[PATCH 5/6] ARM: dts: Add nodes for spi controllers for Samsung Exynos4 platforms

[Thomas Abraham]

On 24 May 2012 13:13, Kukjin Kim <kgene.kim at samsung.com> wrote:
> Thomas Abraham wrote:
>>
>> Add device nodes for the three instances of spi controllers in Exynos4
>> platforms. Enable instance spi 2 for smdkv310 board and disable all
>> spi instances for origen board.
>>
>> Signed-off-by: Thomas Abraham <thomas.abraham at linaro.org>
>> ---
>>  arch/arm/boot/dts/exynos4210-origen.dts   |   12 ++++++++
>>  arch/arm/boot/dts/exynos4210-smdkv310.dts |   44
>> +++++++++++++++++++++++++++++
>>  arch/arm/boot/dts/exynos4210.dtsi         |   30 +++++++++++++++++++
>>  3 files changed, 86 insertions(+), 0 deletions(-)
>
> [...]
>
>> +     aliases {
>> +             spi0 = &spi_0;
>> +             spi1 = &spi_1;
>> +             spi2 = &spi_2;
>> +     };
>> +
>
> Do we need above aliases?

spi0 controller has different fifo sizes than spi1 and spi2. So we
need aliases to identify the port number and know the fifo sizes.

>
> [...]
>
>>
>> +     spi_2: spi at 13940000 {
>> +             gpios = <&gpc1 1 5 3 0>,
>> +                     <&gpc1 3 5 3 0>,
>> +                     <&gpc1 4 5 3 0>;
>> +
>> +             w25x80 at 0 {
>> +                     #address-cells = <1>;
>> +                     #size-cells = <1>;
>> +                     compatible = "w25x80";
>> +                     reg = <0>;
>> +                     spi-max-frequency = <10000>;
>> +
>> +                     controller-data {
>> +                             cs-gpio = <&gpc1 2 1 0 3>;
>> +                             samsung,spi-feedback-delay = <0>;
>> +                     };
>> +
>> +                     partition at 0 {
>> +                             label = "U-Boot";
>> +                             reg = <0x0 0x40000>;
>> +                             read-only;
>> +                     };
>> +
>> +                     partition at 40000 {
>> +                             label = "Kernel";
>> +                             reg = <0x40000 0xc0000>;
>> +                     };
>> +             };
>> +     };
>> +
>
>
> Is there a serial flash(w25x80) is connected via SPI2 on smdkv310?

Yes, smdkv310 has a onboard spi flash connected to SPI2 (w25x80).

Thanks,
Thomas.

>
> [...]
>
> Thanks.
>
> Best regards,
> Kgene.
> --
> Kukjin Kim <kgene.kim at samsung.com>, Senior Engineer,
> SW Solution Development Team, Samsung Electronics Co., Ltd.
>