From: Haijun Zhang <Haijun.Zhang@freescale.com>
To: <linux-mmc@vger.kernel.org>, <linuxppc-dev@lists.ozlabs.org>
Cc: scottwood@freescale.com, cjb@laptop.org, AFLEMING@freescale.com,
Haijun Zhang <haijun.zhang@freescale.com>,
cbouatmailru@gmail.com
Subject: [PATCH 1/2 V2] Powerpc: Add voltage support in dts file
Date: Wed, 24 Jul 2013 07:53:33 +0800 [thread overview]
Message-ID: <1374623613-16681-1-git-send-email-Haijun.Zhang@freescale.com> (raw)
eSDHC of T4240 had 1.8v voltage support. Add this node to specify
eSDHC voltage capacity. If this node not specified eSDHC driver
still can read from eSDHC host capacity register.
Signed-off-by: Haijun Zhang <haijun.zhang@freescale.com>
Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
---
changes for v2:
- rewrite the voltage-ranges description
Documentation/devicetree/bindings/mmc/fsl-esdhc.txt | 4 ++++
arch/powerpc/boot/dts/fsl/t4240si-post.dtsi | 1 +
2 files changed, 5 insertions(+)
diff --git a/Documentation/devicetree/bindings/mmc/fsl-esdhc.txt b/Documentation/devicetree/bindings/mmc/fsl-esdhc.txt
index bd9be0b..b7943f3 100644
--- a/Documentation/devicetree/bindings/mmc/fsl-esdhc.txt
+++ b/Documentation/devicetree/bindings/mmc/fsl-esdhc.txt
@@ -19,6 +19,9 @@ Optional properties:
"bus-width = <1>" property.
- sdhci,auto-cmd12: specifies that a controller can only handle auto
CMD12.
+ - voltage-ranges : two cells are required, first cell specifies minimum
+ slot voltage (mV), second cell specifies maximum slot voltage (mV).
+ Several ranges could be specified.
Example:
@@ -29,4 +32,5 @@ sdhci@2e000 {
interrupt-parent = <&ipic>;
/* Filled in by U-Boot */
clock-frequency = <0>;
+ voltage-ranges = <3300 3300>;
};
diff --git a/arch/powerpc/boot/dts/fsl/t4240si-post.dtsi b/arch/powerpc/boot/dts/fsl/t4240si-post.dtsi
index bd611a9..567d0fb 100644
--- a/arch/powerpc/boot/dts/fsl/t4240si-post.dtsi
+++ b/arch/powerpc/boot/dts/fsl/t4240si-post.dtsi
@@ -399,6 +399,7 @@
sdhc@114000 {
compatible = "fsl,t4240-esdhc", "fsl,esdhc";
sdhci,auto-cmd12;
+ voltage-ranges = <1800 1800>;
};
/include/ "qoriq-i2c-0.dtsi"
/include/ "qoriq-i2c-1.dtsi"
--
1.8.0
reply other threads:[~2013-07-24 0:45 UTC|newest]
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