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authorPhilippe Schenker <philippe.schenker@toradex.com>2019-10-17 14:14:38 +0000
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-11-04 17:37:54 +0100
commit2b30efe2e88a398224abf9751a3fe1018375826f (patch)
treeac4ed804eee790959d070434e4ff776315ab22d3 /drivers/tty
parentc2a552197106b45d0d801d5b8a6be47563a700df (diff)
tty: serial: lpuart: Remove unnecessary code from set_mctrl
Currently flow control is not working due to lpuart32_set_mctrl that is clearing TXCTSE bit in all cases. This bit gets earlier setup by lpuart32_set_termios. As I read in Documentation set_mctrl is also not meant for hardware flow control rather than gpio setting and clearing a RTS signal. Therefore I guess it is safe to remove the whole code in lpuart32_set_mctrl. This was tested with console on a i.MX8QXP SoC. Signed-off-by: Philippe Schenker <philippe.schenker@toradex.com> Reviewed-by: Fugang Duan <fugang.duan@nxp.com> Link: https://lore.kernel.org/r/20191017141428.10330-1-philippe.schenker@toradex.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
-rw-r--r--drivers/tty/serial/fsl_lpuart.c11
1 files changed, 0 insertions, 11 deletions
diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c
index 537896c4d887..f3271857621c 100644
--- a/drivers/tty/serial/fsl_lpuart.c
+++ b/drivers/tty/serial/fsl_lpuart.c
@@ -1333,18 +1333,7 @@ static void lpuart_set_mctrl(struct uart_port *port, unsigned int mctrl)
static void lpuart32_set_mctrl(struct uart_port *port, unsigned int mctrl)
{
- unsigned long temp;
-
- temp = lpuart32_read(port, UARTMODIR) &
- ~(UARTMODIR_RXRTSE | UARTMODIR_TXCTSE);
-
- if (mctrl & TIOCM_RTS)
- temp |= UARTMODIR_RXRTSE;
-
- if (mctrl & TIOCM_CTS)
- temp |= UARTMODIR_TXCTSE;
- lpuart32_write(port, temp, UARTMODIR);
}
static void lpuart_break_ctl(struct uart_port *port, int break_state)