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authorJiri Slaby <jslaby@suse.cz>2022-09-20 08:20:44 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2022-09-22 17:14:08 +0300
commit0fbf36bb6a072a537478f4e1071eb13c451a16e2 (patch)
tree9ead587f5ae2017563dbedd3660f05f68d2d6449 /drivers/tty
parent3af44d9bb0539d5fa27d6159d696fda5f3747bff (diff)
downloadlinux-0fbf36bb6a072a537478f4e1071eb13c451a16e2.tar.xz
tty: serial: extract lqasc_tx_ready() from lqasc_tx_chars()
The condition in lqasc_tx_chars()'s loop is barely readable. Extract it to a separate function. This will make the cleanup in the next patches easier too. (Put it before lqasc_start_tx(), so that we can use it there later.) Signed-off-by: Jiri Slaby <jslaby@suse.cz> Link: https://lore.kernel.org/r/20220920052049.20507-5-jslaby@suse.cz Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
-rw-r--r--drivers/tty/serial/lantiq.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/tty/serial/lantiq.c b/drivers/tty/serial/lantiq.c
index 6637b3caa6b7..6da1b7496c6c 100644
--- a/drivers/tty/serial/lantiq.c
+++ b/drivers/tty/serial/lantiq.c
@@ -139,6 +139,13 @@ lqasc_stop_tx(struct uart_port *port)
return;
}
+static bool lqasc_tx_ready(struct uart_port *port)
+{
+ u32 fstat = __raw_readl(port->membase + LTQ_ASC_FSTAT);
+
+ return (fstat & ASCFSTAT_TXFREEMASK) >> ASCFSTAT_TXFREEOFF;
+}
+
static void
lqasc_start_tx(struct uart_port *port)
{
@@ -228,8 +235,7 @@ lqasc_tx_chars(struct uart_port *port)
return;
}
- while (((__raw_readl(port->membase + LTQ_ASC_FSTAT) &
- ASCFSTAT_TXFREEMASK) >> ASCFSTAT_TXFREEOFF) != 0) {
+ while (lqasc_tx_ready(port)) {
if (port->x_char) {
writeb(port->x_char, port->membase + LTQ_ASC_TBUF);
port->icount.tx++;