This patch adds a new Samsung's s5pv310 machine that boots with a minimal
device tree support. The bootargs, memory information, console port
register defaults and external crystal frequency are obtained from the
device tree during boot.
Signed-off-by: Thomas Abraham <thomas.abra...@linaro.org>
---
arch/arm/mach-s5pv310/Kconfig | 7 +++
arch/arm/mach-s5pv310/Makefile | 1 +
arch/arm/mach-s5pv310/mach-s5pv310-dt.c | 73 +++++++++++++++++++++++++++++++
3 files changed, 81 insertions(+), 0 deletions(-)
create mode 100644 arch/arm/mach-s5pv310/mach-s5pv310-dt.c
diff --git a/arch/arm/mach-s5pv310/Kconfig b/arch/arm/mach-s5pv310/Kconfig
index 09c4c21..f0c1afd 100644
--- a/arch/arm/mach-s5pv310/Kconfig
+++ b/arch/arm/mach-s5pv310/Kconfig
@@ -127,6 +127,13 @@ config MACH_SMDKV310
help
Machine support for Samsung SMDKV310
+config MACH_S5PV310_DT
+ bool "S5PV310 with device tree support"
+ select CPU_S5PV310
+ select USE_OF
+ help
+ Machine support for Samsung's S5PV310 SoC with device tree based
initialization.
+
endmenu
comment "Configuration for HSMMC bus width"
diff --git a/arch/arm/mach-s5pv310/Makefile b/arch/arm/mach-s5pv310/Makefile
index 036fb38..7fa7842 100644
--- a/arch/arm/mach-s5pv310/Makefile
+++ b/arch/arm/mach-s5pv310/Makefile
@@ -24,6 +24,7 @@ obj-$(CONFIG_HOTPLUG_CPU) += hotplug.o
obj-$(CONFIG_MACH_SMDKC210) += mach-smdkc210.o
obj-$(CONFIG_MACH_SMDKV310) += mach-smdkv310.o
+obj-$(CONFIG_MACH_S5PV310_DT) += mach-s5pv310-dt.o
obj-$(CONFIG_MACH_UNIVERSAL_C210) += mach-universal_c210.o
# device support
diff --git a/arch/arm/mach-s5pv310/mach-s5pv310-dt.c
b/arch/arm/mach-s5pv310/mach-s5pv310-dt.c
new file mode 100644
index 0000000..a5e33ff
--- /dev/null
+++ b/arch/arm/mach-s5pv310/mach-s5pv310-dt.c
@@ -0,0 +1,73 @@
+/*
+ * Samsung's S5PV310 machine with device tree enabled.
+ * Copyright (c) 2011 Samsung Electronics Co., Ltd.
+ * http://www.samsung.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/serial_core.h>
+#include <linux/gpio.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+#include <linux/of_platform.h>
+
+#include <asm/mach/arch.h>
+#include <asm/mach-types.h>
+
+#include <plat/regs-serial.h>
+#include <plat/s5pv310.h>
+#include <plat/cpu.h>
+#include <plat/devs.h>
+
+#include <mach/map.h>
+
+/*
+ * Platfrom data for uart devices. Some elements of the platform data will
+ * be set by the s5pv310 platform code and the rest will be obtained from the
+ * device tree. TODO: remove this when driver is able to obtain all the
+ * platform data information from the device tree.
+ */
+static struct s3c2410_uartcfg uartcfgs[CONFIG_SERIAL_SAMSUNG_UARTS] __initdata;
+
+static void __init s5pv310_dt_map_io(void)
+{
+ s5p_init_io(NULL, 0, S5P_VA_CHIPID);
+}
+
+static void s5pv310_dt_init_early(void)
+{
+ int i;
+ unsigned int *xtal_freq;
+
+ xtal_freq = (u32 *)of_get_property(of_chosen, "xtal-frequency", NULL);
+ if (!xtal_freq) {
+ printk(KERN_ERR "Ext crystal clock frequency not specified\n");
+ panic("Unknown external crystal clock frequency");
+ }
+
+ s3c24xx_init_clocks(be32_to_cpu(*xtal_freq));
+
+ for (i = 0; i < CONFIG_SERIAL_SAMSUNG_UARTS; i++) {
+ uartcfgs[i].hwport = i;
+ uartcfgs[i].flags = 0;
+ }
+ s3c24xx_init_uarts(uartcfgs, ARRAY_SIZE(uartcfgs));
+}
+
+static char const *s5pv310_dt_compat[] = {
+ "samsung,s5pv310",
+ NULL
+};
+
+MACHINE_START(S5PV310_DT, "Samsung's S5PV310 with flattened device tree")
+ /* Maintainer: Kukjin Kim <kgene....@samsung.com> */
+ /* Maintainer: Changhwan Youn <chaos.y...@samsung.com> */
+ .init_irq = s5pv310_init_irq,
+ .map_io = s5pv310_dt_map_io,
+ .timer = &s5pv310_timer,
+ .dt_compat = s5pv310_dt_compat,
+ .init_early = s5pv310_dt_init_early,
+MACHINE_END
--
1.6.6.rc2
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