On Thu, 23 Jan 2014 09:03:28 -0800 (PST), vinicius...@gmail.com
<vinicius...@gmail.com> wrote:
> Em quinta-feira, 23 de janeiro de 2014 13h59min19s UTC-3, vinic...@gmail.com
> escreveu:
> > Em terça-feira, 21 de janeiro de 2014 08h44min19s UTC-3, Tomas Novotny
> > escreveu:
> >
> > > Hi All,
> >
> > >
> >
> > >
> >
> > >
> >
> > > I'm trying to use some SPI devices on A10s OLinuXino. It was flawless for
> >
> > >
> >
> > > simple MCU driven by spidev (everything needed is defined in FEX). Now I'm
> >
> > >
> >
> > > trying to connect external CAN over SPI (MCP2515).
> >
> > >
> >
> > > The mcp251x driver needs to pass oscillator frequency through the
> >
> > >
> >
> > > mcp251x_platform_data structure. Is there any clean way how to do it on
> > > 3.4
> >
> > >
> >
> > > linux-sunxi? It seems that platform data for SPI board aren't passed by
> > > sunxi
> >
> > >
> >
> > > SPI driver.
> >
> > >
> >
> > > I'm using Debian image with custom built 3.4.61 linux-sunxi.
> >
> > >
> >
> > > Thanks to all,
> >
> > >
> >
> > >
> >
> > >
> >
> > > Tomas
> >
> >
> >
> > You can change by yourself spi_sunxi.c, something like that:
> >
> >
> >
> > diff --git a/drivers/spi/spi_sunxi.c b/drivers/spi/spi_sunxi.c
> >
> > index a3792fd..2f0ab7c 100644
> >
> > --- a/drivers/spi/spi_sunxi.c
> >
> > +++ b/drivers/spi/spi_sunxi.c
> >
> > @@ -28,6 +28,7 @@
> >
> >
> >
> > #include <linux/spi/spi.h>
> >
> > #include <linux/spi/spi_bitbang.h>
> >
> > +#include <linux/can/platform/mcp251x.h>
> >
> >
> >
> > #include <asm/io.h>
> >
> > #include <plat/dma.h>
> >
> > @@ -134,6 +135,10 @@ struct sunxi_spi {
> >
> > int cs_bitmap;/* cs0- 0x1; cs1-0x2, cs0&cs1-0x3. */
> >
> > };
> >
> >
> >
> > +static struct mcp251x_platform_data mcp251x_info = {
> >
> > + .oscillator_frequency = 8000000,
> >
> > +};
> >
> > +
>
> Sorry, something like that:
>
> diff --git a/drivers/spi/spi_sunxi.c b/drivers/spi/spi_sunxi.c
> index a3792fd..2f0ab7c 100644
> --- a/drivers/spi/spi_sunxi.c
> +++ b/drivers/spi/spi_sunxi.c
> @@ -28,6 +28,7 @@
>
> #include <linux/spi/spi.h>
> #include <linux/spi/spi_bitbang.h>
> +#include <linux/can/platform/mcp251x.h>
>
> #include <asm/io.h>
> #include <plat/dma.h>
> @@ -134,6 +135,10 @@ struct sunxi_spi {
> int cs_bitmap;/* cs0- 0x1; cs1-0x2, cs0&cs1-0x3. */
> };
>
> +static struct mcp251x_platform_data mcp251x_info = {
> + .oscillator_frequency = 8000000,
> +};
> +
> /* config chip select */
> s32 aw_spi_set_cs(u32 chipselect, void *base_addr)
> {
> @@ -1922,6 +1927,7 @@ int __devinit spi_sunxi_register_spidev(void)
> {
> board = &spi_boards[i];
> sprintf(spi_board_name, "spi_board%d", i);
> + board->platform_data = &mcp251x_info;
> ret = script_parser_fetch(spi_board_name, "modalias",
> (void*)board->modalias, sizeof(char*));
> if(ret != SCRIPT_PARSER_OK) {
> spi_msg("Get spi devices modalias failed\n");
>
Hi,
yes, I know that there are these "dirty" ways how to do it. In fact I was
thinking about similar way as a last option. I will probably hardcode
oscillator frequency directly to the mcp251x driver if there is no clean way
how to pass platform data through FEX.
Thanks for your answer,
Tomas
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