arm: vt8500: Update arch-vt8500 to devicetree support.

Merged existing board files to a single dt-capable file.
Converted irq and timer code to devicetree.
Removed existing device files that are no longer required with
devicetree support.
All existing platform devices are converted to devicetree nodes
except PWM.

Removed restart.c and moved code into vt8500.c to remove
duplicate PMC code.

Signed-off-by: Tony Prisk <linux@prisktech.co.nz>
Acked-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 196 insertions, 0 deletions

diff --git a/arch/arm/mach-vt8500/vt8500.c b/arch/arm/mach-vt8500/vt8500.c
new file mode 100644
index 000000000000..449499354449
--- /dev/null
+++ b/arch/arm/mach-vt8500/vt8500.c
@@ -0,0 +1,196 @@
+/*
+ *  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 <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>
+
+#include <mach/restart.h>
+#include <mach/gpio.h>
+
+#include "common.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(char 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, *fb;
+        void __iomem *gpio_base;
+
+#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__);
+
+        vtwm_clk_init(pmc_base);
+
+        of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
+}
+
+static const struct of_device_id vt8500_irq_match[] __initconst = {
+        { .compatible = "via,vt8500-intc", .data = vt8500_irq_init, },
+        { /* sentinel */ },
+};
+
+static void __init vt8500_init_irq(void)
+{
+        of_irq_init(vt8500_irq_match);
+};
+
+static struct sys_timer vt8500_timer = {
+        .init = vt8500_timer_init,
+};
+
+static const char * const vt8500_dt_compat[] = {
+        "via,vt8500",
+        "wm,wm8650",
+        "wm,wm8505",
+};
+
+DT_MACHINE_START(WMT_DT, "VIA/Wondermedia SoC (Device Tree Support)")
+        .dt_compat      = vt8500_dt_compat,
+        .map_io         = vt8500_map_io,
+        .init_irq       = vt8500_init_irq,
+        .timer          = &vt8500_timer,
+        .init_machine   = vt8500_init,
+        .restart        = vt8500_restart,
+MACHINE_END
+