-------- Original Message --------
> Subject: [PATCH] Simple driver for Xilinx SPI controler.
> Date: Wed, 06 Jun 2007 18:05:59 +0400
> From: Andrei Konovalov <[EMAIL PROTECTED]>
> To: [EMAIL PROTECTED]
> CC: [email protected]
<snip>
> The patch to enable SPI for Xilinx ML300 board (EDK reference design)
> will be sent to linuxppc-embedded list shortly.
Here it goes.
EDK 8.2 doesn't create a "Canonical Constant Name" for the
number of slave selects, so the definition of XPAR_SPI_0_NUM_SS_BITS
has been added to xparameters_ml300.h by hand.
Thanks,
Andrei
Signed-off-by: Andrei Konovalov <[EMAIL PROTECTED]>
---
arch/ppc/platforms/4xx/xilinx_ml300.c | 31 +++++++++++++++++++++++++
arch/ppc/syslib/virtex_devices.c | 40 +++++++++++++++++++++++++++++++++
2 files changed, 71 insertions(+), 0 deletions(-)
diff --git a/arch/ppc/platforms/4xx/xilinx_ml300.c
b/arch/ppc/platforms/4xx/xilinx_ml300.c
index 623aa92..e065c1b 100644
--- a/arch/ppc/platforms/4xx/xilinx_ml300.c
+++ b/arch/ppc/platforms/4xx/xilinx_ml300.c
@@ -16,6 +16,8 @@
#include <linux/serial_core.h>
#include <linux/serial_8250.h>
#include <linux/serialP.h>
+#include <linux/spi/spi.h>
+#include <linux/spi/eeprom.h>
#include <asm/io.h>
#include <asm/machdep.h>
@@ -122,6 +124,27 @@ static struct xilinxfb_platform_data xilinxfb_ml300_pdata
= {
.screen_width_mm = 132,
};
+#ifdef CONFIG_SPI_XILINX
+
+static struct spi_eeprom ml300_eeprom = {
+ .byte_len = 2048,
+ .name = "25LC160",
+ .page_size = 16,
+ .flags = EE_ADDR2,
+};
+
+static struct spi_board_info ml300_spi_board_info[] = {
+ {
+ .modalias = "at25",
+ .platform_data = &ml300_eeprom,
+ .max_speed_hz = 2 * 1000 * 1000,
+ .bus_num = 0,
+ .chip_select = 0,
+ },
+};
+
+#endif /* CONFIG_SPI_XILINX */
+
int __init virtex_device_fixup(struct platform_device *dev)
{
if (strcmp(dev->name, "xilinxfb") == 0) {
@@ -130,6 +153,14 @@ int __init virtex_device_fixup(struct platform_device *dev)
dev->dev.platform_data = &xilinxfb_ml300_pdata;
return 0;
}
+#ifdef CONFIG_SPI_XILINX
+ if (strcmp(dev->name, "xspi") == 0) {
+ if (dev->id != 0) /* paranoic */
+ return 1;
+ spi_register_board_info(ml300_spi_board_info,
+ ARRAY_SIZE(ml300_spi_board_info));
+ }
return 0;
+#endif /* CONFIG_SPI_XILINX */
}
diff --git a/arch/ppc/syslib/virtex_devices.c b/arch/ppc/syslib/virtex_devices.c
index 56cbdd6..4a2d106 100644
--- a/arch/ppc/syslib/virtex_devices.c
+++ b/arch/ppc/syslib/virtex_devices.c
@@ -161,6 +161,41 @@ DEFINE_XPAR_TEMAC_PDATA(1);
}, \
}
+/*
+ * SPI platform data
+ */
+#define DEFINE_XPAR_SPI_PDATA(num) \
+static struct xspi_platform_data xspi_##num##_pdata = { \
+ .bus_num = XPAR_SPI_##num##_DEVICE_ID, \
+ .num_chipselect = XPAR_SPI_##num##_NUM_SS_BITS, \
+}
+
+#ifdef XPAR_SPI_0_BASEADDR
+DEFINE_XPAR_SPI_PDATA(0);
+#endif /* XPAR_SPI_0_BASEADDR */
+
+/*
+ * SPI: shortcut macro for single instance
+ */
+#define XPAR_SPI(num) { \
+ .name = "xspi", \
+ .id = XPAR_SPI_##num##_DEVICE_ID, \
+ .dev.platform_data = &xspi_##num##_pdata, \
+ .num_resources = 2, \
+ .resource = (struct resource[]) { \
+ { \
+ .start = XPAR_SPI_##num##_BASEADDR, \
+ .end = XPAR_SPI_##num##_HIGHADDR, \
+ .flags = IORESOURCE_MEM, \
+ }, \
+ { \
+ .start = XPAR_INTC_0_SPI_##num##_VEC_ID, \
+ .end = XPAR_INTC_0_SPI_##num##_VEC_ID, \
+ .flags = IORESOURCE_IRQ, \
+ }, \
+ }, \
+}
+
struct platform_device virtex_platform_devices[] = {
/* UARTLITE instances */
#if defined(XPAR_UARTLITE_0_BASEADDR)
@@ -220,6 +255,11 @@ struct platform_device virtex_platform_devices[] = {
#ifdef XPAR_TEMAC_1_BASEADDR
XPAR_TEMAC(1),
#endif
+
+ /* SPI instances */
+#ifdef XPAR_SPI_0_BASEADDR
+ XPAR_SPI(0),
+#endif /* XPAR_SPI_0_BASEADDR */
};
/* Early serial support functions */
--
1.5.1.1
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