auxdisplay updates for v6.11

- Add support for configuring the boot message on line displays,
   - Miscellaneous fixes and improvements.
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Merge tag 'auxdisplay-for-v6.11-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k

Pull auxdisplay updates from Geert Uytterhoeven:

  - add support for configuring the boot message on line displays

  - miscellaneous fixes and improvements

* tag 'auxdisplay-for-v6.11-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k:
  auxdisplay: ht16k33: Drop reference after LED registration
  auxdisplay: Use sizeof(*pointer) instead of sizeof(type)
  auxdisplay: hd44780: add missing MODULE_DESCRIPTION() macro
  auxdisplay: linedisp: add missing MODULE_DESCRIPTION() macro
  auxdisplay: linedisp: Support configuring the boot message
  auxdisplay: charlcd: Provide a forward declaration

drivers/auxdisplay/Kconfig

@@ -316,7 +316,7 @@ endif # PARPORT_PANEL
 
 config PANEL_CHANGE_MESSAGE
 	bool "Change LCD initialization message ?"
-	depends on CHARLCD
+	depends on CHARLCD || LINEDISP
 	help
 	  This allows you to replace the boot message indicating the kernel version
 	  and the driver version with a custom message. This is useful on appliances

drivers/auxdisplay/arm-charlcd.c

@@ -270,7 +270,7 @@ static int __init charlcd_probe(struct platform_device *pdev)
 	struct charlcd *lcd;
 	struct resource *res;
 
-	lcd = kzalloc(sizeof(struct charlcd), GFP_KERNEL);
+	lcd = kzalloc(sizeof(*lcd), GFP_KERNEL);
 	if (!lcd)
 		return -ENOMEM;
 

drivers/auxdisplay/charlcd.h

@@ -36,6 +36,8 @@ enum charlcd_lines {
 	CHARLCD_LINES_2,
 };
 
+struct charlcd_ops;
+
 struct charlcd {
 	const struct charlcd_ops *ops;
 	const unsigned char *char_conv;	/* Optional */

drivers/auxdisplay/hd44780.c

@@ -230,7 +230,7 @@ static int hd44780_probe(struct platform_device *pdev)
 	if (!lcd)
 		goto fail1;
 
-	hd = kzalloc(sizeof(struct hd44780), GFP_KERNEL);
+	hd = kzalloc(sizeof(*hd), GFP_KERNEL);
 	if (!hd)
 		goto fail2;
 

drivers/auxdisplay/hd44780_common.c

@@ -366,4 +366,5 @@ struct hd44780_common *hd44780_common_alloc(void)
 }
 EXPORT_SYMBOL_GPL(hd44780_common_alloc);
 
+MODULE_DESCRIPTION("Common functions for HD44780 (and compatibles) LCD displays");
 MODULE_LICENSE("GPL");

drivers/auxdisplay/ht16k33.c

@@ -483,6 +483,7 @@ static int ht16k33_led_probe(struct device *dev, struct led_classdev *led,
 	led->max_brightness = MAX_BRIGHTNESS;
 
 	err = devm_led_classdev_register_ext(dev, led, &init_data);
+	fwnode_handle_put(init_data.fwnode);
 	if (err)
 		dev_err(dev, "Failed to register LED\n");
 

drivers/auxdisplay/line-display.c

@@ -8,7 +8,9 @@
  * Copyright (C) 2021 Glider bv
  */
 
+#ifndef CONFIG_PANEL_BOOT_MESSAGE
 #include <generated/utsrelease.h>
+#endif
 
 #include <linux/container_of.h>
 #include <linux/device.h>
@@ -312,6 +314,12 @@ static int linedisp_init_map(struct linedisp *linedisp)
 	return 0;
 }
 
+#ifdef CONFIG_PANEL_BOOT_MESSAGE
+#define LINEDISP_INIT_TEXT CONFIG_PANEL_BOOT_MESSAGE
+#else
+#define LINEDISP_INIT_TEXT "Linux " UTS_RELEASE "       "
+#endif
+
 /**
  * linedisp_register - register a character line display
  * @linedisp: pointer to character line display structure
@@ -359,7 +367,7 @@ int linedisp_register(struct linedisp *linedisp, struct device *parent,
 		goto out_del_timer;
 
 	/* display a default message */
-	err = linedisp_display(linedisp, "Linux " UTS_RELEASE "       ", -1);
+	err = linedisp_display(linedisp, LINEDISP_INIT_TEXT, -1);
 	if (err)
 		goto out_del_dev;
 
@@ -388,4 +396,5 @@ void linedisp_unregister(struct linedisp *linedisp)
 }
 EXPORT_SYMBOL_NS_GPL(linedisp_unregister, LINEDISP);
 
+MODULE_DESCRIPTION("Character line display core support");
 MODULE_LICENSE("GPL");