124 lines
3.0 KiB
C
124 lines
3.0 KiB
C
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/*
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* arch/arm/mach-spear6xx/spear6xx.c
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*
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* SPEAr6XX machines common source file
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*
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* Copyright (C) 2009 ST Microelectronics
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* Rajeev Kumar<rajeev-dlh.kumar@st.com>
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*
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* Copyright 2012 Stefan Roese <sr@denx.de>
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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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#include <linux/of.h>
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#include <linux/of_address.h>
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#include <linux/of_irq.h>
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#include <linux/of_platform.h>
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#include <asm/hardware/vic.h>
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#include <asm/mach/arch.h>
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#include <mach/generic.h>
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#include <mach/hardware.h>
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/* Following will create static virtual/physical mappings */
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static struct map_desc spear6xx_io_desc[] __initdata = {
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{
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.virtual = VA_SPEAR6XX_ICM1_UART0_BASE,
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.pfn = __phys_to_pfn(SPEAR6XX_ICM1_UART0_BASE),
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.length = SZ_4K,
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.type = MT_DEVICE
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}, {
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.virtual = VA_SPEAR6XX_CPU_VIC_PRI_BASE,
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.pfn = __phys_to_pfn(SPEAR6XX_CPU_VIC_PRI_BASE),
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.length = SZ_4K,
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.type = MT_DEVICE
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}, {
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.virtual = VA_SPEAR6XX_CPU_VIC_SEC_BASE,
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.pfn = __phys_to_pfn(SPEAR6XX_CPU_VIC_SEC_BASE),
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.length = SZ_4K,
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.type = MT_DEVICE
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}, {
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.virtual = VA_SPEAR6XX_ICM3_SYS_CTRL_BASE,
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.pfn = __phys_to_pfn(SPEAR6XX_ICM3_SYS_CTRL_BASE),
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.length = SZ_4K,
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.type = MT_DEVICE
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}, {
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.virtual = VA_SPEAR6XX_ICM3_MISC_REG_BASE,
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.pfn = __phys_to_pfn(SPEAR6XX_ICM3_MISC_REG_BASE),
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.length = SZ_4K,
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.type = MT_DEVICE
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},
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};
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/* This will create static memory mapping for selected devices */
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void __init spear6xx_map_io(void)
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{
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iotable_init(spear6xx_io_desc, ARRAY_SIZE(spear6xx_io_desc));
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/* This will initialize clock framework */
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spear6xx_clk_init();
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}
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static void __init spear6xx_timer_init(void)
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{
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char pclk_name[] = "pll3_48m_clk";
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struct clk *gpt_clk, *pclk;
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/* get the system timer clock */
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gpt_clk = clk_get_sys("gpt0", NULL);
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if (IS_ERR(gpt_clk)) {
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pr_err("%s:couldn't get clk for gpt\n", __func__);
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BUG();
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}
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/* get the suitable parent clock for timer*/
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pclk = clk_get(NULL, pclk_name);
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if (IS_ERR(pclk)) {
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pr_err("%s:couldn't get %s as parent for gpt\n",
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__func__, pclk_name);
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BUG();
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}
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clk_set_parent(gpt_clk, pclk);
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clk_put(gpt_clk);
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clk_put(pclk);
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spear_setup_timer();
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}
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struct sys_timer spear6xx_timer = {
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.init = spear6xx_timer_init,
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};
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static void __init spear600_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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}
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static const char *spear600_dt_board_compat[] = {
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"st,spear600",
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NULL
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};
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static const struct of_device_id vic_of_match[] __initconst = {
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{ .compatible = "arm,pl190-vic", .data = vic_of_init, },
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{ /* Sentinel */ }
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};
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static void __init spear6xx_dt_init_irq(void)
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{
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of_irq_init(vic_of_match);
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}
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DT_MACHINE_START(SPEAR600_DT, "ST SPEAr600 (Flattened Device Tree)")
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.map_io = spear6xx_map_io,
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.init_irq = spear6xx_dt_init_irq,
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.handle_irq = vic_handle_irq,
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.timer = &spear6xx_timer,
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.init_machine = spear600_dt_init,
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.restart = spear_restart,
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.dt_compat = spear600_dt_board_compat,
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MACHINE_END
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