arm/imx6q: add device tree machine support

It adds generic device tree based machine support for imx6q.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

1 files changed, 84 insertions, 0 deletions

diff --git a/arch/arm/mach-imx/mach-imx6q.c b/arch/arm/mach-imx/mach-imx6q.c
new file mode 100644
index 000000000000..8bf5fa349484
--- /dev/null
+++ b/arch/arm/mach-imx/mach-imx6q.c
@@ -0,0 +1,84 @@
+/*
+ * Copyright 2011 Freescale Semiconductor, Inc.
+ * Copyright 2011 Linaro Ltd.
+ *
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+#include <linux/init.h>
+#include <linux/irq.h>
+#include <linux/irqdomain.h>
+#include <linux/of.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+#include <asm/hardware/cache-l2x0.h>
+#include <asm/hardware/gic.h>
+#include <asm/mach/arch.h>
+#include <asm/mach/time.h>
+#include <mach/common.h>
+#include <mach/hardware.h>
+
+static void __init imx6q_init_machine(void)
+{
+        of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
+
+        imx6q_pm_init();
+}
+
+static void __init imx6q_map_io(void)
+{
+        imx_lluart_map_io();
+        imx_scu_map_io();
+}
+
+static void __init imx6q_gpio_add_irq_domain(struct device_node *np,
+                                struct device_node *interrupt_parent)
+{
+        static int gpio_irq_base = MXC_GPIO_IRQ_START + ARCH_NR_GPIOS -
+                                   32 * 7; /* imx6q gets 7 gpio ports */
+
+        irq_domain_add_simple(np, gpio_irq_base);
+        gpio_irq_base += 32;
+}
+
+static const struct of_device_id imx6q_irq_match[] __initconst = {
+        { .compatible = "arm,cortex-a9-gic", .data = gic_of_init, },
+        { .compatible = "fsl,imx6q-gpio", .data = imx6q_gpio_add_irq_domain, },
+        { /* sentinel */ }
+};
+
+static void __init imx6q_init_irq(void)
+{
+        l2x0_of_init(0, ~0UL);
+        imx_src_init();
+        imx_gpc_init();
+        of_irq_init(imx6q_irq_match);
+}
+
+static void __init imx6q_timer_init(void)
+{
+        mx6q_clocks_init();
+}
+
+static struct sys_timer imx6q_timer = {
+        .init = imx6q_timer_init,
+};
+
+static const char *imx6q_dt_compat[] __initdata = {
+        "fsl,imx6q-sabreauto",
+        NULL,
+};
+
+DT_MACHINE_START(IMX6Q, "Freescale i.MX6 Quad (Device Tree)")
+        .map_io         = imx6q_map_io,
+        .init_irq       = imx6q_init_irq,
+        .handle_irq     = imx6q_handle_irq,
+        .timer          = &imx6q_timer,
+        .init_machine   = imx6q_init_machine,
+        .dt_compat      = imx6q_dt_compat,
+MACHINE_END