1 /* 2 * Copyright (C) 2008-2009 ST-Ericsson SA 3 * 4 * Author: Srinidhi KASAGAR <srinidhi.kasagar@stericsson.com> 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2, as 8 * published by the Free Software Foundation. 9 * 10 */ 11 #include <linux/types.h> 12 #include <linux/init.h> 13 #include <linux/device.h> 14 #include <linux/amba/bus.h> 15 #include <linux/interrupt.h> 16 #include <linux/irq.h> 17 #include <linux/platform_device.h> 18 #include <linux/io.h> 19 #include <linux/of.h> 20 #include <linux/of_platform.h> 21 #include <linux/perf/arm_pmu.h> 22 #include <linux/regulator/machine.h> 23 24 #include <asm/mach/map.h> 25 26 #include "setup.h" 27 28 #include "board-mop500.h" 29 #include "db8500-regs.h" 30 31 /* 32 * The PMU IRQ lines of two cores are wired together into a single interrupt. 33 * Bounce the interrupt to the other core if it's not ours. 34 */ 35 static irqreturn_t db8500_pmu_handler(int irq, void *dev, irq_handler_t handler) 36 { 37 irqreturn_t ret = handler(irq, dev); 38 int other = !smp_processor_id(); 39 40 if (ret == IRQ_NONE && cpu_online(other)) 41 irq_set_affinity(irq, cpumask_of(other)); 42 43 /* 44 * We should be able to get away with the amount of IRQ_NONEs we give, 45 * while still having the spurious IRQ detection code kick in if the 46 * interrupt really starts hitting spuriously. 47 */ 48 return ret; 49 } 50 51 static struct arm_pmu_platdata db8500_pmu_platdata = { 52 .handle_irq = db8500_pmu_handler, 53 }; 54 55 static struct of_dev_auxdata u8500_auxdata_lookup[] __initdata = { 56 /* Requires call-back bindings. */ 57 OF_DEV_AUXDATA("arm,cortex-a9-pmu", 0, "arm-pmu", &db8500_pmu_platdata), 58 /* Requires DMA bindings. */ 59 OF_DEV_AUXDATA("stericsson,ux500-msp-i2s", 0x80123000, 60 "ux500-msp-i2s.0", &msp0_platform_data), 61 OF_DEV_AUXDATA("stericsson,ux500-msp-i2s", 0x80124000, 62 "ux500-msp-i2s.1", &msp1_platform_data), 63 OF_DEV_AUXDATA("stericsson,ux500-msp-i2s", 0x80117000, 64 "ux500-msp-i2s.2", &msp2_platform_data), 65 OF_DEV_AUXDATA("stericsson,ux500-msp-i2s", 0x80125000, 66 "ux500-msp-i2s.3", &msp3_platform_data), 67 /* Requires non-DT:able platform data. */ 68 OF_DEV_AUXDATA("stericsson,db8500-prcmu", 0x80157000, "db8500-prcmu", NULL), 69 OF_DEV_AUXDATA("stericsson,ux500-cryp", 0xa03cb000, "cryp1", NULL), 70 OF_DEV_AUXDATA("stericsson,ux500-hash", 0xa03c2000, "hash1", NULL), 71 OF_DEV_AUXDATA("stericsson,snd-soc-mop500", 0, "snd-soc-mop500.0", 72 NULL), 73 {}, 74 }; 75 76 static struct of_dev_auxdata u8540_auxdata_lookup[] __initdata = { 77 OF_DEV_AUXDATA("stericsson,db8500-prcmu", 0x80157000, "db8500-prcmu", NULL), 78 {}, 79 }; 80 81 static const struct of_device_id u8500_local_bus_nodes[] = { 82 /* only create devices below soc node */ 83 { .compatible = "stericsson,db8500", }, 84 { .compatible = "stericsson,db8500-prcmu", }, 85 { .compatible = "simple-bus"}, 86 { }, 87 }; 88 89 static void __init u8500_init_machine(void) 90 { 91 /* automatically probe child nodes of dbx5x0 devices */ 92 if (of_machine_is_compatible("st-ericsson,u8540")) 93 of_platform_populate(NULL, u8500_local_bus_nodes, 94 u8540_auxdata_lookup, NULL); 95 else 96 of_platform_populate(NULL, u8500_local_bus_nodes, 97 u8500_auxdata_lookup, NULL); 98 } 99 100 static const char * stericsson_dt_platform_compat[] = { 101 "st-ericsson,u8500", 102 "st-ericsson,u8540", 103 "st-ericsson,u9500", 104 "st-ericsson,u9540", 105 NULL, 106 }; 107 108 DT_MACHINE_START(U8500_DT, "ST-Ericsson Ux5x0 platform (Device Tree Support)") 109 .l2c_aux_val = 0, 110 .l2c_aux_mask = ~0, 111 .init_irq = ux500_init_irq, 112 .init_machine = u8500_init_machine, 113 .dt_compat = stericsson_dt_platform_compat, 114 .restart = ux500_restart, 115 MACHINE_END 116