Hi Robert, I send following patch to fix the broken serial log of Exynos SoC. As I knew, you also knew this issue. If possible, could you review or test this patch?
Best Regards, Chanwoo Choi On 2016년 03월 14일 09:41, Chanwoo Choi wrote: > This patch fixes the broken serial log when changing the clock source > of uart device. Before disabling the original clock source, this patch > enables the new clock source to protect the clock off state for a split > second. > > Signed-off-by: Chanwoo Choi <[email protected]> > --- > drivers/tty/serial/samsung.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/drivers/tty/serial/samsung.c b/drivers/tty/serial/samsung.c > index d72cd736bdc6..80d59dbfebba 100644 > --- a/drivers/tty/serial/samsung.c > +++ b/drivers/tty/serial/samsung.c > @@ -1265,13 +1265,13 @@ static void s3c24xx_serial_set_termios(struct > uart_port *port, > if (ourport->baudclk != clk) { > s3c24xx_serial_setsource(port, clk_sel); > > + clk_prepare_enable(clk); > + > if (!IS_ERR(ourport->baudclk)) { > clk_disable_unprepare(ourport->baudclk); > ourport->baudclk = ERR_PTR(-EINVAL); > } > > - clk_prepare_enable(clk); > - > ourport->baudclk = clk; > ourport->baudclk_rate = clk ? clk_get_rate(clk) : 0; > } >
