Antwort: Re: Re: nor flash board init code
christian.buettner at rafi.de
christian.buettner at rafi.de
Mon Jul 30 04:15:45 EDT 2012
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 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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