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Message-ID: <2302304.NyG5fka8vK@flatron>
Date: Sat, 22 Jun 2013 15:44:07 +0200
From: Tomasz Figa <tomasz.figa@...il.com>
To: linux-samsung-soc@...r.kernel.org
Cc: linux-arm-kernel@...ts.infradead.org,
Kukjin Kim <kgene.kim@...sung.com>,
Arnd Bergmann <arnd@...db.de>, Olof Johansson <olof@...om.net>,
Mark Brown <broonie@...nel.org>,
Rob Herring <rob.herring@...xeda.com>,
Grant Likely <grant.likely@...aro.org>,
Benoit Cousson <benoit.cousson@...aro.org>,
devicetree-discuss@...ts.ozlabs.org,
Jason Cooper <jason@...edaemon.net>,
linux-kernel@...r.kernel.org, Marc Zyngier <marc.zyngier@....com>,
Nicolas Pitre <nico@...xnic.net>,
Russell King <linux@....linux.org.uk>,
Stephen Warren <swarren@...dotorg.org>,
Thomas Gleixner <tglx@...utronix.de>,
Will Deacon <will.deacon@....com>
Subject: [PATCH v7 5/8] ARM: s3c64xx: Add board file for boot using Device Tree
This patch adds board file that will be used to boot S3C64xx-based boards
using Device Tree.
Signed-off-by: Tomasz Figa <tomasz.figa@...il.com>
---
arch/arm/mach-s3c64xx/Kconfig | 16 +++++++
arch/arm/mach-s3c64xx/Makefile | 1 +
arch/arm/mach-s3c64xx/mach-s3c64xx-dt.c | 85 +++++++++++++++++++++++++++++++++
3 files changed, 102 insertions(+)
create mode 100644 arch/arm/mach-s3c64xx/mach-s3c64xx-dt.c
Changes since v6:
- Dropped the concept of .init_platform() callback and returned back
to the old good abuse of .init_irq().
diff --git a/arch/arm/mach-s3c64xx/Kconfig b/arch/arm/mach-s3c64xx/Kconfig
index f78a6a0..fb4258c 100644
--- a/arch/arm/mach-s3c64xx/Kconfig
+++ b/arch/arm/mach-s3c64xx/Kconfig
@@ -308,3 +308,19 @@ config MACH_WLF_CRAGG_6410
select SAMSUNG_GPIO_EXTRA128
help
Machine support for the Wolfson Cragganmore S3C6410 variant.
+
+config MACH_S3C64XX_DT
+ bool "Samsung S3C6400/S3C6410 machine using Device Tree"
+ select CLKSRC_OF
+ select CPU_S3C6400
+ select CPU_S3C6410
+ select PINCTRL
+ select PINCTRL_S3C64XX
+ select USE_OF
+ help
+ Machine support for Samsung S3C6400/S3C6410 machines with Device Tree
+ enabled.
+ Select this if a fdt blob is available for your S3C64XX SoC based
+ board.
+ Note: This is under development and not all peripherals can be
+ supported with this machine file.
diff --git a/arch/arm/mach-s3c64xx/Makefile b/arch/arm/mach-s3c64xx/Makefile
index 645a8fe..6faedcf 100644
--- a/arch/arm/mach-s3c64xx/Makefile
+++ b/arch/arm/mach-s3c64xx/Makefile
@@ -57,3 +57,4 @@ obj-$(CONFIG_MACH_SMARTQ7) += mach-smartq7.o
obj-$(CONFIG_MACH_SMDK6400) += mach-smdk6400.o
obj-$(CONFIG_MACH_SMDK6410) += mach-smdk6410.o
obj-$(CONFIG_MACH_WLF_CRAGG_6410) += mach-crag6410.o mach-crag6410-module.o
+obj-$(CONFIG_MACH_S3C64XX_DT) += mach-s3c64xx-dt.o
diff --git a/arch/arm/mach-s3c64xx/mach-s3c64xx-dt.c b/arch/arm/mach-s3c64xx/mach-s3c64xx-dt.c
new file mode 100644
index 0000000..3384cb0
--- /dev/null
+++ b/arch/arm/mach-s3c64xx/mach-s3c64xx-dt.c
@@ -0,0 +1,85 @@
+/*
+ * Samsung's S3C64XX flattened device tree enabled machine
+ *
+ * Copyright (c) 2013 Tomasz Figa <tomasz.figa@...il.com>
+ *
+ * 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/clk-provider.h>
+#include <linux/irqchip.h>
+#include <linux/of_platform.h>
+
+#include <asm/mach/arch.h>
+#include <asm/mach/map.h>
+#include <asm/system_misc.h>
+
+#include <plat/cpu.h>
+#include <plat/watchdog-reset.h>
+
+#include <mach/map.h>
+
+#include "common.h"
+
+/*
+ * IO mapping for shared system controller IP.
+ *
+ * FIXME: Make remaining drivers use dynamic mapping.
+ */
+static struct map_desc s3c64xx_dt_iodesc[] __initdata = {
+ {
+ .virtual = (unsigned long)S3C_VA_SYS,
+ .pfn = __phys_to_pfn(S3C64XX_PA_SYSCON),
+ .length = SZ_4K,
+ .type = MT_DEVICE,
+ },
+};
+
+static void __init s3c64xx_dt_map_io(void)
+{
+ debug_ll_io_init();
+ iotable_init(s3c64xx_dt_iodesc, ARRAY_SIZE(s3c64xx_dt_iodesc));
+
+ s3c64xx_init_cpu();
+
+ if (!soc_is_s3c64xx())
+ panic("SoC is not S3C64xx!");
+}
+
+static void __init s3c64xx_dt_init_irq(void)
+{
+ of_clk_init(NULL);
+ samsung_wdt_reset_of_init();
+ irqchip_init();
+};
+
+static void __init s3c64xx_dt_init_machine(void)
+{
+ of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
+}
+
+static void s3c64xx_dt_restart(char mode, const char *cmd)
+{
+ if (mode != 's')
+ samsung_wdt_reset();
+
+ /* if all else fails, or mode was for soft, jump to 0 */
+ soft_restart(0);
+}
+
+static char const *s3c64xx_dt_compat[] __initdata = {
+ "samsung,s3c6400",
+ "samsung,s3c6410",
+ NULL
+};
+
+DT_MACHINE_START(S3C6400_DT, "Samsung S3C64xx (Flattened Device Tree)")
+ /* Maintainer: Tomasz Figa <tomasz.figa@...il.com> */
+ .dt_compat = s3c64xx_dt_compat,
+ .map_io = s3c64xx_dt_map_io,
+ .init_irq = s3c64xx_dt_init_irq,
+ .init_machine = s3c64xx_dt_init_machine,
+ .restart = s3c64xx_dt_restart,
+MACHINE_END
--
1.8.2.1
--
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