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Message-ID: <20090123195037.GD21237@oksana.dev.rtsoft.ru>
Date: Fri, 23 Jan 2009 22:50:37 +0300
From: Anton Vorontsov <avorontsov@...mvista.com>
To: David Brownell <dbrownell@...rs.sourceforge.net>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
Kumar Gala <galak@...nel.crashing.org>,
Grant Likely <grant.likely@...retlab.ca>,
linuxppc-dev@...abs.org, spi-devel-general@...ts.sourceforge.net,
linux-kernel@...r.kernel.org
Subject: [PATCH 4/6] powerpc: Add mmc-spi-slot bindings
The bindings describes a case where MMC/SD/SDIO slot directly connected
to a SPI bus. Such setups are widely used on embedded PowerPC boards.
The patch also adds the mmc-spi-slot entry to the OpenFirmware modalias
table.
Signed-off-by: Anton Vorontsov <avorontsov@...mvista.com>
---
.../powerpc/dts-bindings/mmc-spi-slot.txt | 23 ++++++++++++++++++++
drivers/of/base.c | 1 +
2 files changed, 24 insertions(+), 0 deletions(-)
create mode 100644 Documentation/powerpc/dts-bindings/mmc-spi-slot.txt
diff --git a/Documentation/powerpc/dts-bindings/mmc-spi-slot.txt b/Documentation/powerpc/dts-bindings/mmc-spi-slot.txt
new file mode 100644
index 0000000..c39ac28
--- /dev/null
+++ b/Documentation/powerpc/dts-bindings/mmc-spi-slot.txt
@@ -0,0 +1,23 @@
+MMC/SD/SDIO slot directly connected to a SPI bus
+
+Required properties:
+- compatible : should be "mmc-spi-slot".
+- reg : should specify SPI address (chip-select number).
+- spi-max-frequency : maximum frequency for this device (Hz).
+- 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.
+- gpios : (optional) may specify GPIOs in this order: Card-Detect GPIO,
+ Write-Protect GPIO.
+
+Example:
+
+ mmc-slot@0 {
+ compatible = "fsl,mpc8323rdb-mmc-slot",
+ "mmc-spi-slot";
+ reg = <0>;
+ gpios = <&qe_pio_d 14 1
+ &qe_pio_d 15 0>;
+ voltage-ranges = <3300 3300>;
+ spi-max-frequency = <50000000>;
+ };
diff --git a/drivers/of/base.c b/drivers/of/base.c
index cd17092..41c5dfd 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -446,6 +446,7 @@ struct of_modalias_table {
};
static struct of_modalias_table of_modalias_table[] = {
{ "fsl,mcu-mpc8349emitx", "mcu-mpc8349emitx" },
+ { "mmc-spi-slot", "mmc_spi" },
};
/**
--
1.5.6.5
--
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