diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2022-06-03 21:08:40 +0300 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2022-06-03 21:08:40 +0300 |
commit | 932c2989b59008e530ffcc7c7e6ef507a28b28ca (patch) | |
tree | 5d51787f2ace2b9a2fd2393662818fd14aa219be /drivers/tty/serial/xilinx_uartps.c | |
parent | 4ad680f083ec360e0991c453e18a38ed9ae500d7 (diff) | |
parent | 25e02ba60f0fbe65ba07553b5b2b8867726273c4 (diff) | |
download | linux-932c2989b59008e530ffcc7c7e6ef507a28b28ca.tar.xz |
Merge tag 'tty-5.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Pull tty and serial driver updates from Greg KH:
"Here is the big set of tty and serial driver updates for 5.19-rc1.
Lots of tiny cleanups in here, the major stuff is:
- termbit cleanups and unification by Ilpo. A much needed change that
goes a long way to making things simpler for all of the different
arches
- tty documentation cleanups and movements to their own place in the
documentation tree
- old tty driver cleanups and fixes from Jiri to bring some existing
drivers into the modern world
- RS485 cleanups and unifications to make it easier for individual
drivers to support this mode instead of having to duplicate logic
in each driver
- Lots of 8250 driver updates and additions
- new device id additions
- n_gsm continued fixes and cleanups
- other minor serial driver updates and cleanups
All of these have been in linux-next for weeks with no reported issues"
* tag 'tty-5.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (166 commits)
tty: Rework receive flow control char logic
pcmcia: synclink_cs: Don't allow CS5-6
serial: stm32-usart: Correct CSIZE, bits, and parity
serial: st-asc: Sanitize CSIZE and correct PARENB for CS7
serial: sifive: Sanitize CSIZE and c_iflag
serial: sh-sci: Don't allow CS5-6
serial: txx9: Don't allow CS5-6
serial: rda-uart: Don't allow CS5-6
serial: digicolor-usart: Don't allow CS5-6
serial: uartlite: Fix BRKINT clearing
serial: cpm_uart: Fix build error without CONFIG_SERIAL_CPM_CONSOLE
serial: core: Do stop_rx in suspend path for console if console_suspend is disabled
tty: serial: qcom-geni-serial: Remove uart frequency table. Instead, find suitable frequency with call to clk_round_rate.
dt-bindings: serial: renesas,em-uart: Add RZ/V2M clock to access the registers
serial: 8250_fintek: Check SER_RS485_RTS_* only with RS485
Revert "serial: 8250_mtk: Make sure to select the right FEATURE_SEL"
serial: msm_serial: disable interrupts in __msm_console_write()
serial: meson: acquire port->lock in startup()
serial: 8250_dw: Use dev_err_probe()
serial: 8250_dw: Use devm_add_action_or_reset()
...
Diffstat (limited to 'drivers/tty/serial/xilinx_uartps.c')
-rw-r--r-- | drivers/tty/serial/xilinx_uartps.c | 46 |
1 files changed, 16 insertions, 30 deletions
diff --git a/drivers/tty/serial/xilinx_uartps.c b/drivers/tty/serial/xilinx_uartps.c index 250a1d888eeb..9e01fe6c0ab8 100644 --- a/drivers/tty/serial/xilinx_uartps.c +++ b/drivers/tty/serial/xilinx_uartps.c @@ -313,41 +313,27 @@ static void cdns_uart_handle_rx(void *dev_id, unsigned int isrstatus) static void cdns_uart_handle_tx(void *dev_id) { struct uart_port *port = (struct uart_port *)dev_id; + struct circ_buf *xmit = &port->state->xmit; unsigned int numbytes; - if (uart_circ_empty(&port->state->xmit)) { + if (uart_circ_empty(xmit)) { writel(CDNS_UART_IXR_TXEMPTY, port->membase + CDNS_UART_IDR); - } else { - numbytes = port->fifosize; - while (numbytes && !uart_circ_empty(&port->state->xmit) && - !(readl(port->membase + CDNS_UART_SR) & - CDNS_UART_SR_TXFULL)) { - /* - * Get the data from the UART circular buffer - * and write it to the cdns_uart's TX_FIFO - * register. - */ - writel( - port->state->xmit.buf[port->state->xmit.tail], - port->membase + CDNS_UART_FIFO); - - port->icount.tx++; - - /* - * Adjust the tail of the UART buffer and wrap - * the buffer if it reaches limit. - */ - port->state->xmit.tail = - (port->state->xmit.tail + 1) & - (UART_XMIT_SIZE - 1); - - numbytes--; - } + return; + } - if (uart_circ_chars_pending( - &port->state->xmit) < WAKEUP_CHARS) - uart_write_wakeup(port); + numbytes = port->fifosize; + while (numbytes && !uart_circ_empty(xmit) && + !(readl(port->membase + CDNS_UART_SR) & CDNS_UART_SR_TXFULL)) { + + writel(xmit->buf[xmit->tail], port->membase + CDNS_UART_FIFO); + + port->icount.tx++; + xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); + numbytes--; } + + if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) + uart_write_wakeup(port); } /** |