Antwort: Re: Re: nor flash board init code

[christian.buettner@rafi.de]

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Whooosch and it worked!

devinfo 
devices:
...
`---- mem1
     `---- 0x00000000-0xfffffffe: /dev/mem
`---- i2c-imx2
`---- imx_spi0
     `---- m25p0
`---- fec_imx0
     `---- miidev0
...

barebox:/ devinfo m25p0
resources:
driver: none

no parameters available
barebox:/ 

But why is driver in devinfo = none?

christian


Von:    Franck Jullien <franck.jullien@gmail.com>
An:     christian.buettner@rafi.de, 
Kopie:  barebox@lists.infradead.org
Datum:  30.07.2012 10:07
Betreff:        Re: Re: nor flash board init code



Hi,

2012/7/30 <christian.buettner@rafi.de>
>
> Thanks for the code!
>
> Here is my approach:
>
> const struct flash_platform_data tx53_flash = {
>     .type       = "mx25l8005",
>     .name       = "spi_flash",
> };
>
>
> //MX25L8005MC-15G
> static const struct spi_board_info mx53_spi_board_info[] = {
>         {
>                 .name = "mx25l8005",


Here sould be the driver name: .name = "m25p",

>
>                 .max_speed_hz = 70000000,
>                 .bus_num = 0,
>                 .chip_select = 0,
>                 .bits_per_word = 8,
>                 .mode = SPI_MODE_0,
>                 .platform_data = &tx53_flash,
>         },
> };
>
> static struct spi_imx_master tx53_spi = {
>                 .num_chipselect = 1,
> };
>
>
> init_devices {
>
> ...
>     spi_register_board_info(mx53_spi_board_info,
>                     ARRAY_SIZE(mx53_spi_board_info));
>
>     add_generic_device("m25p",-1,"m25p",MX53_ECSPI1_BASE_ADDR,64 * 
1024,IORESOURCE_MEM,&mx53_spi_board_info);

You have to add the SPI master device here. The m25p device will be
probed automagically (AFAIR).


>
> ...
> }
>
>
> When the m25p80.c driver probes i get no spi instance:
>
> static int m25p_probe(struct device_d *dev) {
>         struct spi_device *spi = (struct spi_device *)dev->type_data;
>         const struct spi_device_id        *id = NULL;
> ...
> }
>
> struct spi_device *spi is always null
>
> Whats wrong here?
>
> christian
>
>
>
> Von:        Franck Jullien <franck.jullien@gmail.com>
> An:        christian.buettner@rafi.de,
> Kopie:        barebox@lists.infradead.org
> Datum:        27.07.2012 13:33
> Betreff:        Re: nor flash board init code
> ________________________________
>
>
>
> 2012/7/25 <christian.buettner@rafi.de>
> >
> > hi all,
> > is there any example board init code to load the mx25l8005 spi 
nor-flash through the imx53 (TX53 from KARO)?
> > I want to use the m25p80 driver to read and write.
> >
> > christian
> > _______________________________________________
> > barebox mailing list
> > barebox@lists.infradead.org
> > http://lists.infradead.org/mailman/listinfo/barebox
> >
>
> Hi Christian,
>
> This is what I use with the Altera SPI controller + an SPI flash device:
>
> 
http://www.elec4fun.fr/index.php?option=com_content&view=article&id=10&Itemid=153

>
> static struct spi_altera_master altera_spi_0_data = {
>      .num_chipselect = 1,
>      .spi_mode = 0,      /* SPI mode of the EPCS flash controller */
>      .databits = 8,      /* Data length of the EPCS flash controller */
>      .speed = 20000000,  /* EPCS flash controller speed */
> };
>
>
> static struct flash_platform_data epcs_flash = {
>      .name = "epcs",    /* Cdev name, optional */
>      .type = "m25p40",  /* Device type, required for non JEDEC chips */
> };
>
> static struct spi_board_info generic_spi_board_info[] = {
>      {
>            .name = "m25p",
>            .max_speed_hz = 20000000,
>            .bus_num = 0,
>            .chip_select = 0,
>            .bits_per_word = 8,
>            .mode = SPI_MODE_0,
>            .platform_data = &epcs_flash,
>      }
> };
>
> static int myboard_devices_init(void) {
>
> ...
>
> spi_register_board_info(myboard_spi_board_info,
> ARRAY_SIZE(myboard_spi_board_info));
>
> add_generic_device("altera_spi", -1, NULL, NIOS_SOPC_EPCS_BASE, 0x18,
>                    IORESOURCE_MEM, &altera_spi_0_data);
>
> ...
>
> Franck.
>

Franck.


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