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Subject[RFC 22/25] leds: tm1826: Add combined glyph support
Date
Allow to squeeze the text "HEllO" into a 4-digit display,
as seen on MeLE V9 TV box.

Enable this combining mode only if the text would overflow.

Signed-off-by: Andreas Färber <afaerber@suse.de>
---
drivers/leds/leds-tm1628.c | 31 ++++++++++++++++++++++++++++++-
1 file changed, 30 insertions(+), 1 deletion(-)

diff --git a/drivers/leds/leds-tm1628.c b/drivers/leds/leds-tm1628.c
index e2c2a5d91596..0c0d099de8b0 100644
--- a/drivers/leds/leds-tm1628.c
+++ b/drivers/leds/leds-tm1628.c
@@ -347,6 +347,28 @@ static u8 tm1628_get_char_ssd_map(char ch)
return 0x0;
}

+struct tm1628_ssd_glyph {
+ char *str;
+ u8 segs;
+};
+
+static const struct tm1628_ssd_glyph tm1628_glyph_ssd_map[] = {
+ { "ll", SSD_TOP_LEFT | SSD_BOTTOM_LEFT |
+ SSD_TOP_RIGHT | SSD_BOTTOM_RIGHT },
+};
+
+static u8 tm1628_get_glyph_ssd_map(const char *str)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(tm1628_glyph_ssd_map); i++) {
+ if (!strncmp(tm1628_glyph_ssd_map[i].str, str, 2))
+ return tm1628_glyph_ssd_map[i].segs;
+ }
+
+ return 0x0;
+}
+
static int tm1628_display_apply_map(struct tm1628 *s,
struct tm1628_display *display, u8 map)
{
@@ -366,7 +388,7 @@ static ssize_t text_store(struct device *dev,
{
struct tm1628 *s = dev_get_drvdata(dev);
size_t offset, len = count;
- u8 map;
+ u8 map, glyph_map;
int i, ret;

if (len > 0 && buf[len - 1] == '\n')
@@ -375,6 +397,13 @@ static ssize_t text_store(struct device *dev,
for (i = 0, offset = 0; i < s->num_displays; i++) {
if (offset < len) {
map = tm1628_get_char_ssd_map(buf[offset]);
+ if (offset + 1 < len && len > s->num_displays) {
+ glyph_map = tm1628_get_glyph_ssd_map(buf + offset);
+ if (glyph_map) {
+ map = glyph_map;
+ offset++;
+ }
+ }
offset++;
} else
map = 0x0;
--
2.16.4
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