Antwort: Re: Re: Re: nor flash board init code

[christian.buettner at rafi.de]

Ok i see.. :)
thanks a lot.



Von:    Franck Jullien <franck.jullien at gmail.com>
An:     christian.buettner at rafi.de, 
Kopie:  barebox at lists.infradead.org
Datum:  30.07.2012 10:33
Betreff:        Re: Re: Re: nor flash board init code



2012/7/30  <christian.buettner at rafi.de>:
> 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?
>

It used to work. You need to find why it doesn't work anymore ;)

> christian
>
>
> Von:        Franck Jullien <franck.jullien at gmail.com>
> An:        christian.buettner at rafi.de,
> Kopie:        barebox at lists.infradead.org
> Datum:        30.07.2012 10:07
> Betreff:        Re: Re: nor flash board init code
> ________________________________
>
>
>
> Hi,
>
> 2012/7/30 <christian.buettner at 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 at gmail.com>
>> An:        christian.buettner at rafi.de,
>> Kopie:        barebox at lists.infradead.org
>> Datum:        27.07.2012 13:33
>> Betreff:        Re: nor flash board init code
>> ________________________________
>>
>>
>>
>> 2012/7/25 <christian.buettner at 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 at 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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