mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-29 22:14:41 +08:00
64cc69abbb
With arch/arm calling of_clk_init(NULL) from time_init(), we can now remove custom .init_time hooks. Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com> Acked-by: Tony Prisk <linux@prisktech.co.nz>
181 lines
4.4 KiB
C
181 lines
4.4 KiB
C
/*
|
|
* arch/arm/mach-vt8500/vt8500.c
|
|
*
|
|
* Copyright (C) 2012 Tony Prisk <linux@prisktech.co.nz>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
#include <linux/io.h>
|
|
#include <linux/pm.h>
|
|
#include <linux/reboot.h>
|
|
|
|
#include <asm/mach-types.h>
|
|
#include <asm/mach/arch.h>
|
|
#include <asm/mach/time.h>
|
|
#include <asm/mach/map.h>
|
|
|
|
#include <linux/of.h>
|
|
#include <linux/of_address.h>
|
|
#include <linux/of_irq.h>
|
|
#include <linux/of_platform.h>
|
|
|
|
#define LEGACY_GPIO_BASE 0xD8110000
|
|
#define LEGACY_PMC_BASE 0xD8130000
|
|
|
|
/* Registers in GPIO Controller */
|
|
#define VT8500_GPIO_MUX_REG 0x200
|
|
|
|
/* Registers in Power Management Controller */
|
|
#define VT8500_HCR_REG 0x12
|
|
#define VT8500_PMSR_REG 0x60
|
|
|
|
static void __iomem *pmc_base;
|
|
|
|
void vt8500_restart(enum reboot_mode mode, const char *cmd)
|
|
{
|
|
if (pmc_base)
|
|
writel(1, pmc_base + VT8500_PMSR_REG);
|
|
}
|
|
|
|
static struct map_desc vt8500_io_desc[] __initdata = {
|
|
/* SoC MMIO registers */
|
|
[0] = {
|
|
.virtual = 0xf8000000,
|
|
.pfn = __phys_to_pfn(0xd8000000),
|
|
.length = 0x00390000, /* max of all chip variants */
|
|
.type = MT_DEVICE
|
|
},
|
|
};
|
|
|
|
void __init vt8500_map_io(void)
|
|
{
|
|
iotable_init(vt8500_io_desc, ARRAY_SIZE(vt8500_io_desc));
|
|
}
|
|
|
|
static void vt8500_power_off(void)
|
|
{
|
|
local_irq_disable();
|
|
writew(5, pmc_base + VT8500_HCR_REG);
|
|
asm("mcr%? p15, 0, %0, c7, c0, 4" : : "r" (0));
|
|
}
|
|
|
|
void __init vt8500_init(void)
|
|
{
|
|
struct device_node *np;
|
|
#if defined(CONFIG_FB_VT8500) || defined(CONFIG_FB_WM8505)
|
|
struct device_node *fb;
|
|
void __iomem *gpio_base;
|
|
#endif
|
|
|
|
#ifdef CONFIG_FB_VT8500
|
|
fb = of_find_compatible_node(NULL, NULL, "via,vt8500-fb");
|
|
if (fb) {
|
|
np = of_find_compatible_node(NULL, NULL, "via,vt8500-gpio");
|
|
if (np) {
|
|
gpio_base = of_iomap(np, 0);
|
|
|
|
if (!gpio_base)
|
|
pr_err("%s: of_iomap(gpio_mux) failed\n",
|
|
__func__);
|
|
|
|
of_node_put(np);
|
|
} else {
|
|
gpio_base = ioremap(LEGACY_GPIO_BASE, 0x1000);
|
|
if (!gpio_base)
|
|
pr_err("%s: ioremap(legacy_gpio_mux) failed\n",
|
|
__func__);
|
|
}
|
|
if (gpio_base) {
|
|
writel(readl(gpio_base + VT8500_GPIO_MUX_REG) | 1,
|
|
gpio_base + VT8500_GPIO_MUX_REG);
|
|
iounmap(gpio_base);
|
|
} else
|
|
pr_err("%s: Could not remap GPIO mux\n", __func__);
|
|
|
|
of_node_put(fb);
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_FB_WM8505
|
|
fb = of_find_compatible_node(NULL, NULL, "wm,wm8505-fb");
|
|
if (fb) {
|
|
np = of_find_compatible_node(NULL, NULL, "wm,wm8505-gpio");
|
|
if (!np)
|
|
np = of_find_compatible_node(NULL, NULL,
|
|
"wm,wm8650-gpio");
|
|
if (np) {
|
|
gpio_base = of_iomap(np, 0);
|
|
|
|
if (!gpio_base)
|
|
pr_err("%s: of_iomap(gpio_mux) failed\n",
|
|
__func__);
|
|
|
|
of_node_put(np);
|
|
} else {
|
|
gpio_base = ioremap(LEGACY_GPIO_BASE, 0x1000);
|
|
if (!gpio_base)
|
|
pr_err("%s: ioremap(legacy_gpio_mux) failed\n",
|
|
__func__);
|
|
}
|
|
if (gpio_base) {
|
|
writel(readl(gpio_base + VT8500_GPIO_MUX_REG) |
|
|
0x80000000, gpio_base + VT8500_GPIO_MUX_REG);
|
|
iounmap(gpio_base);
|
|
} else
|
|
pr_err("%s: Could not remap GPIO mux\n", __func__);
|
|
|
|
of_node_put(fb);
|
|
}
|
|
#endif
|
|
|
|
np = of_find_compatible_node(NULL, NULL, "via,vt8500-pmc");
|
|
if (np) {
|
|
pmc_base = of_iomap(np, 0);
|
|
|
|
if (!pmc_base)
|
|
pr_err("%s:of_iomap(pmc) failed\n", __func__);
|
|
|
|
of_node_put(np);
|
|
} else {
|
|
pmc_base = ioremap(LEGACY_PMC_BASE, 0x1000);
|
|
if (!pmc_base)
|
|
pr_err("%s:ioremap(power_off) failed\n", __func__);
|
|
}
|
|
if (pmc_base)
|
|
pm_power_off = &vt8500_power_off;
|
|
else
|
|
pr_err("%s: PMC Hibernation register could not be remapped, not enabling power off!\n", __func__);
|
|
|
|
of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
|
|
}
|
|
|
|
static const char * const vt8500_dt_compat[] = {
|
|
"via,vt8500",
|
|
"wm,wm8650",
|
|
"wm,wm8505",
|
|
"wm,wm8750",
|
|
"wm,wm8850",
|
|
NULL
|
|
};
|
|
|
|
DT_MACHINE_START(WMT_DT, "VIA/Wondermedia SoC (Device Tree Support)")
|
|
.dt_compat = vt8500_dt_compat,
|
|
.map_io = vt8500_map_io,
|
|
.init_machine = vt8500_init,
|
|
.restart = vt8500_restart,
|
|
MACHINE_END
|
|
|