All of lore.kernel.org
 help / color / mirror / Atom feed
From: Ohad Ben-Cohen <ohad@wizery.com>
To: zhangfei gao <zhangfei.gao@gmail.com>
Cc: Bing Zhao <bzhao@marvell.com>, Daniel Drake <dsd@laptop.org>,
	"linux-mmc@vger.kernel.org" <linux-mmc@vger.kernel.org>,
	Mike Rapoport <mike@compulab.co.il>,
	Zhangfei Gao <zgao6@marvell.com>
Subject: Re: MMC runtime PM patches break libertas probe
Date: Fri, 10 Jun 2011 07:28:41 +0300	[thread overview]
Message-ID: <BANLkTinDe6fOavZZ+1c1OKS7XMf_J5YhaA@mail.gmail.com> (raw)
In-Reply-To: <BANLkTi=KjP9sUD0+QjDrJro0JXW4A+zOKg@mail.gmail.com>

Hi Zhangfei,

On Fri, Jun 10, 2011 at 5:02 AM, zhangfei gao <zhangfei.gao@gmail.com> wrote:
> Here is answer got from the sd8686 maintainer.
>
> For 8686, the SDIO state machine can only handle init sequence (CMD5,
> 5, 3, 7) from host once. If host sends another init sequence, it will
> not be able to handle CMD5 and causes the SDIO block to hang. Chips
> that are newer than 8686 will be able to handle multiple init sequence
> from host.

Thanks for the reply !

> So yes, for 8686, an IO reset is needed before host can send a new set
> of init sequence.

But if we're powering down and up the device first, then the init
sequence is considered the first one, and then we don't need an IO
reset, right ? That was what we wondered about.

Thanks,
Ohad.

  reply	other threads:[~2011-06-10  4:29 UTC|newest]

Thread overview: 48+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-10-31 14:29 MMC runtime PM patches break libertas probe Daniel Drake
2010-10-31 14:42 ` Ohad Ben-Cohen
2010-10-31 14:55   ` Daniel Drake
2010-10-31 15:08     ` Ohad Ben-Cohen
2010-10-31 15:10       ` Daniel Drake
2010-10-31 15:16         ` Ohad Ben-Cohen
2010-10-31 15:21           ` Daniel Drake
2010-10-31 15:21           ` Daniel Drake
2010-10-31 15:27             ` Ohad Ben-Cohen
2010-10-31 15:57               ` Daniel Drake
2010-10-31 16:16                 ` Ohad Ben-Cohen
2010-10-31 16:24                   ` Daniel Drake
2010-10-31 19:06                     ` Ohad Ben-Cohen
2010-11-01  8:27                       ` Ohad Ben-Cohen
2010-11-06 21:19                         ` Daniel Drake
2010-11-07  1:48                           ` Nicolas Pitre
2010-11-07 10:19                             ` Daniel Drake
2010-11-07 15:12                               ` Nicolas Pitre
2010-11-07 10:42                           ` Ohad Ben-Cohen
2010-11-07 10:51                             ` Daniel Drake
2010-11-07 13:17                               ` Ohad Ben-Cohen
2010-11-16 13:22                         ` Ohad Ben-Cohen
2010-11-16 14:29                           ` Daniel Drake
2010-11-16 14:49                             ` Ohad Ben-Cohen
2010-11-17  6:46                               ` Mike Rapoport
2010-11-17  7:29                                 ` Ohad Ben-Cohen
2010-11-17 14:54                                   ` Nicolas Pitre
2010-11-16 17:17                           ` Arnd Hannemann
2010-11-16 20:58                             ` Ohad Ben-Cohen
2010-11-16 21:16                               ` Arnd Hannemann
2010-11-16 22:26                                 ` Ohad Ben-Cohen
2011-05-29 16:21                       ` Daniel Drake
2011-05-30  6:52                         ` Ohad Ben-Cohen
2011-05-30  7:01                           ` Daniel Drake
2011-05-30  7:32                             ` Ohad Ben-Cohen
2011-05-30 11:04                               ` zhangfei gao
2011-05-30 11:16                                 ` Ohad Ben-Cohen
2011-06-02  8:39                                   ` Bing Zhao
2011-06-02 18:25                                     ` Ohad Ben-Cohen
2011-06-03 22:28                                       ` Bing Zhao
2011-06-03 22:52                                         ` Ohad Ben-Cohen
2011-06-07 14:34                                           ` Arnd Hannemann
2011-06-07 14:45                                             ` Ohad Ben-Cohen
2011-06-08 14:34                                           ` Ohad Ben-Cohen
2011-06-10  2:02                                             ` zhangfei gao
2011-06-10  4:28                                               ` Ohad Ben-Cohen [this message]
2011-06-11  2:33                                                 ` zhangfei gao
2011-06-11  9:03                                                   ` Ohad Ben-Cohen

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=BANLkTinDe6fOavZZ+1c1OKS7XMf_J5YhaA@mail.gmail.com \
    --to=ohad@wizery.com \
    --cc=bzhao@marvell.com \
    --cc=dsd@laptop.org \
    --cc=linux-mmc@vger.kernel.org \
    --cc=mike@compulab.co.il \
    --cc=zgao6@marvell.com \
    --cc=zhangfei.gao@gmail.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.