From: Zach Brown <zach.brown@ni.com>
To: ulf.hansson@linaro.org
Cc: adrian.hunter@intel.com, robh+dt@kernel.org,
mark.rutland@arm.com, linux-mmc@vger.kernel.org,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
zach.brown@ni.com
Subject: [PATCH 1/2] mmc: sdhci: dt: Add device tree properties sdhci-caps and sdhci-caps-mask
Date: Fri, 28 Oct 2016 10:56:10 -0500 [thread overview]
Message-ID: <1477670171-30015-2-git-send-email-zach.brown@ni.com> (raw)
In-Reply-To: <1477670171-30015-1-git-send-email-zach.brown@ni.com>
On some systems the sdhci capabilty register is incorrect for one
reason or another.
The sdhci-caps-mask property specifies which bits in the register
are incorrect and should be turned off before using sdhci-caps to turn
on bits.
The sdhci-caps property specifies which bits should be turned on.
Signed-off-by: Zach Brown <zach.brown@ni.com>
---
Documentation/devicetree/bindings/mmc/sdhci.txt | 14 ++++++++++++++
1 file changed, 14 insertions(+)
create mode 100644 Documentation/devicetree/bindings/mmc/sdhci.txt
diff --git a/Documentation/devicetree/bindings/mmc/sdhci.txt b/Documentation/devicetree/bindings/mmc/sdhci.txt
new file mode 100644
index 0000000..0f4f1bb
--- /dev/null
+++ b/Documentation/devicetree/bindings/mmc/sdhci.txt
@@ -0,0 +1,14 @@
+The properties specific for SD host controllers. For properties shared by MMC
+host controllers refer to the mmc[1] bindings.
+
+ [1] Documentation/devicetree/bindings/mmc/mmc.txt
+
+Optional properties:
+- sdhci-caps-mask: The sdhci capabilities register is incorrect. This 64bit
+ property corresponds to the bits in the sdhci capabilty register. If the bit
+ is on in the mask then the bit is incorrect in the register and should be
+ turned off, before applying sdhci-caps.
+- sdhci-caps: The sdhci capabilities register is incorrect. This 64bit
+ property corresponds to the bits in the sdhci capability register. If the
+ bit is on in the property then the bit should be turned on.
+
--
2.7.4
next prev parent reply other threads:[~2016-10-28 15:56 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-28 15:56 [PATCH 0/2] mmc: sdhci: Fix sdhci caps register bits with corrections provided by dt Zach Brown
2016-10-28 15:56 ` Zach Brown [this message]
2016-10-31 6:08 ` [PATCH 1/2] mmc: sdhci: dt: Add device tree properties sdhci-caps and sdhci-caps-mask Rob Herring
2016-10-28 15:56 ` [PATCH 2/2] mmc: sdhci: Use sdhci-caps-mask and sdhci-caps to change the caps read during __sdhci_read_caps Zach Brown
[not found] ` <1477670171-30015-3-git-send-email-zach.brown-acOepvfBmUk@public.gmane.org>
2016-11-02 8:39 ` Adrian Hunter
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