when the 'CTSC' bit is negated. 'CTS' has no function when 'CTSC' is asserted.
0: The CTS pin is high (inactive)
1: The CTS pin is low (active)
For throttle, it needs to clear 'CTS' and 'CTSC' bits.
For unthrottle, it needs to enable 'CTS' and 'CTSC' bits.
The patch just fix the issue.
Signed-off-by: Fugang Duan <B38611@freescale.com>
Signed-off-by: Huang Shijie <shijie8@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
struct imx_port *sport = (struct imx_port *)port;
unsigned long temp;
- temp = readl(sport->port.membase + UCR2) & ~UCR2_CTS;
-
+ temp = readl(sport->port.membase + UCR2) & ~(UCR2_CTS | UCR2_CTSC);
if (mctrl & TIOCM_RTS)
- if (!sport->dma_is_enabled)
- temp |= UCR2_CTS;
+ temp |= UCR2_CTS | UCR2_CTSC;
writel(temp, sport->port.membase + UCR2);