1 /* 2 * linux/arch/arm/mach-omap1/devices.c 3 * 4 * OMAP1 platform device setup/initialization 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 as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 */ 11 12 #include <linux/config.h> 13 #include <linux/module.h> 14 #include <linux/kernel.h> 15 #include <linux/init.h> 16 #include <linux/platform_device.h> 17 18 #include <asm/hardware.h> 19 #include <asm/io.h> 20 #include <asm/mach-types.h> 21 #include <asm/mach/map.h> 22 23 #include <asm/arch/tc.h> 24 #include <asm/arch/board.h> 25 #include <asm/arch/mux.h> 26 #include <asm/arch/gpio.h> 27 28 extern void omap_nop_release(struct device *dev); 29 30 /*-------------------------------------------------------------------------*/ 31 32 #if defined(CONFIG_OMAP1610_IR) || defined(CONFIG_OMAP161O_IR_MODULE) 33 34 static u64 irda_dmamask = 0xffffffff; 35 36 static struct platform_device omap1610ir_device = { 37 .name = "omap1610-ir", 38 .id = -1, 39 .dev = { 40 .release = omap_nop_release, 41 .dma_mask = &irda_dmamask, 42 }, 43 }; 44 45 static void omap_init_irda(void) 46 { 47 /* FIXME define and use a boot tag, members something like: 48 * u8 uart; // uart1, or uart3 49 * ... but driver only handles uart3 for now 50 * s16 fir_sel; // gpio for SIR vs FIR 51 * ... may prefer a callback for SIR/MIR/FIR mode select; 52 * while h2 uses a GPIO, H3 uses a gpio expander 53 */ 54 if (machine_is_omap_h2() 55 || machine_is_omap_h3()) 56 (void) platform_device_register(&omap1610ir_device); 57 } 58 #else 59 static inline void omap_init_irda(void) {} 60 #endif 61 62 /*-------------------------------------------------------------------------*/ 63 64 #if defined(CONFIG_OMAP_RTC) || defined(CONFIG_OMAP_RTC) 65 66 #define OMAP_RTC_BASE 0xfffb4800 67 68 static struct resource rtc_resources[] = { 69 { 70 .start = OMAP_RTC_BASE, 71 .end = OMAP_RTC_BASE + 0x5f, 72 .flags = IORESOURCE_MEM, 73 }, 74 { 75 .start = INT_RTC_TIMER, 76 .flags = IORESOURCE_IRQ, 77 }, 78 { 79 .start = INT_RTC_ALARM, 80 .flags = IORESOURCE_IRQ, 81 }, 82 }; 83 84 static struct platform_device omap_rtc_device = { 85 .name = "omap_rtc", 86 .id = -1, 87 .dev = { 88 .release = omap_nop_release, 89 }, 90 .num_resources = ARRAY_SIZE(rtc_resources), 91 .resource = rtc_resources, 92 }; 93 94 static void omap_init_rtc(void) 95 { 96 (void) platform_device_register(&omap_rtc_device); 97 } 98 #else 99 static inline void omap_init_rtc(void) {} 100 #endif 101 102 103 /*-------------------------------------------------------------------------*/ 104 105 /* 106 * This gets called after board-specific INIT_MACHINE, and initializes most 107 * on-chip peripherals accessible on this board (except for few like USB): 108 * 109 * (a) Does any "standard config" pin muxing needed. Board-specific 110 * code will have muxed GPIO pins and done "nonstandard" setup; 111 * that code could live in the boot loader. 112 * (b) Populating board-specific platform_data with the data drivers 113 * rely on to handle wiring variations. 114 * (c) Creating platform devices as meaningful on this board and 115 * with this kernel configuration. 116 * 117 * Claiming GPIOs, and setting their direction and initial values, is the 118 * responsibility of the device drivers. So is responding to probe(). 119 * 120 * Board-specific knowlege like creating devices or pin setup is to be 121 * kept out of drivers as much as possible. In particular, pin setup 122 * may be handled by the boot loader, and drivers should expect it will 123 * normally have been done by the time they're probed. 124 */ 125 static int __init omap1_init_devices(void) 126 { 127 /* please keep these calls, and their implementations above, 128 * in alphabetical order so they're easier to sort through. 129 */ 130 omap_init_irda(); 131 omap_init_rtc(); 132 133 return 0; 134 } 135 arch_initcall(omap1_init_devices); 136 137