On Thu, 23 Jan 2014 19:11:32 +0100, Gustavo Zamboni <gustavozamb...@gmail.com> wrote:
Hi Gustavo, > Why dont you just add the device to the fex file ?? > > activate your spix_para parameters > > and add something like: > > > |[spi_devices]| > spi_dev_num=1 > > |[spi_board0]| > |modalias| |= ||"|mcp251x|"||| > |max_speed_hz| |= ||12000000| > |bus_num| |= ||1| > |chip_select| |= ||0| > |mode| |= ||3| > |full_duplex| |= ||0| > |manual_cs| |= ||0| > > > With spidev it works well with modalias "spidev". yes, this is exactly what I did. I was trying both spidev and mcp251x. There is no problem with spidev (it is currently working) but for mcp251x I need to pass (very simple) platform data with oscillator frequency. The mcp251x is being initialized during boot but it fails because of missing platform data. I don't know if there is some "clean" way how to pass platform data of the mcp251x driver. I think that FEX is not able to do that (there is no handling in sunxi spi). Thanks for you answer, Tomas > Gustavo Zamboni > > > > > Le 23/01/2014 18:03, vinicius...@gmail.com a écrit : > > 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"); > > > -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to linux-sunxi+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.