/nand/davinci_nand.c
>>> @@ -742,27 +742,35 @@ static int __init nand_davinci_probe(struct platform_device *pdev)
>>>                  goto err_clk_enable;
>>>          }
>>>
>>> +#if !IS_ENABLED(CONFIG_TI_DAVINCI_AEMIF)
>>>
>> Instead above #if, just use a variable.
>>     bool aemif = IS_ENABLED(CONFIG_TI_DAVINCI_AEMIF) and then skip
>> the below code. #if block in the middle of the code looks ugly.
> 
> Yes, this is the hack.
> The problem is that this part of code contains the call of Davinci platform function davinci_aemif_setup_timing() which is not accessible if Kernel is built for Keystone only.
> That's why "#if" has been used.
> 
> This part of code has to be removed together with Davinci aemif platform code (aemif.c), once Davinci will be converted to DT and use
> new driver.
> 
> The corresponding comment can be added here. Is it ok?
> 
Thats more or less what I proposed in another reply. Lets clearly
document it on why such a check was added.

Regards,
Santosh