spear6xx.c
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/*
* arch/arm/mach-spear6xx/spear6xx.c
*
* SPEAr6XX machines common source file
*
* Copyright (C) 2009 ST Microelectronics
* Rajeev Kumar<rajeev-dlh.kumar@st.com>
*
* 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/types.h>
#include <linux/amba/pl061.h>
#include <linux/ptrace.h>
#include <linux/io.h>
#include <asm/hardware/vic.h>
#include <asm/irq.h>
#include <asm/mach/arch.h>
#include <mach/generic.h>
#include <mach/hardware.h>
#include <mach/irqs.h>
/* Add spear6xx machines common devices here */
/* uart device registration */
struct amba_device uart_device[] = {
{
.dev = {
.init_name = "uart0",
},
.res = {
.start = SPEAR6XX_ICM1_UART0_BASE,
.end = SPEAR6XX_ICM1_UART0_BASE + SZ_4K - 1,
.flags = IORESOURCE_MEM,
},
.irq = {IRQ_UART_0, NO_IRQ},
}, {
.dev = {
.init_name = "uart1",
},
.res = {
.start = SPEAR6XX_ICM1_UART1_BASE,
.end = SPEAR6XX_ICM1_UART1_BASE + SZ_4K - 1,
.flags = IORESOURCE_MEM,
},
.irq = {IRQ_UART_1, NO_IRQ},
}
};
/* gpio device registration */
static struct pl061_platform_data gpio_plat_data[] = {
{
.gpio_base = 0,
.irq_base = SPEAR_GPIO0_INT_BASE,
}, {
.gpio_base = 8,
.irq_base = SPEAR_GPIO1_INT_BASE,
}, {
.gpio_base = 16,
.irq_base = SPEAR_GPIO2_INT_BASE,
},
};
struct amba_device gpio_device[] = {
{
.dev = {
.init_name = "gpio0",
.platform_data = &gpio_plat_data[0],
},
.res = {
.start = SPEAR6XX_CPU_GPIO_BASE,
.end = SPEAR6XX_CPU_GPIO_BASE + SZ_4K - 1,
.flags = IORESOURCE_MEM,
},
.irq = {IRQ_LOCAL_GPIO, NO_IRQ},
}, {
.dev = {
.init_name = "gpio1",
.platform_data = &gpio_plat_data[1],
},
.res = {
.start = SPEAR6XX_ICM3_GPIO_BASE,
.end = SPEAR6XX_ICM3_GPIO_BASE + SZ_4K - 1,
.flags = IORESOURCE_MEM,
},
.irq = {IRQ_BASIC_GPIO, NO_IRQ},
}, {
.dev = {
.init_name = "gpio2",
.platform_data = &gpio_plat_data[2],
},
.res = {
.start = SPEAR6XX_ICM2_GPIO_BASE,
.end = SPEAR6XX_ICM2_GPIO_BASE + SZ_4K - 1,
.flags = IORESOURCE_MEM,
},
.irq = {IRQ_APPL_GPIO, NO_IRQ},
}
};
/* This will add devices, and do machine specific tasks */
void __init spear6xx_init(void)
{
/* nothing to do for now */
}
/* This will initialize vic */
void __init spear6xx_init_irq(void)
{
vic_init((void __iomem *)VA_SPEAR6XX_CPU_VIC_PRI_BASE, 0, ~0, 0);
vic_init((void __iomem *)VA_SPEAR6XX_CPU_VIC_SEC_BASE, 32, ~0, 0);
}
/* 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,
};