mach-shmobile: Emma Mobile EV2 DT support V3

This is EMEV2 DT support V3. The support is limited to
whatever devices that are complied in the kernel. At this
point we have UARTs handled by "em-uart" and a timer
handled by "em-sti". Clocks and SMP are not supported.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>

1 files changed, 46 insertions, 1 deletions

diff --git a/arch/arm/mach-shmobile/setup-emev2.c b/arch/arm/mach-shmobile/setup-emev2.c
index d40fede8c9b3..dae9aa68bb09 100644
--- a/arch/arm/mach-shmobile/setup-emev2.c
+++ b/arch/arm/mach-shmobile/setup-emev2.c
@@ -22,9 +22,11 @@
 #include <linux/irq.h>
 #include <linux/platform_device.h>
 #include <linux/platform_data/gpio-em.h>
+#include <linux/of_platform.h>
 #include <linux/delay.h>
 #include <linux/input.h>
 #include <linux/io.h>
+#include <linux/of_irq.h>
 #include <mach/hardware.h>
 #include <mach/common.h>
 #include <mach/emev2.h>
@@ -381,9 +383,14 @@ void __init emev2_add_standard_devices(void)
                              ARRAY_SIZE(emev2_late_devices));
 }
 
-void __init emev2_add_early_devices(void)
+void __init emev2_init_delay(void)
 {
         shmobile_setup_delay(533, 1, 3); /* Cortex-A9 @ 533MHz */
+}
+
+void __init emev2_add_early_devices(void)
+{
+        emev2_init_delay();
 
         early_platform_add_devices(emev2_early_devices,
                                    ARRAY_SIZE(emev2_early_devices));
@@ -405,3 +412,41 @@ void __init emev2_init_irq(void)
         /* Use GIC to handle interrupts */
         gic_init(0, 29, gic_dist_base, gic_cpu_base);
 }
+
+#ifdef CONFIG_USE_OF
+static const struct of_dev_auxdata emev2_auxdata_lookup[] __initconst = {
+        { }
+};
+
+void __init emev2_add_standard_devices_dt(void)
+{
+        of_platform_populate(NULL, of_default_bus_match_table,
+                             emev2_auxdata_lookup, NULL);
+}
+
+static const struct of_device_id emev2_dt_irq_match[] = {
+        { .compatible = "arm,cortex-a9-gic", .data = gic_of_init, },
+        {},
+};
+
+static const char *emev2_boards_compat_dt[] __initdata = {
+        "renesas,emev2",
+        NULL,
+};
+
+void __init emev2_init_irq_dt(void)
+{
+        of_irq_init(emev2_dt_irq_match);
+}
+
+DT_MACHINE_START(EMEV2_DT, "Generic Emma Mobile EV2 (Flattened Device Tree)")
+        .init_early     = emev2_init_delay,
+        .nr_irqs        = NR_IRQS_LEGACY,
+        .init_irq       = emev2_init_irq_dt,
+        .handle_irq     = gic_handle_irq,
+        .init_machine   = emev2_add_standard_devices_dt,
+        .timer          = &shmobile_timer,
+        .dt_compat      = emev2_boards_compat_dt,
+MACHINE_END
+
+#endif /* CONFIG_USE_OF */