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| author | Fugang Duan <fugang.duan@nxp.com> | 2019-09-11 16:23:25 +0800 |
|---|---|---|
| committer | Dong Aisheng <aisheng.dong@nxp.com> | 2019-11-25 15:45:24 +0800 |
| commit | 12ad8eef8490f897b674c16a96384da9789fd1f9 (patch) | |
| tree | 5aa7c8b58b8211b488a11145273d18087d1d5d31 /drivers/tty/serial/fsl_lpuart.c | |
| parent | e085dff6cb6e6d141c421ea2428ed9c72e2203d1 (diff) | |
tty: serial: fsl_lpuart: enable loopback mode
Enable lpuart32 loopback mode.
Signed-off-by: Fugang Duan <fugang.duan@nxp.com>
Diffstat (limited to 'drivers/tty/serial/fsl_lpuart.c')
| -rw-r--r-- | drivers/tty/serial/fsl_lpuart.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c index 826827f725e7..b966e989ac2d 100644 --- a/drivers/tty/serial/fsl_lpuart.c +++ b/drivers/tty/serial/fsl_lpuart.c @@ -1463,6 +1463,14 @@ static void lpuart32_set_mctrl(struct uart_port *port, unsigned int mctrl) temp |= UARTMODIR_TXCTSE; lpuart32_write(port, temp, UARTMODIR); + + temp = lpuart32_read(port, UARTCTRL); + if (mctrl & TIOCM_LOOP) + temp |= UARTCTRL_LOOPS; + else + temp &= ~UARTCTRL_LOOPS; + + lpuart32_write(port, temp, UARTCTRL); } static void lpuart_break_ctl(struct uart_port *port, int break_state) |