ARM i.MX35: Add devicetree support.

Cc: linux-arm-kernel@lists.infradead.org
Cc: Eric Bénard <eric@eukrea.com>
Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Denis Carikli <denis@eukrea.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

4 files changed, 73 insertions, 0 deletions

diff --git a/arch/arm/mach-imx/Kconfig b/arch/arm/mach-imx/Kconfig
index d511e054654..b0c6eb35a32 100644
--- a/arch/arm/mach-imx/Kconfig
+++ b/arch/arm/mach-imx/Kconfig
@@ -126,6 +126,7 @@ config SOC_IMX35
 	select HAVE_EPIT
 	select MXC_AVIC
 	select SMP_ON_UP if SMP
+	select PINCTRL
 
 config SOC_IMX5
 	bool
@@ -611,6 +612,13 @@ config MACH_IMX31_DT
 
 comment "MX35 platforms:"
 
+config MACH_IMX35_DT
+	bool "Support i.MX35 platforms from device tree"
+	select SOC_IMX35
+	help
+	  Include support for Freescale i.MX35 based platforms
+	  using the device tree for discovery.
+
 config MACH_PCM043
 	bool "Support Phytec pcm043 (i.MX35) platforms"
 	select IMX_HAVE_PLATFORM_FLEXCAN
diff --git a/arch/arm/mach-imx/Makefile b/arch/arm/mach-imx/Makefile
index 0db16972839..befcaf5d057 100644
--- a/arch/arm/mach-imx/Makefile
+++ b/arch/arm/mach-imx/Makefile
@@ -89,6 +89,7 @@ obj-$(CONFIG_MACH_MX35_3DS) += mach-mx35_3ds.o
 obj-$(CONFIG_MACH_EUKREA_CPUIMX35SD) += mach-cpuimx35.o
 obj-$(CONFIG_MACH_EUKREA_MBIMXSD35_BASEBOARD) += eukrea_mbimxsd35-baseboard.o
 obj-$(CONFIG_MACH_VPR200) += mach-vpr200.o
+obj-$(CONFIG_MACH_IMX35_DT) += imx35-dt.o
 
 obj-$(CONFIG_HAVE_IMX_ANATOP) += anatop.o
 obj-$(CONFIG_HAVE_IMX_GPC) += gpc.o
diff --git a/arch/arm/mach-imx/clk-imx35.c b/arch/arm/mach-imx/clk-imx35.c
index 2193c834f55..a4d5e425cd8 100644
--- a/arch/arm/mach-imx/clk-imx35.c
+++ b/arch/arm/mach-imx/clk-imx35.c
@@ -45,6 +45,8 @@ static struct arm_ahb_div clk_consumer[] = {
 static char hsp_div_532[] = { 4, 8, 3, 0 };
 static char hsp_div_400[] = { 3, 6, 3, 0 };
 
+static struct clk_onecell_data clk_data;
+
 static const char *std_sel[] = {"ppll", "arm"};
 static const char *ipg_per_sel[] = {"ahb_per_div", "arm_per_div"};
 
@@ -286,3 +288,15 @@ int __init mx35_clocks_init(void)
 
 	return 0;
 }
+
+static int __init mx35_clocks_init_dt(struct device_node *ccm_node)
+{
+	clk_data.clks = clk;
+	clk_data.clk_num = ARRAY_SIZE(clk);
+	of_clk_add_provider(ccm_node, of_clk_src_onecell_get, &clk_data);
+
+	mx35_clocks_init();
+
+	return 0;
+}
+CLK_OF_DECLARE(imx35, "fsl,imx35-ccm", mx35_clocks_init_dt);
diff --git a/arch/arm/mach-imx/imx35-dt.c b/arch/arm/mach-imx/imx35-dt.c
new file mode 100644
index 00000000000..9d48e0065a6
--- /dev/null
+++ b/arch/arm/mach-imx/imx35-dt.c
@@ -0,0 +1,50 @@
+/*
+ * Copyright 2012 Steffen Trumtrar, Pengutronix
+ *
+ * based on imx27-dt.c
+ *
+ * This program is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License version 2 as published by the
+ * Free Software Foundation.
+ */
+
+#include <linux/irq.h>
+#include <linux/irqdomain.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+#include <linux/clk-provider.h>
+#include <linux/clocksource.h>
+#include <asm/mach/arch.h>
+#include <asm/mach/time.h>
+#include <asm/hardware/cache-l2x0.h>
+#include "common.h"
+#include "mx35.h"
+
+static void __init imx35_dt_init(void)
+{
+	mxc_arch_reset_init_dt();
+
+	of_platform_populate(NULL, of_default_bus_match_table,
+			     NULL, NULL);
+}
+
+static void __init imx35_irq_init(void)
+{
+	imx_init_l2cache();
+	mx35_init_irq();
+}
+
+static const char *imx35_dt_board_compat[] __initconst = {
+	"fsl,imx35",
+	NULL
+};
+
+DT_MACHINE_START(IMX35_DT, "Freescale i.MX35 (Device Tree Support)")
+	.map_io		= mx35_map_io,
+	.init_early	= imx35_init_early,
+	.init_irq	= imx35_irq_init,
+	.handle_irq	= imx35_handle_irq,
+	.init_machine	= imx35_dt_init,
+	.dt_compat	= imx35_dt_board_compat,
+	.restart	= mxc_restart,
+MACHINE_END