clk: amba-pl010: convert to clk_prepare()/clk_unprepare()

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

1 files changed, 13 insertions, 1 deletions

diff --git a/drivers/tty/serial/amba-pl010.c b/drivers/tty/serial/amba-pl010.c
index c0d10c4ddb73..efdf92c3a352 100644
--- a/drivers/tty/serial/amba-pl010.c
+++ b/drivers/tty/serial/amba-pl010.c
@@ -312,12 +312,16 @@ static int pl010_startup(struct uart_port *port)
         struct uart_amba_port *uap = (struct uart_amba_port *)port;
         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);
 
@@ -343,6 +347,8 @@ static int pl010_startup(struct uart_port *port)
 
  clk_dis:
         clk_disable(uap->clk);
+ clk_unprep:
+        clk_unprepare(uap->clk);
  out:
         return retval;
 }
@@ -370,6 +376,7 @@ static void pl010_shutdown(struct uart_port *port)
          * Shut down the clock producer
          */
         clk_disable(uap->clk);
+        clk_unprepare(uap->clk);
 }
 
 static void
@@ -626,6 +633,7 @@ static int __init pl010_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
@@ -638,6 +646,10 @@ static int __init pl010_console_setup(struct console *co, char *options)
         if (!uap)
                 return -ENODEV;
 
+        ret = clk_prepare(uap->clk);
+        if (ret)
+                return ret;
+
         uap->port.uartclk = clk_get_rate(uap->clk);
 
         if (options)