Re: problem with converting from at91_spi to atmel_spi (AT91RM9200)

[Ivan Kuten <ivan.kuten-NihHnkIkDZhBDgjK7y7TUQ@public.gmane.org>]

On Thu, 24 May 2007 12:20:22 -0500
Bill Gatliff wrote:

> Rev. F of the AT91RM9200 manual says, in 41.9.4:
> 
>     "If Mode fault is disabled, Chip Select 0 cannot be driven by a
>     component other than the SPI otherwise the transfer does not occur".
> 
> ... but if you enable mode faulting, something else breaks IIRC.
> 
> IOW, CS0 for the 9200 doesn't work if the SPI controls it.  And SPI 
> doesn't work for CS0 if the SPI controller _doesn't_ control it, 
> either.  So I've just quit using CS0.  :( 
> 

So I assume AT91RM9200 boards such as: 

static struct spi_board_info ek_spi_devices[] = {
        {       /* DataFlash chip */
                .modalias       = "mtd_dataflash",
                .chip_select    = 0,
                .max_speed_hz   = 15 * 1000 * 1000,
        },

static struct spi_board_info carmeva_spi_devices[] = {
        { /* DataFlash chip */
                .modalias = "mtd_dataflash",
                .chip_select  = 0,
                .max_speed_hz = 10 * 1000 * 1000,
        },

static struct spi_board_info dk_spi_devices[] = {
        {       /* DataFlash chip */
                .modalias       = "mtd_dataflash",
                .chip_select    = 0,
                .max_speed_hz   = 15 * 1000 * 1000,
        },

are broken cause all of them have chip_select = 0 ?

BR, Ivan


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