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Subject[PATCH v2 2/6] mtd: rawnand: tegra: add devicetree binding
Date
From: Lucas Stach <dev@lynxeye.de>

This adds the devicetree binding for the Tegra 2 NAND flash
controller.

Signed-off-by: Lucas Stach <dev@lynxeye.de>
Signed-off-by: Stefan Agner <stefan@agner.ch>
---
.../bindings/mtd/nvidia,tegra20-nand.txt | 62 +++++++++++++++++++
1 file changed, 62 insertions(+)
create mode 100644 Documentation/devicetree/bindings/mtd/nvidia,tegra20-nand.txt

diff --git a/Documentation/devicetree/bindings/mtd/nvidia,tegra20-nand.txt b/Documentation/devicetree/bindings/mtd/nvidia,tegra20-nand.txt
new file mode 100644
index 000000000000..49e472af1b39
--- /dev/null
+++ b/Documentation/devicetree/bindings/mtd/nvidia,tegra20-nand.txt
@@ -0,0 +1,62 @@
+NVIDIA Tegra NAND Flash controller
+
+Required properties:
+- compatible: Must be one of:
+ - "nvidia,tegra20-nand"
+- reg: MMIO address range
+- interrupts: interrupt output of the NFC controller
+- clocks: Must contain an entry for each entry in clock-names.
+ See ../clocks/clock-bindings.txt for details.
+- clock-names: Must include the following entries:
+ - nand
+- resets: Must contain an entry for each entry in reset-names.
+ See ../reset/reset.txt for details.
+- reset-names: Must include the following entries:
+ - nand
+
+Optional children nodes:
+Individual NAND chips are children of the NAND controller node. Currently
+only one NAND chip supported.
+
+Required children node properties:
+- reg: An integer ranging from 1 to 6 representing the CS line to use.
+
+Optional children node properties:
+- nand-ecc-mode: String, operation mode of the NAND ecc mode. "hw" by default
+- nand-ecc-algo: string, algorithm of NAND ECC.
+ Supported values are: "rs", "bch".
+- nand-bus-width : 8 or 16 bus width if not present 8
+- nand-on-flash-bbt: boolean to enable on flash bbt option if not present false
+- nand-ecc-strength: integer representing the number of bits to correct
+ per ECC step. Supported strength using HW ECC modes are:
+ - RS: 4, 6, 8
+ - BCH: 4, 8, 14, 16
+- nand-ecc-step-size: integer representing the number of data bytes
+ that are covered by a single ECC step. Must be 512.
+- wp-gpios: GPIO specifier for the write protect pin.
+
+Optional child node of NAND chip nodes:
+Partitions: see partition.txt
+
+ Example:
+ nand@70008000 {
+ compatible = "nvidia,tegra20-nand";
+ reg = <0x70008000 0x100>;
+ interrupts = <GIC_SPI 24 IRQ_TYPE_LEVEL_HIGH>;
+ clocks = <&tegra_car TEGRA20_CLK_NDFLASH>;
+ clock-names = "nand";
+ resets = <&tegra_car 13>;
+ reset-names = "nand";
+
+ nand-chip@0 {
+ reg = <0>;
+ #address-cells = <1>;
+ #size-cells = <1>;
+ nand-bus-width = <8>;
+ nand-on-flash-bbt;
+ nand-ecc-algo = "bch";
+ nand-ecc-step-size = <512>;
+ nand-ecc-strength = <8>;
+ wp-gpios = <&gpio TEGRA_GPIO(S, 0) GPIO_ACTIVE_LOW>;
+ };
+ };
--
2.17.0
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