49dd0dcfd7
The ASM below does not compile with clang and is not the way that the mcr
command is used in other parts of the kernel.
arch/arm/mach-vt8500/vt8500.c:72:11: error: invalid % escape in inline assembly string
asm("mcr%? p15, 0, %0, c7, c0, 4" : : "r" (0));
~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
1 error generated.
There are other forms that are supported on different ARM instruction sets but
generally the kernel just uses mcr as it is supported in all ARM instruction
sets.
Signed-off-by: Behan Webster <behanw@converseincode.com>
Reviewed-by: Mark Charlebois <charlebm@gmail.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Acked-by: Tony Prisk <linux@prisktech.co.nz>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
181 lines
4.4 KiB
C
181 lines
4.4 KiB
C
/*
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* arch/arm/mach-vt8500/vt8500.c
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*
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* Copyright (C) 2012 Tony Prisk <linux@prisktech.co.nz>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/io.h>
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#include <linux/pm.h>
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#include <linux/reboot.h>
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#include <asm/mach-types.h>
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#include <asm/mach/arch.h>
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#include <asm/mach/time.h>
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#include <asm/mach/map.h>
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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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#define LEGACY_GPIO_BASE 0xD8110000
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#define LEGACY_PMC_BASE 0xD8130000
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/* Registers in GPIO Controller */
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#define VT8500_GPIO_MUX_REG 0x200
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/* Registers in Power Management Controller */
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#define VT8500_HCR_REG 0x12
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#define VT8500_PMSR_REG 0x60
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static void __iomem *pmc_base;
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static void vt8500_restart(enum reboot_mode mode, const char *cmd)
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{
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if (pmc_base)
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writel(1, pmc_base + VT8500_PMSR_REG);
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}
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static struct map_desc vt8500_io_desc[] __initdata = {
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/* SoC MMIO registers */
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[0] = {
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.virtual = 0xf8000000,
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.pfn = __phys_to_pfn(0xd8000000),
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.length = 0x00390000, /* max of all chip variants */
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.type = MT_DEVICE
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},
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};
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static void __init vt8500_map_io(void)
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{
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iotable_init(vt8500_io_desc, ARRAY_SIZE(vt8500_io_desc));
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}
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static void vt8500_power_off(void)
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{
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local_irq_disable();
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writew(5, pmc_base + VT8500_HCR_REG);
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asm("mcr p15, 0, %0, c7, c0, 4" : : "r" (0));
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}
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static void __init vt8500_init(void)
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{
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struct device_node *np;
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#if defined(CONFIG_FB_VT8500) || defined(CONFIG_FB_WM8505)
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struct device_node *fb;
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void __iomem *gpio_base;
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#endif
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#ifdef CONFIG_FB_VT8500
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fb = of_find_compatible_node(NULL, NULL, "via,vt8500-fb");
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if (fb) {
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np = of_find_compatible_node(NULL, NULL, "via,vt8500-gpio");
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if (np) {
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gpio_base = of_iomap(np, 0);
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if (!gpio_base)
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pr_err("%s: of_iomap(gpio_mux) failed\n",
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__func__);
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of_node_put(np);
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} else {
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gpio_base = ioremap(LEGACY_GPIO_BASE, 0x1000);
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if (!gpio_base)
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pr_err("%s: ioremap(legacy_gpio_mux) failed\n",
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__func__);
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}
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if (gpio_base) {
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writel(readl(gpio_base + VT8500_GPIO_MUX_REG) | 1,
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gpio_base + VT8500_GPIO_MUX_REG);
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iounmap(gpio_base);
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} else
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pr_err("%s: Could not remap GPIO mux\n", __func__);
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of_node_put(fb);
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}
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#endif
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#ifdef CONFIG_FB_WM8505
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fb = of_find_compatible_node(NULL, NULL, "wm,wm8505-fb");
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if (fb) {
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np = of_find_compatible_node(NULL, NULL, "wm,wm8505-gpio");
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if (!np)
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np = of_find_compatible_node(NULL, NULL,
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"wm,wm8650-gpio");
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if (np) {
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gpio_base = of_iomap(np, 0);
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if (!gpio_base)
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pr_err("%s: of_iomap(gpio_mux) failed\n",
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__func__);
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of_node_put(np);
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} else {
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gpio_base = ioremap(LEGACY_GPIO_BASE, 0x1000);
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if (!gpio_base)
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pr_err("%s: ioremap(legacy_gpio_mux) failed\n",
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__func__);
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}
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if (gpio_base) {
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writel(readl(gpio_base + VT8500_GPIO_MUX_REG) |
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0x80000000, gpio_base + VT8500_GPIO_MUX_REG);
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iounmap(gpio_base);
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} else
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pr_err("%s: Could not remap GPIO mux\n", __func__);
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of_node_put(fb);
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}
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#endif
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np = of_find_compatible_node(NULL, NULL, "via,vt8500-pmc");
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if (np) {
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pmc_base = of_iomap(np, 0);
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if (!pmc_base)
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pr_err("%s:of_iomap(pmc) failed\n", __func__);
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of_node_put(np);
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} else {
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pmc_base = ioremap(LEGACY_PMC_BASE, 0x1000);
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if (!pmc_base)
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pr_err("%s:ioremap(power_off) failed\n", __func__);
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}
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if (pmc_base)
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pm_power_off = &vt8500_power_off;
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else
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pr_err("%s: PMC Hibernation register could not be remapped, not enabling power off!\n", __func__);
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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 * const vt8500_dt_compat[] = {
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"via,vt8500",
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"wm,wm8650",
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"wm,wm8505",
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"wm,wm8750",
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"wm,wm8850",
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NULL
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};
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DT_MACHINE_START(WMT_DT, "VIA/Wondermedia SoC (Device Tree Support)")
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.dt_compat = vt8500_dt_compat,
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.map_io = vt8500_map_io,
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.init_machine = vt8500_init,
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.restart = vt8500_restart,
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MACHINE_END
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