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Commit e0046bb3 authored by Linus Torvalds's avatar Linus Torvalds
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Merge tag 'auxdisplay-for-linus-v5.1-rc2' of git://github.com/ojeda/linux 

Pull auxdisplay updates from Miguel Ojeda:
 "A few fixes and improvements for auxdisplay:

   - Series to fix a memory leak in hd44780 while introducing
     charlcd_free(). From Andy Shevchenko

   - Series to clean up the Kconfig menus and a couple of improvements
     for charlcd. From Mans Rullgard"

* tag 'auxdisplay-for-linus-v5.1-rc2' of git://github.com/ojeda/linux:
  auxdisplay: charlcd: make backlight initial state configurable
  auxdisplay: charlcd: simplify init message display
  auxdisplay: deconfuse configuration
  auxdisplay: hd44780: Convert to use charlcd_free()
  auxdisplay: panel: Convert to use charlcd_free()
  auxdisplay: charlcd: Introduce charlcd_free() helper
  auxdisplay: charlcd: Move to_priv() to charlcd namespace
  auxdisplay: hd44780: Fix memory leak on ->remove()
parents 1fa8109f cc5d04d8

drivers/auxdisplay/Kconfig

+33 −5
Original line number Diff line number Diff line
@@ -164,9 +164,7 @@ config ARM_CHARLCD 
	  line and the Linux version on the second line, but that's

	  still useful.



endif # AUXDISPLAY



menuconfig PANEL

menuconfig PARPORT_PANEL

	tristate "Parallel port LCD/Keypad Panel support"

	depends on PARPORT

	select CHARLCD
@@ -178,7 +176,7 @@ menuconfig PANEL 
	  compiled as a module, or linked into the kernel and started at boot.

	  If you don't understand what all this is about, say N.



if PANEL

if PARPORT_PANEL



config PANEL_PARPORT

	int "Default parallel port number (0=LPT1)"
@@ -419,8 +417,11 @@ config PANEL_LCD_PIN_BL 


	  Default for the 'BL' pin in custom profile is '0' (uncontrolled).



endif # PARPORT_PANEL



config PANEL_CHANGE_MESSAGE

	bool "Change LCD initialization message ?"

	depends on CHARLCD

	default "n"

	---help---

	  This allows you to replace the boot message indicating the kernel version
@@ -444,7 +445,34 @@ config PANEL_BOOT_MESSAGE 
	  An empty message will only clear the display at driver init time. Any other

	  printf()-formatted message is valid with newline and escape codes.



endif # PANEL

choice

	prompt "Backlight initial state"

	default CHARLCD_BL_FLASH



	config CHARLCD_BL_OFF

		bool "Off"

		help

		  Backlight is initially turned off



	config CHARLCD_BL_ON

		bool "On"

		help

		  Backlight is initially turned on



	config CHARLCD_BL_FLASH

		bool "Flash"

		help

		  Backlight is flashed briefly on init



endchoice



endif # AUXDISPLAY



config PANEL

	tristate "Parallel port LCD/Keypad Panel support (OLD OPTION)"

	depends on PARPORT

	select AUXDISPLAY

	select PARPORT_PANEL



config CHARLCD

	tristate "Character LCD core support" if COMPILE_TEST

drivers/auxdisplay/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -10,4 +10,4 @@ obj-$(CONFIG_CFAG12864B) += cfag12864b.o cfag12864bfb.o 
obj-$(CONFIG_IMG_ASCII_LCD)	+= img-ascii-lcd.o

obj-$(CONFIG_HD44780)		+= hd44780.o

obj-$(CONFIG_HT16K33)		+= ht16k33.o

obj-$(CONFIG_PANEL)             += panel.o
 
obj-$(CONFIG_PARPORT_PANEL)	+= panel.o

drivers/auxdisplay/charlcd.c

+35 −20
Original line number Diff line number Diff line
@@ -91,7 +91,7 @@ struct charlcd_priv { 
	unsigned long long drvdata[0];

};



#define to_priv(p)	container_of(p, struct charlcd_priv, lcd)

#define charlcd_to_priv(p)	container_of(p, struct charlcd_priv, lcd)



/* Device single-open policy control */

static atomic_t charlcd_available = ATOMIC_INIT(1);
@@ -105,7 +105,7 @@ static void long_sleep(int ms) 
/* turn the backlight on or off */

static void charlcd_backlight(struct charlcd *lcd, int on)

{

	struct charlcd_priv *priv = to_priv(lcd);

	struct charlcd_priv *priv = charlcd_to_priv(lcd);



	if (!lcd->ops->backlight)

		return;
@@ -134,7 +134,7 @@ static void charlcd_bl_off(struct work_struct *work) 
/* turn the backlight on for a little while */

void charlcd_poke(struct charlcd *lcd)

{

	struct charlcd_priv *priv = to_priv(lcd);

	struct charlcd_priv *priv = charlcd_to_priv(lcd);



	if (!lcd->ops->backlight)

		return;
@@ -152,7 +152,7 @@ EXPORT_SYMBOL_GPL(charlcd_poke); 


static void charlcd_gotoxy(struct charlcd *lcd)

{

	struct charlcd_priv *priv = to_priv(lcd);

	struct charlcd_priv *priv = charlcd_to_priv(lcd);

	unsigned int addr;



	/*
@@ -170,7 +170,7 @@ static void charlcd_gotoxy(struct charlcd *lcd) 


static void charlcd_home(struct charlcd *lcd)

{

	struct charlcd_priv *priv = to_priv(lcd);

	struct charlcd_priv *priv = charlcd_to_priv(lcd);



	priv->addr.x = 0;

	priv->addr.y = 0;
@@ -179,7 +179,7 @@ static void charlcd_home(struct charlcd *lcd) 


static void charlcd_print(struct charlcd *lcd, char c)

{

	struct charlcd_priv *priv = to_priv(lcd);

	struct charlcd_priv *priv = charlcd_to_priv(lcd);



	if (priv->addr.x < lcd->bwidth) {

		if (lcd->char_conv)
@@ -211,7 +211,7 @@ static void charlcd_clear_fast(struct charlcd *lcd) 
/* clears the display and resets X/Y */

static void charlcd_clear_display(struct charlcd *lcd)

{

	struct charlcd_priv *priv = to_priv(lcd);

	struct charlcd_priv *priv = charlcd_to_priv(lcd);



	lcd->ops->write_cmd(lcd, LCD_CMD_DISPLAY_CLEAR);

	priv->addr.x = 0;
@@ -223,7 +223,7 @@ static void charlcd_clear_display(struct charlcd *lcd) 
static int charlcd_init_display(struct charlcd *lcd)

{

	void (*write_cmd_raw)(struct charlcd *lcd, int cmd);

	struct charlcd_priv *priv = to_priv(lcd);

	struct charlcd_priv *priv = charlcd_to_priv(lcd);

	u8 init;



	if (lcd->ifwidth != 4 && lcd->ifwidth != 8)
@@ -369,7 +369,7 @@ static bool parse_xy(const char *s, unsigned long *x, unsigned long *y) 


static inline int handle_lcd_special_code(struct charlcd *lcd)

{

	struct charlcd_priv *priv = to_priv(lcd);

	struct charlcd_priv *priv = charlcd_to_priv(lcd);



	/* LCD special codes */
@@ -580,7 +580,7 @@ static inline int handle_lcd_special_code(struct charlcd *lcd) 


static void charlcd_write_char(struct charlcd *lcd, char c)

{

	struct charlcd_priv *priv = to_priv(lcd);

	struct charlcd_priv *priv = charlcd_to_priv(lcd);



	/* first, we'll test if we're in escape mode */

	if ((c != '\n') && priv->esc_seq.len >= 0) {
@@ -705,7 +705,7 @@ static ssize_t charlcd_write(struct file *file, const char __user *buf, 


static int charlcd_open(struct inode *inode, struct file *file)

{

	struct charlcd_priv *priv = to_priv(the_charlcd);

	struct charlcd_priv *priv = charlcd_to_priv(the_charlcd);

	int ret;



	ret = -EBUSY;
@@ -763,10 +763,24 @@ static void charlcd_puts(struct charlcd *lcd, const char *s) 
	}

}



#ifdef CONFIG_PANEL_BOOT_MESSAGE

#define LCD_INIT_TEXT CONFIG_PANEL_BOOT_MESSAGE

#else

#define LCD_INIT_TEXT "Linux-" UTS_RELEASE "\n"

#endif



#ifdef CONFIG_CHARLCD_BL_ON

#define LCD_INIT_BL "\x1b[L+"

#elif defined(CONFIG_CHARLCD_BL_FLASH)

#define LCD_INIT_BL "\x1b[L*"

#else

#define LCD_INIT_BL "\x1b[L-"

#endif



/* initialize the LCD driver */

static int charlcd_init(struct charlcd *lcd)

{

	struct charlcd_priv *priv = to_priv(lcd);

	struct charlcd_priv *priv = charlcd_to_priv(lcd);

	int ret;



	if (lcd->ops->backlight) {
@@ -784,13 +798,8 @@ static int charlcd_init(struct charlcd *lcd) 
		return ret;



	/* display a short message */

#ifdef CONFIG_PANEL_CHANGE_MESSAGE

#ifdef CONFIG_PANEL_BOOT_MESSAGE

	charlcd_puts(lcd, "\x1b[Lc\x1b[Lb\x1b[L*" CONFIG_PANEL_BOOT_MESSAGE);

#endif

#else

	charlcd_puts(lcd, "\x1b[Lc\x1b[Lb\x1b[L*Linux-" UTS_RELEASE "\n");

#endif

	charlcd_puts(lcd, "\x1b[Lc\x1b[Lb" LCD_INIT_BL LCD_INIT_TEXT);



	/* clear the display on the next device opening */

	priv->must_clear = true;

	charlcd_home(lcd);
@@ -818,6 +827,12 @@ struct charlcd *charlcd_alloc(unsigned int drvdata_size) 
}

EXPORT_SYMBOL_GPL(charlcd_alloc);



void charlcd_free(struct charlcd *lcd)

{

	kfree(charlcd_to_priv(lcd));

}

EXPORT_SYMBOL_GPL(charlcd_free);



static int panel_notify_sys(struct notifier_block *this, unsigned long code,

			    void *unused)

{
@@ -866,7 +881,7 @@ EXPORT_SYMBOL_GPL(charlcd_register); 


int charlcd_unregister(struct charlcd *lcd)

{

	struct charlcd_priv *priv = to_priv(lcd);

	struct charlcd_priv *priv = charlcd_to_priv(lcd);



	unregister_reboot_notifier(&panel_notifier);

	charlcd_puts(lcd, "\x0cLCD driver unloaded.\x1b[Lc\x1b[Lb\x1b[L-");

drivers/auxdisplay/hd44780.c

+3 −1
Original line number Diff line number Diff line
@@ -271,7 +271,7 @@ static int hd44780_probe(struct platform_device *pdev) 
	return 0;



fail:

	kfree(lcd);

	charlcd_free(lcd);

	return ret;

}
@@ -280,6 +280,8 @@ static int hd44780_remove(struct platform_device *pdev) 
	struct charlcd *lcd = platform_get_drvdata(pdev);



	charlcd_unregister(lcd);



	charlcd_free(lcd);

	return 0;

}

drivers/auxdisplay/panel.c

+2 −2
Original line number Diff line number Diff line
@@ -1620,7 +1620,7 @@ static void panel_attach(struct parport *port) 
	if (lcd.enabled)

		charlcd_unregister(lcd.charlcd);

err_unreg_device:

	kfree(lcd.charlcd);

	charlcd_free(lcd.charlcd);

	lcd.charlcd = NULL;

	parport_unregister_device(pprt);

	pprt = NULL;
@@ -1647,7 +1647,7 @@ static void panel_detach(struct parport *port) 
	if (lcd.enabled) {

		charlcd_unregister(lcd.charlcd);

		lcd.initialized = false;

		kfree(lcd.charlcd);

		charlcd_free(lcd.charlcd);

		lcd.charlcd = NULL;

	}