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misc: panel: Add lcd_home() helper

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Add a helper function to move the cursor to the home position, so
callers no longer need access to internal state.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Geert Uytterhoeven 2017-02-06 15:38:09 +01:00 committed by Greg Kroah-Hartman
parent 3f77b43965
commit 204a4f6d67
1 changed files with 15 additions and 24 deletions
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39
drivers/misc/panel.c
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@ -903,6 +903,13 @@ static void lcd_gotoxy(void)
(lcd.hwidth - 1) : lcd.bwidth - 1));
}
static void lcd_home(void)
{
lcd.addr.x = 0;
lcd.addr.y = 0;
lcd_gotoxy();
}
static void lcd_print(char c)
{
if (lcd.addr.x < lcd.bwidth) {
@ -921,9 +928,7 @@ static void lcd_clear_fast_s(void)
{
int pos;
lcd.addr.x = 0;
lcd.addr.y = 0;
lcd_gotoxy();
lcd_home();
spin_lock_irq(&pprt_lock);
for (pos = 0; pos < lcd.height * lcd.hwidth; pos++) {
@ -935,9 +940,7 @@ static void lcd_clear_fast_s(void)
}
spin_unlock_irq(&pprt_lock);
lcd.addr.x = 0;
lcd.addr.y = 0;
lcd_gotoxy();
lcd_home();
}
/* fills the display with spaces and resets X/Y */
@ -945,9 +948,7 @@ static void lcd_clear_fast_p8(void)
{
int pos;
lcd.addr.x = 0;
lcd.addr.y = 0;
lcd_gotoxy();
lcd_home();
spin_lock_irq(&pprt_lock);
for (pos = 0; pos < lcd.height * lcd.hwidth; pos++) {
@ -973,9 +974,7 @@ static void lcd_clear_fast_p8(void)
}
spin_unlock_irq(&pprt_lock);
lcd.addr.x = 0;
lcd.addr.y = 0;
lcd_gotoxy();
lcd_home();
}
/* fills the display with spaces and resets X/Y */
@ -983,9 +982,7 @@ static void lcd_clear_fast_tilcd(void)
{
int pos;
lcd.addr.x = 0;
lcd.addr.y = 0;
lcd_gotoxy();
lcd_home();
spin_lock_irq(&pprt_lock);
for (pos = 0; pos < lcd.height * lcd.hwidth; pos++) {
@ -996,9 +993,7 @@ static void lcd_clear_fast_tilcd(void)
spin_unlock_irq(&pprt_lock);
lcd.addr.x = 0;
lcd.addr.y = 0;
lcd_gotoxy();
lcd_home();
}
/* clears the display and resets X/Y */
@ -1373,9 +1368,7 @@ static void lcd_write_char(char c)
processed = 1;
} else if (!strcmp(lcd.esc_seq.buf, "[H")) {
/* cursor to home */
lcd.addr.x = 0;
lcd.addr.y = 0;
lcd_gotoxy();
lcd_home();
processed = 1;
}
/* codes starting with ^[[L */
@ -1654,11 +1647,9 @@ static void lcd_init(void)
#else
panel_lcd_print("\x1b[Lc\x1b[Lb\x1b[L*Linux-" UTS_RELEASE);
#endif
lcd.addr.x = 0;
lcd.addr.y = 0;
/* clear the display on the next device opening */
lcd.must_clear = true;
lcd_gotoxy();
lcd_home();
}
/*