[PATCH] Enable SPI controller support for Xilinx ML300 board
From: Andrei Konovalov <hidden>
Date: 2007-06-06 14:04:50
Subsystem:
the rest · Maintainer:
Linus Torvalds
-------- Original Message --------
Subject: [PATCH] Simple driver for Xilinx SPI controler. Date: Wed, 06 Jun 2007 18:05:59 +0400 From: Andrei Konovalov <redacted> To: spi-devel-general@lists.sourceforge.net CC: linuxppc-embedded@ozlabs.org
<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 <redacted> --- 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 */
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