Hi,
On 12/09/18 17:09, LYB wrote:
> Hi.
> I'm not sure that is the exact place to ask, but...
> I'm trying to connect an external NAND to the GPMC pins. I updated the device
> tree for that, and the NAND is identified correctly.
> Yet, later during the nand init, the partitions, as defined in the device
> tree, are not created.
> I used to the same partitions definition on a different AM335x board, which
> used kernel version 3.x, while BBB uses now 4.14.x, and the NAND support code
> was changed a lot.
> My device tree looks quite fine, as much as I can tell (see below).
> Again, the nand works, it is being identified, all signals work correctly
> (had to remove one of the MMC's for that). the issue is linux creating
> partitions.
> does any one have any clue about it?
Could you please post the full u-boot+kernel bootlog?
see some comments below.
>
> |
> &am33xx_pinmux {
> bbcape_nand_flash_pins: bbcape_nand_flash_pins {
> pinctrl-single,pins = <
> 0x00 (MUX_MODE0 | PIN_INPUT_PULLUP)/* gpmc_ad0.gpmc_ad0 */
> 0x04 (MUX_MODE0 | PIN_INPUT_PULLUP)/* gpmc_ad1.gpmc_ad1 */
> 0x08 (MUX_MODE0 | PIN_INPUT_PULLUP)/* gpmc_ad2.gpmc_ad2 */
> 0x0c (MUX_MODE0 | PIN_INPUT_PULLUP)/* gpmc_ad3.gpmc_ad3 */
> 0x10 (MUX_MODE0 | PIN_INPUT_PULLUP)/* gpmc_ad4.gpmc_ad4 */
> 0x14 (MUX_MODE0 | PIN_INPUT_PULLUP)/* gpmc_ad5.gpmc_ad5 */
> 0x18 (MUX_MODE0 | PIN_INPUT_PULLUP)/* gpmc_ad6.gpmc_ad6 */
> 0x1c (MUX_MODE0 | PIN_INPUT_PULLUP)/* gpmc_ad7.gpmc_ad7 */
> 0x70 (MUX_MODE0 | PIN_INPUT_PULLUP )/* gpmc_wait0.gpmc_wait0 */
> 0x74 (MUX_MODE0 | PIN_OUTPUT_PULLUP)/* gpmc_wpn.gpmc_wpn */
> 0x7c (MUX_MODE0 | PIN_OUTPUT_PULLUP)/* gpmc_csn0.gpmc_csn0 */
> 0x90 (MUX_MODE0 | PIN_OUTPUT)/* gpmc_advn_ale.gpmc_advn_ale */
> 0x94 (MUX_MODE0 | PIN_OUTPUT)/* gpmc_oen_ren.gpmc_oen_ren */
> 0x98 (MUX_MODE0 | PIN_OUTPUT)/* gpmc_wen.gpmc_wen */
> 0x9c (MUX_MODE0 | PIN_OUTPUT)/* gpmc_be0n_cle.gpmc_be0n_cle */
>>;
> };
> };
>
> &elm {
> status = "okay";
> };
>
> &gpmc {
> status = "okay";
> ranges = <0 0 0x01000000 0x10000000>;/* address range = 16MB (minimum GPMC
> partition) */
> nand@0,0 {
> compatible = "ti,omap2-nand";
> reg = <0 0 4>;/* device IO registers */
> pinctrl-names = "default";
On v4.14 and later you can try adding
interrupt-parent = <&gpmc>;
interrupts = <0 IRQ_TYPE_NONE>, /* fifoevent */
<1 IRQ_TYPE_NONE>; /* termcount */
rb-gpios = <&gpmc 0 GPIO_ACTIVE_HIGH>; /* gpmc_wait0 */
ti,nand-xfer-type = "prefetch-irq";
cheers,
-roger
> pinctrl-0 = <&bbcape_nand_flash_pins>;
> ti,nand-ecc-opt = "bch8";
> ti,elm-id = <&elm>;
> /* generic bindings */
> nand-bus-width = <8>;
> /* vendor specific bindings */
> gpmc,device-width = <2>;
> gpmc,sync-clk-ps = <0>;
> gpmc,cs-on-ns = <0>;
> gpmc,cs-rd-off-ns = <80>;
> gpmc,cs-wr-off-ns = <80>;
> gpmc,adv-on-ns = <0>;
> gpmc,adv-rd-off-ns = <80>;
> gpmc,adv-wr-off-ns = <80>;
> gpmc,we-on-ns = <20>;
> gpmc,we-off-ns = <60>;
> gpmc,oe-on-ns = <20>;
> gpmc,oe-off-ns = <60>;
> gpmc,access-ns = <40>;
> gpmc,rd-cycle-ns = <80>;
> gpmc,wr-cycle-ns = <80>;
> gpmc,wait-pin = <0>;
> gpmc,wait-on-read;
> gpmc,wait-on-write;
> 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>;
> /* MTD partition table */
> /* All SPL-* partitions are sized to minimal length
> * which can be independently programmable. For
> * NAND flash this is equal to size of erase-block */
> #address-cells = <1>;
> #size-cells = <1>;
> partition@0 {
> label = "NAND.SPL";
> reg = <0x00000000 0x00040000>;
> };
> partition@1 {
> label = "NAND.SPL.backup1";
> reg = <0x00040000 0x00040000>;
> };
> partition@2 {
> label = "NAND.SPL.backup2";
> reg = <0x00080000 0x00040000>;
> };
> partition@3 {
> label = "NAND.SPL.backup3";
> reg = <0x000c0000 0x00040000>;
> };
> partition@4 {
> label = "NAND.u-boot-spl-os";
> reg = <0x00100000 0x00080000>;
> };
> partition@5 {
> label = "NAND.u-boot";
> reg = <0x00180000 0x00100000>;
> };
> partition@6 {
> label = "NAND.u-boot-env";
> reg = <0x00280000 0x00040000>;
> };
> partition@7 {
> label = "NAND.u-boot-env.backup1";
> reg = <0x002c0000 0x00040000>;
> };
> partition@8 {
> label = "NAND.kernel";
> reg = <0x00300000 0x00700000>;
> };
> partition@9 {
> label = "NAND.file-system";
> reg = <0x00a00000 0x1f600000>;
> };
> };
> };
>
> |
>
>
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