diff options
| author |   Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com> | 2019-04-09 13:15:24 +0530 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-04-29 16:20:24 +0200 |
| commit | 1863178b20c5add7e6d217f2bf6d094ff13660f7 (patch) | |
| tree | fa75cfeddabcccd39d567e2f063ca9a10a7510a8 /drivers/tty/serial | |
| parent | dt-bindings: xilinx-uartps: Add support for cts-override (diff) | |
| download | linux-dev-1863178b20c5add7e6d217f2bf6d094ff13660f7.tar.xz linux-dev-1863178b20c5add7e6d217f2bf6d094ff13660f7.zip | |
serial: uartps: Add support for cts-override
Having flow is configurable. Add support for the same by
checking for cts-override.
Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial')
| -rw-r--r-- | drivers/tty/serial/xilinx_uartps.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/tty/serial/xilinx_uartps.c b/drivers/tty/serial/xilinx_uartps.c index 74089f5e5b53..605354fd60b1 100644 --- a/drivers/tty/serial/xilinx_uartps.c +++ b/drivers/tty/serial/xilinx_uartps.c @@ -193,6 +193,7 @@ struct cdns_uart { int id; struct notifier_block clk_rate_change_nb; u32 quirks; + bool cts_override; }; struct cdns_platform_data { u32 quirks; @@ -1000,6 +1001,11 @@ static void cdns_uart_config_port(struct uart_port *port, int flags) */ static unsigned int cdns_uart_get_mctrl(struct uart_port *port) { + struct cdns_uart *cdns_uart_data = port->private_data; + + if (cdns_uart_data->cts_override) + return 0; + return TIOCM_CTS | TIOCM_DSR | TIOCM_CAR; } @@ -1007,6 +1013,10 @@ static void cdns_uart_set_mctrl(struct uart_port *port, unsigned int mctrl) { u32 val; u32 mode_reg; + struct cdns_uart *cdns_uart_data = port->private_data; + + if (cdns_uart_data->cts_override) + return; val = readl(port->membase + CDNS_UART_MODEMCR); mode_reg = readl(port->membase + CDNS_UART_MR); @@ -1665,6 +1675,8 @@ static int cdns_uart_probe(struct platform_device *pdev) console_port = NULL; #endif + cdns_uart_data->cts_override = of_property_read_bool(pdev->dev.of_node, + "cts-override"); return 0; err_out_pm_disable: |