linux-kernel - [PATCH] auxdisplay: linedisp: Support configuring the boot message

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Date: Fri, 31 May 2024 11:20:54 +1200
From: Chris Packham <chris.packham@...iedtelesis.co.nz>
To: andy@...nel.org,
	geert@...ux-m68k.org,
	tzimmermann@...e.de,
	ojeda@...nel.org
Cc: linux-kernel@...r.kernel.org,
	Chris Packham <chris.packham@...iedtelesis.co.nz>
Subject: [PATCH] auxdisplay: linedisp: Support configuring the boot message

Like we do for charlcd, allow the configuration of the initial message
on line-display devices.

Signed-off-by: Chris Packham <chris.packham@...iedtelesis.co.nz>
---
 drivers/auxdisplay/Kconfig        |  2 +-
 drivers/auxdisplay/line-display.c | 10 +++++++++-
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/auxdisplay/Kconfig b/drivers/auxdisplay/Kconfig
index 69d2138d7efb..21545ffba065 100644
--- a/drivers/auxdisplay/Kconfig
+++ b/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
diff --git a/drivers/auxdisplay/line-display.c b/drivers/auxdisplay/line-display.c
index e2b546210f8d..837ca63c8368 100644
--- a/drivers/auxdisplay/line-display.c
+++ b/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 LINE_DISP_INIT_TEXT CONFIG_PANEL_BOOT_MESSAGE
+#else
+#define LINE_DISP_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, LINE_DISP_INIT_TEXT, -1);
 	if (err)
 		goto out_del_dev;
 
-- 
2.45.1