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serial: mxs-auart: fix the wrong setting order 

After set the AUART_CTRL0_CLKGATE, the UART will gate all the clocks off.
So the following line will not take effect.
       ................................................................
 	writel(AUART_INTR_RXIEN | AUART_INTR_RTIEN | AUART_INTR_CTSMIEN,
 			u->membase + AUART_INTR_CLR);
       ................................................................

To fix this issue, the patch moves this gate-off line to
the end of setting registers.

Signed-off-by: Huang Shijie <shijie8@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Huang Shijie 2012-09-06 22:38:40 -04:00 committed by Greg Kroah-Hartman
parent 37cd0c994f
commit 851b714b29
1 changed files with 2 additions and 2 deletions
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4
drivers/tty/serial/mxs-auart.c
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@ -457,11 +457,11 @@ static void mxs_auart_shutdown(struct uart_port *u)
writel(AUART_CTRL2_UARTEN, u->membase + AUART_CTRL2_CLR);
writel(AUART_CTRL0_CLKGATE, u->membase + AUART_CTRL0_SET);
writel(AUART_INTR_RXIEN | AUART_INTR_RTIEN | AUART_INTR_CTSMIEN,
u->membase + AUART_INTR_CLR);
writel(AUART_CTRL0_CLKGATE, u->membase + AUART_CTRL0_SET);
clk_disable_unprepare(s->clk);
}