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Commit 6582d7b7 authored by Magnus Damm's avatar Magnus Damm Committed by Paul Mundt
Browse files

sh: add spi header and r2d platform data V3 



This patch adds the header file asm/spi.h and board specific code for the
r2d board. The header file contains a structure that should be used to
point out a single spi bus. The board specific code for r2d is updated with
such a structure for the new spi_sh_sci driver. The structure contains a
chip select callback plus information about the R9701 rtc chip which is
attached to the spi bus.

Signed-off-by: default avatarMagnus Damm <damm@igel.co.jp>
Signed-off-by: default avatarPaul Mundt <lethal@linux-sh.org>
parent da2d7f4b

arch/sh/boards/renesas/rts7751r2d/setup.c

+42 −0
Original line number Diff line number Diff line
@@ -16,9 +16,12 @@ 
#include <linux/sm501-regs.h>

#include <linux/pm.h>

#include <linux/fb.h>

#include <linux/spi/spi.h>

#include <linux/spi/spi_bitbang.h>

#include <asm/machvec.h>

#include <asm/rts7751r2d.h>

#include <asm/io.h>

#include <asm/spi.h>



static struct resource cf_ide_resources[] = {

	[0] = {
@@ -53,6 +56,43 @@ static struct platform_device cf_ide_device = { 
	},

};



static struct spi_board_info spi_bus[] = {

	{

		.modalias	= "rtc-r9701",

		.max_speed_hz	= 1000000,

		.mode		= SPI_MODE_3,

	},

};



static void r2d_chip_select(struct sh_spi_info *spi, int cs, int state)

{

	BUG_ON(cs != 0);  /* Single Epson RTC-9701JE attached on CS0 */

	ctrl_outw(state == BITBANG_CS_ACTIVE, PA_RTCCE);

}



static struct sh_spi_info spi_info = {

	.num_chipselect = 1,

	.chip_select = r2d_chip_select,

};



static struct resource spi_sh_sci_resources[] = {

	{

		.start	= 0xffe00000,

		.end	= 0xffe0001f,

		.flags	= IORESOURCE_MEM,

	},

};



static struct platform_device spi_sh_sci_device  = {

	.name		= "spi_sh_sci",

	.id		= -1,

	.num_resources	= ARRAY_SIZE(spi_sh_sci_resources),

	.resource	= spi_sh_sci_resources,

	.dev	= {

		.platform_data	= &spi_info,

	},

};



static struct resource heartbeat_resources[] = {

	[0] = {

		.start	= PA_OUTPORT,
@@ -176,10 +216,12 @@ static struct platform_device *rts7751r2d_devices[] __initdata = { 
#endif

	&cf_ide_device,

	&heartbeat_device,

	&spi_sh_sci_device,

};



static int __init rts7751r2d_devices_setup(void)

{

	spi_register_board_info(spi_bus, ARRAY_SIZE(spi_bus));

	return platform_add_devices(rts7751r2d_devices,

				    ARRAY_SIZE(rts7751r2d_devices));

}

include/asm-sh/spi.h

0 → 100644
+13 −0
Original line number Diff line number Diff line 
#ifndef __ASM_SPI_H__

#define __ASM_SPI_H__



struct sh_spi_info;



struct sh_spi_info {

	int			 bus_num;

	int			 num_chipselect;



	void (*chip_select)(struct sh_spi_info *spi, int cs, int state);

};



#endif /* __ASM_SPI_H__ */