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tty: serial: fsl_lpuart: Introduce lpuart32_configure() 

Code doing final steps of TX/RX configuration in lpuart32_startup()
and lpuart_resume() is identical, so move it into a standalone
subroutine.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Cc: Stefan Agner <stefan@agner.ch>
Cc: Chris Healy <cphealy@gmail.com>
Cc: Cory Tusar <cory.tusar@zii.aero>
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jiri Slaby <jslaby@suse.com>
Cc: linux-imx@nxp.com
Cc: linux-serial@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Link: https://lore.kernel.org/r/20190805185701.22863-4-andrew.smirnov@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Andrey Smirnov 2019-08-05 11:56:58 -07:00 committed by Greg Kroah-Hartman
parent fd60e8e4a7
commit 4ff69041ec
1 changed files with 21 additions and 27 deletions
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48
drivers/tty/serial/fsl_lpuart.c
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@ -1502,6 +1502,24 @@ static int lpuart_startup(struct uart_port *port)
return 0;
}
static void lpuart32_configure(struct lpuart_port *sport)
{
unsigned long temp;
if (sport->lpuart_dma_rx_use) {
/* RXWATER must be 0 */
temp = lpuart32_read(&sport->port, UARTWATER);
temp &= ~(UARTWATER_WATER_MASK << UARTWATER_RXWATER_OFF);
lpuart32_write(&sport->port, temp, UARTWATER);
}
temp = lpuart32_read(&sport->port, UARTCTRL);
if (!sport->lpuart_dma_rx_use)
temp |= UARTCTRL_RIE;
if (!sport->lpuart_dma_tx_use)
temp |= UARTCTRL_TIE;
lpuart32_write(&sport->port, temp, UARTCTRL);
}
static int lpuart32_startup(struct uart_port *port)
{
struct lpuart_port *sport = container_of(port, struct lpuart_port, port);
@ -1530,18 +1548,7 @@ static int lpuart32_startup(struct uart_port *port)
lpuart_rx_dma_startup(sport);
lpuart_tx_dma_startup(sport);
if (sport->lpuart_dma_rx_use) {
/* RXWATER must be 0 */
temp = lpuart32_read(&sport->port, UARTWATER);
temp &= ~(UARTWATER_WATER_MASK << UARTWATER_RXWATER_OFF);
lpuart32_write(&sport->port, temp, UARTWATER);
}
temp = lpuart32_read(&sport->port, UARTCTRL);
if (!sport->lpuart_dma_rx_use)
temp |= UARTCTRL_RIE;
if (!sport->lpuart_dma_tx_use)
temp |= UARTCTRL_TIE;
lpuart32_write(&sport->port, temp, UARTCTRL);
lpuart32_configure(sport);
spin_unlock_irqrestore(&sport->port.lock, flags);
return 0;
@ -2579,21 +2586,8 @@ static int lpuart_resume(struct device *dev)
lpuart_tx_dma_startup(sport);
if (lpuart_is_32(sport)) {
if (sport->lpuart_dma_rx_use) {
/* RXWATER must be 0 */
temp = lpuart32_read(&sport->port, UARTWATER);
temp &= ~(UARTWATER_WATER_MASK <<
UARTWATER_RXWATER_OFF);
lpuart32_write(&sport->port, temp, UARTWATER);
}
temp = lpuart32_read(&sport->port, UARTCTRL);
if (!sport->lpuart_dma_rx_use)
temp |= UARTCTRL_RIE;
if (!sport->lpuart_dma_tx_use)
temp |= UARTCTRL_TIE;
lpuart32_write(&sport->port, temp, UARTCTRL);
}
if (lpuart_is_32(sport))
lpuart32_configure(sport);
uart_resume_port(&lpuart_reg, &sport->port);