2449d33a40
As multiplatform build is being adopted by more and more ARM platforms, initcall function should be used very carefully. For example, when SPEAr cpufreq driver is enabled on a kernel booted on a non-SPEAr board, we will get following boot time error: spear_cpufreq: Invalid cpufreq_tbl To eliminate this undesired the effect, the patch changes SPEAr driver to have it instantiated as a platform_driver. Then it will only run on platforms that create the platform_device "spear-cpufreq". This patch also creates platform node for SPEAr13xx boards. Reported-by: Josh Cartwright <joshc@codeaurora.org> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
68 lines
1.7 KiB
C
68 lines
1.7 KiB
C
/*
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* arch/arm/mach-spear13xx/spear1310.c
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*
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* SPEAr1310 machine source file
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*
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* Copyright (C) 2012 ST Microelectronics
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* Viresh Kumar <viresh.linux@gmail.com>
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*
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* This file is licensed under the terms of the GNU General Public
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* License version 2. This program is licensed "as is" without any
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* warranty of any kind, whether express or implied.
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*/
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#define pr_fmt(fmt) "SPEAr1310: " fmt
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#include <linux/amba/pl022.h>
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#include <linux/of_platform.h>
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#include <linux/pata_arasan_cf_data.h>
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#include <asm/mach/arch.h>
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#include <asm/mach/map.h>
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#include "generic.h"
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#include <mach/spear.h>
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/* Base addresses */
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#define SPEAR1310_RAS_GRP1_BASE UL(0xD8000000)
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#define VA_SPEAR1310_RAS_GRP1_BASE UL(0xFA000000)
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static void __init spear1310_dt_init(void)
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{
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of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
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platform_device_register_simple("spear-cpufreq", -1, NULL, 0);
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}
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static const char * const spear1310_dt_board_compat[] = {
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"st,spear1310",
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"st,spear1310-evb",
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NULL,
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};
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/*
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* Following will create 16MB static virtual/physical mappings
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* PHYSICAL VIRTUAL
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* 0xD8000000 0xFA000000
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*/
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struct map_desc spear1310_io_desc[] __initdata = {
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{
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.virtual = VA_SPEAR1310_RAS_GRP1_BASE,
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.pfn = __phys_to_pfn(SPEAR1310_RAS_GRP1_BASE),
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.length = SZ_16M,
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.type = MT_DEVICE
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},
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};
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static void __init spear1310_map_io(void)
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{
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iotable_init(spear1310_io_desc, ARRAY_SIZE(spear1310_io_desc));
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spear13xx_map_io();
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}
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DT_MACHINE_START(SPEAR1310_DT, "ST SPEAr1310 SoC with Flattened Device Tree")
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.smp = smp_ops(spear13xx_smp_ops),
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.map_io = spear1310_map_io,
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.init_time = spear13xx_timer_init,
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.init_machine = spear1310_dt_init,
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.restart = spear_restart,
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.dt_compat = spear1310_dt_board_compat,
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MACHINE_END
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