130 lines
3.3 KiB
C
130 lines
3.3 KiB
C
/*
|
|
* Copyright 2012 (C), Jason Cooper <jason@lakedaemon.net>
|
|
*
|
|
* arch/arm/mach-kirkwood/board-dt.c
|
|
*
|
|
* Flattened Device Tree board initialization
|
|
*
|
|
* This file is licensed under the terms of the GNU General Public
|
|
* License version 2. This program is licensed "as is" without any
|
|
* warranty of any kind, whether express or implied.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_platform.h>
|
|
#include <linux/clk-provider.h>
|
|
#include <linux/clocksource.h>
|
|
#include <linux/dma-mapping.h>
|
|
#include <linux/irqchip.h>
|
|
#include <linux/kexec.h>
|
|
#include <asm/mach/arch.h>
|
|
#include <asm/mach/map.h>
|
|
#include <mach/bridge-regs.h>
|
|
#include <linux/platform_data/usb-ehci-orion.h>
|
|
#include <plat/irq.h>
|
|
#include <plat/common.h>
|
|
#include "common.h"
|
|
|
|
/*
|
|
* There are still devices that doesn't know about DT yet. Get clock
|
|
* gates here and add a clock lookup alias, so that old platform
|
|
* devices still work.
|
|
*/
|
|
|
|
static void __init kirkwood_legacy_clk_init(void)
|
|
{
|
|
|
|
struct device_node *np = of_find_compatible_node(
|
|
NULL, NULL, "marvell,kirkwood-gating-clock");
|
|
struct of_phandle_args clkspec;
|
|
struct clk *clk;
|
|
|
|
clkspec.np = np;
|
|
clkspec.args_count = 1;
|
|
|
|
clkspec.args[0] = CGC_BIT_PEX0;
|
|
orion_clkdev_add("0", "pcie",
|
|
of_clk_get_from_provider(&clkspec));
|
|
|
|
clkspec.args[0] = CGC_BIT_PEX1;
|
|
orion_clkdev_add("1", "pcie",
|
|
of_clk_get_from_provider(&clkspec));
|
|
|
|
/*
|
|
* The ethernet interfaces forget the MAC address assigned by
|
|
* u-boot if the clocks are turned off. Until proper DT support
|
|
* is available we always enable them for now.
|
|
*/
|
|
clkspec.args[0] = CGC_BIT_GE0;
|
|
clk = of_clk_get_from_provider(&clkspec);
|
|
clk_prepare_enable(clk);
|
|
|
|
clkspec.args[0] = CGC_BIT_GE1;
|
|
clk = of_clk_get_from_provider(&clkspec);
|
|
clk_prepare_enable(clk);
|
|
}
|
|
|
|
static void __init kirkwood_dt_time_init(void)
|
|
{
|
|
of_clk_init(NULL);
|
|
clocksource_of_init();
|
|
}
|
|
|
|
static void __init kirkwood_dt_init_early(void)
|
|
{
|
|
mvebu_mbus_init("marvell,kirkwood-mbus",
|
|
BRIDGE_WINS_BASE, BRIDGE_WINS_SZ,
|
|
DDR_WINDOW_CPU_BASE, DDR_WINDOW_CPU_SZ);
|
|
}
|
|
|
|
static void __init kirkwood_dt_init(void)
|
|
{
|
|
pr_info("Kirkwood: %s, TCLK=%d.\n", kirkwood_id(), kirkwood_tclk);
|
|
|
|
/*
|
|
* Disable propagation of mbus errors to the CPU local bus,
|
|
* as this causes mbus errors (which can occur for example
|
|
* for PCI aborts) to throw CPU aborts, which we're not set
|
|
* up to deal with.
|
|
*/
|
|
writel(readl(CPU_CONFIG) & ~CPU_CONFIG_ERROR_PROP, CPU_CONFIG);
|
|
|
|
BUG_ON(mvebu_mbus_dt_init());
|
|
kirkwood_setup_wins();
|
|
|
|
kirkwood_l2_init();
|
|
|
|
kirkwood_cpufreq_init();
|
|
|
|
/* Setup clocks for legacy devices */
|
|
kirkwood_legacy_clk_init();
|
|
|
|
kirkwood_cpuidle_init();
|
|
|
|
#ifdef CONFIG_KEXEC
|
|
kexec_reinit = kirkwood_enable_pcie;
|
|
#endif
|
|
|
|
if (of_machine_is_compatible("marvell,mv88f6281gtw-ge"))
|
|
mv88f6281gtw_ge_init();
|
|
|
|
of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
|
|
}
|
|
|
|
static const char * const kirkwood_dt_board_compat[] = {
|
|
"marvell,kirkwood",
|
|
NULL
|
|
};
|
|
|
|
DT_MACHINE_START(KIRKWOOD_DT, "Marvell Kirkwood (Flattened Device Tree)")
|
|
/* Maintainer: Jason Cooper <jason@lakedaemon.net> */
|
|
.map_io = kirkwood_map_io,
|
|
.init_early = kirkwood_dt_init_early,
|
|
.init_time = kirkwood_dt_time_init,
|
|
.init_machine = kirkwood_dt_init,
|
|
.restart = kirkwood_restart,
|
|
.dt_compat = kirkwood_dt_board_compat,
|
|
MACHINE_END
|