| From: |
| Manikanta Guntupalli <manikanta.guntupalli-AT-amd.com> |
| To: |
| <git-AT-amd.com>, <michal.simek-AT-amd.com>, <gregkh-AT-linuxfoundation.org>, <robh+dt-AT-kernel.org>, <krzysztof.kozlowski+dt-AT-linaro.org>, <conor+dt-AT-kernel.org>, <linux-serial-AT-vger.kernel.org>, <devicetree-AT-vger.kernel.org>, <linux-kernel-AT-vger.kernel.org>, <jirislaby-AT-kernel.org>, <linux-arm-kernel-AT-lists.infradead.org> |
| Subject: |
| [PATCH V3 0/2] Add rs485 support to uartps driver |
| Date: |
| Tue, 24 Oct 2023 20:18:45 +0530 |
| Message-ID: |
| <20231024144847.2316941-1-manikanta.guntupalli@amd.com> |
| Cc: |
| <radhey.shyam.pandey-AT-amd.com>, <srinivas.goud-AT-amd.com>, <shubhrajyoti.datta-AT-amd.com>, <manion05gk-AT-gmail.com>, Manikanta Guntupalli <manikanta.guntupalli-AT-amd.com> |
| Archive-link: |
| Article |
Add optional gpio property to uartps node to support rs485.
Add rs485 support to uartps driver.
---
Changes for V2:
Modify optional gpio name to xlnx,phy-ctrl-gpios.
Update commit description.
Add support for RTS, delay_rts_before_send and delay_rts_after_send in RS485 mode.
Changes for V3:
Modify optional gpio name to rts-gpios.
Update commit description.
Move cdns_uart_tx_empty function to avoid prototype statement.
Remove assignment of struct serial_rs485 to port->rs485 as
serial core performs that.
Switch to native RTS in non GPIO case.
Handle rs485 during stop tx.
Remove explicit calls to configure gpio direction and value,
as devm_gpiod_get_optional performs that by using GPIOD_OUT_LOW argument.
Update implementation to support configuration of GPIO/RTS value
based on user configuration of SER_RS485_RTS_ON_SEND and
SER_RS485_RTS_AFTER_SEND. Move implementation to start_tx from handle_tx.
Manikanta Guntupalli (2):
dt-bindings: Add optional gpio property to uartps node to support
rs485
tty: serial: uartps: Add rs485 support to uartps driver
.../devicetree/bindings/serial/cdns,uart.yaml | 6 +
drivers/tty/serial/xilinx_uartps.c | 180 ++++++++++++++++--
2 files changed, 171 insertions(+), 15 deletions(-)
--
2.25.1
