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>

arch/arm/boot/dts/emev2.dtsi

@@ -0,0 +1,63 @@
+/*
+ * Device Tree Source for the EMEV2 SoC
+ *
+ * Copyright (C) 2012 Renesas Solutions Corp.
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2.  This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ */
+
+/include/ "skeleton.dtsi"
+
+/ {
+	compatible = "renesas,emev2";
+	interrupt-parent = <&gic>;
+
+	cpus {
+		cpu@0 {
+			compatible = "arm,cortex-a9";
+		};
+		cpu@1 {
+			compatible = "arm,cortex-a9";
+		};
+	};
+
+	gic: interrupt-controller@e0020000 {
+		compatible = "arm,cortex-a9-gic";
+		interrupt-controller;
+		#interrupt-cells = <3>;
+		reg = <0xe0028000 0x1000>,
+		      <0xe0020000 0x0100>;
+	};
+
+	sti@e0180000 {
+		compatible = "renesas,em-sti";
+		reg = <0xe0180000 0x54>;
+		interrupts = <0 125 0>;
+	};
+
+	uart@e1020000 {
+		compatible = "renesas,em-uart";
+		reg = <0xe1020000 0x38>;
+		interrupts = <0 8 0>;
+	};
+
+	uart@e1030000 {
+		compatible = "renesas,em-uart";
+		reg = <0xe1030000 0x38>;
+		interrupts = <0 9 0>;
+	};
+
+	uart@e1040000 {
+		compatible = "renesas,em-uart";
+		reg = <0xe1040000 0x38>;
+		interrupts = <0 10 0>;
+	};
+
+	uart@e1050000 {
+		compatible = "renesas,em-uart";
+		reg = <0xe1050000 0x38>;
+		interrupts = <0 11 0>;
+	};
+};

arch/arm/mach-shmobile/clock-emev2.c

@@ -191,10 +191,15 @@ static int __init emev2_sclkdiv_register(struct clk *clks, int nr)
 
 static struct clk_lookup lookups[] = {
 	CLKDEV_DEV_ID("serial8250-em.0", &gclk_clks[GCLK_USIAU0_SCLK]),
+	CLKDEV_DEV_ID("e1020000.uart", &gclk_clks[GCLK_USIAU0_SCLK]),
 	CLKDEV_DEV_ID("serial8250-em.1", &gclk_clks[GCLK_USIBU1_SCLK]),
+	CLKDEV_DEV_ID("e1030000.uart", &gclk_clks[GCLK_USIBU1_SCLK]),
 	CLKDEV_DEV_ID("serial8250-em.2", &gclk_clks[GCLK_USIBU2_SCLK]),
+	CLKDEV_DEV_ID("e1040000.uart", &gclk_clks[GCLK_USIBU2_SCLK]),
 	CLKDEV_DEV_ID("serial8250-em.3", &gclk_clks[GCLK_USIBU3_SCLK]),
+	CLKDEV_DEV_ID("e1050000.uart", &gclk_clks[GCLK_USIBU3_SCLK]),
 	CLKDEV_DEV_ID("em_sti.0", &gclk_clks[GCLK_STI_SCLK]),
+	CLKDEV_DEV_ID("e0180000.sti", &gclk_clks[GCLK_STI_SCLK]),
 };
 
 void __init emev2_clock_init(void)

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 */