From: Philip Avinash <avinashphilip@xxxxxx>
NAND flash connected in am335x-evm on GPMC controller. This patch adds
device tree node in am3355-evm with GPMC contoller timing for NAND flash
interface, NAND partition table, ECC scheme, elm handle id.
Signed-off-by: Philip Avinash <avinashphilip@xxxxxx>
Signed-off-by: Gupta, Pekon <pekon@xxxxxx>
---
arch/arm/boot/dts/am335x-evm.dts | 105 +++++++++++++++++++++++++++++++++++++++
1 file changed, 105 insertions(+)
diff --git a/arch/arm/boot/dts/am335x-evm.dts b/arch/arm/boot/dts/am335x-evm.dts
index 0423298..7d2be9c 100644
--- a/arch/arm/boot/dts/am335x-evm.dts
+++ b/arch/arm/boot/dts/am335x-evm.dts
@@ -44,6 +44,26 @@
0x154 0x27 /* spi0_d0.gpio0_3, INPUT | MODE7 */
>;
};
+
+ nandflash_pins_s0: nandflash_pins_s0 {
+ pinctrl-single,pins = <
+ 0x0 0x30 /* gpmc_ad0.gpmc_ad0, INPUT | PULLUP | MODE0 */
+ 0x4 0x30 /* gpmc_ad1.gpmc_ad1, INPUT | PULLUP | MODE0 */
+ 0x8 0x30 /* gpmc_ad2.gpmc_ad2, INPUT | PULLUP | MODE0 */
+ 0xc 0x30 /* gpmc_ad3.gpmc_ad3, INPUT | PULLUP | MODE0 */
+ 0x10 0x30 /* gpmc_ad4.gpmc_ad4, INPUT | PULLUP | MODE0 */
+ 0x14 0x30 /* gpmc_ad5.gpmc_ad5, INPUT | PULLUP | MODE0 */
+ 0x18 0x30 /* gpmc_ad6.gpmc_ad6, INPUT | PULLUP | MODE0 */
+ 0x1c 0x30 /* gpmc_ad7.gpmc_ad7, INPUT | PULLUP | MODE0 */
+ 0x70 0x30 /* gpmc_wait0.gpmc_wait0, INPUT | PULLUP | MODE0 */
+ 0x74 0x37 /* gpmc_wpn.gpio0_30, INPUT | PULLUP | MODE7 */
+ 0x7c 0x8 /* gpmc_csn0.gpmc_csn0, PULL DISA */
+ 0x90 0x8 /* gpmc_advn_ale.gpmc_advn_ale, PULL DISA */
+ 0x94 0x8 /* gpmc_oen_ren.gpmc_oen_ren, PULL DISA */
+ 0x98 0x8 /* gpmc_wen.gpmc_wen, PULL DISA */
+ 0x9c 0x8 /* gpmc_be0n_cle.gpmc_be0n_cle, PULL DISA */
+ >;
+ };
};
ocp {
@@ -102,6 +122,91 @@
reg = <0x48>;
};
};
+
+ elm: elm@48080000 {
+ status = "okay";
+ };
+
+ gpmc: gpmc@50000000 {
+ status = "okay";
+ pinctrl-names = "default";
+ pinctrl-0 = <&nandflash_pins_s0>;
+ ranges = <0 0 0x08000000 0x10000000>; /* CS0: NAND */
+ nand@0,0 {
+ reg = <0 0 0>; /* CS0, offset 0 */
+ nand-bus-width = <8>;
+ ti,nand-ecc-opt = "bch8";
+ gpmc,device-nand = "true";
+ gpmc,device-width = <1>;
+ gpmc,sync-clk-ps = <0>;
+ gpmc,cs-on-ns = <0>;
+ gpmc,cs-rd-off-ns = <44>;
+ gpmc,cs-wr-off-ns = <44>;
+ gpmc,adv-on-ns = <6>;
+ gpmc,adv-rd-off-ns = <34>;
+ gpmc,adv-wr-off-ns = <44>;
+ gpmc,we-on-ns = <0>;
+ gpmc,we-off-ns = <40>;
+ gpmc,oe-on-ns = <0>;
+ gpmc,oe-off-ns = <54>;
+ gpmc,access-ns = <64>;
+ gpmc,rd-cycle-ns = <82>;
+ gpmc,wr-cycle-ns = <82>;
+ gpmc,wait-on-read = "true";
+ gpmc,wait-on-write = "true";
+ gpmc,bus-turnaround-ns = <0>;
+ gpmc,cycle2cycle-delay-ns = <0>;
+ gpmc,clk-activation-ns = <0>;
+ gpmc,wait-monitoring-ns = <0>;
+ gpmc,wr-access-ns = <40>;
+ gpmc,wr-data-mux-bus-ns = <0>;
+
+ #address-cells = <1>;
+ #size-cells = <1>;
+ elm_id = <&elm>;
+
+ /* MTD partition table */
+ partition@0 {
+ label = "SPL1";
+ reg = <0x00000000 0x000020000>;
+ };
+
+ partition@1 {
+ label = "SPL2";
+ reg = <0x00020000 0x00020000>;
+ };
+
+ partition@2 {
+ label = "SPL3";
+ reg = <0x00040000 0x00020000>;
+ };
+
+ partition@3 {
+ label = "SPL4";
+ reg = <0x00060000 0x00020000>;
+ };
+
+ partition@4 {
+ label = "U-boot";
+ reg = <0x00080000 0x001e0000>;
+ };
+
+ partition@5 {
+ label = "environment";
+ reg = <0x00260000 0x00020000>;
+ };
+
+ partition@6 {
+ label = "Kernel";
+ reg = <0x00280000 0x00500000>;
+ };
+
+ partition@7 {
+ label = "File-System";
+ reg = <0x00780000 0x0F880000>;
+ };
+ };
+ };
};
vbat: fixedregulator@0 {
--
1.8.1
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