clk: amba-pl011: convert to clk_prepare()/clk_unprepare()

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c
index f5f6831..00233af 100644 (file)
--- a/drivers/tty/serial/amba-pl011.c
+++ b/drivers/tty/serial/amba-pl011.c
@@ -1367,12 +1367,16 @@ static int pl011_startup(struct uart_port *port)
        unsigned int cr;
        int retval;
 
+       retval = clk_prepare(uap->clk);
+       if (retval)
+               goto out;
+
        /*
         * Try to enable the clock producer.
         */
        retval = clk_enable(uap->clk);
        if (retval)
-               goto out;
+               goto clk_unprep;
 
        uap->port.uartclk = clk_get_rate(uap->clk);
 
@@ -1446,6 +1450,8 @@ static int pl011_startup(struct uart_port *port)
 
  clk_dis:
        clk_disable(uap->clk);
+ clk_unprep:
+       clk_unprepare(uap->clk);
  out:
        return retval;
 }
@@ -1497,6 +1503,7 @@ static void pl011_shutdown(struct uart_port *port)
         * Shut down the clock producer
         */
        clk_disable(uap->clk);
+       clk_unprepare(uap->clk);
 
        if (uap->port.dev->platform_data) {
                struct amba_pl011_data *plat;
@@ -1800,6 +1807,7 @@ static int __init pl011_console_setup(struct console *co, char *options)
        int bits = 8;
        int parity = 'n';
        int flow = 'n';
+       int ret;
 
        /*
         * Check whether an invalid uart number has been specified, and
@@ -1812,6 +1820,10 @@ static int __init pl011_console_setup(struct console *co, char *options)
        if (!uap)
                return -ENODEV;
 
+       ret = clk_prepare(uap->clk);
+       if (ret)
+               return ret;
+
        if (uap->port.dev->platform_data) {
                struct amba_pl011_data *plat;