On 2014年11月30日 16:56, Brian Norris wrote:
On Tue, Nov 04, 2014 at 08:47:01PM +0800, Zhou Wang wrote:
Signed-off-by: Zhou Wang <wangzhou.bry@xxxxxxxxx>
---
.../devicetree/bindings/mtd/hisi504-nand.txt | 40 ++++++++++++++++++++
1 file changed, 40 insertions(+)
create mode 100644 Documentation/devicetree/bindings/mtd/hisi504-nand.txt
diff --git a/Documentation/devicetree/bindings/mtd/hisi504-nand.txt b/Documentation/devicetree/bindings/mtd/hisi504-nand.txt
new file mode 100644
index 0000000..c8b3988
--- /dev/null
+++ b/Documentation/devicetree/bindings/mtd/hisi504-nand.txt
@@ -0,0 +1,40 @@
+Hisilicon Hip04 Soc NAND controller DT binding
+
+Required properties:
+- compatible: Should be "hisilicon,504-nfc".
+- reg: The first contains base physical address and size of
+ NAND controller's registers. The second contains base
+ physical address and size of NAND controller's buffer.
+- interrupts: Interrupt number for nfc.
+- nand-bus-width: See nand.txt.
+- nand-ecc-mode: See nand.txt.
Do you support all modes, or just "hw"? Might be worth noting here.
The driver just supports "hw" mode, will modify this.
+- hisi,nand-ecc-bits: ECC bits type support.
+ <0>: none ecc
+ <1>: Can correct 1bit per 512byte.
+ <6>: Can correct 16bits per 1K byte.
You should re-use the nand-ecc-strength and nand-ecc-step-size
properties here. So you'll support these options:
nand-ecc-strength=0 nand-ecc-step-size=<don't care>
nand-ecc-strength=1 nand-ecc-step-size=512
nand-ecc-strength=16 nand-ecc-step-size=1024
Thanks, will modify this!
+- #address-cells: partition address, should be set 1.
+- #size-cells: partition size, should be set 1.
+
+Flash chip may optionally contain additional sub-nodes describing partitions of
+the address space. See partition.txt for more detail.
+
+Example:
+
+ nand: nand@4020000 {
+ compatible = "hisilicon,504-nfc";
+ reg = <0x4020000 0x10000>, <0x5000000 0x1000>;
+ interrupts = <0 379 4>;
+ nand-bus-width = <8>;
+ nand-ecc-mode = "hw";
+ hisi,nand-ecc-bits = <1>;
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ partition@0 {
+ label = "nand_text";
+ reg = <0x00000000 0x00400000>;
+ };
+
+ ...
+
+ };
Brian
Thanks,
Zhou Wang
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