[PATCH v3] ARM: shmobile: lager: Add DT reference
Simon Horman
horms+renesas at verge.net.au
Wed Jul 3 03:57:31 EDT 2013
This is sufficient to allow boot of the Lager board with
a console without boards-lager.c compiled into the kernel.
This is an example of a minimal but still useful initialisation
of the board using DT as much as possible.
As such it is the same as the boot of Lager that can be achieved
without a board file. The intention of adding this file
is to facilitate further work to allow board specific devices to be
initialised via DT.
Signed-off-by: Simon Horman <horms+renesas at verge.net.au>
---
v3
* Supply temporary machine_init call-back in lager-reference.c to
initialise clocks and bring up SCIF and CMT in C. Magnus
advised me that this is not desired in the SoC code.
* Add lager-reference to Makefile.boot
v2
* Use recently added r8a7790_init_delay()
---
arch/arm/boot/dts/Makefile | 1 +
arch/arm/boot/dts/r8a7790-lager-reference.dts | 31 +++++++++++++++++
arch/arm/mach-shmobile/Kconfig | 11 ++++++
arch/arm/mach-shmobile/Makefile | 1 +
arch/arm/mach-shmobile/Makefile.boot | 1 +
arch/arm/mach-shmobile/board-lager-reference.c | 46 ++++++++++++++++++++++++++
arch/arm/mach-shmobile/include/mach/r8a7790.h | 1 +
arch/arm/mach-shmobile/setup-r8a7790.c | 9 +++--
8 files changed, 99 insertions(+), 2 deletions(-)
create mode 100644 arch/arm/boot/dts/r8a7790-lager-reference.dts
create mode 100644 arch/arm/mach-shmobile/board-lager-reference.c
diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
index cb31259..f2dc697 100644
--- a/arch/arm/boot/dts/Makefile
+++ b/arch/arm/boot/dts/Makefile
@@ -165,6 +165,7 @@ dtb-$(CONFIG_ARCH_SHMOBILE) += emev2-kzm9d.dtb \
r8a7740-armadillo800eva-reference.dtb \
r8a7779-marzen-reference.dtb \
r8a7790-lager.dtb \
+ r8a7790-lager-reference.dtb \
sh73a0-kzm9g.dtb \
sh73a0-kzm9g-reference.dtb \
r8a73a4-ape6evm.dtb \
diff --git a/arch/arm/boot/dts/r8a7790-lager-reference.dts b/arch/arm/boot/dts/r8a7790-lager-reference.dts
new file mode 100644
index 0000000..fa5b81b
--- /dev/null
+++ b/arch/arm/boot/dts/r8a7790-lager-reference.dts
@@ -0,0 +1,31 @@
+/*
+ * Device Tree Source for the Lager board
+ *
+ * Copyright (C) 2013 Renesas Solutions Corp.
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ */
+
+/dts-v1/;
+/include/ "r8a7790.dtsi"
+
+/ {
+ model = "Lager";
+ compatible = "renesas,lager-reference", "renesas,r8a7790";
+
+ chosen {
+ bootargs = "console=ttySC6,115200 ignore_loglevel";
+ };
+
+ memory at 40000000 {
+ device_type = "memory";
+ reg = <0 0x40000000 0 0x80000000>;
+ };
+
+ lbsc {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ };
+};
diff --git a/arch/arm/mach-shmobile/Kconfig b/arch/arm/mach-shmobile/Kconfig
index 64dc24d..30c571b 100644
--- a/arch/arm/mach-shmobile/Kconfig
+++ b/arch/arm/mach-shmobile/Kconfig
@@ -150,6 +150,17 @@ config MACH_LAGER
depends on ARCH_R8A7790
select USE_OF
+config MACH_LAGER_REFERENCE
+ bool "Lager board - Reference Device Tree Implementation"
+ depends on ARCH_R8A7790
+ select USE_OF
+ ---help---
+ Use reference implementation of Lager board support
+ which makes use of device tree at the expense
+ of not supporting a number of devices.
+
+ This is intended to aid developers
+
config MACH_KZM9D
bool "KZM9D board"
depends on ARCH_EMEV2
diff --git a/arch/arm/mach-shmobile/Makefile b/arch/arm/mach-shmobile/Makefile
index 6165a51..d813133 100644
--- a/arch/arm/mach-shmobile/Makefile
+++ b/arch/arm/mach-shmobile/Makefile
@@ -43,6 +43,7 @@ obj-$(CONFIG_MACH_BOCKW) += board-bockw.o
obj-$(CONFIG_MACH_MARZEN) += board-marzen.o
obj-$(CONFIG_MACH_MARZEN_REFERENCE) += board-marzen-reference.o
obj-$(CONFIG_MACH_LAGER) += board-lager.o
+obj-$(CONFIG_MACH_LAGER_REFERENCE) += board-lager-reference.o
obj-$(CONFIG_MACH_ARMADILLO800EVA) += board-armadillo800eva.o
obj-$(CONFIG_MACH_ARMADILLO800EVA_REFERENCE) += board-armadillo800eva-reference.o
obj-$(CONFIG_MACH_KZM9D) += board-kzm9d.o
diff --git a/arch/arm/mach-shmobile/Makefile.boot b/arch/arm/mach-shmobile/Makefile.boot
index 84c6868..16834d8 100644
--- a/arch/arm/mach-shmobile/Makefile.boot
+++ b/arch/arm/mach-shmobile/Makefile.boot
@@ -10,6 +10,7 @@ loadaddr-$(CONFIG_MACH_KZM9D) += 0x40008000
loadaddr-$(CONFIG_MACH_KZM9G) += 0x41008000
loadaddr-$(CONFIG_MACH_KZM9G_REFERENCE) += 0x41008000
loadaddr-$(CONFIG_MACH_LAGER) += 0x40008000
+loadaddr-$(CONFIG_MACH_LAGER_REFERENCE) += 0x40008000
loadaddr-$(CONFIG_MACH_MACKEREL) += 0x40008000
loadaddr-$(CONFIG_MACH_MARZEN) += 0x60008000
loadaddr-$(CONFIG_MACH_MARZEN_REFERENCE) += 0x60008000
diff --git a/arch/arm/mach-shmobile/board-lager-reference.c b/arch/arm/mach-shmobile/board-lager-reference.c
new file mode 100644
index 0000000..eb6c55e
--- /dev/null
+++ b/arch/arm/mach-shmobile/board-lager-reference.c
@@ -0,0 +1,46 @@
+/*
+ * Lager board support - Reference DT implementation
+ *
+ * Copyright (C) 2013 Renesas Solutions Corp.
+ * Copyright (C) 2013 Simon Horman
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <linux/init.h>
+#include <linux/irqchip.h>
+#include <linux/of_platform.h>
+#include <mach/r8a7790.h>
+#include <asm/mach/arch.h>
+
+void __init lager_add_standard_devices(void)
+{
+ /* clocks are setup late during boot in the case of DT */
+ r8a7790_clock_init();
+
+ r8a7790_add_dt_devices();
+ of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
+}
+
+static const char *lager_boards_compat_dt[] __initdata = {
+ "renesas,lager-reference",
+ NULL,
+};
+
+DT_MACHINE_START(LAGER_DT, "lager")
+ .init_early = r8a7790_init_delay,
+ .init_machine = lager_add_standard_devices,
+ .init_time = r8a7790_timer_init,
+ .dt_compat = lager_boards_compat_dt,
+MACHINE_END
diff --git a/arch/arm/mach-shmobile/include/mach/r8a7790.h b/arch/arm/mach-shmobile/include/mach/r8a7790.h
index 7851cc1..421d842 100644
--- a/arch/arm/mach-shmobile/include/mach/r8a7790.h
+++ b/arch/arm/mach-shmobile/include/mach/r8a7790.h
@@ -2,6 +2,7 @@
#define __ASM_R8A7790_H__
void r8a7790_add_standard_devices(void);
+void r8a7790_add_dt_devices(void);
void r8a7790_clock_init(void);
void r8a7790_pinmux_init(void);
void r8a7790_init_delay(void);
diff --git a/arch/arm/mach-shmobile/setup-r8a7790.c b/arch/arm/mach-shmobile/setup-r8a7790.c
index f01542e..7f01178 100644
--- a/arch/arm/mach-shmobile/setup-r8a7790.c
+++ b/arch/arm/mach-shmobile/setup-r8a7790.c
@@ -179,7 +179,7 @@ static struct resource cmt00_resources[] = {
&cmt##idx##_platform_data, \
sizeof(struct sh_timer_config))
-void __init r8a7790_add_standard_devices(void)
+void __init r8a7790_add_dt_devices(void)
{
r8a7790_register_scif(SCIFA0);
r8a7790_register_scif(SCIFA1);
@@ -191,9 +191,14 @@ void __init r8a7790_add_standard_devices(void)
r8a7790_register_scif(SCIF1);
r8a7790_register_scif(HSCIF0);
r8a7790_register_scif(HSCIF1);
+ r8a7790_register_cmt(00);
+}
+
+void __init r8a7790_add_standard_devices(void)
+{
+ r8a7790_add_dt_devices();
r8a7790_register_irqc(0);
r8a7790_register_thermal();
- r8a7790_register_cmt(00);
}
void __init r8a7790_timer_init(void)
--
1.8.2.1
More information about the linux-arm-kernel
mailing list