mirror of https://gitee.com/openkylin/linux.git
93 lines
2.7 KiB
C
93 lines
2.7 KiB
C
/*
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* linux/arch/arm/plat-omap/devices.c
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*
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* Common platform device setup/initialization for OMAP1 and OMAP2
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*
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* This program is free software; you can redistribute it and/or modify
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* it 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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#include <linux/gpio.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <linux/io.h>
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#include <linux/slab.h>
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#include <linux/memblock.h>
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#include <mach/hardware.h>
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#include <asm/mach-types.h>
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#include <asm/mach/map.h>
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#include <asm/memblock.h>
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#include <plat/tc.h>
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#include <plat/board.h>
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#include <plat/mmc.h>
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#include <plat/menelaus.h>
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#include <plat/omap44xx.h>
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/*-------------------------------------------------------------------------*/
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#if defined(CONFIG_HW_RANDOM_OMAP) || defined(CONFIG_HW_RANDOM_OMAP_MODULE)
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#ifdef CONFIG_ARCH_OMAP2
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#define OMAP_RNG_BASE 0x480A0000
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#else
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#define OMAP_RNG_BASE 0xfffe5000
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#endif
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static struct resource rng_resources[] = {
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{
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.start = OMAP_RNG_BASE,
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.end = OMAP_RNG_BASE + 0x4f,
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.flags = IORESOURCE_MEM,
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},
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};
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static struct platform_device omap_rng_device = {
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.name = "omap_rng",
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.id = -1,
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.num_resources = ARRAY_SIZE(rng_resources),
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.resource = rng_resources,
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};
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static void omap_init_rng(void)
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{
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(void) platform_device_register(&omap_rng_device);
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}
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#else
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static inline void omap_init_rng(void) {}
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#endif
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/*
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* This gets called after board-specific INIT_MACHINE, and initializes most
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* on-chip peripherals accessible on this board (except for few like USB):
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*
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* (a) Does any "standard config" pin muxing needed. Board-specific
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* code will have muxed GPIO pins and done "nonstandard" setup;
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* that code could live in the boot loader.
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* (b) Populating board-specific platform_data with the data drivers
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* rely on to handle wiring variations.
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* (c) Creating platform devices as meaningful on this board and
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* with this kernel configuration.
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*
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* Claiming GPIOs, and setting their direction and initial values, is the
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* responsibility of the device drivers. So is responding to probe().
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*
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* Board-specific knowledge like creating devices or pin setup is to be
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* kept out of drivers as much as possible. In particular, pin setup
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* may be handled by the boot loader, and drivers should expect it will
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* normally have been done by the time they're probed.
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*/
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static int __init omap_init_devices(void)
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{
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/* please keep these calls, and their implementations above,
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* in alphabetical order so they're easier to sort through.
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*/
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omap_init_rng();
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return 0;
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}
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arch_initcall(omap_init_devices);
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