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staging: panel: Make two more module params read-only 

Make keypad_type and lcd_type module params read-only.
This step also starts making it more clear what is
the precedence of device params coming from different
sources (device profile, runtime module param values etc).

Signed-off-by: Mariusz Gorski <marius.gorski@gmail.com>
Acked-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mariusz Gorski 2014-11-27 22:36:50 +01:00 committed by Greg Kroah-Hartman
parent a8b2580b73
commit 87b8e0c881
1 changed files with 37 additions and 34 deletions
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71
drivers/staging/panel/panel.c
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@ -227,6 +227,9 @@ static struct {
bool enabled;
} lcd;
/* Needed only for init */
static int selected_lcd_type = NOT_SET;
/* contains the LCD config state */
static unsigned long int lcd_flags;
/* contains the LCD X offset */
@ -1415,7 +1418,7 @@ static void panel_lcd_print(const char *s)
/* initialize the LCD driver */
static void lcd_init(void)
{
switch (lcd_type) {
switch (selected_lcd_type) {
case LCD_TYPE_OLD:
/* parallel mode, 8 bits */
if (lcd_proto == NOT_SET)
@ -2233,28 +2236,21 @@ static struct parport_driver panel_driver = {
/* init function */
static int __init panel_init_module(void)
{
/* for backwards compatibility */
if (keypad_type == NOT_SET)
keypad_type = keypad_enabled;
if (lcd_type == NOT_SET)
lcd_type = lcd_enabled;
int selected_keypad_type = NOT_SET;
/* take care of an eventual profile */
switch (profile) {
case PANEL_PROFILE_CUSTOM:
/* custom profile */
if (keypad_type == NOT_SET)
keypad_type = DEFAULT_KEYPAD_TYPE;
if (lcd_type == NOT_SET)
lcd_type = DEFAULT_LCD_TYPE;
selected_keypad_type = DEFAULT_KEYPAD_TYPE;
selected_lcd_type = DEFAULT_LCD_TYPE;
break;
case PANEL_PROFILE_OLD:
/* 8 bits, 2*16, old keypad */
if (keypad_type == NOT_SET)
keypad_type = KEYPAD_TYPE_OLD;
if (lcd_type == NOT_SET)
lcd_type = LCD_TYPE_OLD;
selected_keypad_type = KEYPAD_TYPE_OLD;
selected_lcd_type = LCD_TYPE_OLD;
/* TODO: This two are a little hacky, sort it out later */
if (lcd_width == NOT_SET)
lcd_width = 16;
if (lcd_hwidth == NOT_SET)
@ -2262,38 +2258,45 @@ static int __init panel_init_module(void)
break;
case PANEL_PROFILE_NEW:
/* serial, 2*16, new keypad */
if (keypad_type == NOT_SET)
keypad_type = KEYPAD_TYPE_NEW;
if (lcd_type == NOT_SET)
lcd_type = LCD_TYPE_KS0074;
selected_keypad_type = KEYPAD_TYPE_NEW;
selected_lcd_type = LCD_TYPE_KS0074;
break;
case PANEL_PROFILE_HANTRONIX:
/* 8 bits, 2*16 hantronix-like, no keypad */
if (keypad_type == NOT_SET)
keypad_type = KEYPAD_TYPE_NONE;
if (lcd_type == NOT_SET)
lcd_type = LCD_TYPE_HANTRONIX;
selected_keypad_type = KEYPAD_TYPE_NONE;
selected_lcd_type = LCD_TYPE_HANTRONIX;
break;
case PANEL_PROFILE_NEXCOM:
/* generic 8 bits, 2*16, nexcom keypad, eg. Nexcom. */
if (keypad_type == NOT_SET)
keypad_type = KEYPAD_TYPE_NEXCOM;
if (lcd_type == NOT_SET)
lcd_type = LCD_TYPE_NEXCOM;
selected_keypad_type = KEYPAD_TYPE_NEXCOM;
selected_lcd_type = LCD_TYPE_NEXCOM;
break;
case PANEL_PROFILE_LARGE:
/* 8 bits, 2*40, old keypad */
if (keypad_type == NOT_SET)
keypad_type = KEYPAD_TYPE_OLD;
if (lcd_type == NOT_SET)
lcd_type = LCD_TYPE_OLD;
selected_keypad_type = KEYPAD_TYPE_OLD;
selected_lcd_type = LCD_TYPE_OLD;
break;
}
lcd.enabled = (lcd_type > 0);
keypad.enabled = (keypad_type > 0);
/*
* Overwrite selection with module param values (both keypad and lcd),
* where the deprecated params have lower prio.
*/
if (keypad_enabled > -1)
selected_keypad_type = keypad_enabled;
if (keypad_type > -1)
selected_keypad_type = keypad_type;
switch (keypad_type) {
keypad.enabled = (selected_keypad_type > 0);
if (lcd_enabled > -1)
selected_lcd_type = lcd_enabled;
if (lcd_type > -1)
selected_lcd_type = lcd_type;
lcd.enabled = (selected_lcd_type > 0);
switch (selected_keypad_type) {
case KEYPAD_TYPE_OLD:
keypad_profile = old_keypad_profile;
break;