All of lore.kernel.org
 help / color / mirror / Atom feed
From: kishon@ti.com (Kishon Vijay Abraham I)
To: linux-arm-kernel@lists.infradead.org
Subject: dra7xx pci driver broken on dra7xx-evm
Date: Thu, 7 Jan 2016 10:47:50 +0530	[thread overview]
Message-ID: <568DF4FE.5010704@ti.com> (raw)
In-Reply-To: <20160106214518.GA6106@localhost.localdomain>

Hi,

On Thursday 07 January 2016 03:15 AM, Richard Cochran wrote:
> 
> The dra7xx-evm box freezes hard at the very first PCI bus access, the
> call to in dra7xx_pcie_readl() in dra7xx_pcie_probe().
> 
> The out-of-tree 3.14.53 TI driver performs a reset via platform data,
> calling omap_device_assert_hardreset() by hook and crook.
> 
> Adding the reset into the mainline driver cures the freeze.
> 
> Question: How on earth is this driver supposed to work?

It doesn't work out of the box in mainline. (Every time I post a PCI patch, I
add the pdata-quirks mechanism to test it). The pdata-quirks mechanism used in
TI tree is not an upstream-able solution. Something like this [1] was done for
performing reset. Not sure the latest state of that. Dan? Suman?

Thanks
Kishon

[1] -> https://patches.linaro.org/33797/
> 
> Thanks,
> Richard
> 

  reply	other threads:[~2016-01-07  5:17 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-01-06 21:45 dra7xx pci driver broken on dra7xx-evm Richard Cochran
2016-01-07  5:17 ` Kishon Vijay Abraham I [this message]
2016-01-07  7:37   ` Richard Cochran
2016-01-07  8:11   ` [PATCH] arm: pci: mark the dra7xx driver as broken Richard Cochran
2016-01-07  8:44     ` Kishon Vijay Abraham I
2016-01-07  9:25       ` Richard Cochran
2016-01-07 14:42         ` Bjorn Helgaas
2016-01-08  6:55           ` Kishon Vijay Abraham I
2016-01-07 21:26   ` dra7xx pci driver broken on dra7xx-evm Suman Anna
2016-01-07 21:26     ` Suman Anna
2016-01-07 21:59     ` Tony Lindgren
2016-01-07 21:59       ` Tony Lindgren
2016-01-08  6:07       ` Kishon Vijay Abraham I
2016-01-08  6:07         ` Kishon Vijay Abraham I
2016-01-08  9:22         ` Richard Cochran
2016-01-08  9:22           ` Richard Cochran
2016-01-11  8:58           ` Kishon Vijay Abraham I
2016-01-11  8:58             ` Kishon Vijay Abraham I

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=568DF4FE.5010704@ti.com \
    --to=kishon@ti.com \
    --cc=linux-arm-kernel@lists.infradead.org \
    /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.