[PATCH v2 8/9] ARM: dts: at91: sam9x60ek: Enable NAND support
Eugen.Hristev at microchip.com
Eugen.Hristev at microchip.com
Wed Aug 31 15:31:09 CEST 2022
On 8/31/22 4:14 PM, Michael Nazzareno Trimarchi wrote:
> Hi
>
> On Mon, Aug 29, 2022 at 8:20 AM Balamanikandan Gunasundar
> <balamanikandan.gunasundar at microchip.com> wrote:
>>
>> Enable the EBI and NAND flash controller. Define the pinctrl and
>> partition table
>>
>> Signed-off-by: Balamanikandan Gunasundar <balamanikandan.gunasundar at microchip.com>
>> ---
>> arch/arm/dts/sam9x60ek.dts | 103 +++++++++++++++++++++++++++++++++++++
>> 1 file changed, 103 insertions(+)
>>
>> diff --git a/arch/arm/dts/sam9x60ek.dts b/arch/arm/dts/sam9x60ek.dts
>> index 54c694bd78..6cb81dd90f 100644
>> --- a/arch/arm/dts/sam9x60ek.dts
>> +++ b/arch/arm/dts/sam9x60ek.dts
>> @@ -80,6 +80,44 @@
>> };
>>
>> pinctrl {
>> + nand {
>
> I can see two tabs here. You don't need it. The indentation go far on the right
>
>> + pinctrl_nand_oe_we: nand-oe-we-0 {
>> + atmel,pins =
>> + <AT91_PIOD 0 AT91_PERIPH_A (AT91_PINCTRL_NONE | AT91_PINCTRL_SLEWRATE_DIS)
>> + AT91_PIOD 1 AT91_PERIPH_A (AT91_PINCTRL_NONE | AT91_PINCTRL_SLEWRATE_DIS)>;
>> + };
>> +
>> + pinctrl_nand_rb: nand-rb-0 {
>> + atmel,pins =
>> + <AT91_PIOD 5 AT91_PERIPH_GPIO AT91_PINCTRL_PULL_UP>;
>> + };
>> +
>> + pinctrl_nand_cs: nand-cs-0 {
>> + atmel,pins =
>> + <AT91_PIOD 4 AT91_PERIPH_GPIO AT91_PINCTRL_PULL_UP>;
>> + };
>> + };
>> +
>> + ebi {
>> + pinctrl_ebi_data_0_7: ebi-data-lsb-0 {
>> + atmel,pins =
>> + <AT91_PIOD 6 AT91_PERIPH_A (AT91_PINCTRL_NONE | AT91_PINCTRL_SLEWRATE_DIS)
>> + AT91_PIOD 7 AT91_PERIPH_A (AT91_PINCTRL_NONE | AT91_PINCTRL_SLEWRATE_DIS)
>> + AT91_PIOD 8 AT91_PERIPH_A (AT91_PINCTRL_NONE | AT91_PINCTRL_SLEWRATE_DIS)
>> + AT91_PIOD 9 AT91_PERIPH_A (AT91_PINCTRL_NONE | AT91_PINCTRL_SLEWRATE_DIS)
>> + AT91_PIOD 10 AT91_PERIPH_A (AT91_PINCTRL_NONE | AT91_PINCTRL_SLEWRATE_DIS)
>> + AT91_PIOD 11 AT91_PERIPH_A (AT91_PINCTRL_NONE | AT91_PINCTRL_SLEWRATE_DIS)
>> + AT91_PIOD 12 AT91_PERIPH_A (AT91_PINCTRL_NONE | AT91_PINCTRL_SLEWRATE_DIS)
>> + AT91_PIOD 13 AT91_PERIPH_A (AT91_PINCTRL_NONE | AT91_PINCTRL_SLEWRATE_DIS)>;
>> + };
>> +
>> + pinctrl_ebi_addr_nand: ebi-addr-0 {
>> + atmel,pins =
>> + <AT91_PIOD 2 AT91_PERIPH_A (AT91_PINCTRL_NONE | AT91_PINCTRL_SLEWRATE_DIS)
>> + AT91_PIOD 3 AT91_PERIPH_A (AT91_PINCTRL_NONE | AT91_PINCTRL_SLEWRATE_DIS)>;
>> + };
>> + };
>> +
>
> Please remove the ebi and nand block so you have one tab less. Then I
> suggest to align to linux dts and refer to pinctrl instead to create
> another level of indentation
Hello Michael,
In Linux I see the nand and ebi block. We have to keep the same DT as in
Linux. Do you agree ?
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/arm/boot/dts/at91-sam9x60ek.dts#n378
Eugen
>
>> pinctrl_qspi: qspi {
>> atmel,pins =
>> <AT91_PIOB 19 AT91_PERIPH_A AT91_PINCTRL_NONE
> This part can be tab back
>
> Michael
>
>> @@ -106,6 +144,71 @@
>> };
>> };
>>
>> +&ebi {
>> + pinctrl-names = "default";
>> + pinctrl-0 = <&pinctrl_ebi_addr_nand &pinctrl_ebi_data_0_7>;
>> + status = "okay";
>> +
>> + nand_controller: nand-controller {
>> + pinctrl-names = "default";
>> + pinctrl-0 = <&pinctrl_nand_oe_we &pinctrl_nand_cs &pinctrl_nand_rb>;
>> + status = "okay";
>> +
>> + nand at 3 {
>> + reg = <0x3 0x0 0x800000>;
>> + rb-gpios = <&pioD 5 GPIO_ACTIVE_HIGH>;
>> + cs-gpios = <&pioD 4 GPIO_ACTIVE_HIGH>;
>> + nand-bus-width = <8>;
>> + nand-ecc-mode = "hw";
>> + nand-ecc-strength = <8>;
>> + nand-ecc-step-size = <512>;
>> + nand-on-flash-bbt;
>> + label = "atmel_nand";
>> +
>> + partitions {
>> + compatible = "fixed-partitions";
>> + #address-cells = <1>;
>> + #size-cells = <1>;
>> +
>> + at91bootstrap at 0 {
>> + label = "at91bootstrap";
>> + reg = <0x0 0x40000>;
>> + };
>> +
>> + uboot at 40000 {
>> + label = "u-boot";
>> + reg = <0x40000 0xc0000>;
>> + };
>> +
>> + ubootenvred at 100000 {
>> + label = "U-Boot Env Redundant";
>> + reg = <0x100000 0x40000>;
>> + };
>> +
>> + ubootenv at 140000 {
>> + label = "U-Boot Env";
>> + reg = <0x140000 0x40000>;
>> + };
>> +
>> + dtb at 180000 {
>> + label = "device tree";
>> + reg = <0x180000 0x80000>;
>> + };
>> +
>> + kernel at 200000 {
>> + label = "kernel";
>> + reg = <0x200000 0x600000>;
>> + };
>> +
>> + rootfs at 800000 {
>> + label = "rootfs";
>> + reg = <0x800000 0x1f800000>;
>> + };
>> + };
>> + };
>> + };
>> +};
>> +
>> &macb0 {
>> phy-mode = "rmii";
>> status = "okay";
>> --
>> 2.34.1
>>
>
>
> --
> Michael Nazzareno Trimarchi
> Co-Founder & Chief Executive Officer
> M. +39 347 913 2170
> michael at amarulasolutions.com
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