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tty: serial: fsl_lpuart: Introduce lpuart*_setup_watermark_enable() 

Most users of lpuart*_setup_watermark() enable identical set of flags
right after the call, so combine those two action into a subroutine
and make use of it.

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/20190805185701.22863-5-andrew.smirnov@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Andrey Smirnov 2019-08-05 11:56:59 -07:00 committed by Greg Kroah-Hartman
parent 4ff69041ec
commit 352bd55e5d
1 changed files with 28 additions and 22 deletions
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50
drivers/tty/serial/fsl_lpuart.c
View File

@ -1403,6 +1403,17 @@ static void lpuart_setup_watermark(struct lpuart_port *sport)
writeb(cr2_saved, sport->port.membase + UARTCR2);
}
static void lpuart_setup_watermark_enable(struct lpuart_port *sport)
{
unsigned char cr2;
lpuart_setup_watermark(sport);
cr2 = readb(sport->port.membase + UARTCR2);
cr2 |= UARTCR2_RIE | UARTCR2_TIE | UARTCR2_RE | UARTCR2_TE;
writeb(cr2, sport->port.membase + UARTCR2);
}
static void lpuart32_setup_watermark(struct lpuart_port *sport)
{
unsigned long val, ctrl;
@ -1428,6 +1439,17 @@ static void lpuart32_setup_watermark(struct lpuart_port *sport)
lpuart32_write(&sport->port, ctrl_saved, UARTCTRL);
}
static void lpuart32_setup_watermark_enable(struct lpuart_port *sport)
{
u32 temp;
lpuart32_setup_watermark(sport);
temp = lpuart32_read(&sport->port, UARTCTRL);
temp |= UARTCTRL_RE | UARTCTRL_TE | UARTCTRL_ILIE;
lpuart32_write(&sport->port, temp, UARTCTRL);
}
static void rx_dma_timer_init(struct lpuart_port *sport)
{
timer_setup(&sport->lpuart_timer, lpuart_timer_func, 0);
@ -1488,11 +1510,7 @@ static int lpuart_startup(struct uart_port *port)
spin_lock_irqsave(&sport->port.lock, flags);
lpuart_setup_watermark(sport);
temp = readb(sport->port.membase + UARTCR2);
temp |= UARTCR2_RIE | UARTCR2_TIE | UARTCR2_RE | UARTCR2_TE;
writeb(temp, sport->port.membase + UARTCR2);
lpuart_setup_watermark_enable(sport);
lpuart_rx_dma_startup(sport);
lpuart_tx_dma_startup(sport);
@ -1538,11 +1556,7 @@ static int lpuart32_startup(struct uart_port *port)
spin_lock_irqsave(&sport->port.lock, flags);
lpuart32_setup_watermark(sport);
temp = lpuart32_read(&sport->port, UARTCTRL);
temp |= UARTCTRL_RE | UARTCTRL_TE | UARTCTRL_ILIE;
lpuart32_write(&sport->port, temp, UARTCTRL);
lpuart32_setup_watermark_enable(sport);
lpuart_rx_dma_startup(sport);
@ -2558,22 +2572,14 @@ static int lpuart_resume(struct device *dev)
{
struct lpuart_port *sport = dev_get_drvdata(dev);
bool irq_wake = irqd_is_wakeup_set(irq_get_irq_data(sport->port.irq));
unsigned long temp;
if (sport->port.suspended && !irq_wake)
lpuart_enable_clks(sport);
if (lpuart_is_32(sport)) {
lpuart32_setup_watermark(sport);
temp = lpuart32_read(&sport->port, UARTCTRL);
temp |= UARTCTRL_RE | UARTCTRL_TE | UARTCTRL_ILIE;
lpuart32_write(&sport->port, temp, UARTCTRL);
} else {
lpuart_setup_watermark(sport);
temp = readb(sport->port.membase + UARTCR2);
temp |= UARTCR2_RIE | UARTCR2_TIE | UARTCR2_RE | UARTCR2_TE;
writeb(temp, sport->port.membase + UARTCR2);
}
if (lpuart_is_32(sport))
lpuart32_setup_watermark_enable(sport);
else
lpuart_setup_watermark_enable(sport);
if (sport->lpuart_dma_rx_use) {
if (irq_wake) {