SPI User Interface on MPC8313eRDB board

hoyoung — Mon, 23 Mar 2009 08:33:07 GMT

Hello.

In advanced, I appreciated you reading this message.

I have mpc8313 SOC custom board and I developing linux device driver for spi controller.

As you know I referenced MPC8313erdb BSP Kernel 2.6.20 that dosen't support user-level

device driver for spi controller on mpc8313 SOCs.

I need some advice for developing SPI devcie driver using mpc83xx_spi platform_driver

finally for use user-level driver.

So. I found some patch for BSP kernel source spidev.c. And I patch that code to BSP kernel 2.6.20

Kconfig file, include header directory,Makefiel, and so on...

But I failed to use spid controller in user-level(open, read, write) . I tested that device driver "spidev"

using test code that is writtened in /linux/Documents/spi/spi_dev that fiile's name is spidev_test.c

Please give a little advice for my problem.

It will be helps for developing user-level device driver using mpc83xx_spi platform driver that any you

comment.

Regards newbei

Re: SPI User Interface on MPC8313eRDB board

big_snauzer — Sat, 19 Dec 2009 02:43:52 GMT

Hi to everyone,

I have a similar problem, even from my side is not clear how to pass platform_data to spi controller.

I have to interface an ST M25p16 to a MPC8313E cpu.
I am working on a demoboard MPC8313E-RDB REVA2, with the ltib-mpc8313erdb-20081222

~ # uname -a
Linux mpc8313erdb 2.6.23 #12 Tue Dec 15 14:21:22 CET 2009 ppc unknown

I have activated into the kernel configuration the following items:

----Memory Technology Device (MTD) support
   <*>   MTD concatenating support
   [*]   MTD partitioning support
   [*]    Command line partition table parsing
   <*>   Direct char device access to MTD devices
   <*>   Caching block device access to MTD devices

---- SPI support
   [*] SPI support
   <*> Freescale MPC83xx SPI controller
   <*> SPI EEPROMs from most vendors

- The /dev directory doesn't show any device referring to the memory.
- The SPI signals except of one dummy byte during the startup phase are stucked into the idle state.
- I am using the m25p80.c file

Anyone have some idea?

Regards

big_snauzer

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SPI User Interface on MPC8313eRDB board

Re: SPI User Interface on MPC8313eRDB board