[patch 8/9] efikamx: add spi nor support

[Arnaud Patard (Rtp)]

Matt Sealey <matt at genesi-usa.com> writes:

> On Wed, Oct 20, 2010 at 6:26 AM, Amit Kucheria <amit.kucheria at linaro.org> wrote:
>> On 10 Oct 19, Arnaud Patard wrote:
>>> On efikamx, uboot is stored on a nor spi flash. Add support for it
>>>
>>> Signed-off-by: Arnaud Patard <arnaud.patard at rtp-net.org>
>>> Index: linux-2.6/arch/arm/mach-mx5/board-mx51_efikamx.c
>>> ===================================================================
>>> --- linux-2.6.orig/arch/arm/mach-mx5/board-mx51_efikamx.c     2010-10-16 14:21:24.000000000 +0200
>>> +++ linux-2.6/arch/arm/mach-mx5/board-mx51_efikamx.c  2010-10-16 15:34:12.000000000 +0200
>>> @@ -24,6 +24,8 @@
>>>  #include <linux/delay.h>
>>>  #include <linux/io.h>
>>>  #include <linux/fsl_devices.h>
>>> +#include <linux/spi/flash.h>
>>> +#include <linux/spi/spi.h>
>>>
>>>  #include <mach/common.h>
>>>  #include <mach/hardware.h>
>>> @@ -52,6 +54,9 @@
>>>
>>>  #define EFIKAMX_POWER_KEY    (1*32+31)
>>>
>>> +#define EFIKAMX_SPI_CS0              (3*32+24)
>>> +#define EFIKAMX_SPI_CS1              (3*32+25)
>>
>> It is just a style thing, but could you make this (3*32 + 24). Makes it
>> easier on the eyes to read "4th gpio bank, 24th pin"
>
> Better yet:
>
> #define GPIO_BANK(n) ((n-1)*32)
> ..
> #define EFIKAMX_SPI_CS0 (GPIO_BANK(4) + 24).
>
> It'll get compiled to a constant and is more readable, right? :D

you can even imagine something like
#define MX51_GPIO(x,y)         ((x-1) + y)

Anyway, imho it should be a different patch because if we're going this
way all imx51 machines files would deserve the same change.

>
>>>  /* the pci ids pin have pull up. they're driven low according to board id */
>>>  #define MX51_PAD_PCBID0      IOMUX_PAD(0x518, 0x130, 3, 0x0,   0, PAD_CTL_PUS_100K_UP)
>>>  #define MX51_PAD_PCBID1      IOMUX_PAD(0x51C, 0x134, 3, 0x0,   0, PAD_CTL_PUS_100K_UP)
>>> @@ -99,6 +104,14 @@
>>>
>>>       /* power key */
>>>       MX51_PAD_PWRKEY,
>>> +
>>> +     /* spi */
>>> +     MX51_PAD_CSPI1_MOSI__ECSPI1_MOSI,
>>> +     MX51_PAD_CSPI1_MISO__ECSPI1_MISO,
>>> +     MX51_PAD_CSPI1_SS0__GPIO_4_24,
>>> +     MX51_PAD_CSPI1_SS1__GPIO_4_25,
>>> +     MX51_PAD_CSPI1_RDY__ECSPI1_RDY,
>>> +     MX51_PAD_CSPI1_SCLK__ECSPI1_SCLK,
>>>  };
>>>
>>>  /* Serial ports */
>>> @@ -252,6 +265,47 @@
>>>       },
>>>  };
>>>
>>> +static struct mtd_partition mx51_efikamx_spi_nor_partitions[] = {
>>> +     {
>>> +      .name = "u-boot",
>>
>> "bootloader" ?
>
> "firmware" :)

please, reach an agreement with Amit. I don't want to be blocked by such
a thing :)

Arnaud