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| author |   Jiri Slaby <jslaby@suse.cz> | 2022-09-20 07:20:44 +0200 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-09-22 16:14:08 +0200 |
| commit | 0fbf36bb6a072a537478f4e1071eb13c451a16e2 (patch) | |
| tree | 9ead587f5ae2017563dbedd3660f05f68d2d6449 | |
| parent | tty: serial: altera_uart_{r,t}x_chars() need only uart_port (diff) | |
| download | linux-dev-0fbf36bb6a072a537478f4e1071eb13c451a16e2.tar.xz linux-dev-0fbf36bb6a072a537478f4e1071eb13c451a16e2.zip | |
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>
| -rw-r--r-- | drivers/tty/serial/lantiq.c | 10 |
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++; |