linux-kernel - [PATCH 3.4 015/146] staging: panel: fix lcd type

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Date:	Tue, 15 Sep 2015 17:02:10 +0800
From:	lizf@...nel.org
To:	stable@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org,
	Sudip Mukherjee <sudipm.mukherjee@...il.com>,
	Sudip Mukherjee <sudip@...torindia.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Zefan Li <lizefan@...wei.com>
Subject: [PATCH 3.4 015/146] staging: panel: fix lcd type

From: Sudip Mukherjee <sudipm.mukherjee@...il.com>

3.4.109-rc1 review patch.  If anyone has any objections, please let me know.

------------------


commit 2c20d92dad5db6440cfa88d811b69fd605240ce4 upstream.

the lcd type as defined in the Kconfig is not matching in the code.
as a result the rs, rw and en pins were getting interchanged.
Kconfig defines the value of PANEL_LCD to be 1 if we select custom
configuration but in the code LCD_TYPE_CUSTOM is defined as 5.

my hardware is LCD_TYPE_CUSTOM, but the pins were assigned to it
as pins of LCD_TYPE_OLD, and it was not working.
Now values are corrected with referenece to the values defined in
Kconfig and it is working.
checked on JHD204A lcd with LCD_TYPE_CUSTOM configuration.

Signed-off-by: Sudip Mukherjee <sudip@...torindia.org>
Acked-by: Willy Tarreau <w@....eu>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
[lizf: Backported to 3.4: adjust context]
Signed-off-by: Zefan Li <lizefan@...wei.com>
---
 drivers/staging/panel/panel.c | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/drivers/staging/panel/panel.c b/drivers/staging/panel/panel.c
index 6183573..5d4b4f07 100644
--- a/drivers/staging/panel/panel.c
+++ b/drivers/staging/panel/panel.c
@@ -273,11 +273,11 @@ static unsigned char lcd_bits[LCD_PORTS][LCD_BITS][BIT_STATES];
  * LCD types
  */
 #define LCD_TYPE_NONE		0
-#define LCD_TYPE_OLD		1
-#define LCD_TYPE_KS0074		2
-#define LCD_TYPE_HANTRONIX	3
-#define LCD_TYPE_NEXCOM		4
-#define LCD_TYPE_CUSTOM		5
+#define LCD_TYPE_CUSTOM		1
+#define LCD_TYPE_OLD		2
+#define LCD_TYPE_KS0074		3
+#define LCD_TYPE_HANTRONIX	4
+#define LCD_TYPE_NEXCOM		5
 
 /*
  * keypad types
@@ -455,8 +455,7 @@ MODULE_PARM_DESC(keypad_enabled, "Deprecated option, use keypad_type instead");
 static int lcd_type = -1;
 module_param(lcd_type, int, 0000);
 MODULE_PARM_DESC(lcd_type,
-		 "LCD type: 0=none, 1=old //, 2=serial ks0074, "
-		 "3=hantronix //, 4=nexcom //, 5=compiled-in");
+		 "LCD type: 0=none, 1=compiled-in, 2=old, 3=serial ks0074, 4=hantronix, 5=nexcom");
 
 static int lcd_proto = -1;
 module_param(lcd_proto, int, 0000);
-- 
1.9.1

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