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[5/5] MMC: mmci: Add required documentation for Device Tree bindings

Message ID 1331734803-17954-6-git-send-email-lee.jones@linaro.org
State New
Headers show

Commit Message

Lee Jones March 14, 2012, 2:20 p.m. UTC 
This provides full documentation detailing each compulsory,
optional and device (variant) specific properties available
for use within the MMCI Device Tree.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
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 Documentation/devicetree/bindings/mmc/mmci.txt |   27 ++++++++++++++++++++++++
 1 files changed, 27 insertions(+), 0 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/mmc/mmci.txt
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diff --git a/Documentation/devicetree/bindings/mmc/mmci.txt b/Documentation/devicetree/bindings/mmc/mmci.txt
new file mode 100644
index 0000000..946f080
--- /dev/null
+++ b/Documentation/devicetree/bindings/mmc/mmci.txt
@@ -0,0 +1,27 @@ 
+* ARM PrimeCell MultiMedia Card Interface (MMCI) PL180/1
+
+The ARM PrimeCell MMCI PL180 and PL181 provides and interface for 
+reading and writing to MultiMedia and SD cards alike.
+
+Required properties:
+- compatible             : contains "arm,pl18x", "arm,primecell".
+- reg                    : contains pl18x registers and length.
+- interrupts             : contains the device IRQ(s).
+- arm,primecell-periphid : contains the PrimeCell Peripheral ID.
+
+Optional properties:
+- ocr_mask               : contains the regulator oscillator mask
+- wp-gpios               : contains any write protect (ro) gpios
+- cd-gpios               : contains any card detection gpios
+- cd-invert              : indicates whether the cd gpio is inverted 
+- clock_frequency        : contains the maximum operating frequency
+- mmc_cap_4_bit_data     : indicates whether device is 4 bit capable
+- mmc_cap_8_bit_data     : indicates whether device is 8 bit capable
+- mmc_cap_mmc_highspeed  : indicates whether MMC is high speed capable
+- mmc_cap_sd_highspeed   : indicates whether SD is high speed capable
+
+ux500 variant specific properties:
+- gpio-en                : contains the level-shifter enable gpio
+- gpio-vsel              : contains the level-shifter voltage select gpio
+- tx_dst_dev_type        : contains the tx destination device (DMA) 
+- rx_src_dev_type        : contains the rx source device (DMA)