Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
Merge tag 'tty-4.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Pull serial driver fixes from Greg KH:
"Here are some small serial driver fixes for 4.8-rc5. One fixes an
oft-reported build issue with the fintek driver, another reverts a
patch that was causing problems, one fixes a crash, and some new
device ids were added.
All of these have been in linux-next for a while"
* tag 'tty-4.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
serial: 8250: added acces i/o products quad and octal serial cards
serial: 8250_mid: fix divide error bug if baud rate is 0
Revert "tty/serial/8250: use mctrl_gpio helpers"
8250/fintek: rename IRQ_MODE macro
+159
-90
-19
Documentation/devicetree/bindings/serial/8250.txt
-19
Documentation/devicetree/bindings/serial/8250.txt
···
42
42
- auto-flow-control: one way to enable automatic flow control support. The
43
43
driver is allowed to detect support for the capability even without this
44
44
property.
45
-
- {rts,cts,dtr,dsr,rng,dcd}-gpios: specify a GPIO for RTS/CTS/DTR/DSR/RI/DCD
46
-
line respectively. It will use specified GPIO instead of the peripheral
47
-
function pin for the UART feature. If unsure, don't specify this property.
48
45
49
46
Note:
50
47
* fsl,ns16550:
···
62
65
clock-frequency = <3686400>;
63
66
interrupts = <10>;
64
67
reg-shift = <2>;
65
-
};
66
-
67
-
Example for OMAP UART using GPIO-based modem control signals:
68
-
69
-
uart4: serial@49042000 {
70
-
compatible = "ti,omap3-uart";
71
-
reg = <0x49042000 0x400>;
72
-
interrupts = <80>;
73
-
ti,hwmods = "uart4";
74
-
clock-frequency = <48000000>;
75
-
cts-gpios = <&gpio3 5 GPIO_ACTIVE_LOW>;
76
-
rts-gpios = <&gpio3 6 GPIO_ACTIVE_LOW>;
77
-
dtr-gpios = <&gpio1 12 GPIO_ACTIVE_LOW>;
78
-
dsr-gpios = <&gpio1 13 GPIO_ACTIVE_LOW>;
79
-
dcd-gpios = <&gpio1 14 GPIO_ACTIVE_LOW>;
80
-
rng-gpios = <&gpio1 15 GPIO_ACTIVE_LOW>;
81
68
};
+1
-34
drivers/tty/serial/8250/8250.h
+1
-34
drivers/tty/serial/8250/8250.h
···
15
15
#include <linux/serial_reg.h>
16
16
#include <linux/dmaengine.h>
17
17
18
-
#include "../serial_mctrl_gpio.h"
19
-
20
18
struct uart_8250_dma {
21
19
int (*tx_dma)(struct uart_8250_port *p);
22
20
int (*rx_dma)(struct uart_8250_port *p);
···
131
133
132
134
static inline void serial8250_out_MCR(struct uart_8250_port *up, int value)
133
135
{
134
-
int mctrl_gpio = 0;
135
-
136
136
serial_out(up, UART_MCR, value);
137
-
138
-
if (value & UART_MCR_RTS)
139
-
mctrl_gpio |= TIOCM_RTS;
140
-
if (value & UART_MCR_DTR)
141
-
mctrl_gpio |= TIOCM_DTR;
142
-
143
-
mctrl_gpio_set(up->gpios, mctrl_gpio);
144
137
}
145
138
146
139
static inline int serial8250_in_MCR(struct uart_8250_port *up)
147
140
{
148
-
int mctrl, mctrl_gpio = 0;
149
-
150
-
mctrl = serial_in(up, UART_MCR);
151
-
152
-
/* save current MCR values */
153
-
if (mctrl & UART_MCR_RTS)
154
-
mctrl_gpio |= TIOCM_RTS;
155
-
if (mctrl & UART_MCR_DTR)
156
-
mctrl_gpio |= TIOCM_DTR;
157
-
158
-
mctrl_gpio = mctrl_gpio_get_outputs(up->gpios, &mctrl_gpio);
159
-
160
-
if (mctrl_gpio & TIOCM_RTS)
161
-
mctrl |= UART_MCR_RTS;
162
-
else
163
-
mctrl &= ~UART_MCR_RTS;
164
-
165
-
if (mctrl_gpio & TIOCM_DTR)
166
-
mctrl |= UART_MCR_DTR;
167
-
else
168
-
mctrl &= ~UART_MCR_DTR;
169
-
170
-
return mctrl;
141
+
return serial_in(up, UART_MCR);
171
142
}
172
143
173
144
#if defined(__alpha__) && !defined(CONFIG_PCI)
-9
drivers/tty/serial/8250/8250_core.c
-9
drivers/tty/serial/8250/8250_core.c
···
974
974
975
975
uart = serial8250_find_match_or_unused(&up->port);
976
976
if (uart && uart->port.type != PORT_8250_CIR) {
977
-
struct mctrl_gpios *gpios;
978
-
979
977
if (uart->port.dev)
980
978
uart_remove_one_port(&serial8250_reg, &uart->port);
981
979
···
1010
1012
1011
1013
if (up->port.flags & UPF_FIXED_TYPE)
1012
1014
uart->port.type = up->port.type;
1013
-
1014
-
gpios = mctrl_gpio_init(&uart->port, 0);
1015
-
if (IS_ERR(gpios)) {
1016
-
if (PTR_ERR(gpios) != -ENOSYS)
1017
-
return PTR_ERR(gpios);
1018
-
} else
1019
-
uart->gpios = gpios;
1020
1015
1021
1016
serial8250_set_defaults(uart);
1022
1017
+2
-2
drivers/tty/serial/8250/8250_fintek.c
+2
-2
drivers/tty/serial/8250/8250_fintek.c
···
31
31
#define IO_ADDR2 0x60
32
32
#define LDN 0x7
33
33
34
-
#define IRQ_MODE 0x70
34
+
#define FINTEK_IRQ_MODE 0x70
35
35
#define IRQ_SHARE BIT(4)
36
36
#define IRQ_MODE_MASK (BIT(6) | BIT(5))
37
37
#define IRQ_LEVEL_LOW 0
···
195
195
outb(LDN, pdata->base_port + ADDR_PORT);
196
196
outb(pdata->index, pdata->base_port + DATA_PORT);
197
197
198
-
outb(IRQ_MODE, pdata->base_port + ADDR_PORT);
198
+
outb(FINTEK_IRQ_MODE, pdata->base_port + ADDR_PORT);
199
199
tmp = inb(pdata->base_port + DATA_PORT);
200
200
201
201
tmp &= ~IRQ_MODE_MASK;
+3
drivers/tty/serial/8250/8250_mid.c
+3
drivers/tty/serial/8250/8250_mid.c
···
168
168
unsigned long w = BIT(24) - 1;
169
169
unsigned long mul, div;
170
170
171
+
/* Gracefully handle the B0 case: fall back to B9600 */
172
+
fuart = fuart ? fuart : 9600 * 16;
173
+
171
174
if (mid->board->freq < fuart) {
172
175
/* Find prescaler value that satisfies Fuart < Fref */
173
176
if (mid->board->freq > baud)
+13
-18
drivers/tty/serial/8250/8250_omap.c
+13
-18
drivers/tty/serial/8250/8250_omap.c
···
134
134
135
135
serial8250_do_set_mctrl(port, mctrl);
136
136
137
-
if (IS_ERR_OR_NULL(mctrl_gpio_to_gpiod(up->gpios,
138
-
UART_GPIO_RTS))) {
139
-
/*
140
-
* Turn off autoRTS if RTS is lowered and restore autoRTS
141
-
* setting if RTS is raised
142
-
*/
143
-
lcr = serial_in(up, UART_LCR);
144
-
serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B);
145
-
if ((mctrl & TIOCM_RTS) && (port->status & UPSTAT_AUTORTS))
146
-
priv->efr |= UART_EFR_RTS;
147
-
else
148
-
priv->efr &= ~UART_EFR_RTS;
149
-
serial_out(up, UART_EFR, priv->efr);
150
-
serial_out(up, UART_LCR, lcr);
151
-
}
137
+
/*
138
+
* Turn off autoRTS if RTS is lowered and restore autoRTS setting
139
+
* if RTS is raised
140
+
*/
141
+
lcr = serial_in(up, UART_LCR);
142
+
serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B);
143
+
if ((mctrl & TIOCM_RTS) && (port->status & UPSTAT_AUTORTS))
144
+
priv->efr |= UART_EFR_RTS;
145
+
else
146
+
priv->efr &= ~UART_EFR_RTS;
147
+
serial_out(up, UART_EFR, priv->efr);
148
+
serial_out(up, UART_LCR, lcr);
152
149
}
153
150
154
151
/*
···
446
449
priv->efr = 0;
447
450
up->port.status &= ~(UPSTAT_AUTOCTS | UPSTAT_AUTORTS | UPSTAT_AUTOXOFF);
448
451
449
-
if (termios->c_cflag & CRTSCTS && up->port.flags & UPF_HARD_FLOW
450
-
&& IS_ERR_OR_NULL(mctrl_gpio_to_gpiod(up->gpios,
451
-
UART_GPIO_RTS))) {
452
+
if (termios->c_cflag & CRTSCTS && up->port.flags & UPF_HARD_FLOW) {
452
453
/* Enable AUTOCTS (autoRTS is enabled when RTS is raised) */
453
454
up->port.status |= UPSTAT_AUTOCTS | UPSTAT_AUTORTS;
454
455
priv->efr |= UART_EFR_CTS;
+139
drivers/tty/serial/8250/8250_pci.c
+139
drivers/tty/serial/8250/8250_pci.c
···
1950
1950
#define PCI_DEVICE_ID_PERICOM_PI7C9X7954 0x7954
1951
1951
#define PCI_DEVICE_ID_PERICOM_PI7C9X7958 0x7958
1952
1952
1953
+
#define PCI_VENDOR_ID_ACCESIO 0x494f
1954
+
#define PCI_DEVICE_ID_ACCESIO_PCIE_COM_2SDB 0x1051
1955
+
#define PCI_DEVICE_ID_ACCESIO_MPCIE_COM_2S 0x1053
1956
+
#define PCI_DEVICE_ID_ACCESIO_PCIE_COM_4SDB 0x105C
1957
+
#define PCI_DEVICE_ID_ACCESIO_MPCIE_COM_4S 0x105E
1958
+
#define PCI_DEVICE_ID_ACCESIO_PCIE_COM232_2DB 0x1091
1959
+
#define PCI_DEVICE_ID_ACCESIO_MPCIE_COM232_2 0x1093
1960
+
#define PCI_DEVICE_ID_ACCESIO_PCIE_COM232_4DB 0x1099
1961
+
#define PCI_DEVICE_ID_ACCESIO_MPCIE_COM232_4 0x109B
1962
+
#define PCI_DEVICE_ID_ACCESIO_PCIE_COM_2SMDB 0x10D1
1963
+
#define PCI_DEVICE_ID_ACCESIO_MPCIE_COM_2SM 0x10D3
1964
+
#define PCI_DEVICE_ID_ACCESIO_PCIE_COM_4SMDB 0x10DA
1965
+
#define PCI_DEVICE_ID_ACCESIO_MPCIE_COM_4SM 0x10DC
1966
+
#define PCI_DEVICE_ID_ACCESIO_MPCIE_ICM485_1 0x1108
1967
+
#define PCI_DEVICE_ID_ACCESIO_MPCIE_ICM422_2 0x1110
1968
+
#define PCI_DEVICE_ID_ACCESIO_MPCIE_ICM485_2 0x1111
1969
+
#define PCI_DEVICE_ID_ACCESIO_MPCIE_ICM422_4 0x1118
1970
+
#define PCI_DEVICE_ID_ACCESIO_MPCIE_ICM485_4 0x1119
1971
+
#define PCI_DEVICE_ID_ACCESIO_PCIE_ICM_2S 0x1152
1972
+
#define PCI_DEVICE_ID_ACCESIO_PCIE_ICM_4S 0x115A
1973
+
#define PCI_DEVICE_ID_ACCESIO_PCIE_ICM232_2 0x1190
1974
+
#define PCI_DEVICE_ID_ACCESIO_MPCIE_ICM232_2 0x1191
1975
+
#define PCI_DEVICE_ID_ACCESIO_PCIE_ICM232_4 0x1198
1976
+
#define PCI_DEVICE_ID_ACCESIO_MPCIE_ICM232_4 0x1199
1977
+
#define PCI_DEVICE_ID_ACCESIO_PCIE_ICM_2SM 0x11D0
1978
+
#define PCI_DEVICE_ID_ACCESIO_PCIE_COM422_4 0x105A
1979
+
#define PCI_DEVICE_ID_ACCESIO_PCIE_COM485_4 0x105B
1980
+
#define PCI_DEVICE_ID_ACCESIO_PCIE_COM422_8 0x106A
1981
+
#define PCI_DEVICE_ID_ACCESIO_PCIE_COM485_8 0x106B
1982
+
#define PCI_DEVICE_ID_ACCESIO_PCIE_COM232_4 0x1098
1983
+
#define PCI_DEVICE_ID_ACCESIO_PCIE_COM232_8 0x10A9
1984
+
#define PCI_DEVICE_ID_ACCESIO_PCIE_COM_4SM 0x10D9
1985
+
#define PCI_DEVICE_ID_ACCESIO_PCIE_COM_8SM 0x10E9
1986
+
#define PCI_DEVICE_ID_ACCESIO_PCIE_ICM_4SM 0x11D8
1987
+
1988
+
1989
+
1953
1990
/* Unknown vendors/cards - this should not be in linux/pci_ids.h */
1954
1991
#define PCI_SUBDEVICE_ID_UNKNOWN_0x1584 0x1584
1955
1992
#define PCI_SUBDEVICE_ID_UNKNOWN_0x1588 0x1588
···
5149
5112
PCI_ANY_ID, PCI_ANY_ID,
5150
5113
0,
5151
5114
0, pbn_pericom_PI7C9X7958 },
5115
+
/*
5116
+
* ACCES I/O Products quad
5117
+
*/
5118
+
{ PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_COM_2SDB,
5119
+
PCI_ANY_ID, PCI_ANY_ID, 0, 0,
5120
+
pbn_pericom_PI7C9X7954 },
5121
+
{ PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_MPCIE_COM_2S,
5122
+
PCI_ANY_ID, PCI_ANY_ID, 0, 0,
5123
+
pbn_pericom_PI7C9X7954 },
5124
+
{ PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_COM_4SDB,
5125
+
PCI_ANY_ID, PCI_ANY_ID, 0, 0,
5126
+
pbn_pericom_PI7C9X7954 },
5127
+
{ PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_MPCIE_COM_4S,
5128
+
PCI_ANY_ID, PCI_ANY_ID, 0, 0,
5129
+
pbn_pericom_PI7C9X7954 },
5130
+
{ PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_COM232_2DB,
5131
+
PCI_ANY_ID, PCI_ANY_ID, 0, 0,
5132
+
pbn_pericom_PI7C9X7954 },
5133
+
{ PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_MPCIE_COM232_2,
5134
+
PCI_ANY_ID, PCI_ANY_ID, 0, 0,
5135
+
pbn_pericom_PI7C9X7954 },
5136
+
{ PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_COM232_4DB,
5137
+
PCI_ANY_ID, PCI_ANY_ID, 0, 0,
5138
+
pbn_pericom_PI7C9X7954 },
5139
+
{ PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_MPCIE_COM232_4,
5140
+
PCI_ANY_ID, PCI_ANY_ID, 0, 0,
5141
+
pbn_pericom_PI7C9X7954 },
5142
+
{ PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_COM_2SMDB,
5143
+
PCI_ANY_ID, PCI_ANY_ID, 0, 0,
5144
+
pbn_pericom_PI7C9X7954 },
5145
+
{ PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_MPCIE_COM_2SM,
5146
+
PCI_ANY_ID, PCI_ANY_ID, 0, 0,
5147
+
pbn_pericom_PI7C9X7954 },
5148
+
{ PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_COM_4SMDB,
5149
+
PCI_ANY_ID, PCI_ANY_ID, 0, 0,
5150
+
pbn_pericom_PI7C9X7954 },
5151
+
{ PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_MPCIE_COM_4SM,
5152
+
PCI_ANY_ID, PCI_ANY_ID, 0, 0,
5153
+
pbn_pericom_PI7C9X7954 },
5154
+
{ PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_MPCIE_ICM485_1,
5155
+
PCI_ANY_ID, PCI_ANY_ID, 0, 0,
5156
+
pbn_pericom_PI7C9X7954 },
5157
+
{ PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_MPCIE_ICM422_2,
5158
+
PCI_ANY_ID, PCI_ANY_ID, 0, 0,
5159
+
pbn_pericom_PI7C9X7954 },
5160
+
{ PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_MPCIE_ICM485_2,
5161
+
PCI_ANY_ID, PCI_ANY_ID, 0, 0,
5162
+
pbn_pericom_PI7C9X7954 },
5163
+
{ PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_MPCIE_ICM422_4,
5164
+
PCI_ANY_ID, PCI_ANY_ID, 0, 0,
5165
+
pbn_pericom_PI7C9X7954 },
5166
+
{ PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_MPCIE_ICM485_4,
5167
+
PCI_ANY_ID, PCI_ANY_ID, 0, 0,
5168
+
pbn_pericom_PI7C9X7954 },
5169
+
{ PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_ICM_2S,
5170
+
PCI_ANY_ID, PCI_ANY_ID, 0, 0,
5171
+
pbn_pericom_PI7C9X7954 },
5172
+
{ PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_ICM_4S,
5173
+
PCI_ANY_ID, PCI_ANY_ID, 0, 0,
5174
+
pbn_pericom_PI7C9X7954 },
5175
+
{ PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_ICM232_2,
5176
+
PCI_ANY_ID, PCI_ANY_ID, 0, 0,
5177
+
pbn_pericom_PI7C9X7954 },
5178
+
{ PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_MPCIE_ICM232_2,
5179
+
PCI_ANY_ID, PCI_ANY_ID, 0, 0,
5180
+
pbn_pericom_PI7C9X7954 },
5181
+
{ PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_ICM232_4,
5182
+
PCI_ANY_ID, PCI_ANY_ID, 0, 0,
5183
+
pbn_pericom_PI7C9X7954 },
5184
+
{ PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_MPCIE_ICM232_4,
5185
+
PCI_ANY_ID, PCI_ANY_ID, 0, 0,
5186
+
pbn_pericom_PI7C9X7954 },
5187
+
{ PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_ICM_2SM,
5188
+
PCI_ANY_ID, PCI_ANY_ID, 0, 0,
5189
+
pbn_pericom_PI7C9X7954 },
5190
+
{ PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_COM422_4,
5191
+
PCI_ANY_ID, PCI_ANY_ID, 0, 0,
5192
+
pbn_pericom_PI7C9X7958 },
5193
+
{ PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_COM485_4,
5194
+
PCI_ANY_ID, PCI_ANY_ID, 0, 0,
5195
+
pbn_pericom_PI7C9X7958 },
5196
+
{ PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_COM422_8,
5197
+
PCI_ANY_ID, PCI_ANY_ID, 0, 0,
5198
+
pbn_pericom_PI7C9X7958 },
5199
+
{ PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_COM485_8,
5200
+
PCI_ANY_ID, PCI_ANY_ID, 0, 0,
5201
+
pbn_pericom_PI7C9X7958 },
5202
+
{ PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_COM232_4,
5203
+
PCI_ANY_ID, PCI_ANY_ID, 0, 0,
5204
+
pbn_pericom_PI7C9X7958 },
5205
+
{ PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_COM232_8,
5206
+
PCI_ANY_ID, PCI_ANY_ID, 0, 0,
5207
+
pbn_pericom_PI7C9X7958 },
5208
+
{ PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_COM_4SM,
5209
+
PCI_ANY_ID, PCI_ANY_ID, 0, 0,
5210
+
pbn_pericom_PI7C9X7958 },
5211
+
{ PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_COM_8SM,
5212
+
PCI_ANY_ID, PCI_ANY_ID, 0, 0,
5213
+
pbn_pericom_PI7C9X7958 },
5214
+
{ PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_ICM_4SM,
5215
+
PCI_ANY_ID, PCI_ANY_ID, 0, 0,
5216
+
pbn_pericom_PI7C9X7958 },
5152
5217
/*
5153
5218
* Topic TP560 Data/Fax/Voice 56k modem (reported by Evan Clarke)
5154
5219
*/
+1
-6
drivers/tty/serial/8250/8250_port.c
+1
-6
drivers/tty/serial/8250/8250_port.c
···
1618
1618
if (up->bugs & UART_BUG_NOMSR)
1619
1619
return;
1620
1620
1621
-
mctrl_gpio_disable_ms(up->gpios);
1622
-
1623
1621
up->ier &= ~UART_IER_MSI;
1624
1622
serial_port_out(port, UART_IER, up->ier);
1625
1623
}
···
1629
1631
/* no MSR capabilities */
1630
1632
if (up->bugs & UART_BUG_NOMSR)
1631
1633
return;
1632
-
1633
-
mctrl_gpio_enable_ms(up->gpios);
1634
1634
1635
1635
up->ier |= UART_IER_MSI;
1636
1636
···
1913
1917
ret |= TIOCM_DSR;
1914
1918
if (status & UART_MSR_CTS)
1915
1919
ret |= TIOCM_CTS;
1916
-
1917
-
return mctrl_gpio_get(up->gpios, &ret);
1920
+
return ret;
1918
1921
}
1919
1922
EXPORT_SYMBOL_GPL(serial8250_do_get_mctrl);
1920
1923
-1
drivers/tty/serial/8250/Kconfig
-1
drivers/tty/serial/8250/Kconfig
···
6
6
config SERIAL_8250
7
7
tristate "8250/16550 and compatible serial support"
8
8
select SERIAL_CORE
9
-
select SERIAL_MCTRL_GPIO if GPIOLIB
10
9
---help---
11
10
This selects whether you want to include the driver for the standard
12
11
serial ports. The standard answer is Y. People who might say N