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/openbmc/linux/Documentation/devicetree/bindings/serial/
H A Drs485.yaml4 $id: http://devicetree.org/schemas/serial/rs485.yaml#
7 title: RS485 serial communications
17 rs485-rts-delay:
31 rs485-rts-active-high:
35 rs485-rts-active-low:
39 rs485-rx-active-high:
44 linux,rs485-enabled-at-boot-time:
45 description: enables the rs485 feature at boot time. It can be disabled
49 rs485-rx-during-tx:
53 rs485-term-gpios:
[all …]
/openbmc/linux/drivers/tty/serial/8250/
H A D8250_dwlib.c17 #define DW_UART_TCR 0xac /* Transceiver Control Register (RS485) */
138 static void dw8250_rs485_set_addr(struct uart_port *p, struct serial_rs485 *rs485, in dw8250_rs485_set_addr() argument
143 if (rs485->flags & SER_RS485_ADDRB) { in dw8250_rs485_set_addr()
148 if (rs485->flags & SER_RS485_ADDR_RECV) { in dw8250_rs485_set_addr()
149 u32 delta = p->rs485.flags ^ rs485->flags; in dw8250_rs485_set_addr()
152 * rs485 (param) is equal to uart_port's rs485 only during init in dw8250_rs485_set_addr()
155 if (unlikely(&p->rs485 == rs485)) in dw8250_rs485_set_addr()
156 delta = rs485->flags; in dw8250_rs485_set_addr()
159 (p->rs485.addr_recv != rs485->addr_recv)) in dw8250_rs485_set_addr()
160 dw8250_update_rar(p, rs485->addr_recv); in dw8250_rs485_set_addr()
[all …]
H A D8250_fintek.c51 #define RS485 0xF0 macro
198 struct serial_rs485 *rs485) in fintek_8250_rs485_config() argument
207 if (rs485->flags & SER_RS485_ENABLED) { in fintek_8250_rs485_config()
209 if (!(rs485->flags & SER_RS485_RTS_ON_SEND) == in fintek_8250_rs485_config()
210 !(rs485->flags & SER_RS485_RTS_AFTER_SEND)) in fintek_8250_rs485_config()
215 if (rs485->delay_rts_before_send) { in fintek_8250_rs485_config()
216 rs485->delay_rts_before_send = 1; in fintek_8250_rs485_config()
220 if (rs485->delay_rts_after_send) { in fintek_8250_rs485_config()
221 rs485->delay_rts_after_send = 1; in fintek_8250_rs485_config()
225 if (rs485->flags & SER_RS485_RTS_ON_SEND) in fintek_8250_rs485_config()
[all …]
H A D8250_lpc18xx.c36 struct serial_rs485 *rs485) in lpc18xx_rs485_config() argument
43 if (rs485->flags & SER_RS485_ENABLED) { in lpc18xx_rs485_config()
47 if (rs485->flags & SER_RS485_RTS_ON_SEND) in lpc18xx_rs485_config()
51 if (rs485->delay_rts_after_send) { in lpc18xx_rs485_config()
53 rs485_dly_reg = DIV_ROUND_UP(rs485->delay_rts_after_send in lpc18xx_rs485_config()
60 rs485->delay_rts_after_send = (rs485_dly_reg * MSEC_PER_SEC) in lpc18xx_rs485_config()
H A D8250_bcm2835aux.c12 * simultaneously to rs485.
54 if (!(up->port.rs485.flags & SER_RS485_RX_DURING_TX)) { in bcm2835aux_rs485_start_tx()
65 if (up->port.rs485.flags & SER_RS485_RTS_ON_SEND) in bcm2835aux_rs485_start_tx()
73 if (up->port.rs485.flags & SER_RS485_RTS_AFTER_SEND) in bcm2835aux_rs485_stop_tx()
78 if (!(up->port.rs485.flags & SER_RS485_RX_DURING_TX)) { in bcm2835aux_rs485_stop_tx()
/openbmc/linux/Documentation/driver-api/serial/
H A Dserial-rs485.rst2 RS485 Serial Communications
21 half-duplex hardware like an RS485 transceiver or any RS232-connected
32 The Linux kernel provides the struct serial_rs485 to handle RS485
33 communications. This data structure is used to set and configure RS485
36 The device tree can also provide RS485 boot time parameters
41 Any driver for devices capable of working both as RS232 and RS485 should
48 what RS485 features the driver supports for the ``struct uart_port``.
58 From user-level, RS485 configuration can be get/set using the previous
59 ioctls. For instance, to set RS485 you can use the following code::
63 /* Include definition for RS485 ioctls: TIOCGRS485 and TIOCSRS485 */
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/openbmc/linux/arch/arm/boot/dts/microchip/
H A Daks-cdu.dts32 linux,rs485-enabled-at-boot-time;
33 rs485-rts-delay = <0 0>;
38 linux,rs485-enabled-at-boot-time;
39 rs485-rts-delay = <0 0>;
44 linux,rs485-enabled-at-boot-time;
45 rs485-rts-delay = <0 0>;
/openbmc/linux/include/uapi/linux/
H A Dserial.h111 * struct serial_rs485 - serial interface for controlling RS485 settings.
112 * @flags: RS485 feature flags.
115 * @addr_recv: Receive filter for RS485 addressing mode
117 * @addr_dest: Destination address for RS485 addressing mode
125 * Serial interface for controlling RS485 settings on chips with suitable
132 * * %SER_RS485_ENABLED - RS485 enabled.
135 * * %SER_RS485_RX_DURING_TX - Full-duplex RS485 line.
137 * * %SER_RS485_ADDRB - Enable RS485 addressing mode.
/openbmc/linux/arch/arm/boot/dts/nxp/mxs/
H A Dimx28-duckbill-2-485.dts15 rs485-red {
16 label = "duckbill:red:rs485";
20 rs485-green {
21 label = "duckbill:green:rs485";
/openbmc/linux/drivers/usb/serial/
H A Dxr_serial.c241 struct serial_rs485 rs485; member
651 rs485_enabled = !!(data->rs485.flags & SER_RS485_ENABLED); in xr_set_flow_mode()
655 if (data->rs485.flags & SER_RS485_RTS_ON_SEND) in xr_set_flow_mode()
825 static void xr_sanitize_serial_rs485(struct serial_rs485 *rs485) in xr_sanitize_serial_rs485() argument
827 if (!(rs485->flags & SER_RS485_ENABLED)) { in xr_sanitize_serial_rs485()
828 memset(rs485, 0, sizeof(*rs485)); in xr_sanitize_serial_rs485()
833 if (rs485->flags & SER_RS485_RTS_ON_SEND) in xr_sanitize_serial_rs485()
834 rs485->flags &= ~SER_RS485_RTS_AFTER_SEND; in xr_sanitize_serial_rs485()
836 rs485->flags |= SER_RS485_RTS_AFTER_SEND; in xr_sanitize_serial_rs485()
839 rs485->flags &= SER_RS485_ENABLED | SER_RS485_RTS_ON_SEND | in xr_sanitize_serial_rs485()
[all …]
/openbmc/linux/arch/arm/boot/dts/ti/omap/
H A Dam335x-nano.dts171 rs485-rts-active-high;
172 rs485-rx-during-tx;
173 rs485-rts-delay = <1 1>;
174 linux,rs485-enabled-at-boot-time;
182 rs485-rts-active-high;
183 rs485-rts-delay = <1 1>;
184 linux,rs485-enabled-at-boot-time;
191 rs485-rts-active-high;
192 rs485-rx-during-tx;
193 rs485-rts-delay = <1 1>;
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/openbmc/linux/drivers/tty/serial/
H A Dserial_core.c185 if (old != port->mctrl && !(port->rs485.flags & SER_RS485_ENABLED)) in uart_update_mctrl()
1327 static int uart_check_rs485_flags(struct uart_port *port, struct serial_rs485 *rs485) in uart_check_rs485_flags() argument
1329 u32 flags = rs485->flags; in uart_check_rs485_flags()
1342 if (!(rs485->flags & SER_RS485_ADDRB) && in uart_check_rs485_flags()
1343 (rs485->flags & (SER_RS485_ADDR_RECV|SER_RS485_ADDR_DEST))) in uart_check_rs485_flags()
1347 if (!(rs485->flags & SER_RS485_ADDR_RECV) && rs485->addr_recv) in uart_check_rs485_flags()
1349 if (!(rs485->flags & SER_RS485_ADDR_DEST) && rs485->addr_dest) in uart_check_rs485_flags()
1356 struct serial_rs485 *rs485) in uart_sanitize_serial_rs485_delays() argument
1359 if (rs485->delay_rts_before_send) { in uart_sanitize_serial_rs485_delays()
1364 rs485->delay_rts_before_send = 0; in uart_sanitize_serial_rs485_delays()
[all …]
H A Domap-serial.c285 if (port->rs485.flags & SER_RS485_ENABLED) { in serial_omap_stop_tx()
296 res = (port->rs485.flags & SER_RS485_RTS_AFTER_SEND) ? in serial_omap_stop_tx()
299 if (port->rs485.delay_rts_after_send > 0) in serial_omap_stop_tx()
301 port->rs485.delay_rts_after_send); in serial_omap_stop_tx()
338 if ((up->port.rs485.flags & SER_RS485_ENABLED) && in serial_omap_put_char()
339 !(up->port.rs485.flags & SER_RS485_RX_DURING_TX)) in serial_omap_put_char()
367 if (port->rs485.flags & SER_RS485_ENABLED) { in serial_omap_start_tx()
373 res = (port->rs485.flags & SER_RS485_RTS_ON_SEND) ? 1 : 0; in serial_omap_start_tx()
376 if (port->rs485.delay_rts_before_send > 0) in serial_omap_start_tx()
377 mdelay(port->rs485.delay_rts_before_send); in serial_omap_start_tx()
[all …]
/openbmc/linux/arch/arm/boot/dts/nxp/imx/
H A Dimx6qdl-dhcom-drc02.dtsi30 rs485-rx-en-hog {
33 line-name = "rs485-rx-en";
85 * On DRC02 this UART is used as RS485 interface and RS485_TX_En is
92 linux,rs485-enabled-at-boot-time;
122 * P: uart5 rs485-tx-en
123 * Q: uart5 rs485-rx-en
H A Dimx6ull-dhcom-drc02.dts59 rs485-rx-en-hog {
62 line-name = "rs485-rx-en";
94 /* Use UART as RS485 */
97 linux,rs485-enabled-at-boot-time;
/openbmc/linux/arch/arm64/boot/dts/freescale/
H A Dimx8mm-venice-gw72xx-0x-rs422.dtso5 * GW72xx RS422 (RS485 full duplex):
9 * - UART4_TX is DE for RS485 transmitter
45 linux,rs485-enabled-at-boot-time;
H A Dimx8mm-venice-gw72xx-0x-rs485.dtso5 * GW72xx RS485 HD:
9 * - UART4_TX is DE for RS485 transmitter
45 linux,rs485-enabled-at-boot-time;
H A Dimx8mm-venice-gw73xx-0x-rs485.dtso5 * GW73xx RS485 HD:
9 * - UART4_TX is DE for RS485 transmitter
45 linux,rs485-enabled-at-boot-time;
H A Dimx8mm-venice-gw73xx-0x-rs422.dtso5 * GW73xx RS422 (RS485 full duplex):
9 * - UART4_TX is DE for RS485 transmitter
45 linux,rs485-enabled-at-boot-time;
H A Dimx8mm-verdin-dev.dtsi131 /* Verdin UART_1, connector X50 through RS485 transceiver */
133 linux,rs485-enabled-at-boot-time;
134 rs485-rts-active-low;
135 rs485-rx-during-tx;
H A Dimx8mp-verdin-dev.dtsi171 /* Verdin UART_1, connector X50 through RS485 transceiver */
173 linux,rs485-enabled-at-boot-time;
174 rs485-rts-active-low;
175 rs485-rx-during-tx;
H A DMakefile156 imx8mm-venice-gw72xx-0x-rs485-dtbs := imx8mm-venice-gw72xx-0x.dtb imx8mm-venice-gw72xx-0x-rs485.dtbo
161 imx8mm-venice-gw73xx-0x-rs485-dtbs := imx8mm-venice-gw73xx-0x.dtb imx8mm-venice-gw73xx-0x-rs485.dtbo
168 dtb-$(CONFIG_ARCH_MXC) += imx8mm-venice-gw72xx-0x-rs485.dtb
173 dtb-$(CONFIG_ARCH_MXC) += imx8mm-venice-gw73xx-0x-rs485.dtb
/openbmc/bmcweb/redfish-core/include/generated/enums/
H A Dserial_interface.hpp13 Rs485, enumerator
42 {SignalType::Rs485, "Rs485"},
/openbmc/linux/arch/arm/boot/dts/st/
H A Dstm32mp15xx-dhcom-drc02.dtsi24 rs485-rx-en-hog {
28 line-name = "rs485-rx-en";
132 &uart8 { /* RS485 */
133 linux,rs485-enabled-at-boot-time;
/openbmc/openbmc/meta-facebook/meta-minerva/recipes-phosphor/initrdscripts/phosphor-static-norootfs-init/
H A D99-platform-init25 # One is Modbus (RS485) interface connected to FT4232H channel 1, 2.
31 # D_485_x = End device for smart valve x via RS485
40 # X (RS485) RS232 +-------------+

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