arch/arm/mach-lpc32xx/phy3250.c

Source file repositories/reference/linux-study-clean/arch/arm/mach-lpc32xx/phy3250.c

File Facts

System
Linux kernel
Corpus path
arch/arm/mach-lpc32xx/phy3250.c
Extension
.c
Size
2309 bytes
Lines
93
Domain
Architecture Layer
Bucket
arch/arm
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0+
/*
 * Platform support for LPC32xx SoC
 *
 * Author: Kevin Wells <kevin.wells@nxp.com>
 *
 * Copyright (C) 2012 Roland Stigge <stigge@antcom.de>
 * Copyright (C) 2010 NXP Semiconductors
 */

#include <linux/amba/pl08x.h>
#include <linux/mtd/lpc32xx_mlc.h>
#include <linux/mtd/lpc32xx_slc.h>
#include <linux/of_platform.h>

#include <asm/mach/arch.h>
#include "common.h"

static struct pl08x_channel_data pl08x_slave_channels[] = {
	{
		.bus_id = "nand-slc",
		.min_signal = 1, /* SLC NAND Flash */
		.max_signal = 1,
		.periph_buses = PL08X_AHB1,
	},
	{
		.bus_id = "nand-mlc",
		.min_signal = 12, /* MLC NAND Flash */
		.max_signal = 12,
		.periph_buses = PL08X_AHB1,
	},
};

static int pl08x_get_signal(const struct pl08x_channel_data *cd)
{
	return cd->min_signal;
}

static void pl08x_put_signal(const struct pl08x_channel_data *cd, int ch)
{
}

static struct pl08x_platform_data pl08x_pd = {
	/* Some reasonable memcpy defaults */
	.memcpy_burst_size = PL08X_BURST_SZ_256,
	.memcpy_bus_width = PL08X_BUS_WIDTH_32_BITS,
	.slave_channels = &pl08x_slave_channels[0],
	.num_slave_channels = ARRAY_SIZE(pl08x_slave_channels),
	.get_xfer_signal = pl08x_get_signal,
	.put_xfer_signal = pl08x_put_signal,
	.lli_buses = PL08X_AHB1,
	.mem_buses = PL08X_AHB1,
};

static struct lpc32xx_slc_platform_data lpc32xx_slc_data = {
	.dma_filter = pl08x_filter_id,
};

static struct lpc32xx_mlc_platform_data lpc32xx_mlc_data = {
	.dma_filter = pl08x_filter_id,
};

static const struct of_dev_auxdata lpc32xx_auxdata_lookup[] __initconst = {
	OF_DEV_AUXDATA("arm,pl080", 0x31000000, "pl08xdmac", &pl08x_pd),
	OF_DEV_AUXDATA("nxp,lpc3220-slc", 0x20020000, "20020000.flash",
		       &lpc32xx_slc_data),
	OF_DEV_AUXDATA("nxp,lpc3220-mlc", 0x200a8000, "200a8000.flash",
		       &lpc32xx_mlc_data),
	{ }
};

static void __init lpc3250_machine_init(void)
{
	lpc32xx_serial_init();

	of_platform_default_populate(NULL, lpc32xx_auxdata_lookup, NULL);
}

static const char *const lpc32xx_dt_compat[] __initconst = {
	"nxp,lpc3220",
	"nxp,lpc3230",
	"nxp,lpc3240",
	"nxp,lpc3250",
	NULL
};

DT_MACHINE_START(LPC32XX_DT, "LPC32XX SoC (Flattened Device Tree)")
	.atag_offset	= 0x100,
	.map_io		= lpc32xx_map_io,
	.init_machine	= lpc3250_machine_init,

Annotation

Implementation Notes