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tty: serial: extract tx_ready() from __serial_lpc32xx_tx()

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The condition in __serial_lpc32xx_tx()'s loop is barely readable.
Extract it to a separate function. This will make the cleanup in the
next patches easier too.

Cc: Vladimir Zapolskiy <vz@mleia.com>
Cc: <linux-arm-kernel@lists.infradead.org>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20220920052049.20507-6-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jiri Slaby 2022-09-20 07:20:45 +02:00 committed by Greg Kroah-Hartman
parent 0fbf36bb6a
commit 2a4be3a55c
1 changed files with 8 additions and 2 deletions
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10
drivers/tty/serial/lpc32xx_hs.c
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@ -278,6 +278,13 @@ static void __serial_lpc32xx_rx(struct uart_port *port)
static void serial_lpc32xx_stop_tx(struct uart_port *port);
static bool serial_lpc32xx_tx_ready(struct uart_port *port)
{
u32 level = readl(LPC32XX_HSUART_LEVEL(port->membase));
return LPC32XX_HSU_TX_LEV(level) < 64;
}
static void __serial_lpc32xx_tx(struct uart_port *port)
{
struct circ_buf *xmit = &port->state->xmit;
@ -293,8 +300,7 @@ static void __serial_lpc32xx_tx(struct uart_port *port)
goto exit_tx;
/* Transfer data */
while (LPC32XX_HSU_TX_LEV(readl(
LPC32XX_HSUART_LEVEL(port->membase))) < 64) {
while (serial_lpc32xx_tx_ready(port)) {
writel((u32) xmit->buf[xmit->tail],
LPC32XX_HSUART_FIFO(port->membase));
xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);