/*
* arch/arm/mach-spear6xx/spear6xx.c
*
* SPEAr6XX machines common source file
*
* Copyright (C) 2009 ST Microelectronics
* Rajeev Kumar<rajeev-dlh.kumar@st.com>
*
* Copyright 2012 Stefan Roese <sr@denx.de>
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*/
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <asm/hardware/vic.h>
#include <asm/mach/arch.h>
#include <mach/generic.h>
#include <mach/hardware.h>
/* Following will create static virtual/physical mappings */
static struct map_desc spear6xx_io_desc[] __initdata = {
{
.virtual = VA_SPEAR6XX_ICM1_UART0_BASE,
.pfn = __phys_to_pfn(SPEAR6XX_ICM1_UART0_BASE),
.length = SZ_4K,
.type = MT_DEVICE
}, {
.virtual = VA_SPEAR6XX_CPU_VIC_PRI_BASE,
.pfn = __phys_to_pfn(SPEAR6XX_CPU_VIC_PRI_BASE),
.length = SZ_4K,
.type = MT_DEVICE
}, {
.virtual = VA_SPEAR6XX_CPU_VIC_SEC_BASE,
.pfn = __phys_to_pfn(SPEAR6XX_CPU_VIC_SEC_BASE),
.length = SZ_4K,
.type = MT_DEVICE
}, {
.virtual = VA_SPEAR6XX_ICM3_SYS_CTRL_BASE,
.pfn = __phys_to_pfn(SPEAR6XX_ICM3_SYS_CTRL_BASE),
.length = SZ_4K,
.type = MT_DEVICE
}, {
.virtual = VA_SPEAR6XX_ICM3_MISC_REG_BASE,
.pfn = __phys_to_pfn(SPEAR6XX_ICM3_MISC_REG_BASE),
.length = SZ_4K,
.type = MT_DEVICE
},
};
/* This will create static memory mapping for selected devices */
void __init spear6xx_map_io(void)
{
iotable_init(spear6xx_io_desc, ARRAY_SIZE(spear6xx_io_desc));
/* This will initialize clock framework */
spear6xx_clk_init();
}
static void __init spear6xx_timer_init(void)
{
char pclk_name[] = "pll3_48m_clk";
struct clk *gpt_clk, *pclk;
/* get the system timer clock */
gpt_clk = clk_get_sys("gpt0", NULL);
if (IS_ERR(gpt_clk)) {
pr_err("%s:couldn't get clk for gpt\n", __func__);
BUG();
}
/* get the suitable parent clock for timer*/
pclk = clk_get(NULL, pclk_name);
if (IS_ERR(pclk)) {
pr_err("%s:couldn't get %s as parent for gpt\n",
__func__, pclk_name);
BUG();
}
clk_set_parent(gpt_clk, pclk);
clk_put(gpt_clk);
clk_put(pclk);
spear_setup_timer();
}
struct sys_timer spear6xx_timer = {
.init = spear6xx_timer_init,
};
static void __init spear600_dt_init(void)
{
of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
}
static const char *spear600_dt_board_compat[] = {
"st,spear600",
NULL
};
static const struct of_device_id vic_of_match[] __initconst = {
{ .compatible = "arm,pl190-vic", .data = vic_of_init, },
{ /* Sentinel */ }
};
static void __init spear6xx_dt_init_irq(void)
{
of_irq_init(vic_of_match);
}
DT_MACHINE_START(SPEAR600_DT, "ST SPEAr600 (Flattened Device Tree)")
.map_io = spear6xx_map_io,
.init_irq = spear6xx_dt_init_irq,
.handle_irq = vic_handle_irq,
.timer = &spear6xx_timer,
.init_machine = spear600_dt_init,
.restart = spear_restart,
.dt_compat = spear600_dt_board_compat,
MACHINE_END
