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authorAndy Shevchenko <andriy.shevchenko@linux.intel.com>2020-05-18 22:36:17 +0300
committerMiguel Ojeda <miguel.ojeda.sandonis@gmail.com>2020-05-30 00:33:50 +0300
commit3f03b64981723b61048ea46642bcaa9b518f3ad3 (patch)
treed90419af531eb9940790a7a094aecf87b1aa3eae /drivers/auxdisplay
parent9cb1fd0efd195590b828b9b865421ad345a4a145 (diff)
downloadlinux-3f03b64981723b61048ea46642bcaa9b518f3ad3.tar.xz
auxdisplay: charlcd: Reuse hex_to_bin() instead of custom code
hex_to_bin() may be used to convert hexdecimal digit to its binary representation. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
Diffstat (limited to 'drivers/auxdisplay')
-rw-r--r--drivers/auxdisplay/charlcd.c17
1 files changed, 6 insertions, 11 deletions
diff --git a/drivers/auxdisplay/charlcd.c b/drivers/auxdisplay/charlcd.c
index d58278ae9e4a..5aee0f546351 100644
--- a/drivers/auxdisplay/charlcd.c
+++ b/drivers/auxdisplay/charlcd.c
@@ -485,24 +485,19 @@ static inline int handle_lcd_special_code(struct charlcd *lcd)
shift = 0;
value = 0;
while (*esc && cgoffset < 8) {
+ int half;
+
shift ^= 4;
- if (*esc >= '0' && *esc <= '9') {
- value |= (*esc - '0') << shift;
- } else if (*esc >= 'A' && *esc <= 'F') {
- value |= (*esc - 'A' + 10) << shift;
- } else if (*esc >= 'a' && *esc <= 'f') {
- value |= (*esc - 'a' + 10) << shift;
- } else {
- esc++;
+
+ half = hex_to_bin(*esc++);
+ if (half < 0)
continue;
- }
+ value |= half << shift;
if (shift == 0) {
cgbytes[cgoffset++] = value;
value = 0;
}
-
- esc++;
}
lcd->ops->write_cmd(lcd, LCD_CMD_SET_CGRAM_ADDR | (cgaddr * 8));