From: grinberg@compulab•co.il (Igor Grinberg)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH 3/4] MTD: pxa3xx_nand: enable multiple chip select support
Date: Thu, 07 Jul 2011 11:59:13 +0300 [thread overview]
Message-ID: <4E157561.6060600@compulab.co.il> (raw)
In-Reply-To: <CALZhoSQgoMS7bSRx1V-tMX+aG4idF6Z-Xr3CorFSXwPMHvacXw@mail.gmail.com>
On 07/07/11 09:26, Lei Wen wrote:
> Hi Igor && Daniel,
>
> On Wed, Jul 6, 2011 at 3:41 PM, Igor Grinberg <grinberg@compulab•co.il> wrote:
>> On 07/04/11 12:25, Lei Wen wrote:
>>
>>> #ifdef CONFIG_PM
>>> @@ -1203,8 +1259,12 @@ static int pxa3xx_nand_resume(struct platform_device *pdev)
>>> {
>>> struct pxa3xx_nand_info *info = platform_get_drvdata(pdev);
>>>
>>> - nand_writel(info, NDTR0CS0, info->host->ndtr0cs0);
>>> - nand_writel(info, NDTR1CS0, info->host->ndtr1cs0);
>>> + /*
>>> + * Directly set the chip select to a invalid value,
>>> + * then the driver would reset the timing according
>>> + * to current chip select at the beginning of cmdfunc
>>> + */
>>> + info->cs = 0xff;
>> Thinking of this for the second (or third) time,
>> If you have keep config enabled and have only one nand chip,
>> this will brake the keep config...
>>
>> Daniel,
>>
>> have you tested the suspend/resume with this patch?
>> (and keep_config on?)
>>
> Do you still have concern with this change?
> If not, I would push the next round of patch set including merging
> patch 3 and 4.
Though I can't test it right now, but yes it looks like it breaks
the keep_config after the resume (actually it disables the keep_config silently).
I think you need here some kind of check if keep_config is enabled.
keep_config is enabled means that only one chip select is used for NAND
and you don't need to reset the timings.
--
Regards,
Igor.
next prev parent reply other threads:[~2011-07-07 8:59 UTC|newest]
Thread overview: 81+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-08 16:00 [PATCH] MTD: pxa3xx_nand: enable multiple chip select support Lei Wen
2011-06-22 11:39 ` Daniel Mack
2011-07-08 17:38 ` Lei Wen
2011-06-22 13:06 ` Daniel Mack
2011-06-23 6:22 ` Lei Wen
2011-07-08 16:09 ` Igor Grinberg
2011-07-08 15:26 ` Lei Wen
2011-06-23 10:44 ` Igor Grinberg
2011-06-25 11:17 ` Lei Wen
2011-06-25 12:32 ` Daniel Mack
2011-06-25 12:51 ` Lei Wen
2011-06-27 13:22 ` Igor Grinberg
2011-06-28 7:32 ` Artem Bityutskiy
2011-06-28 15:12 ` Lei Wen
2011-06-29 3:51 ` [PATCH V3 0/9] pxa3xx_nand: add two " Lei Wen
2011-06-29 9:00 ` Igor Grinberg
2011-06-29 10:20 ` Artem Bityutskiy
2011-07-04 9:27 ` Lei Wen
2011-07-04 9:25 ` [PATCH V4 0/4] " Lei Wen
2011-07-08 3:34 ` [PATCH V5 0/3] " Lei Wen
2011-07-12 10:28 ` [PATCH V6 0/4] " Lei Wen
2011-07-12 14:35 ` [PATCH V7 " Lei Wen
2011-07-15 3:44 ` [PATCH V8 " Lei Wen
2011-07-20 4:51 ` Artem Bityutskiy
2011-07-15 3:44 ` [PATCH V8 1/4] MTD: pxa3xx_nand: enhance suspend and resume routine Lei Wen
2011-07-15 3:44 ` [PATCH V8 2/4] MTD: pxa3xx_nand: convert all printk into dev_* Lei Wen
2011-07-15 3:44 ` [PATCH V8 3/4] MTD: pxa3xx_nand: sperate each chip individual info Lei Wen
2011-07-15 3:44 ` [PATCH V8 4/4] MTD: pxa3xx_nand: enable multiple chip select support Lei Wen
2011-07-12 14:35 ` [PATCH V7 1/4] MTD: pxa3xx_nand: enhance suspend and resume routine Lei Wen
2011-07-13 10:53 ` Sergei Shtylyov
2011-07-12 14:35 ` [PATCH V7 2/4] MTD: pxa3xx_nand: convert all printk into dev_* Lei Wen
2011-07-13 10:57 ` Sergei Shtylyov
2011-07-13 12:41 ` Lei Wen
2011-07-13 14:35 ` Sergei Shtylyov
2011-07-12 14:35 ` [PATCH V7 3/4] MTD: pxa3xx_nand: sperate each chip individual info Lei Wen
2011-07-12 14:35 ` [PATCH V7 4/4] MTD: pxa3xx_nand: enable multiple chip select support Lei Wen
2011-07-12 10:28 ` [PATCH V6 1/4] MTD: pxa3xx_nand: convert all printk into dev_* Lei Wen
2011-07-12 10:28 ` [PATCH V6 2/4] MTD: pxa3xx_nand: sperate each chip individual info Lei Wen
2011-07-12 10:28 ` [PATCH V6 3/4] MTD: pxa3xx_nand: enable multiple chip select support Lei Wen
2011-07-12 10:28 ` [PATCH V6 4/4] MTD: pxa3xx_nand: enhance suspend and resume routine Lei Wen
2011-07-12 11:39 ` Daniel Mack
2011-07-12 12:02 ` Daniel Mack
2011-07-12 15:56 ` Igor Grinberg
2011-07-12 17:35 ` Daniel Mack
2011-07-08 3:34 ` [PATCH 1/3] MTD: pxa3xx_nand: convert all printk into dev_* Lei Wen
2011-07-08 3:34 ` [PATCH 2/3] MTD: pxa3xx_nand: sperate each chip individual info Lei Wen
2011-07-08 3:34 ` [PATCH 3/3] MTD: pxa3xx_nand: enable multiple chip select support Lei Wen
2011-07-04 9:25 ` [PATCH 1/4] MTD: pxa3xx_nand: convert all printk into dev_* Lei Wen
2011-07-04 9:25 ` [PATCH 2/4] MTD: pxa3xx_nand: sperate each chip individual info Lei Wen
2011-07-06 7:29 ` Igor Grinberg
2011-07-04 9:25 ` [PATCH 3/4] MTD: pxa3xx_nand: enable multiple chip select support Lei Wen
2011-07-06 6:53 ` Artem Bityutskiy
2011-07-06 6:54 ` Lei Wen
2011-07-06 7:07 ` Artem Bityutskiy
2011-07-06 7:41 ` Igor Grinberg
2011-07-07 6:26 ` Lei Wen
2011-07-07 8:59 ` Igor Grinberg [this message]
2011-07-07 9:06 ` Lei Wen
2011-07-07 11:23 ` Igor Grinberg
2011-07-11 14:49 ` Daniel Mack
2011-07-11 18:19 ` Igor Grinberg
2011-07-11 18:53 ` Daniel Mack
2011-07-11 19:25 ` Igor Grinberg
2011-07-12 9:40 ` Lei Wen
2011-07-12 9:57 ` Daniel Mack
2011-07-12 10:29 ` Lei Wen
2011-07-12 12:05 ` Daniel Mack
2011-07-12 12:48 ` Daniel Mack
2011-07-12 15:49 ` Igor Grinberg
2011-07-04 9:25 ` [PATCH 4/4] ARM: mmp/pxa: fix nand platform data Lei Wen
2011-06-29 3:51 ` [PATCH 1/9] MTD: pxa3xx_nand: convert all printk into dev_* Lei Wen
2011-06-29 3:51 ` [PATCH 2/9] MTD: pxa3xx_nand: enable multiple chip select support Lei Wen
2011-06-29 7:11 ` Artem Bityutskiy
2011-06-29 7:16 ` Lei Wen
2011-06-29 3:51 ` [PATCH 3/9] ARM: aspenite: fix nand platform data Lei Wen
2011-06-29 3:51 ` [PATCH 4/9] ARM: cm-x300: " Lei Wen
2011-06-29 3:51 ` [PATCH 5/9] ARM: colibri-pxa3xx: " Lei Wen
2011-06-29 3:51 ` [PATCH 6/9] ARM: littleton: " Lei Wen
2011-06-29 3:51 ` [PATCH 7/9] ARM: mxm8x10: " Lei Wen
2011-06-29 3:51 ` [PATCH 8/9] ARM: raumfeld: " Lei Wen
2011-06-29 3:51 ` [PATCH 9/9] ARM: zylonite: " Lei Wen
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