[PATCH 4/9] clk: amba-pl010: convert to clk_prepare()/clk_unprepare()
Russell King - ARM Linux
linux at arm.linux.org.uk
Tue Sep 27 04:27:57 EDT 2011
Signed-off-by: Russell King <rmk+kernel at arm.linux.org.uk>
---
drivers/tty/serial/amba-pl010.c | 14 +++++++++++++-
1 files changed, 13 insertions(+), 1 deletions(-)
diff --git a/drivers/tty/serial/amba-pl010.c b/drivers/tty/serial/amba-pl010.c
index c0d10c4..efdf92c 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)
--
1.7.4.4
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