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sh: add spi header and r2d platform data V3

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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: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Magnus Damm 2008-01-23 16:21:18 +09:00 committed by Paul Mundt
parent da2d7f4bc5
commit 6582d7b737
2 changed files with 55 additions and 0 deletions
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42
arch/sh/boards/renesas/rts7751r2d/setup.c
View file

@ -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));
}

13
include/asm-sh/spi.h Normal file
View file

@ -0,0 +1,13 @@
#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__ */