mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-05 18:14:07 +08:00
c8b61d5089
Add support for Sysam stmark2 board, an open hardware embedded Linux board, see http://sysam.it/cff_stmark2.html for any info. Signed-off-by: Angelo Dureghello <angelo@sysam.it> Signed-off-by: Greg Ungerer <gerg@linux-m68k.org>
120 lines
2.7 KiB
C
120 lines
2.7 KiB
C
/*
|
|
* stmark2.c -- Support for Sysam AMCORE open board
|
|
*
|
|
* (C) Copyright 2017, Angelo Dureghello <angelo@sysam.it>
|
|
*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file COPYING in the main directory of this archive
|
|
* for more details.
|
|
*/
|
|
|
|
#include <linux/platform_device.h>
|
|
#include <linux/mtd/partitions.h>
|
|
#include <linux/spi/spi.h>
|
|
#include <linux/spi/spi-fsl-dspi.h>
|
|
#include <linux/spi/flash.h>
|
|
#include <asm/mcfsim.h>
|
|
|
|
/*
|
|
* Partitioning of parallel NOR flash (39VF3201B)
|
|
*/
|
|
static struct mtd_partition stmark2_partitions[] = {
|
|
{
|
|
.name = "U-Boot (1024K)",
|
|
.size = 0x100000,
|
|
.offset = 0x0
|
|
}, {
|
|
.name = "Kernel+initramfs (7168K)",
|
|
.size = 0x700000,
|
|
.offset = MTDPART_OFS_APPEND
|
|
}, {
|
|
.name = "Flash Free Space (8192K)",
|
|
.size = MTDPART_SIZ_FULL,
|
|
.offset = MTDPART_OFS_APPEND
|
|
}
|
|
};
|
|
|
|
static struct flash_platform_data stmark2_spi_flash_data = {
|
|
.name = "is25lp128",
|
|
.parts = stmark2_partitions,
|
|
.nr_parts = ARRAY_SIZE(stmark2_partitions),
|
|
.type = "is25lp128",
|
|
};
|
|
|
|
static struct spi_board_info stmark2_board_info[] __initdata = {
|
|
{
|
|
.modalias = "m25p80",
|
|
.max_speed_hz = 5000000,
|
|
.bus_num = 0,
|
|
.chip_select = 1,
|
|
.platform_data = &stmark2_spi_flash_data,
|
|
.mode = SPI_MODE_3,
|
|
}
|
|
};
|
|
|
|
/* SPI controller data, SPI (0) */
|
|
static struct fsl_dspi_platform_data dspi_spi0_info = {
|
|
.cs_num = 4,
|
|
.bus_num = 0,
|
|
.sck_cs_delay = 100,
|
|
.cs_sck_delay = 100,
|
|
};
|
|
|
|
static struct resource dspi_spi0_resource[] = {
|
|
[0] = {
|
|
.start = MCFDSPI_BASE0,
|
|
.end = MCFDSPI_BASE0 + 0xFF,
|
|
.flags = IORESOURCE_MEM,
|
|
},
|
|
[1] = {
|
|
.start = 12,
|
|
.end = 13,
|
|
.flags = IORESOURCE_DMA,
|
|
},
|
|
[2] = {
|
|
.start = MCF_IRQ_DSPI0,
|
|
.end = MCF_IRQ_DSPI0,
|
|
.flags = IORESOURCE_IRQ,
|
|
},
|
|
};
|
|
|
|
/* SPI controller, id = bus number */
|
|
static struct platform_device dspi_spi0_device = {
|
|
.name = "fsl-dspi",
|
|
.id = 0,
|
|
.num_resources = ARRAY_SIZE(dspi_spi0_resource),
|
|
.resource = dspi_spi0_resource,
|
|
.dev = {
|
|
.platform_data = &dspi_spi0_info,
|
|
},
|
|
};
|
|
|
|
static struct platform_device *stmark2_devices[] __initdata = {
|
|
&dspi_spi0_device,
|
|
};
|
|
|
|
/*
|
|
* Note: proper pin-mux setup is mandatory for proper SPI functionality.
|
|
*/
|
|
static int __init init_stmark2(void)
|
|
{
|
|
/* DSPI0, all pins as DSPI, and using CS1 */
|
|
__raw_writeb(0x80, MCFGPIO_PAR_DSPIOWL);
|
|
__raw_writeb(0xfc, MCFGPIO_PAR_DSPIOWH);
|
|
|
|
/* Board gpio setup */
|
|
__raw_writeb(0x00, MCFGPIO_PAR_BE);
|
|
__raw_writeb(0x00, MCFGPIO_PAR_FBCTL);
|
|
__raw_writeb(0x00, MCFGPIO_PAR_CS);
|
|
__raw_writeb(0x00, MCFGPIO_PAR_CANI2C);
|
|
|
|
platform_add_devices(stmark2_devices, ARRAY_SIZE(stmark2_devices));
|
|
|
|
spi_register_board_info(stmark2_board_info,
|
|
ARRAY_SIZE(stmark2_board_info));
|
|
|
|
return 0;
|
|
}
|
|
|
|
late_initcall(init_stmark2);
|