Hi Mark,

On Fri, Feb 08, 2013 at 11:55:09, Manjunathappa, Prakash wrote:

Hi Mark,

On Thu, Feb 07, 2013 at 16:16:56, Mark Rutland wrote:

quoted

Hello,

I have a couple of comments on the dt bindings and the way it's parsed.

Thanks for your review comments.

quoted

On Thu, Feb 07, 2013 at 07:57:04AM +0000, Manjunathappa, Prakash wrote:

quoted

Adds device tree support for davinci_mmc. Also add binding documentation.
Tested in non-dma PIO mode and without GPIO card_detect/write_protect
option because of dependencies on EDMA and GPIO module DT support.

Signed-off-by: Manjunathappa, Prakash <redacted>
Cc: linux-mmc at vger.kernel.org
Cc: linux-arm-kernel at lists.infradead.org
Cc: linux-kernel at vger.kernel.org
Cc: davinci-linux-open-source at linux.davincidsp.com
Cc: devicetree-discuss at lists.ozlabs.org
Cc: cjb at laptop.org
Cc: Sekhar Nori <redacted>
Cc: mporter at ti.com
---
Since v1:
Modified DT parse function to take default values and accomodate controller
version in compatible field.

 .../devicetree/bindings/mmc/davinci_mmc.txt        |   30 ++++++++
 drivers/mmc/host/davinci_mmc.c                     |   70 +++++++++++++++++++-
 2 files changed, 99 insertions(+), 1 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/mmc/davinci_mmc.txt

diff --git a/Documentation/devicetree/bindings/mmc/davinci_mmc.txt b/Documentation/devicetree/bindings/mmc/davinci_mmc.txt
new file mode 100644
index 0000000..6717ab1
--- /dev/null
+++ b/Documentation/devicetree/bindings/mmc/davinci_mmc.txt

@@ -0,0 +1,30 @@
+* TI Highspeed MMC host controller for DaVinci
+
+The Highspeed MMC Host Controller on TI DaVinci family
+provides an interface for MMC, SD and SDIO types of memory cards.
+
+This file documents the properties used by the davinci_mmc driver.
+
+Required properties:
+- compatible:
+ Should be "ti,davinci-mmc-da830": for da830, da850, dm365
+ Should be "ti,davinci-mmc-dm355": for dm355, dm644x
+
+Optional properties:
+- bus-width: Number of data lines, can be <4>, or <8>, default <1>
+- max-frequency: Maximum operating clock frequency, default 25MHz.
+- mmc-cap-mmc-highspeed: Indicates support for MMC in high speed mode
+- mmc-cap-sd-highspeed: Indicates support for SD in high speed mode

I thought the last two were derivable from max-frequency?

Yes, but I see below comment that it doesnot support MMC/SD.
arch/arm/mach-davinci/devices.c: davinci_setup_mmc
	   "
         * FIXME dm6441 (no MMC/SD), dm357 (one), and dm335 (two) are
         * not handled right here ...
         */"
I was wondering how do we support such platforms, so I thought it is necessary
to have these. But I see that on da850-evm even on skipping above flags EVM is able
to detect card, does it mean there is no way to specify "no SD/MMC" capability?
I will remove these and decide highspeed capability based on max-frequency.

Since this comment also applies for existing non-DT driver, I will plan to take
up activity later. For now I will submit next version of DT support patch
excluding highspeed card capability.

Thanks,
Prakash

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