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authorStephen Rothwell <sfr@canb.auug.org.au>2022-06-28 08:56:26 +1000
committerStephen Rothwell <sfr@canb.auug.org.au>2022-06-28 08:56:26 +1000
commitb1ea8982c332efcbb82ad1232f32eb54a4b7792a (patch)
tree6c3216586358c8bff94df41ad718324b05079fc9
parenteb7a82e5e0e0692a613d3b250450ae96bf9931e0 (diff)
parentec5ad331680c96ef3dd30dc297b206988023b9e1 (diff)
downloadlinux-next-b1ea8982c332efcbb82ad1232f32eb54a4b7792a.tar.gz
Merge branch 'tty-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git
Diffstat
-rw-r--r--drivers/tty/serial/8250/8250_dma.c6
-rw-r--r--drivers/tty/serial/8250/8250_dw.c24
-rw-r--r--drivers/tty/serial/8250/8250_port.c2
-rw-r--r--drivers/tty/serial/amba-pl011.c23
-rw-r--r--drivers/tty/serial/samsung_tty.c5
-rw-r--r--include/uapi/linux/tty.h3
6 files changed, 41 insertions, 22 deletions
diff --git a/drivers/tty/serial/8250/8250_dma.c b/drivers/tty/serial/8250/8250_dma.c
index 7133fceed35e3..a8dba4a0a8fb7 100644
--- a/drivers/tty/serial/8250/8250_dma.c
+++ b/drivers/tty/serial/8250/8250_dma.c
@@ -106,10 +106,10 @@ int serial8250_tx_dma(struct uart_8250_port *p)
UART_XMIT_SIZE, DMA_TO_DEVICE);
dma_async_issue_pending(dma->txchan);
- if (dma->tx_err) {
+ serial8250_clear_THRI(p);
+ if (dma->tx_err)
dma->tx_err = 0;
- serial8250_clear_THRI(p);
- }
+
return 0;
err:
dma->tx_err = 1;
diff --git a/drivers/tty/serial/8250/8250_dw.c b/drivers/tty/serial/8250/8250_dw.c
index f57bbd32ef11a..b1ab088fbe6e5 100644
--- a/drivers/tty/serial/8250/8250_dw.c
+++ b/drivers/tty/serial/8250/8250_dw.c
@@ -773,18 +773,18 @@ static const struct of_device_id dw8250_of_match[] = {
MODULE_DEVICE_TABLE(of, dw8250_of_match);
static const struct acpi_device_id dw8250_acpi_match[] = {
- { "INT33C4", 0 },
- { "INT33C5", 0 },
- { "INT3434", 0 },
- { "INT3435", 0 },
- { "80860F0A", 0 },
- { "8086228A", 0 },
- { "APMC0D08", 0},
- { "AMD0020", 0 },
- { "AMDI0020", 0 },
- { "AMDI0022", 0 },
- { "BRCM2032", 0 },
- { "HISI0031", 0 },
+ { "80860F0A", (kernel_ulong_t)&dw8250_dw_apb },
+ { "8086228A", (kernel_ulong_t)&dw8250_dw_apb },
+ { "AMD0020", (kernel_ulong_t)&dw8250_dw_apb },
+ { "AMDI0020", (kernel_ulong_t)&dw8250_dw_apb },
+ { "AMDI0022", (kernel_ulong_t)&dw8250_dw_apb },
+ { "APMC0D08", (kernel_ulong_t)&dw8250_dw_apb},
+ { "BRCM2032", (kernel_ulong_t)&dw8250_dw_apb },
+ { "HISI0031", (kernel_ulong_t)&dw8250_dw_apb },
+ { "INT33C4", (kernel_ulong_t)&dw8250_dw_apb },
+ { "INT33C5", (kernel_ulong_t)&dw8250_dw_apb },
+ { "INT3434", (kernel_ulong_t)&dw8250_dw_apb },
+ { "INT3435", (kernel_ulong_t)&dw8250_dw_apb },
{ },
};
MODULE_DEVICE_TABLE(acpi, dw8250_acpi_match);
diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c
index 8f32fe9e149e9..b9cdc5552b0d0 100644
--- a/drivers/tty/serial/8250/8250_port.c
+++ b/drivers/tty/serial/8250/8250_port.c
@@ -1949,7 +1949,7 @@ int serial8250_handle_irq(struct uart_port *port, unsigned int iir)
if ((status & UART_LSR_THRE) && (up->ier & UART_IER_THRI)) {
if (!up->dma || up->dma->tx_err)
serial8250_tx_chars(up);
- else
+ else if (!up->dma->tx_running)
__stop_tx(up);
}
diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c
index 97ef41cb2721d..16a21422ddce3 100644
--- a/drivers/tty/serial/amba-pl011.c
+++ b/drivers/tty/serial/amba-pl011.c
@@ -1367,6 +1367,15 @@ static void pl011_stop_rx(struct uart_port *port)
pl011_dma_rx_stop(uap);
}
+static void pl011_throttle_rx(struct uart_port *port)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&port->lock, flags);
+ pl011_stop_rx(port);
+ spin_unlock_irqrestore(&port->lock, flags);
+}
+
static void pl011_enable_ms(struct uart_port *port)
{
struct uart_amba_port *uap =
@@ -1788,9 +1797,10 @@ static int pl011_allocate_irq(struct uart_amba_port *uap)
*/
static void pl011_enable_interrupts(struct uart_amba_port *uap)
{
+ unsigned long flags;
unsigned int i;
- spin_lock_irq(&uap->port.lock);
+ spin_lock_irqsave(&uap->port.lock, flags);
/* Clear out any spuriously appearing RX interrupts */
pl011_write(UART011_RTIS | UART011_RXIS, uap, REG_ICR);
@@ -1812,7 +1822,14 @@ static void pl011_enable_interrupts(struct uart_amba_port *uap)
if (!pl011_dma_rx_running(uap))
uap->im |= UART011_RXIM;
pl011_write(uap->im, uap, REG_IMSC);
- spin_unlock_irq(&uap->port.lock);
+ spin_unlock_irqrestore(&uap->port.lock, flags);
+}
+
+static void pl011_unthrottle_rx(struct uart_port *port)
+{
+ struct uart_amba_port *uap = container_of(port, struct uart_amba_port, port);
+
+ pl011_enable_interrupts(uap);
}
static int pl011_startup(struct uart_port *port)
@@ -2225,6 +2242,8 @@ static const struct uart_ops amba_pl011_pops = {
.stop_tx = pl011_stop_tx,
.start_tx = pl011_start_tx,
.stop_rx = pl011_stop_rx,
+ .throttle = pl011_throttle_rx,
+ .unthrottle = pl011_unthrottle_rx,
.enable_ms = pl011_enable_ms,
.break_ctl = pl011_break_ctl,
.startup = pl011_startup,
diff --git a/drivers/tty/serial/samsung_tty.c b/drivers/tty/serial/samsung_tty.c
index d5ca904def345..1afe47b62ad56 100644
--- a/drivers/tty/serial/samsung_tty.c
+++ b/drivers/tty/serial/samsung_tty.c
@@ -377,8 +377,7 @@ static void enable_tx_dma(struct s3c24xx_uart_port *ourport)
/* Enable tx dma mode */
ucon = rd_regl(port, S3C2410_UCON);
ucon &= ~(S3C64XX_UCON_TXBURST_MASK | S3C64XX_UCON_TXMODE_MASK);
- ucon |= (dma_get_cache_alignment() >= 16) ?
- S3C64XX_UCON_TXBURST_16 : S3C64XX_UCON_TXBURST_1;
+ ucon |= S3C64XX_UCON_TXBURST_1;
ucon |= S3C64XX_UCON_TXMODE_DMA;
wr_regl(port, S3C2410_UCON, ucon);
@@ -674,7 +673,7 @@ static void enable_rx_dma(struct s3c24xx_uart_port *ourport)
S3C64XX_UCON_DMASUS_EN |
S3C64XX_UCON_TIMEOUT_EN |
S3C64XX_UCON_RXMODE_MASK);
- ucon |= S3C64XX_UCON_RXBURST_16 |
+ ucon |= S3C64XX_UCON_RXBURST_1 |
0xf << S3C64XX_UCON_TIMEOUT_SHIFT |
S3C64XX_UCON_EMPTYINT_EN |
S3C64XX_UCON_TIMEOUT_EN |
diff --git a/include/uapi/linux/tty.h b/include/uapi/linux/tty.h
index 9d0f06bfbac3e..68aeae2addeca 100644
--- a/include/uapi/linux/tty.h
+++ b/include/uapi/linux/tty.h
@@ -38,8 +38,9 @@
#define N_NULL 27 /* Null ldisc used for error handling */
#define N_MCTP 28 /* MCTP-over-serial */
#define N_DEVELOPMENT 29 /* Manual out-of-tree testing */
+#define N_CAN327 30 /* ELM327 based OBD-II interfaces */
/* Always the newest line discipline + 1 */
-#define NR_LDISCS 30
+#define NR_LDISCS 31
#endif /* _UAPI_LINUX_TTY_H */
generated by cgit 1.3-korg (git 2.53.0) at 2026-05-01 23:04:24 +0000