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path: root/drivers/tty/serial/sh-sci.c
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Diffstat (limited to 'drivers/tty/serial/sh-sci.c')
-rw-r--r--drivers/tty/serial/sh-sci.c18
1 files changed, 15 insertions, 3 deletions
diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c
index 920a6f929c8b..ebd8629c108d 100644
--- a/drivers/tty/serial/sh-sci.c
+++ b/drivers/tty/serial/sh-sci.c
@@ -1,6 +1,4 @@
/*
- * drivers/serial/sh-sci.c
- *
* SuperH on-chip serial module support. (SCI with no FIFO / with FIFO)
*
* Copyright (C) 2002 - 2011 Paul Mundt
@@ -43,6 +41,7 @@
#include <linux/platform_device.h>
#include <linux/serial_sci.h>
#include <linux/notifier.h>
+#include <linux/pm_runtime.h>
#include <linux/cpufreq.h>
#include <linux/clk.h>
#include <linux/ctype.h>
@@ -562,6 +561,9 @@ static void sci_break_timer(unsigned long data)
{
struct sci_port *port = (struct sci_port *)data;
+ if (port->enable)
+ port->enable(&port->port);
+
if (sci_rxd_in(&port->port) == 0) {
port->break_flag = 1;
sci_schedule_break_timer(port);
@@ -571,6 +573,9 @@ static void sci_break_timer(unsigned long data)
sci_schedule_break_timer(port);
} else
port->break_flag = 0;
+
+ if (port->disable)
+ port->disable(&port->port);
}
static int sci_handle_errors(struct uart_port *port)
@@ -839,6 +844,8 @@ static void sci_clk_enable(struct uart_port *port)
{
struct sci_port *sci_port = to_sci_port(port);
+ pm_runtime_get_sync(port->dev);
+
clk_enable(sci_port->iclk);
sci_port->port.uartclk = clk_get_rate(sci_port->iclk);
clk_enable(sci_port->fclk);
@@ -850,6 +857,8 @@ static void sci_clk_disable(struct uart_port *port)
clk_disable(sci_port->fclk);
clk_disable(sci_port->iclk);
+
+ pm_runtime_put_sync(port->dev);
}
static int sci_request_irq(struct sci_port *port)
@@ -1758,6 +1767,8 @@ static int __devinit sci_init_single(struct platform_device *dev,
sci_port->enable = sci_clk_enable;
sci_port->disable = sci_clk_disable;
port->dev = &dev->dev;
+
+ pm_runtime_enable(&dev->dev);
}
sci_port->break_timer.data = (unsigned long)sci_port;
@@ -1777,7 +1788,7 @@ static int __devinit sci_init_single(struct platform_device *dev,
*
* For the muxed case there's nothing more to do.
*/
- port->irq = p->irqs[SCIx_TXI_IRQ];
+ port->irq = p->irqs[SCIx_RXI_IRQ];
if (p->dma_dev)
dev_dbg(port->dev, "DMA device %p, tx %d, rx %d\n",
@@ -1938,6 +1949,7 @@ static int sci_remove(struct platform_device *dev)
clk_put(port->iclk);
clk_put(port->fclk);
+ pm_runtime_disable(&dev->dev);
return 0;
}