Linux 4.6-rc6
[linux/fpc-iii.git] / arch / powerpc / platforms / 85xx / p1023_rdb.c
blobd5b7509825de4bfd9418576699a17e6a76116171
1 /*
2 * Copyright 2010-2011, 2013 Freescale Semiconductor, Inc.
4 * Author: Roy Zang <tie-fei.zang@freescale.com>
6 * Description:
7 * P1023 RDB Board Setup
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the
11 * Free Software Foundation; either version 2 of the License, or (at your
12 * option) any later version.
15 #include <linux/kernel.h>
16 #include <linux/init.h>
17 #include <linux/errno.h>
18 #include <linux/pci.h>
19 #include <linux/delay.h>
20 #include <linux/module.h>
21 #include <linux/fsl_devices.h>
22 #include <linux/of_platform.h>
23 #include <linux/of_device.h>
25 #include <asm/time.h>
26 #include <asm/machdep.h>
27 #include <asm/pci-bridge.h>
28 #include <mm/mmu_decl.h>
29 #include <asm/prom.h>
30 #include <asm/udbg.h>
31 #include <asm/mpic.h>
32 #include "smp.h"
34 #include <sysdev/fsl_soc.h>
35 #include <sysdev/fsl_pci.h>
37 #include "mpc85xx.h"
39 /* ************************************************************************
41 * Setup the architecture
44 static void __init mpc85xx_rdb_setup_arch(void)
46 struct device_node *np;
48 if (ppc_md.progress)
49 ppc_md.progress("p1023_rdb_setup_arch()", 0);
51 /* Map BCSR area */
52 np = of_find_node_by_name(NULL, "bcsr");
53 if (np != NULL) {
54 static u8 __iomem *bcsr_regs;
56 bcsr_regs = of_iomap(np, 0);
57 of_node_put(np);
59 if (!bcsr_regs) {
60 printk(KERN_ERR
61 "BCSR: Failed to map bcsr register space\n");
62 return;
63 } else {
64 #define BCSR15_I2C_BUS0_SEG_CLR 0x07
65 #define BCSR15_I2C_BUS0_SEG2 0x02
67 * Note: Accessing exclusively i2c devices.
69 * The i2c controller selects initially ID EEPROM in the u-boot;
70 * but if menu configuration selects RTC support in the kernel,
71 * the i2c controller switches to select RTC chip in the kernel.
73 #ifdef CONFIG_RTC_CLASS
74 /* Enable RTC chip on the segment #2 of i2c */
75 clrbits8(&bcsr_regs[15], BCSR15_I2C_BUS0_SEG_CLR);
76 setbits8(&bcsr_regs[15], BCSR15_I2C_BUS0_SEG2);
77 #endif
79 iounmap(bcsr_regs);
83 mpc85xx_smp_init();
85 fsl_pci_assign_primary();
88 machine_arch_initcall(p1023_rdb, mpc85xx_common_publish_devices);
90 static void __init mpc85xx_rdb_pic_init(void)
92 struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN |
93 MPIC_SINGLE_DEST_CPU,
94 0, 256, " OpenPIC ");
96 BUG_ON(mpic == NULL);
98 mpic_init(mpic);
101 static int __init p1023_rdb_probe(void)
103 unsigned long root = of_get_flat_dt_root();
105 return of_flat_dt_is_compatible(root, "fsl,P1023RDB");
109 define_machine(p1023_rdb) {
110 .name = "P1023 RDB",
111 .probe = p1023_rdb_probe,
112 .setup_arch = mpc85xx_rdb_setup_arch,
113 .init_IRQ = mpc85xx_rdb_pic_init,
114 .get_irq = mpic_get_irq,
115 .restart = fsl_rstcr_restart,
116 .calibrate_decr = generic_calibrate_decr,
117 .progress = udbg_progress,
118 #ifdef CONFIG_PCI
119 .pcibios_fixup_bus = fsl_pcibios_fixup_bus,
120 .pcibios_fixup_phb = fsl_pcibios_fixup_phb,
121 #endif