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Message-Id: <1416344174-9155-6-git-send-email-marius.gorski@gmail.com>
Date: Tue, 18 Nov 2014 21:56:10 +0100
From: Mariusz Gorski <marius.gorski@...il.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Willy Tarreau <w@....eu>
Cc: devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org
Subject: [PATCH 5/9] staging: panel: Start making module params read-only
Start decoupling module params from the actual device state,
both for lcd and keypad, by keeping the params read-only
and moving the device state to related structs.
Signed-off-by: Mariusz Gorski <marius.gorski@...il.com>
---
drivers/staging/panel/panel.c | 35 +++++++++++++++++++++--------------
1 file changed, 21 insertions(+), 14 deletions(-)
diff --git a/drivers/staging/panel/panel.c b/drivers/staging/panel/panel.c
index 97fc4ca..7f2f5f8 100644
--- a/drivers/staging/panel/panel.c
+++ b/drivers/staging/panel/panel.c
@@ -214,6 +214,10 @@ static pmask_t phys_prev;
static char inputs_stable;
/* these variables are specific to the keypad */
+static struct {
+ bool enabled;
+} keypad;
+
static char keypad_buffer[KEYPAD_BUFFER];
static int keypad_buflen;
static int keypad_start;
@@ -221,6 +225,9 @@ static char keypressed;
static wait_queue_head_t keypad_read_wait;
/* lcd-specific variables */
+static struct {
+ bool enabled;
+} lcd;
/* contains the LCD config state */
static unsigned long int lcd_flags;
@@ -1395,7 +1402,7 @@ static void panel_lcd_print(const char *s)
const char *tmp = s;
int count = strlen(s);
- if (lcd_enabled && lcd_initialized) {
+ if (lcd.enabled && lcd_initialized) {
for (; count-- > 0; tmp++) {
if (!in_interrupt() && (((count + 1) & 0x1f) == 0))
/* let's be a little nice with other processes
@@ -1925,7 +1932,7 @@ static void panel_process_inputs(void)
static void panel_scan_timer(void)
{
- if (keypad_enabled && keypad_initialized) {
+ if (keypad.enabled && keypad_initialized) {
if (spin_trylock_irq(&pprt_lock)) {
phys_scan_contacts();
@@ -1937,7 +1944,7 @@ static void panel_scan_timer(void)
panel_process_inputs();
}
- if (lcd_enabled && lcd_initialized) {
+ if (lcd.enabled && lcd_initialized) {
if (keypressed) {
if (light_tempo == 0 && ((lcd_flags & LCD_FLAG_L) == 0))
lcd_backlight(1);
@@ -2116,7 +2123,7 @@ static void keypad_init(void)
static int panel_notify_sys(struct notifier_block *this, unsigned long code,
void *unused)
{
- if (lcd_enabled && lcd_initialized) {
+ if (lcd.enabled && lcd_initialized) {
switch (code) {
case SYS_DOWN:
panel_lcd_print
@@ -2172,13 +2179,13 @@ static void panel_attach(struct parport *port)
/* must init LCD first, just in case an IRQ from the keypad is
* generated at keypad init
*/
- if (lcd_enabled) {
+ if (lcd.enabled) {
lcd_init();
if (misc_register(&lcd_dev))
goto err_unreg_device;
}
- if (keypad_enabled) {
+ if (keypad.enabled) {
keypad_init();
if (misc_register(&keypad_dev))
goto err_lcd_unreg;
@@ -2186,7 +2193,7 @@ static void panel_attach(struct parport *port)
return;
err_lcd_unreg:
- if (lcd_enabled)
+ if (lcd.enabled)
misc_deregister(&lcd_dev);
err_unreg_device:
parport_unregister_device(pprt);
@@ -2204,12 +2211,12 @@ static void panel_detach(struct parport *port)
return;
}
- if (keypad_enabled && keypad_initialized) {
+ if (keypad.enabled && keypad_initialized) {
misc_deregister(&keypad_dev);
keypad_initialized = 0;
}
- if (lcd_enabled && lcd_initialized) {
+ if (lcd.enabled && lcd_initialized) {
misc_deregister(&lcd_dev);
lcd_initialized = 0;
}
@@ -2285,8 +2292,8 @@ static int __init panel_init_module(void)
break;
}
- lcd_enabled = (lcd_type > 0);
- keypad_enabled = (keypad_type > 0);
+ lcd.enabled = (lcd_type > 0);
+ keypad.enabled = (keypad_type > 0);
switch (keypad_type) {
case KEYPAD_TYPE_OLD:
@@ -2311,7 +2318,7 @@ static int __init panel_init_module(void)
return -EIO;
}
- if (!lcd_enabled && !keypad_enabled) {
+ if (!lcd.enabled && !keypad.enabled) {
/* no device enabled, let's release the parport */
if (pprt) {
parport_release(pprt);
@@ -2346,12 +2353,12 @@ static void __exit panel_cleanup_module(void)
del_timer_sync(&scan_timer);
if (pprt != NULL) {
- if (keypad_enabled) {
+ if (keypad.enabled) {
misc_deregister(&keypad_dev);
keypad_initialized = 0;
}
- if (lcd_enabled) {
+ if (lcd.enabled) {
panel_lcd_print("\x0cLCD driver " PANEL_VERSION
"\nunloaded.\x1b[Lc\x1b[Lb\x1b[L-");
misc_deregister(&lcd_dev);
--
2.1.3
--
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