ARM: dts: da850-lcdk: Add NAND to DT

This adds DT support for the NAND connected to the SoC AEMIF.
Passed torture hashing a 40MB file on top of UBIFS using subpages.

Signed-off-by: Karl Beldan <kbeldan@baylibre.com>
[khilman: add back default partitions from an earlier patch]
Signed-off-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>

1 files changed, 83 insertions, 0 deletions

diff --git a/arch/arm/boot/dts/da850-lcdk.dts b/arch/arm/boot/dts/da850-lcdk.dts
index 7563260e95d1..7b8ab21fed6c 100644
--- a/arch/arm/boot/dts/da850-lcdk.dts
+++ b/arch/arm/boot/dts/da850-lcdk.dts
@@ -63,6 +63,27 @@
                         0x04 0x00000110 0x00000ff0
                 >;
         };
+
+        nand_pins: nand_pins {
+                pinctrl-single,bits = <
+                        /* EMA_WAIT[0], EMA_OE, EMA_WE, EMA_CS[3] */
+                        0x1c 0x10110010  0xf0ff00f0
+                        /*
+                         * EMA_D[0], EMA_D[1], EMA_D[2],
+                         * EMA_D[3], EMA_D[4], EMA_D[5],
+                         * EMA_D[6], EMA_D[7]
+                         */
+                        0x24 0x11111111  0xffffffff
+                        /*
+                         * EMA_D[8],  EMA_D[9],  EMA_D[10],
+                         * EMA_D[11], EMA_D[12], EMA_D[13],
+                         * EMA_D[14], EMA_D[15]
+                         */
+                        0x20 0x11111111  0xffffffff
+                        /* EMA_A[1], EMA_A[2] */
+                        0x30 0x01100000  0x0ff00000
+                >;
+        };
 };
 
 &serial2 {
@@ -136,3 +157,65 @@
         tx-num-evt = <32>;
         rx-num-evt = <32>;
 };
+
+&aemif {
+        pinctrl-names = "default";
+        pinctrl-0 = <&nand_pins>;
+        status = "okay";
+        cs3 {
+                #address-cells = <2>;
+                #size-cells = <1>;
+                clock-ranges;
+                ranges;
+
+                ti,cs-chipselect = <3>;
+
+                nand@2000000,0 {
+                        compatible = "ti,davinci-nand";
+                        #address-cells = <1>;
+                        #size-cells = <1>;
+                        reg = <0 0x02000000 0x02000000
+                               1 0x00000000 0x00008000>;
+
+                        ti,davinci-chipselect = <1>;
+                        ti,davinci-mask-ale = <0>;
+                        ti,davinci-mask-cle = <0>;
+                        ti,davinci-mask-chipsel = <0>;
+
+                        ti,davinci-nand-buswidth = <16>;
+                        ti,davinci-ecc-mode = "hw";
+                        ti,davinci-ecc-bits = <4>;
+                        ti,davinci-nand-use-bbt;
+
+                        /*
+                         * The OMAP-L132/L138 Bootloader doc SPRAB41E reads:
+                         * "To boot from NAND Flash, the AIS should be written
+                         * to NAND block 1 (NAND block 0 is not used by default)".
+                         * The same doc mentions that for ROM "Silicon Revision 2.1",
+                         * "Updated NAND boot mode to offer boot from block 0 or block 1".
+                         * However the limitaion is left here by default for compatibility
+                         * with older silicon and because it needs new boot pin settings
+                         * not possible in stock LCDK.
+                         */
+                        partitions {
+                                compatible = "fixed-partitions";
+                                #address-cells = <1>;
+                                #size-cells = <1>;
+
+                                partition@0 {
+                                        label = "u-boot env";
+                                        reg = <0 0x020000>;
+                                };
+                                partition@0x020000 {
+                                        /* The LCDK defaults to booting from this partition */
+                                        label = "u-boot";
+                                        reg = <0x020000 0x080000>;
+                                };
+                                partition@0x0a0000 {
+                                        label = "free space";
+                                        reg = <0x0a0000 0>;
+                                };
+                        };
+                };
+        };
+};