From mboxrd@z Thu Jan 1 00:00:00 1970 From: "=?UTF-8?B?6rCV7IOB7Jqw?=" Subject: =?utf-8?q?I_can=27t_see_the_SPI_device_file_i?= =?utf-8?q?n_/dev=2E?= Date: Wed, 08 Aug 2007 09:06:04 +0900 Message-ID: <1186531569955843.2.mail02@mail02> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============0697299972==" To: spi-devel-general-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Return-path: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: spi-devel-general-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Errors-To: spi-devel-general-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: linux-spi.vger.kernel.org --===============0697299972== Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable

Hi~ =
My developing Environment is below.

Kernel-2.6.22
     tar jxvf linux-2.6.22.1.tar= .bz2
     cd linux-2.6.22.1
   &= nbsp; zcat ../2.6.22-rc1-at91.patch.gz | patch -p1 > patchresult.txtCPU-AT91SAM9260

Through the web searching and kernel documentation, I know that use th= e spidev kernel module.
And I modify arch/at-91/board_sam9260.c file = as like below

 

static struct spi_board_info ek_spi_devices[] =3D {
{ //spi1.0-slo= t1
   .modalias =3D "spidev",
   .chip_select= =3D 0,
   .max_speed_hz =3D 15*1000*1000,
  = .bus_num=3D1,
},
{ //spi1.1-slot2
   .modalias =3D= "spidev",
   .chip_select =3D 1,
   .max_spe= ed_hz =3D 15*1000*1000,
   .bus_num=3D1,
},
 &= nbsp;  ~
}

 

After compiling the kernel, download kernel img to the target.
Ker= nel menu_config.

 

Device Drivers
 SPI support
    [*]SPI suppo= rt
        [*]Debug support for SPI= drivers
     SPI Master Controller Drivers
&nb= sp;    [*]Atmel SPI controller
    = [ ]Bitbanging SPI master
     SPI Protocol Master= s
     [ ]SPI EEPROMs from most vendors
 &= nbsp;   [*]User mode SPI device driver support

 

I execute the "/sbin/mdev -s" command into the target shell as expecti= ng the /dev/spidev.
But I can't see the device file for SPI in target= /dev folder. And I examin my /sys folder at target.
Of course, I can= find the spi device nodes created from modified board_sam9260.c.
Hum= ...I don't know why did not populate the SPI device file in /dev file?

 

#dmesg | grep spi
atmel_spi atmel_spi.1: Atmel SPI Controller at 0x= fffcc000 (irq 13)
atmel_spi atmel_spi.1: registered master spi1
s= pi spi1.0: setup: 14189714 Hz bpw 8 mode 0x0 -> csr0 0a0a0702
atme= l_spi atmel_spi.1: registered child spi1.0
spi spi1.1: setup: 1418971= 4 Hz bpw 8 mode 0x0 -> csr1 0a0a0702
atmel_spi atmel_spi.1: regist= ered child spi1.1
spi spi1.2: setup: 14189714 Hz bpw 8 mode 0x0 ->= csr2 0a0a0702
atmel_spi atmel_spi.1: registered child spi1.2
spi= spi1.3: setup: 14189714 Hz bpw 8 mode 0x0 -> csr3 0a0a0702
atmel_= spi atmel_spi.1: registered child spi1.3

 

Does root file system (NFS) has the problem ? or Kernel menu configura= tion ?
Could you teach check point for this problem?

 

This project name - Access control Unit
The system is configured tw= o kind of board.
Main b'd has the AT91SAM9260 which has the Linux OS.<= BR>Sub b'd has the Atmega2560 which is developing the AVR32 studio.
On= e Main b'd is connected 5 Sub b'd by SPI
Sub b'd is connected door loc= k by wiegend.
Main b'd is connected ACU server by TCP/IP.

 

And SPI Interface is very important!. Other communication interface is= done.

Please Help me~. I had reported this problems to atmel and at91 but I = did not receive any reply~




<= /a>

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