e177edcd15
512x is very similar to 83xx and most
of this is patterned after code from 83xx.
New platform:
changed:
arch/powerpc/Kconfig
arch/powerpc/platforms/Kconfig
arch/powerpc/platforms/Kconfig.cputype
arch/powerpc/platforms/Makefile
new:
arch/powerpc/platforms/512x/*
include/asm-powerpc/mpc512x.h
Signed-off-by: John Rigby <jrigby@freescale.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
104 lines
2.4 KiB
C
104 lines
2.4 KiB
C
/*
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* Copyright (C) 2007 Freescale Semiconductor, Inc. All rights reserved.
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*
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* Author: John Rigby, <jrigby@freescale.com>, Thur Mar 29 2007
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*
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* Description:
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* MPC5121 ADS board setup
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*
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* This is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/io.h>
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#include <linux/irq.h>
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#include <linux/of_platform.h>
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#include <asm/machdep.h>
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#include <asm/ipic.h>
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#include <asm/prom.h>
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#include <asm/time.h>
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/**
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* mpc512x_find_ips_freq - Find the IPS bus frequency for a device
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* @node: device node
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*
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* Returns IPS bus frequency, or 0 if the bus frequency cannot be found.
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*/
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unsigned long
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mpc512x_find_ips_freq(struct device_node *node)
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{
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struct device_node *np;
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const unsigned int *p_ips_freq = NULL;
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of_node_get(node);
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while (node) {
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p_ips_freq = of_get_property(node, "bus-frequency", NULL);
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if (p_ips_freq)
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break;
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np = of_get_parent(node);
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of_node_put(node);
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node = np;
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}
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if (node)
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of_node_put(node);
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return p_ips_freq ? *p_ips_freq : 0;
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}
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EXPORT_SYMBOL(mpc512x_find_ips_freq);
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static struct of_device_id __initdata of_bus_ids[] = {
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{ .name = "soc", },
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{ .name = "localbus", },
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{},
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};
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static void __init mpc5121_ads_declare_of_platform_devices(void)
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{
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/* Find every child of the SOC node and add it to of_platform */
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if (of_platform_bus_probe(NULL, of_bus_ids, NULL))
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printk(KERN_ERR __FILE__ ": "
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"Error while probing of_platform bus\n");
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}
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static void __init mpc5121_ads_init_IRQ(void)
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{
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struct device_node *np;
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np = of_find_compatible_node(NULL, NULL, "fsl,ipic");
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if (!np)
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return;
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ipic_init(np, 0);
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of_node_put(np);
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/*
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* Initialize the default interrupt mapping priorities,
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* in case the boot rom changed something on us.
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*/
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ipic_set_default_priority();
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}
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/*
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* Called very early, MMU is off, device-tree isn't unflattened
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*/
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static int __init mpc5121_ads_probe(void)
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{
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unsigned long root = of_get_flat_dt_root();
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return of_flat_dt_is_compatible(root, "fsl,mpc5121ads");
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}
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define_machine(mpc5121_ads) {
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.name = "MPC5121 ADS",
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.probe = mpc5121_ads_probe,
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.init = mpc5121_ads_declare_of_platform_devices,
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.init_IRQ = mpc5121_ads_init_IRQ,
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.get_irq = ipic_get_irq,
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.calibrate_decr = generic_calibrate_decr,
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};
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