diff options
Diffstat (limited to 'drivers/misc/ti-st/st_core.c')
| -rw-r--r-- | drivers/misc/ti-st/st_core.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/misc/ti-st/st_core.c b/drivers/misc/ti-st/st_core.c index f7bb96f3a424..dd2c879faff6 100644 --- a/drivers/misc/ti-st/st_core.c +++ b/drivers/misc/ti-st/st_core.c @@ -52,6 +52,24 @@ static void remove_channel_from_table(struct st_data_s *st_gdata, st_gdata->list[proto->chnl_id] = NULL; } +/* + * called from KIM during firmware download. + * + * This is a wrapper function to tty->ops->write_room. + * It returns number of free space available in + * uart tx buffer. + */ +int st_get_uart_wr_room(struct st_data_s *st_gdata) +{ + struct tty_struct *tty; + if (unlikely(st_gdata == NULL || st_gdata->tty == NULL)) { + pr_err("tty unavailable to perform write"); + return -1; + } + tty = st_gdata->tty; + return tty->ops->write_room(tty); +} + /* can be called in from * -- KIM (during fw download) * -- ST Core (during st_write) |