From 6582d7b7376aa587d74b08c74457dc28abc1a9fa Mon Sep 17 00:00:00 2001
From: Magnus Damm <magnus.damm@gmail.com>
Date: Wed, 23 Jan 2008 16:21:18 +0900
Subject: [PATCH] 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: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/boards/renesas/rts7751r2d/setup.c | 42 +++++++++++++++++++++++
include/asm-sh/spi.h | 13 +++++++
2 files changed, 55 insertions(+)
create mode 100644 include/asm-sh/spi.h
diff --git a/arch/sh/boards/renesas/rts7751r2d/setup.c b/arch/sh/boards/renesas/rts7751r2d/setup.c
index 8528616feaa0..3452b072adde 100644
--- a/arch/sh/boards/renesas/rts7751r2d/setup.c
+++ b/arch/sh/boards/renesas/rts7751r2d/setup.c
@@ -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));
}
diff --git a/include/asm-sh/spi.h b/include/asm-sh/spi.h
new file mode 100644
index 000000000000..e96f5b0953c8
--- /dev/null
+++ b/include/asm-sh/spi.h
@@ -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__ */
--
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