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video: fbdev: ssd1307fb: Extract ssd1307fb_set_{col,page}_range()

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Extract the code to set the column and page ranges into two helper
functions.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210727134730.3765898-4-geert@linux-m68k.org
This commit is contained in:
Geert Uytterhoeven 2021-07-27 15:47:28 +02:00 committed by Sam Ravnborg
parent ef9d793825
commit 8a15af3b86
1 changed files with 37 additions and 20 deletions
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57
drivers/video/fbdev/ssd1307fb.c
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@ -152,6 +152,40 @@ static inline int ssd1307fb_write_cmd(struct i2c_client *client, u8 cmd)
return ret;
}
static int ssd1307fb_set_col_range(struct ssd1307fb_par *par, u8 col_start,
u8 cols)
{
u8 col_end = col_start + cols - 1;
int ret;
ret = ssd1307fb_write_cmd(par->client, SSD1307FB_SET_COL_RANGE);
if (ret < 0)
return ret;
ret = ssd1307fb_write_cmd(par->client, col_start);
if (ret < 0)
return ret;
return ssd1307fb_write_cmd(par->client, col_end);
}
static int ssd1307fb_set_page_range(struct ssd1307fb_par *par, u8 page_start,
u8 pages)
{
u8 page_end = page_start + pages - 1;
int ret;
ret = ssd1307fb_write_cmd(par->client, SSD1307FB_SET_PAGE_RANGE);
if (ret < 0)
return ret;
ret = ssd1307fb_write_cmd(par->client, page_start);
if (ret < 0)
return ret;
return ssd1307fb_write_cmd(par->client, page_end);
}
static int ssd1307fb_update_display(struct ssd1307fb_par *par)
{
struct ssd1307fb_array *array;
@ -462,30 +496,13 @@ static int ssd1307fb_init(struct ssd1307fb_par *par)
return ret;
/* Set column range */
ret = ssd1307fb_write_cmd(par->client, SSD1307FB_SET_COL_RANGE);
if (ret < 0)
return ret;
ret = ssd1307fb_write_cmd(par->client, par->col_offset);
if (ret < 0)
return ret;
ret = ssd1307fb_write_cmd(par->client, par->col_offset + par->width - 1);
ret = ssd1307fb_set_col_range(par, par->col_offset, par->width);
if (ret < 0)
return ret;
/* Set page range */
ret = ssd1307fb_write_cmd(par->client, SSD1307FB_SET_PAGE_RANGE);
if (ret < 0)
return ret;
ret = ssd1307fb_write_cmd(par->client, par->page_offset);
if (ret < 0)
return ret;
ret = ssd1307fb_write_cmd(par->client,
par->page_offset +
DIV_ROUND_UP(par->height, 8) - 1);
ret = ssd1307fb_set_page_range(par, par->page_offset,
DIV_ROUND_UP(par->height, 8));
if (ret < 0)
return ret;