Hello,
On Mon, Jun 01, 2015 at 10:51:06AM +0530, Bhuvanchandra DV wrote:
> The LPUART does not provide manual control of RTS/CTS signals,
> those can only be controlled by the hardware directly. Therefore
> manual control of those signals through mctrl can not be provided.
> The current implementation enables/disables the automatic control,
> which is not what mctrl should do, hence remove the incorrect
> implementation.
>
> Signed-off-by: Bhuvanchandra DV <bhuvanchandra...@toradex.com>
> ---
> drivers/tty/serial/fsl_lpuart.c | 63
> +++++------------------------------------
> 1 file changed, 7 insertions(+), 56 deletions(-)
>
> diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c
> index 08ce76f..532cfb7 100644
> --- a/drivers/tty/serial/fsl_lpuart.c
> +++ b/drivers/tty/serial/fsl_lpuart.c
> @@ -822,64 +822,15 @@ static unsigned int lpuart32_tx_empty(struct uart_port
> *port)
>
> static unsigned int lpuart_get_mctrl(struct uart_port *port)
> {
> - unsigned int temp = 0;
> - unsigned char reg;
> -
> - reg = readb(port->membase + UARTMODEM);
> - if (reg & UARTMODEM_TXCTSE)
> - temp |= TIOCM_CTS;
> -
> - if (reg & UARTMODEM_RXRTSE)
> - temp |= TIOCM_RTS;
> -
> - return temp;
>From reading the commit log I would expect that you only touch the
set_mctrl function, but not get_mctrl. Assuming your code change is
right, can you mention this in the commit log please? The bits
UARTMODEM_TXCTSE and UARTMODEM_RXRTSE only control the automatic mode?
What is the problem you're fixing here? I'm not sure how such an UART
should be handled, but I imagine that you want to make use of automatic
mode in some cases. Greg?
Best regards
Uwe
--
Pengutronix e.K. | Uwe Kleine-König |
Industrial Linux Solutions | http://www.pengutronix.de/ |
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