dm: define dev_*() log functions in DM header

Many drivers had started to use dev_err, dev_info, etc. for log
functions.  Currently, we are relying on <linux/compat.h>, but I
guess the best home is <dm/device.h>, taking into account that
Linux defines them in <linux/device.h>.

For now, I am leaving the ones in <linux/compat.h> because lots of
Linux-originated code uses dev_*(), but the first argument is not
struct udevice, so we need to ignore the bogus argument.  More
efforts are needed to iron out the issues.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

include/dm/device.h

@@ -18,6 +18,7 @@
 #include <linux/compat.h>
 #include <linux/kernel.h>
 #include <linux/list.h>
+#include <linux/printk.h>
 
 struct driver_info;
 
@@ -879,4 +880,75 @@ static inline void devm_kfree(struct udevice *dev, void *ptr)
 
 #endif /* ! CONFIG_DEVRES */
 
+/*
+ * REVISIT:
+ * remove the following after resolving conflicts with <linux/compat.h>
+ */
+#ifdef dev_dbg
+#undef dev_dbg
+#endif
+#ifdef dev_vdbg
+#undef dev_vdbg
+#endif
+#ifdef dev_info
+#undef dev_info
+#endif
+#ifdef dev_err
+#undef dev_err
+#endif
+#ifdef dev_warn
+#undef dev_warn
+#endif
+
+/*
+ * REVISIT:
+ * print device name like Linux
+ */
+#define dev_printk(dev, fmt, ...)				\
+({								\
+	printk(fmt, ##__VA_ARGS__);				\
+})
+
+#define __dev_printk(level, dev, fmt, ...)			\
+({								\
+	if (level < CONFIG_VAL(LOGLEVEL))			\
+		dev_printk(dev, fmt, ##__VA_ARGS__);		\
+})
+
+#define dev_emerg(dev, fmt, ...) \
+	__dev_printk(0, dev, fmt, ##__VA_ARGS__)
+#define dev_alert(dev, fmt, ...) \
+	__dev_printk(1, dev, fmt, ##__VA_ARGS__)
+#define dev_crit(dev, fmt, ...) \
+	__dev_printk(2, dev, fmt, ##__VA_ARGS__)
+#define dev_err(dev, fmt, ...) \
+	__dev_printk(3, dev, fmt, ##__VA_ARGS__)
+#define dev_warn(dev, fmt, ...) \
+	__dev_printk(4, dev, fmt, ##__VA_ARGS__)
+#define dev_notice(dev, fmt, ...) \
+	__dev_printk(5, dev, fmt, ##__VA_ARGS__)
+#define dev_info(dev, fmt, ...) \
+	__dev_printk(6, dev, fmt, ##__VA_ARGS__)
+
+#ifdef DEBUG
+#define dev_dbg(dev, fmt, ...) \
+	__dev_printk(7, dev, fmt, ##__VA_ARGS__)
+#else
+#define dev_dbg(dev, fmt, ...)					\
+({								\
+	if (0)							\
+		__dev_printk(7, dev, fmt, ##__VA_ARGS__);	\
+})
+#endif
+
+#ifdef VERBOSE_DEBUG
+#define dev_vdbg	dev_dbg
+#else
+#define dev_vdbg(dev, fmt, ...)					\
+({								\
+	if (0)							\
+		__dev_printk(7, dev, fmt, ##__VA_ARGS__);	\
+})
+#endif
+
 #endif

include/linux/compat.h

@@ -15,6 +15,23 @@ struct p_current{
 
 extern struct p_current *current;
 
+/* avoid conflict with <dm/device.h> */
+#ifdef dev_dbg
+#undef dev_dbg
+#endif
+#ifdef dev_vdbg
+#undef dev_vdbg
+#endif
+#ifdef dev_info
+#undef dev_info
+#endif
+#ifdef dev_err
+#undef dev_err
+#endif
+#ifdef dev_warn
+#undef dev_warn
+#endif
+
 #define dev_dbg(dev, fmt, args...)		\
 	debug(fmt, ##args)
 #define dev_vdbg(dev, fmt, args...)		\