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