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-rw-r--r--Documentation/devicetree/bindings/serial/fsl-imx-uart.txt4
-rw-r--r--Documentation/devicetree/bindings/serial/fsl-lpuart.txt3
-rw-r--r--Documentation/devicetree/bindings/serial/omap_serial.txt1
-rw-r--r--Documentation/devicetree/bindings/serial/rs485.txt1
-rw-r--r--Documentation/driver-model/devres.txt3
-rw-r--r--drivers/tty/moxa.c17
-rw-r--r--drivers/tty/moxa.h2
-rw-r--r--drivers/tty/n_gsm.c2
-rw-r--r--drivers/tty/serdev/core.c31
-rw-r--r--drivers/tty/serdev/serdev-ttyport.c5
-rw-r--r--drivers/tty/serial/amba-pl011.c12
-rw-r--r--drivers/tty/serial/atmel_serial.c2
-rw-r--r--drivers/tty/serial/fsl_lpuart.c15
-rw-r--r--drivers/tty/serial/imx.c47
-rw-r--r--drivers/tty/serial/meson_uart.c31
-rw-r--r--drivers/tty/serial/omap-serial.c11
-rw-r--r--drivers/tty/serial/serial_core.c28
-rw-r--r--drivers/tty/vt/selection.c6
-rw-r--r--include/linux/serdev.h7
-rw-r--r--include/linux/serial_core.h6
20 files changed, 127 insertions, 107 deletions
diff --git a/Documentation/devicetree/bindings/serial/fsl-imx-uart.txt b/Documentation/devicetree/bindings/serial/fsl-imx-uart.txt
index 860a9559839a..afcfbc34e243 100644
--- a/Documentation/devicetree/bindings/serial/fsl-imx-uart.txt
+++ b/Documentation/devicetree/bindings/serial/fsl-imx-uart.txt
@@ -6,10 +6,10 @@ Required properties:
- interrupts : Should contain uart interrupt
Optional properties:
-- fsl,irda-mode : Indicate the uart supports irda mode
- fsl,dte-mode : Indicate the uart works in DTE mode. The uart works
in DCE mode by default.
-- rs485-rts-delay, rs485-rx-during-tx, linux,rs485-enabled-at-boot-time: see rs485.txt
+- rs485-rts-delay, rs485-rts-active-low, rs485-rx-during-tx,
+ linux,rs485-enabled-at-boot-time: see rs485.txt
Please check Documentation/devicetree/bindings/serial/serial.txt
for the complete list of generic properties.
diff --git a/Documentation/devicetree/bindings/serial/fsl-lpuart.txt b/Documentation/devicetree/bindings/serial/fsl-lpuart.txt
index 59567b51cf09..6bd3f2e93d61 100644
--- a/Documentation/devicetree/bindings/serial/fsl-lpuart.txt
+++ b/Documentation/devicetree/bindings/serial/fsl-lpuart.txt
@@ -16,7 +16,8 @@ Required properties:
Optional properties:
- dmas: A list of two dma specifiers, one for each entry in dma-names.
- dma-names: should contain "tx" and "rx".
-- rs485-rts-delay, rs485-rx-during-tx, linux,rs485-enabled-at-boot-time: see rs485.txt
+- rs485-rts-delay, rs485-rts-active-low, rs485-rx-during-tx,
+ linux,rs485-enabled-at-boot-time: see rs485.txt
Note: Optional properties for DMA support. Write them both or both not.
diff --git a/Documentation/devicetree/bindings/serial/omap_serial.txt b/Documentation/devicetree/bindings/serial/omap_serial.txt
index 43eac675f21f..4b0f05adb228 100644
--- a/Documentation/devicetree/bindings/serial/omap_serial.txt
+++ b/Documentation/devicetree/bindings/serial/omap_serial.txt
@@ -20,6 +20,7 @@ Optional properties:
node and a DMA channel number.
- dma-names : "rx" for receive channel, "tx" for transmit channel.
- rs485-rts-delay, rs485-rx-during-tx, linux,rs485-enabled-at-boot-time: see rs485.txt
+- rs485-rts-active-high: drive RTS high when sending (default is low).
Example:
diff --git a/Documentation/devicetree/bindings/serial/rs485.txt b/Documentation/devicetree/bindings/serial/rs485.txt
index b8415936dfdb..b7c29f74ebb2 100644
--- a/Documentation/devicetree/bindings/serial/rs485.txt
+++ b/Documentation/devicetree/bindings/serial/rs485.txt
@@ -12,6 +12,7 @@ Optional properties:
* b is the delay between end of data sent and rts signal in milliseconds
it corresponds to the delay after sending data and actual release of the line.
If this property is not specified, <0 0> is assumed.
+- rs485-rts-active-low: drive RTS low when sending (default is high).
- linux,rs485-enabled-at-boot-time: empty property telling to enable the rs485
feature at boot time. It can be disabled later with proper ioctl.
- rs485-rx-during-tx: empty property that enables the receiving of data even
diff --git a/Documentation/driver-model/devres.txt b/Documentation/driver-model/devres.txt
index c180045eb43b..7c1bb3d0c222 100644
--- a/Documentation/driver-model/devres.txt
+++ b/Documentation/driver-model/devres.txt
@@ -384,6 +384,9 @@ RESET
devm_reset_control_get()
devm_reset_controller_register()
+SERDEV
+ devm_serdev_device_open()
+
SLAVE DMA ENGINE
devm_acpi_dma_controller_register()
diff --git a/drivers/tty/moxa.c b/drivers/tty/moxa.c
index 68cbc03aab4b..250a19f042d7 100644
--- a/drivers/tty/moxa.c
+++ b/drivers/tty/moxa.c
@@ -1487,8 +1487,6 @@ static void moxa_set_tty_param(struct tty_struct *tty, struct ktermios *old_term
if (ts->c_iflag & IXANY)
xany = 1;
- /* Clear the features we don't support */
- ts->c_cflag &= ~CMSPAR;
MoxaPortFlowCtrl(ch, rts, cts, txflow, rxflow, xany);
baud = MoxaPortSetTermio(ch, ts, tty_get_baud_rate(tty));
if (baud == -1)
@@ -1781,10 +1779,17 @@ static int MoxaPortSetTermio(struct moxa_port *port, struct ktermios *termio,
mode |= MX_STOP1;
if (termio->c_cflag & PARENB) {
- if (termio->c_cflag & PARODD)
- mode |= MX_PARODD;
- else
- mode |= MX_PAREVEN;
+ if (termio->c_cflag & PARODD) {
+ if (termio->c_cflag & CMSPAR)
+ mode |= MX_PARMARK;
+ else
+ mode |= MX_PARODD;
+ } else {
+ if (termio->c_cflag & CMSPAR)
+ mode |= MX_PARSPACE;
+ else
+ mode |= MX_PAREVEN;
+ }
} else
mode |= MX_PARNONE;
diff --git a/drivers/tty/moxa.h b/drivers/tty/moxa.h
index 8ce89fd36c7b..563d2dce80b3 100644
--- a/drivers/tty/moxa.h
+++ b/drivers/tty/moxa.h
@@ -301,5 +301,7 @@
#define MX_PARNONE 0x00
#define MX_PAREVEN 0x40
#define MX_PARODD 0xC0
+#define MX_PARMARK 0xA0
+#define MX_PARSPACE 0x20
#endif
diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c
index 5131bdc9e765..48e791d95f76 100644
--- a/drivers/tty/n_gsm.c
+++ b/drivers/tty/n_gsm.c
@@ -2955,7 +2955,6 @@ static int gsmtty_open(struct tty_struct *tty, struct file *filp)
static void gsmtty_close(struct tty_struct *tty, struct file *filp)
{
struct gsm_dlci *dlci = tty->driver_data;
- struct gsm_mux *gsm;
if (dlci == NULL)
return;
@@ -2964,7 +2963,6 @@ static void gsmtty_close(struct tty_struct *tty, struct file *filp)
mutex_lock(&dlci->mutex);
gsm_destroy_network(dlci);
mutex_unlock(&dlci->mutex);
- gsm = dlci->gsm;
if (tty_port_close_start(&dlci->port, tty, filp) == 0)
return;
gsm_dlci_begin_close(dlci);
diff --git a/drivers/tty/serdev/core.c b/drivers/tty/serdev/core.c
index 1bef39828ca7..28133dbd2808 100644
--- a/drivers/tty/serdev/core.c
+++ b/drivers/tty/serdev/core.c
@@ -132,6 +132,33 @@ void serdev_device_close(struct serdev_device *serdev)
}
EXPORT_SYMBOL_GPL(serdev_device_close);
+static void devm_serdev_device_release(struct device *dev, void *dr)
+{
+ serdev_device_close(*(struct serdev_device **)dr);
+}
+
+int devm_serdev_device_open(struct device *dev, struct serdev_device *serdev)
+{
+ struct serdev_device **dr;
+ int ret;
+
+ dr = devres_alloc(devm_serdev_device_release, sizeof(*dr), GFP_KERNEL);
+ if (!dr)
+ return -ENOMEM;
+
+ ret = serdev_device_open(serdev);
+ if (ret) {
+ devres_free(dr);
+ return ret;
+ }
+
+ *dr = serdev;
+ devres_add(dev, dr);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(devm_serdev_device_open);
+
void serdev_device_write_wakeup(struct serdev_device *serdev)
{
complete(&serdev->write_comp);
@@ -268,8 +295,8 @@ static int serdev_drv_probe(struct device *dev)
static int serdev_drv_remove(struct device *dev)
{
const struct serdev_device_driver *sdrv = to_serdev_device_driver(dev->driver);
-
- sdrv->remove(to_serdev_device(dev));
+ if (sdrv->remove)
+ sdrv->remove(to_serdev_device(dev));
return 0;
}
diff --git a/drivers/tty/serdev/serdev-ttyport.c b/drivers/tty/serdev/serdev-ttyport.c
index 247788a16f0b..c2629ab1bbcf 100644
--- a/drivers/tty/serdev/serdev-ttyport.c
+++ b/drivers/tty/serdev/serdev-ttyport.c
@@ -122,6 +122,8 @@ static int ttyport_open(struct serdev_controller *ctrl)
if (ret)
goto err_close;
+ tty_unlock(serport->tty);
+
/* Bring the UART into a known 8 bits no parity hw fc state */
ktermios = tty->termios;
ktermios.c_iflag &= ~(IGNBRK | BRKINT | PARMRK | ISTRIP |
@@ -131,11 +133,12 @@ static int ttyport_open(struct serdev_controller *ctrl)
ktermios.c_cflag &= ~(CSIZE | PARENB);
ktermios.c_cflag |= CS8;
ktermios.c_cflag |= CRTSCTS;
+ /* Hangups are not supported so make sure to ignore carrier detect. */
+ ktermios.c_cflag |= CLOCAL;
tty_set_termios(tty, &ktermios);
set_bit(SERPORT_ACTIVE, &serport->flags);
- tty_unlock(serport->tty);
return 0;
err_close:
diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c
index 04af8de8617e..4b40a5b449ee 100644
--- a/drivers/tty/serial/amba-pl011.c
+++ b/drivers/tty/serial/amba-pl011.c
@@ -314,10 +314,9 @@ static void pl011_write(unsigned int val, const struct uart_amba_port *uap,
static int pl011_fifo_to_tty(struct uart_amba_port *uap)
{
u16 status;
- unsigned int ch, flag, max_count = 256;
- int fifotaken = 0;
+ unsigned int ch, flag, fifotaken;
- while (max_count--) {
+ for (fifotaken = 0; fifotaken != 256; fifotaken++) {
status = pl011_read(uap, REG_FR);
if (status & UART01x_FR_RXFE)
break;
@@ -326,7 +325,6 @@ static int pl011_fifo_to_tty(struct uart_amba_port *uap)
ch = pl011_read(uap, REG_DR) | UART_DUMMY_DR_RX;
flag = TTY_NORMAL;
uap->port.icount.rx++;
- fifotaken++;
if (unlikely(ch & UART_DR_ERROR)) {
if (ch & UART011_DR_BE) {
@@ -1482,12 +1480,10 @@ static irqreturn_t pl011_int(int irq, void *dev_id)
struct uart_amba_port *uap = dev_id;
unsigned long flags;
unsigned int status, pass_counter = AMBA_ISR_PASS_LIMIT;
- u16 imsc;
int handled = 0;
spin_lock_irqsave(&uap->port.lock, flags);
- imsc = pl011_read(uap, REG_IMSC);
- status = pl011_read(uap, REG_RIS) & imsc;
+ status = pl011_read(uap, REG_RIS) & uap->im;
if (status) {
do {
check_apply_cts_event_workaround(uap);
@@ -1511,7 +1507,7 @@ static irqreturn_t pl011_int(int irq, void *dev_id)
if (pass_counter-- == 0)
break;
- status = pl011_read(uap, REG_RIS) & imsc;
+ status = pl011_read(uap, REG_RIS) & uap->im;
} while (status != 0);
handled = 1;
}
diff --git a/drivers/tty/serial/atmel_serial.c b/drivers/tty/serial/atmel_serial.c
index efa25611ca0c..df46a9e88c34 100644
--- a/drivers/tty/serial/atmel_serial.c
+++ b/drivers/tty/serial/atmel_serial.c
@@ -2345,7 +2345,7 @@ static int atmel_init_port(struct atmel_uart_port *atmel_port,
atmel_init_property(atmel_port, pdev);
atmel_set_ops(port);
- of_get_rs485_mode(pdev->dev.of_node, &port->rs485);
+ uart_get_rs485_mode(&pdev->dev, &port->rs485);
port->iotype = UPIO_MEM;
port->flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP;
diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c
index 1c4d3f387138..8cf112f2efc3 100644
--- a/drivers/tty/serial/fsl_lpuart.c
+++ b/drivers/tty/serial/fsl_lpuart.c
@@ -2206,23 +2206,16 @@ static int lpuart_probe(struct platform_device *pdev)
if (ret)
goto failed_attach_port;
- of_get_rs485_mode(np, &sport->port.rs485);
+ uart_get_rs485_mode(&pdev->dev, &sport->port.rs485);
- if (sport->port.rs485.flags & SER_RS485_RX_DURING_TX) {
+ if (sport->port.rs485.flags & SER_RS485_RX_DURING_TX)
dev_err(&pdev->dev, "driver doesn't support RX during TX\n");
- return -ENOSYS;
- }
if (sport->port.rs485.delay_rts_before_send ||
- sport->port.rs485.delay_rts_after_send) {
+ sport->port.rs485.delay_rts_after_send)
dev_err(&pdev->dev, "driver doesn't support RTS delays\n");
- return -ENOSYS;
- }
- if (sport->port.rs485.flags & SER_RS485_ENABLED) {
- sport->port.rs485.flags |= SER_RS485_RTS_ON_SEND;
- writeb(UARTMODEM_TXRTSE, sport->port.membase + UARTMODEM);
- }
+ lpuart_config_rs485(&sport->port, &sport->port.rs485);
sport->dma_tx_chan = dma_request_slave_channel(sport->port.dev, "tx");
if (!sport->dma_tx_chan)
diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
index e4b3d9123a03..c2b29fd66e8a 100644
--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c
@@ -703,25 +703,6 @@ out:
return IRQ_HANDLED;
}
-static void imx_disable_rx_int(struct imx_port *sport)
-{
- unsigned long temp;
-
- /* disable the receiver ready and aging timer interrupts */
- temp = readl(sport->port.membase + UCR1);
- temp &= ~(UCR1_RRDYEN);
- writel(temp, sport->port.membase + UCR1);
-
- temp = readl(sport->port.membase + UCR2);
- temp &= ~(UCR2_ATEN);
- writel(temp, sport->port.membase + UCR2);
-
- /* disable the rx errors interrupts */
- temp = readl(sport->port.membase + UCR4);
- temp &= ~UCR4_OREN;
- writel(temp, sport->port.membase + UCR4);
-}
-
static void clear_rx_errors(struct imx_port *sport);
/*
@@ -1252,18 +1233,21 @@ static int imx_startup(struct uart_port *port)
if (sport->dma_is_inited && !sport->dma_is_enabled)
imx_enable_dma(sport);
- temp = readl(sport->port.membase + UCR1);
- temp |= UCR1_RRDYEN | UCR1_UARTEN;
+ temp = readl(sport->port.membase + UCR1) & ~UCR1_RRDYEN;
+ if (!sport->dma_is_enabled)
+ temp |= UCR1_RRDYEN;
+ temp |= UCR1_UARTEN;
if (sport->have_rtscts)
temp |= UCR1_RTSDEN;
writel(temp, sport->port.membase + UCR1);
- temp = readl(sport->port.membase + UCR4);
- temp |= UCR4_OREN;
+ temp = readl(sport->port.membase + UCR4) & ~UCR4_OREN;
+ if (!sport->dma_is_enabled)
+ temp |= UCR4_OREN;
writel(temp, sport->port.membase + UCR4);
- temp = readl(sport->port.membase + UCR2);
+ temp = readl(sport->port.membase + UCR2) & ~UCR2_ATEN;
temp |= (UCR2_RXEN | UCR2_TXEN);
if (!sport->have_rtscts)
temp |= UCR2_IRTS;
@@ -1297,10 +1281,8 @@ static int imx_startup(struct uart_port *port)
* In our iMX53 the average delay for the first reception dropped from
* approximately 35000 microseconds to 1000 microseconds.
*/
- if (sport->dma_is_enabled) {
- imx_disable_rx_int(sport);
+ if (sport->dma_is_enabled)
start_rx_dma(sport);
- }
spin_unlock_irqrestore(&sport->port.lock, flags);
@@ -2017,8 +1999,6 @@ static int serial_imx_probe_dt(struct imx_port *sport,
if (of_get_property(np, "rts-gpios", NULL))
sport->have_rtsgpio = 1;
- of_get_rs485_mode(np, &sport->port.rs485);
-
return 0;
}
#else
@@ -2080,7 +2060,6 @@ static int serial_imx_probe(struct platform_device *pdev)
sport->port.fifosize = 32;
sport->port.ops = &imx_pops;
sport->port.rs485_config = imx_rs485_config;
- sport->port.rs485.flags |= SER_RS485_RTS_ON_SEND;
sport->port.flags = UPF_BOOT_AUTOCONF;
timer_setup(&sport->timer, imx_timeout, 0);
@@ -2111,6 +2090,14 @@ static int serial_imx_probe(struct platform_device *pdev)
return ret;
}
+ uart_get_rs485_mode(&pdev->dev, &sport->port.rs485);
+
+ if (sport->port.rs485.flags & SER_RS485_ENABLED &&
+ (!sport->have_rtscts || !sport->have_rtsgpio))
+ dev_err(&pdev->dev, "no RTS control, disabling rs485\n");
+
+ imx_rs485_config(&sport->port, &sport->port.rs485);
+
/* Disable interrupts before requesting them */
reg = readl_relaxed(sport->port.membase + UCR1);
reg &= ~(UCR1_ADEN | UCR1_TRDYEN | UCR1_IDEN | UCR1_RRDYEN |
diff --git a/drivers/tty/serial/meson_uart.c b/drivers/tty/serial/meson_uart.c
index daafe60175da..8a842591b37c 100644
--- a/drivers/tty/serial/meson_uart.c
+++ b/drivers/tty/serial/meson_uart.c
@@ -34,9 +34,15 @@
/* AML_UART_CONTROL bits */
#define AML_UART_TX_EN BIT(12)
#define AML_UART_RX_EN BIT(13)
+#define AML_UART_TWO_WIRE_EN BIT(15)
+#define AML_UART_STOP_BIT_LEN_MASK (0x03 << 16)
+#define AML_UART_STOP_BIT_1SB (0x00 << 16)
+#define AML_UART_STOP_BIT_2SB (0x01 << 16)
+#define AML_UART_PARITY_TYPE BIT(18)
+#define AML_UART_PARITY_EN BIT(19)
#define AML_UART_TX_RST BIT(22)
#define AML_UART_RX_RST BIT(23)
-#define AML_UART_CLR_ERR BIT(24)
+#define AML_UART_CLEAR_ERR BIT(24)
#define AML_UART_RX_INT_EN BIT(27)
#define AML_UART_TX_INT_EN BIT(28)
#define AML_UART_DATA_LEN_MASK (0x03 << 20)
@@ -57,15 +63,6 @@
AML_UART_FRAME_ERR | \
AML_UART_TX_FIFO_WERR)
-/* AML_UART_CONTROL bits */
-#define AML_UART_TWO_WIRE_EN BIT(15)
-#define AML_UART_PARITY_TYPE BIT(18)
-#define AML_UART_PARITY_EN BIT(19)
-#define AML_UART_CLEAR_ERR BIT(24)
-#define AML_UART_STOP_BIN_LEN_MASK (0x03 << 16)
-#define AML_UART_STOP_BIN_1SB (0x00 << 16)
-#define AML_UART_STOP_BIN_2SB (0x01 << 16)
-
/* AML_UART_MISC bits */
#define AML_UART_XMIT_IRQ(c) (((c) & 0xff) << 8)
#define AML_UART_RECV_IRQ(c) ((c) & 0xff)
@@ -263,10 +260,10 @@ static void meson_uart_reset(struct uart_port *port)
u32 val;
val = readl(port->membase + AML_UART_CONTROL);
- val |= (AML_UART_RX_RST | AML_UART_TX_RST | AML_UART_CLR_ERR);
+ val |= (AML_UART_RX_RST | AML_UART_TX_RST | AML_UART_CLEAR_ERR);
writel(val, port->membase + AML_UART_CONTROL);
- val &= ~(AML_UART_RX_RST | AML_UART_TX_RST | AML_UART_CLR_ERR);
+ val &= ~(AML_UART_RX_RST | AML_UART_TX_RST | AML_UART_CLEAR_ERR);
writel(val, port->membase + AML_UART_CONTROL);
}
@@ -276,9 +273,9 @@ static int meson_uart_startup(struct uart_port *port)
int ret = 0;
val = readl(port->membase + AML_UART_CONTROL);
- val |= AML_UART_CLR_ERR;
+ val |= AML_UART_CLEAR_ERR;
writel(val, port->membase + AML_UART_CONTROL);
- val &= ~AML_UART_CLR_ERR;
+ val &= ~AML_UART_CLEAR_ERR;
writel(val, port->membase + AML_UART_CONTROL);
val |= (AML_UART_RX_EN | AML_UART_TX_EN);
@@ -354,11 +351,11 @@ static void meson_uart_set_termios(struct uart_port *port,
else
val &= ~AML_UART_PARITY_TYPE;
- val &= ~AML_UART_STOP_BIN_LEN_MASK;
+ val &= ~AML_UART_STOP_BIT_LEN_MASK;
if (cflags & CSTOPB)
- val |= AML_UART_STOP_BIN_2SB;
+ val |= AML_UART_STOP_BIT_2SB;
else
- val |= AML_UART_STOP_BIN_1SB;
+ val |= AML_UART_STOP_BIT_1SB;
if (cflags & CRTSCTS)
val &= ~AML_UART_TWO_WIRE_EN;
diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c
index 53d59e9b944a..56e683373d6d 100644
--- a/drivers/tty/serial/omap-serial.c
+++ b/drivers/tty/serial/omap-serial.c
@@ -1611,10 +1611,15 @@ static int serial_omap_probe_rs485(struct uart_omap_port *up,
if (!np)
return 0;
- if (of_property_read_bool(np, "rs485-rts-active-high"))
+ uart_get_rs485_mode(up->dev, rs485conf);
+
+ if (of_property_read_bool(np, "rs485-rts-active-high")) {
rs485conf->flags |= SER_RS485_RTS_ON_SEND;
- else
+ rs485conf->flags &= ~SER_RS485_RTS_AFTER_SEND;
+ } else {
+ rs485conf->flags &= ~SER_RS485_RTS_ON_SEND;
rs485conf->flags |= SER_RS485_RTS_AFTER_SEND;
+ }
/* check for tx enable gpio */
up->rts_gpio = of_get_named_gpio_flags(np, "rts-gpio", 0, &flags);
@@ -1632,8 +1637,6 @@ static int serial_omap_probe_rs485(struct uart_omap_port *up,
up->rts_gpio = -EINVAL;
}
- of_get_rs485_mode(np, rs485conf);
-
return 0;
}
diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index 854995e1cae7..f57969de2f1c 100644
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -3013,19 +3013,20 @@ EXPORT_SYMBOL(uart_add_one_port);
EXPORT_SYMBOL(uart_remove_one_port);
/**
- * of_get_rs485_mode() - Implement parsing rs485 properties
- * @np: uart node
+ * uart_get_rs485_mode() - retrieve rs485 properties for given uart
+ * @dev: uart device
* @rs485conf: output parameter
*
* This function implements the device tree binding described in
* Documentation/devicetree/bindings/serial/rs485.txt.
*/
-void of_get_rs485_mode(struct device_node *np, struct serial_rs485 *rs485conf)
+void uart_get_rs485_mode(struct device *dev, struct serial_rs485 *rs485conf)
{
u32 rs485_delay[2];
int ret;
- ret = of_property_read_u32_array(np, "rs485-rts-delay", rs485_delay, 2);
+ ret = device_property_read_u32_array(dev, "rs485-rts-delay",
+ rs485_delay, 2);
if (!ret) {
rs485conf->delay_rts_before_send = rs485_delay[0];
rs485conf->delay_rts_after_send = rs485_delay[1];
@@ -3035,18 +3036,25 @@ void of_get_rs485_mode(struct device_node *np, struct serial_rs485 *rs485conf)
}
/*
- * clear full-duplex and enabled flags to get to a defined state with
- * the two following properties.
+ * Clear full-duplex and enabled flags, set RTS polarity to active high
+ * to get to a defined state with the following properties:
*/
- rs485conf->flags &= ~(SER_RS485_RX_DURING_TX | SER_RS485_ENABLED);
+ rs485conf->flags &= ~(SER_RS485_RX_DURING_TX | SER_RS485_ENABLED |
+ SER_RS485_RTS_AFTER_SEND);
+ rs485conf->flags |= SER_RS485_RTS_ON_SEND;
- if (of_property_read_bool(np, "rs485-rx-during-tx"))
+ if (device_property_read_bool(dev, "rs485-rx-during-tx"))
rs485conf->flags |= SER_RS485_RX_DURING_TX;
- if (of_property_read_bool(np, "linux,rs485-enabled-at-boot-time"))
+ if (device_property_read_bool(dev, "linux,rs485-enabled-at-boot-time"))
rs485conf->flags |= SER_RS485_ENABLED;
+
+ if (device_property_read_bool(dev, "rs485-rts-active-low")) {
+ rs485conf->flags &= ~SER_RS485_RTS_ON_SEND;
+ rs485conf->flags |= SER_RS485_RTS_AFTER_SEND;
+ }
}
-EXPORT_SYMBOL_GPL(of_get_rs485_mode);
+EXPORT_SYMBOL_GPL(uart_get_rs485_mode);
MODULE_DESCRIPTION("Serial driver core");
MODULE_LICENSE("GPL");
diff --git a/drivers/tty/vt/selection.c b/drivers/tty/vt/selection.c
index af4da9507180..7851383fbd6c 100644
--- a/drivers/tty/vt/selection.c
+++ b/drivers/tty/vt/selection.c
@@ -186,11 +186,7 @@ int set_selection(const struct tiocl_selection __user *sel, struct tty_struct *t
}
if (ps > pe) /* make sel_start <= sel_end */
- {
- int tmp = ps;
- ps = pe;
- pe = tmp;
- }
+ swap(ps, pe);
if (sel_cons != vc_cons[fg_console].d) {
clear_selection();
diff --git a/include/linux/serdev.h b/include/linux/serdev.h
index d609e6dc5bad..48d8ce26ad18 100644
--- a/include/linux/serdev.h
+++ b/include/linux/serdev.h
@@ -27,8 +27,10 @@ struct serdev_device;
/**
* struct serdev_device_ops - Callback operations for a serdev device
- * @receive_buf: Function called with data received from device.
- * @write_wakeup: Function called when ready to transmit more data.
+ * @receive_buf: Function called with data received from device;
+ * returns number of bytes accepted; may sleep.
+ * @write_wakeup: Function called when ready to transmit more data; must
+ * not sleep.
*/
struct serdev_device_ops {
int (*receive_buf)(struct serdev_device *, const unsigned char *, size_t);
@@ -193,6 +195,7 @@ static inline int serdev_controller_receive_buf(struct serdev_controller *ctrl,
int serdev_device_open(struct serdev_device *);
void serdev_device_close(struct serdev_device *);
+int devm_serdev_device_open(struct device *, struct serdev_device *);
unsigned int serdev_device_set_baudrate(struct serdev_device *, unsigned int);
void serdev_device_set_flow_control(struct serdev_device *, bool);
int serdev_device_write_buf(struct serdev_device *, const unsigned char *, size_t);
diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
index 37b044e78333..b60b225c0a59 100644
--- a/include/linux/serial_core.h
+++ b/include/linux/serial_core.h
@@ -501,9 +501,5 @@ static inline int uart_handle_break(struct uart_port *port)
(cflag) & CRTSCTS || \
!((cflag) & CLOCAL))
-/*
- * Common device tree parsing helpers
- */
-void of_get_rs485_mode(struct device_node *np, struct serial_rs485 *rs485conf);
-
+void uart_get_rs485_mode(struct device *dev, struct serial_rs485 *rs485conf);
#endif /* LINUX_SERIAL_CORE_H */
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