On Friday 24 February 2012 06:21 PM, Cousson, Benoit wrote:
On 2/24/2012 12:35 PM, Rajendra Nayak wrote:
On Friday 24 February 2012 05:02 PM, T Krishnamoorthy, Balaji wrote:
On Thu, Feb 23, 2012 at 5:31 PM, Rajendra Nayak<rnayak@xxxxxx> wrote:
Define dt bindings for the ti-omap-hsmmc, and adapt
the driver to extract data (which was earlier passed as
platform_data) from device tree.
Signed-off-by: Rajendra Nayak<rnayak@xxxxxx>
---
.../devicetree/bindings/mmc/ti-omap-hsmmc.txt | 31 +++++++++
drivers/mmc/host/omap_hsmmc.c | 68 ++++++++++++++++++++
2 files changed, 99 insertions(+), 0 deletions(-)
create mode 100644
Documentation/devicetree/bindings/mmc/ti-omap-hsmmc.txt
diff --git a/Documentation/devicetree/bindings/mmc/ti-omap-hsmmc.txt
b/Documentation/devicetree/bindings/mmc/ti-omap-hsmmc.txt
new file mode 100644
index 0000000..e4fa8f0
--- /dev/null
+++ b/Documentation/devicetree/bindings/mmc/ti-omap-hsmmc.txt
@@ -0,0 +1,31 @@
+* TI Highspeed MMC host controller for OMAP
+
+The Highspeed MMC Host Controller on TI OMAP family
+provides an interface for MMC, SD, and SDIO types of memory cards.
+
+Required properties:
+- compatible:
+ Should be "ti,omap2-hsmmc", for OMAP2/3 controllers
omap_hsmmc is applicable for omap2430 and omap3.
omap2420 has non high speed controller mmci-omap -
drivers/mmc/host/omap.c
May be omap3-hsmmc compatible with omap2430 ?
Agree. I think its best in that case for me to define a
compatible "ti,omap2430-hsmmc" for omap2430 and "ti,omap3-hsmmc"
for omap3. Though the IP blocks are same, I cant think of some
common compatible string without causing confusion.
It depends, can we detect that using HW revision?
We don't need to. The driver does not do anything different for
2430 or omap3.
In that case, there is no need to differentiate again with compatible.
Thats perfectly fine. But what *common* compatible string would you
use?
Regards,
Benoit
+ Should be "ti,omap4-hsmmc", for OMAP4 controllers
+- ti,hwmods: Must be "mmc<n>", n is controller instance starting 1
+- reg : should contain hsmmc registers location and length
+
+Optional properties:
+ti,dual-volt: boolean, supports dual voltage cards
+<supply-name>-supply: phandle to the regulator device tree node
+"supply-name" examples are "vmmc", "vmmc_aux" etc
+ti,bus-width: Number of data lines, default assumed is 1 if the
property is missing.
+cd-gpios: GPIOs for card detection
+wp-gpios: GPIOs for write protection
+ti,non-removable: non-removable slot (like eMMC)
+
+Example:
+ mmc1: mmc@0x4809c000 {
+ compatible = "ti,omap4-hsmmc";
+ reg =<0x4809c000 0x400>;
+ ti,hwmods = "mmc1";
+ ti,dual-volt;
+ ti,bus-width =<4>;
+ vmmc-supply =<&vmmc>; /* phandle to regulator node */
+ ti,non-removable;
+ };
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