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auxdisplay: Use an enum for charlcd backlight on/off ops 

We use an enum for calling the functions in charlcd, that turn the
backlight on or off. This enum is generic and can be used for other
charlcd turn on / turn off operations as well.

Reviewed-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Lars Poeschel <poeschel@lemonage.de>
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
This commit is contained in:
Lars Poeschel 2020-11-03 10:58:04 +01:00 committed by Miguel Ojeda
parent 3cea11cd5e
commit 66ce7d5c1e
4 changed files with 9 additions and 4 deletions
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2
drivers/auxdisplay/charlcd.c
View File

@ -101,7 +101,7 @@ static void long_sleep(int ms)
}
/* turn the backlight on or off */
static void charlcd_backlight(struct charlcd *lcd, int on)
static void charlcd_backlight(struct charlcd *lcd, enum charlcd_onoff on)
{
struct charlcd_priv *priv = charlcd_to_priv(lcd);

7
drivers/auxdisplay/charlcd.h
View File

@ -9,6 +9,11 @@
#ifndef _CHARLCD_H
#define _CHARLCD_H
enum charlcd_onoff {
CHARLCD_OFF = 0,
CHARLCD_ON,
};
struct charlcd {
const struct charlcd_ops *ops;
const unsigned char *char_conv; /* Optional */
@ -30,7 +35,7 @@ struct charlcd_ops {
/* Optional */
void (*write_cmd_raw4)(struct charlcd *lcd, int cmd); /* 4-bit only */
void (*clear_fast)(struct charlcd *lcd);
void (*backlight)(struct charlcd *lcd, int on);
void (*backlight)(struct charlcd *lcd, enum charlcd_onoff on);
};
struct charlcd *charlcd_alloc(unsigned int drvdata_size);

2
drivers/auxdisplay/hd44780.c
View File

@ -37,7 +37,7 @@ struct hd44780 {
struct gpio_desc *pins[PIN_NUM];
};
static void hd44780_backlight(struct charlcd *lcd, int on)
static void hd44780_backlight(struct charlcd *lcd, enum charlcd_onoff on)
{
struct hd44780 *hd = lcd->drvdata;

2
drivers/auxdisplay/panel.c
View File

@ -708,7 +708,7 @@ static void lcd_send_serial(int byte)
}
/* turn the backlight on or off */
static void lcd_backlight(struct charlcd *charlcd, int on)
static void lcd_backlight(struct charlcd *charlcd, enum charlcd_onoff on)
{
if (lcd.pins.bl == PIN_NONE)
return;