From: soren.brinkmann@xilinx.com (Sören Brinkmann)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 1/2] sdhci-of-arasan: Add quirk and device tree parameter to fake CD bit
Date: Thu, 25 Aug 2016 08:10:47 -0700 [thread overview]
Message-ID: <20160825151047.GO16583@xsjsorenbubuntu> (raw)
In-Reply-To: <1472080984-17373-1-git-send-email-zach.brown@ni.com>
On Wed, 2016-08-24 at 18:23:03 -0500, Zach Brown wrote:
> The sdhci controller on xilinx zynq devices will not function unless
> the cd bit is provided. http://www.xilinx.com/support/answers/61064.html
> In cases where it is impossible to provide the cd bit in hardware,
> setting the controller to test mode and then setting inserted to true
> will get the controller to function with out the cd bit.
>
> The device property "fake-cd" will let the arasan driver know it needs
> to fake the cd bit for the controller inorder for the controller to
> function with a SD card that does not provide the CD bit.
I thought the CD is, if not pinned out, tied off to some valid logic
level. Isn't it enough to specify cd-inverted if needed to make it work
in those cases?
S?ren
next prev parent reply other threads:[~2016-08-25 15:10 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-24 23:23 [PATCH 1/2] sdhci-of-arasan: Add quirk and device tree parameter to fake CD bit Zach Brown
2016-08-24 23:23 ` [PATCH 2/2] " Zach Brown
2016-08-25 1:08 ` Shawn Lin
2016-08-25 6:56 ` kbuild test robot
2016-08-25 8:50 ` Adrian Hunter
2016-08-25 10:37 ` Lars-Peter Clausen
2016-08-25 10:56 ` [PATCH 1/2] " Mark Rutland
2016-08-25 17:15 ` Zach Brown
2016-08-25 18:10 ` Mark Rutland
2016-08-25 18:26 ` Zach Brown
2016-08-25 18:28 ` Mark Rutland
2016-08-25 20:46 ` Zach Brown
2016-08-26 7:42 ` Ulf Hansson
2016-08-26 22:29 ` Zach Brown
2016-08-29 11:21 ` Ulf Hansson
2016-08-25 15:10 ` Sören Brinkmann [this message]
2016-08-25 15:23 ` Lars-Peter Clausen
2016-08-25 15:29 ` Sören Brinkmann
2016-08-25 15:50 ` Lars-Peter Clausen
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