forked from luck/tmp_suning_uos_patched
5c334eed6e
Using device_initcall makes it happen for every platform that compiles this file in. This is really bad, for obvious reasons. Instead, we use the .init field of the machine description. If the platform needs the hook to do something specific it can provides its own function and call mpc52xx_declare_of_platform_devices from there. If not, the mpc52xx_declare_of_platform_devices function can directly be used as the init hook. Signed-off-by: Sylvain Munaut <tnt@246tNt.com> Acked-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Paul Mackerras <paulus@samba.org>
162 lines
3.7 KiB
C
162 lines
3.7 KiB
C
/*
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* Freescale Lite5200 board support
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*
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* Written by: Grant Likely <grant.likely@secretlab.ca>
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*
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* Copyright (C) Secret Lab Technologies Ltd. 2006. All rights reserved.
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* Copyright (C) Freescale Semicondutor, Inc. 2006. All rights reserved.
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*
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* Description:
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* This program 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 the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#undef DEBUG
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#include <linux/stddef.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/errno.h>
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#include <linux/reboot.h>
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#include <linux/pci.h>
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#include <linux/kdev_t.h>
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#include <linux/major.h>
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#include <linux/console.h>
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#include <linux/delay.h>
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#include <linux/seq_file.h>
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#include <linux/root_dev.h>
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#include <linux/initrd.h>
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#include <asm/system.h>
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#include <asm/atomic.h>
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#include <asm/time.h>
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#include <asm/io.h>
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#include <asm/machdep.h>
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#include <asm/ipic.h>
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#include <asm/bootinfo.h>
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#include <asm/irq.h>
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#include <asm/prom.h>
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#include <asm/udbg.h>
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#include <sysdev/fsl_soc.h>
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#include <asm/of_platform.h>
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#include <asm/mpc52xx.h>
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/* ************************************************************************
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*
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* Setup the architecture
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*
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*/
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static void __init
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lite52xx_setup_cpu(void)
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{
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struct mpc52xx_gpio __iomem *gpio;
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u32 port_config;
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/* Map zones */
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gpio = mpc52xx_find_and_map("mpc52xx-gpio");
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if (!gpio) {
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printk(KERN_ERR __FILE__ ": "
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"Error while mapping GPIO register for port config. "
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"Expect some abnormal behavior\n");
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goto error;
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}
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/* Set port config */
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port_config = in_be32(&gpio->port_config);
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port_config &= ~0x00800000; /* 48Mhz internal, pin is GPIO */
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port_config &= ~0x00007000; /* USB port : Differential mode */
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port_config |= 0x00001000; /* USB 1 only */
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port_config &= ~0x03000000; /* ATA CS is on csb_4/5 */
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port_config |= 0x01000000;
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pr_debug("port_config: old:%x new:%x\n",
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in_be32(&gpio->port_config), port_config);
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out_be32(&gpio->port_config, port_config);
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/* Unmap zone */
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error:
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iounmap(gpio);
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}
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static void __init lite52xx_setup_arch(void)
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{
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struct device_node *np;
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if (ppc_md.progress)
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ppc_md.progress("lite52xx_setup_arch()", 0);
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np = of_find_node_by_type(NULL, "cpu");
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if (np) {
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unsigned int *fp =
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(int *)get_property(np, "clock-frequency", NULL);
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if (fp != 0)
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loops_per_jiffy = *fp / HZ;
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else
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loops_per_jiffy = 50000000 / HZ;
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of_node_put(np);
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}
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/* CPU & Port mux setup */
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mpc52xx_setup_cpu(); /* Generic */
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lite52xx_setup_cpu(); /* Platorm specific */
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#ifdef CONFIG_BLK_DEV_INITRD
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if (initrd_start)
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ROOT_DEV = Root_RAM0;
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else
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#endif
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#ifdef CONFIG_ROOT_NFS
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ROOT_DEV = Root_NFS;
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#else
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ROOT_DEV = Root_HDA1;
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#endif
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}
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void lite52xx_show_cpuinfo(struct seq_file *m)
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{
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struct device_node* np = of_find_all_nodes(NULL);
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const char *model = NULL;
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if (np)
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model = get_property(np, "model", NULL);
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seq_printf(m, "vendor\t\t: Freescale Semiconductor\n");
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seq_printf(m, "machine\t\t: %s\n", model ? model : "unknown");
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of_node_put(np);
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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 lite52xx_probe(void)
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{
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unsigned long node = of_get_flat_dt_root();
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const char *model = of_get_flat_dt_prop(node, "model", NULL);
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if (!of_flat_dt_is_compatible(node, "lite52xx"))
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return 0;
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pr_debug("%s board w/ mpc52xx found\n", model ? model : "unknown");
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return 1;
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}
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define_machine(lite52xx) {
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.name = "lite52xx",
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.probe = lite52xx_probe,
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.setup_arch = lite52xx_setup_arch,
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.init = mpc52xx_declare_of_platform_devices,
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.init_IRQ = mpc52xx_init_irq,
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.get_irq = mpc52xx_get_irq,
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.show_cpuinfo = lite52xx_show_cpuinfo,
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.calibrate_decr = generic_calibrate_decr,
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};
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