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authorAbhilash Kesavan <a.kesavan@samsung.com>2011-10-04 20:25:51 +0900
committerKukjin Kim <kgene.kim@samsung.com>2011-10-04 20:25:51 +0900
commite2e13621b267f88f69917780e107725d2c0ecad9 (patch)
tree0e2a13a08fd4deda46c19d0c8716ba7ffbd301c1 /arch/arm/plat-s5p
parent0da3beadcbed2128702831c9fe106ea23e194b3f (diff)
ARM: S5P: Make the sleep code common for S5P series SoCs
The sleep code for S5PV210 and EXYNOS4 are identical; moreover S5p64X0 and S5PC100 for which support will be added soon can use the same procedure. Create a common sleep code in the plat-s5p directory so that it can be re-used. Signed-off-by: Abhilash Kesavan <a.kesavan@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Diffstat (limited to 'arch/arm/plat-s5p')
-rw-r--r--arch/arm/plat-s5p/Kconfig6
-rw-r--r--arch/arm/plat-s5p/Makefile1
-rw-r--r--arch/arm/plat-s5p/sleep.S49
3 files changed, 56 insertions, 0 deletions
diff --git a/arch/arm/plat-s5p/Kconfig b/arch/arm/plat-s5p/Kconfig
index 53e674348b3..7b9dadadb0a 100644
--- a/arch/arm/plat-s5p/Kconfig
+++ b/arch/arm/plat-s5p/Kconfig
@@ -54,6 +54,12 @@ config S5P_SYSTEM_MMU
help
Say Y here if you want to enable System MMU
+config S5P_SLEEP
+ bool
+ help
+ Internal config node to apply common S5P sleep management code.
+ Can be selected by S5P and newer SoCs with similar sleep procedure.
+
config S5P_DEV_FIMC0
bool
help
diff --git a/arch/arm/plat-s5p/Makefile b/arch/arm/plat-s5p/Makefile
index 755d7ac4384..06401dc37b8 100644
--- a/arch/arm/plat-s5p/Makefile
+++ b/arch/arm/plat-s5p/Makefile
@@ -21,6 +21,7 @@ obj-$(CONFIG_S5P_EXT_INT) += irq-eint.o
obj-$(CONFIG_S5P_GPIO_INT) += irq-gpioint.o
obj-$(CONFIG_S5P_SYSTEM_MMU) += sysmmu.o
obj-$(CONFIG_S5P_PM) += pm.o irq-pm.o
+obj-$(CONFIG_S5P_SLEEP) += sleep.o
obj-$(CONFIG_S5P_HRT) += s5p-time.o
# devices
diff --git a/arch/arm/plat-s5p/sleep.S b/arch/arm/plat-s5p/sleep.S
new file mode 100644
index 00000000000..0fd591bfc9f
--- /dev/null
+++ b/arch/arm/plat-s5p/sleep.S
@@ -0,0 +1,49 @@
+/* linux/arch/arm/plat-s5p/sleep.S
+ *
+ * Copyright (c) 2011 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com
+ *
+ * Common S5P Sleep Code
+ * Based on S3C64XX sleep code by:
+ * Ben Dooks, (c) 2008 Simtec Electronics
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+*/
+
+#include <linux/linkage.h>
+#include <asm/assembler.h>
+
+ .text
+
+ /*
+ * sleep magic, to allow the bootloader to check for an valid
+ * image to resume to. Must be the first word before the
+ * s3c_cpu_resume entry.
+ */
+
+ .word 0x2bedf00d
+
+ /*
+ * s3c_cpu_resume
+ *
+ * resume code entry for bootloader to call
+ *
+ * we must put this code here in the data segment as we have no
+ * other way of restoring the stack pointer after sleep, and we
+ * must not write to the code segment (code is read-only)
+ */
+
+ENTRY(s3c_cpu_resume)
+ b cpu_resume