[PATCH v13 1/2] ARM: dts: vf610twr: add NAND flash controller peripherial

[Stefan Agner]

This adds the NAND flash controller (NFC) peripherial. The driver
supports the SLC NAND chips found on Freescale's Vybrid Tower System
Module. The Micron NAND chip on the module needs 4-bit ECC per 512
byte page. Use 24-bit ECC per 2k page, which is supported by the
driver.

Signed-off-by: Bill Pringlemeir <bpringlemeir at nbsps.com>
Reviewed-by: Brian Norris <computersforpeace at gmail.com>
Signed-off-by: Stefan Agner <stefan at agner.ch>
---
Hi Shawn,

This are the rebased dt changes of the Vybrid MTD NAND driver
patchset. The driver part has recently been merged:
https://lkml.org/lkml/2015/9/2/678

The driver is lined up fo 4.4, I hope those changes make it into
4.4 as well.

Changes since v12:
- Rebased (and fixed merge conflict)
- Fix indent

 arch/arm/boot/dts/vf610-twr.dts | 47 +++++++++++++++++++++++++++++++++++++++++
 arch/arm/boot/dts/vfxxx.dtsi    | 11 ++++++++++
 2 files changed, 58 insertions(+)

diff --git a/arch/arm/boot/dts/vf610-twr.dts b/arch/arm/boot/dts/vf610-twr.dts
index 375ab23..5438ee4 100644
--- a/arch/arm/boot/dts/vf610-twr.dts
+++ b/arch/arm/boot/dts/vf610-twr.dts
@@ -237,6 +237,33 @@
 			>;
 		};
 
+		pinctrl_nfc: nfcgrp {
+			fsl,pins = <
+				VF610_PAD_PTD31__NF_IO15	0x28df
+				VF610_PAD_PTD30__NF_IO14	0x28df
+				VF610_PAD_PTD29__NF_IO13	0x28df
+				VF610_PAD_PTD28__NF_IO12	0x28df
+				VF610_PAD_PTD27__NF_IO11	0x28df
+				VF610_PAD_PTD26__NF_IO10	0x28df
+				VF610_PAD_PTD25__NF_IO9		0x28df
+				VF610_PAD_PTD24__NF_IO8		0x28df
+				VF610_PAD_PTD23__NF_IO7		0x28df
+				VF610_PAD_PTD22__NF_IO6		0x28df
+				VF610_PAD_PTD21__NF_IO5		0x28df
+				VF610_PAD_PTD20__NF_IO4		0x28df
+				VF610_PAD_PTD19__NF_IO3		0x28df
+				VF610_PAD_PTD18__NF_IO2		0x28df
+				VF610_PAD_PTD17__NF_IO1		0x28df
+				VF610_PAD_PTD16__NF_IO0		0x28df
+				VF610_PAD_PTB24__NF_WE_B	0x28c2
+				VF610_PAD_PTB25__NF_CE0_B	0x28c2
+				VF610_PAD_PTB27__NF_RE_B	0x28c2
+				VF610_PAD_PTC26__NF_RB_B	0x283d
+				VF610_PAD_PTC27__NF_ALE		0x28c2
+				VF610_PAD_PTC28__NF_CLE		0x28c2
+			>;
+		};
+
 		pinctrl_pwm0: pwm0grp {
 			fsl,pins = <
 				VF610_PAD_PTB0__FTM0_CH0		0x1582
@@ -274,6 +301,26 @@
 	};
 };
 
+&nfc {
+	assigned-clocks = <&clks VF610_CLK_NFC>;
+	assigned-clock-rates = <33000000>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_nfc>;
+	status = "okay";
+
+	nand at 0 {
+		compatible = "fsl,vf610-nfc-nandcs";
+		reg = <0>;
+		#address-cells = <1>;
+		#size-cells = <1>;
+		nand-bus-width = <16>;
+		nand-ecc-mode = "hw";
+		nand-ecc-strength = <24>;
+		nand-ecc-step-size = <2048>;
+		nand-on-flash-bbt;
+	};
+};
+
 &pwm0 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_pwm0>;
diff --git a/arch/arm/boot/dts/vfxxx.dtsi b/arch/arm/boot/dts/vfxxx.dtsi
index 6865137..6736bae 100644
--- a/arch/arm/boot/dts/vfxxx.dtsi
+++ b/arch/arm/boot/dts/vfxxx.dtsi
@@ -564,6 +564,17 @@
 				status = "disabled";
 			};
 
+			nfc: nand at 400e0000 {
+				#address-cells = <1>;
+				#size-cells = <0>;
+				compatible = "fsl,vf610-nfc";
+				reg = <0x400e0000 0x4000>;
+				interrupts = <83 IRQ_TYPE_LEVEL_HIGH>;
+				clocks = <&clks VF610_CLK_NFC>;
+				clock-names = "nfc";
+				status = "disabled";
+			};
+
 			i2c2: i2c at 400e6000 {
 				#address-cells = <1>;
 				#size-cells = <0>;
-- 
2.6.1