ARM: SAMSUNG: Move Samsung PM debug code into separate file

Not all Samsung SoC platforms are going to use the legacy Samsung PM
code enabled by CONFIG_SAMSUNG_PM_DEBUG. To allow using Samsung PM debug
helpers on such platforms, related code is moved to separate file and
a plat/pm-common.h header is added to separate legacy and generic code.

Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

1 files changed, 70 insertions, 0 deletions

diff --git a/arch/arm/plat-samsung/include/plat/pm-common.h b/arch/arm/plat-samsung/include/plat/pm-common.h
new file mode 100644
index 000000000000..f72974a762bf
--- /dev/null
+++ b/arch/arm/plat-samsung/include/plat/pm-common.h
@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) 2013 Samsung Electronics Co., Ltd.
+ *	Tomasz Figa <t.figa@samsung.com>
+ * Copyright (c) 2004 Simtec Electronics
+ *	http://armlinux.simtec.co.uk/
+ *	Written by Ben Dooks, <ben@simtec.co.uk>
+ *
+ * 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.
+*/
+
+#ifndef __PLAT_SAMSUNG_PM_COMMON_H
+#define __PLAT_SAMSUNG_PM_COMMON_H __FILE__
+
+/* PM debug functions */
+
+/**
+ * struct pm_uart_save - save block for core UART
+ * @ulcon: Save value for S3C2410_ULCON
+ * @ucon: Save value for S3C2410_UCON
+ * @ufcon: Save value for S3C2410_UFCON
+ * @umcon: Save value for S3C2410_UMCON
+ * @ubrdiv: Save value for S3C2410_UBRDIV
+ *
+ * Save block for UART registers to be held over sleep and restored if they
+ * are needed (say by debug).
+*/
+struct pm_uart_save {
+	u32	ulcon;
+	u32	ucon;
+	u32	ufcon;
+	u32	umcon;
+	u32	ubrdiv;
+	u32	udivslot;
+};
+
+#ifdef CONFIG_SAMSUNG_PM_DEBUG
+/**
+ * s3c_pm_dbg() - low level debug function for use in suspend/resume.
+ * @msg: The message to print.
+ *
+ * This function is used mainly to debug the resume process before the system
+ * can rely on printk/console output. It uses the low-level debugging output
+ * routine printascii() to do its work.
+ */
+extern void s3c_pm_dbg(const char *msg, ...);
+
+/**
+ * s3c_pm_debug_init() - suspend/resume low level debug initialization.
+ * @base: Virtual base of UART to use for suspend/resume debugging.
+ *
+ * This function needs to be called before S3C_PMDBG() can be used, to set up
+ * UART port base address and configuration.
+ */
+extern void s3c_pm_debug_init(void);
+
+#define S3C_PMDBG(fmt...) s3c_pm_dbg(fmt)
+
+extern void s3c_pm_save_uarts(void);
+extern void s3c_pm_restore_uarts(void);
+#else
+#define S3C_PMDBG(fmt...) pr_debug(fmt)
+#define s3c_pm_debug_init() do { } while (0)
+
+static inline void s3c_pm_save_uarts(void) { }
+static inline void s3c_pm_restore_uarts(void) { }
+#endif
+
+#endif