diff options
| author | Mariusz Gorski <marius.gorski@gmail.com> | 2014-11-28 00:36:50 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-12-03 03:34:34 +0300 |
| commit | 87b8e0c88195cfc98c15e717af87034efba533f6 (patch) | |
| tree | 3eb8b0ea7cf3e91a31b2d4fe7e4ced293ab914d0 /drivers/staging/panel | |
| parent | a8b2580b736746a4f978dfebf25be7f3f457bdd8 (diff) | |
| download | linux-87b8e0c88195cfc98c15e717af87034efba533f6.tar.xz | |
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>
Diffstat (limited to 'drivers/staging/panel')
| -rw-r--r-- | drivers/staging/panel/panel.c | 71 |
1 files changed, 37 insertions, 34 deletions
diff --git a/drivers/staging/panel/panel.c b/drivers/staging/panel/panel.c index 7e5bb53c4a8a..5868a2813b30 100644 --- a/drivers/staging/panel/panel.c +++ b/drivers/staging/panel/panel.c @@ -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; + + 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 (keypad_type) { + switch (selected_keypad_type) { case KEYPAD_TYPE_OLD: keypad_profile = old_keypad_profile; break; |