ACPI: AC: Clean up printing messages

Replace the ACPI_DEBUG_PRINT() and ACPI_EXCEPTION() instances
in ac.c with acpi_handle_debug() and acpi_handle_info() calls,
respectively, which among other things causes the excessive log
level of the messages previously printed via ACPI_EXCEPTION() to
be increased.

Drop the _COMPONENT and ACPI_MODULE_NAME() definitions that are not
used any more, drop the no longer needed ACPI_AC_COMPONENT definition
from the headers and update the documentation accordingly.

While at it, replace the direct printk() invocation with pr_info(),
add a pr_fmt() definition to ac.c and drop the unneeded PREFIX
symbol definition from there.

Signed-off-by: Rafael J. Wysocki <[e-mail]>
Reviewed-by: Hanjun Guo <[e-mail]>
Reviewed-by: Hans de Goede <[e-mail]>

Documentation/firmware-guide/acpi/debug.rst

···
     ACPI_CA_DISASSEMBLER            0x00000800
     ACPI_COMPILER                   0x00001000
     ACPI_TOOLS                      0x00002000
-    ACPI_AC_COMPONENT               0x00020000
     ACPI_BATTERY_COMPONENT          0x00040000
     ACPI_BUTTON_COMPONENT           0x00080000
     ACPI_SBS_COMPONENT              0x00100000

drivers/acpi/ac.c

···
  *  Copyright (C) 2001, 2002 Paul Diefenbaugh <[e-mail]>
  */
 
+#define pr_fmt(fmt) "ACPI: AC: " fmt
+
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/slab.h>
···
 #include <linux/acpi.h>
 #include <acpi/battery.h>
 
-#define PREFIX "ACPI: "
-
 #define ACPI_AC_CLASS			"ac_adapter"
 #define ACPI_AC_DEVICE_NAME		"AC Adapter"
 #define ACPI_AC_FILE_STATE		"state"
···
 #define ACPI_AC_STATUS_OFFLINE		0x00
 #define ACPI_AC_STATUS_ONLINE		0x01
 #define ACPI_AC_STATUS_UNKNOWN		0xFF
-
-#define _COMPONENT		ACPI_AC_COMPONENT
-ACPI_MODULE_NAME("ac");
 
 MODULE_AUTHOR("Paul Diefenbaugh");
 MODULE_DESCRIPTION("ACPI AC Adapter Driver");
···
 	status = acpi_evaluate_integer(ac->device->handle, "_PSR", NULL,
 				       &ac->state);
 	if (ACPI_FAILURE(status)) {
-		ACPI_EXCEPTION((AE_INFO, status,
-				"Error reading AC Adapter state"));
+		acpi_handle_info(ac->device->handle,
+				"Error reading AC Adapter state: %s\n",
+				acpi_format_exception(status));
 		ac->state = ACPI_AC_STATUS_UNKNOWN;
 		return -ENODEV;
 	}
···
 
 	switch (event) {
 	default:
-		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
-				  "Unsupported event [0x%x]\n", event));
+		acpi_handle_debug(device->handle, "Unsupported event [0x%x]\n",
+				  event);
 		fallthrough;
 	case ACPI_AC_NOTIFY_STATUS:
 	case ACPI_NOTIFY_BUS_CHECK:
···
 		goto end;
 	}
 
-	printk(KERN_INFO PREFIX "%s [%s] (%s)\n",
-	       acpi_device_name(device), acpi_device_bid(device),
-	       ac->state ? "on-line" : "off-line");
+	pr_info("%s [%s] (%s)\n", acpi_device_name(device),
+		acpi_device_bid(device), ac->state ? "on-line" : "off-line");
 
 	ac->battery_nb.notifier_call = acpi_ac_battery_notify;
 	register_acpi_notifier(&ac->battery_nb);
···
 		for (i = 0; i < ARRAY_SIZE(acpi_ac_blacklist); i++)
 			if (acpi_dev_present(acpi_ac_blacklist[i].hid, "1",
 					     acpi_ac_blacklist[i].hrv)) {
-				pr_info(PREFIX "AC: found native %s PMIC, not loading\n",
+				pr_info("found native %s PMIC, not loading\n",
 					acpi_ac_blacklist[i].hid);
 				return -ENODEV;
 			}

drivers/acpi/sysfs.c

···
 	ACPI_DEBUG_INIT(ACPI_COMPILER),
 	ACPI_DEBUG_INIT(ACPI_TOOLS),
 
-	ACPI_DEBUG_INIT(ACPI_AC_COMPONENT),
 	ACPI_DEBUG_INIT(ACPI_BATTERY_COMPONENT),
 	ACPI_DEBUG_INIT(ACPI_BUTTON_COMPONENT),
 	ACPI_DEBUG_INIT(ACPI_SBS_COMPONENT),

include/acpi/acpi_drivers.h

···
  * Please update drivers/acpi/debug.c and Documentation/firmware-guide/acpi/debug.rst
  * if you add to this list.
  */
-#define ACPI_AC_COMPONENT		0x00020000
 #define ACPI_BATTERY_COMPONENT		0x00040000
 #define ACPI_BUTTON_COMPONENT		0x00080000
 #define ACPI_SBS_COMPONENT		0x00100000