diff options
| author | Magnus Damm <damm@opensource.se> | 2011-04-19 10:38:25 +0000 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2011-05-23 12:22:04 +0900 |
| commit | 5e50d2d622c745d4439fc9a33d932cc3add2318f (patch) | |
| tree | 6262fe71647f6f09f0dbb686dea44da2368bb444 /drivers/tty | |
| parent | 972b1943becc2dd4335c1b9d8ecd07c5ad44dd88 (diff) | |
| download | lwn-5e50d2d622c745d4439fc9a33d932cc3add2318f.tar.gz lwn-5e50d2d622c745d4439fc9a33d932cc3add2318f.zip | |
serial: sh-sci: Runtime PM support
Add support for Runtime PM in the sh-sci driver.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serial/sh-sci.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c index 920a6f929c8b..bb682c4e72a8 100644 --- a/drivers/tty/serial/sh-sci.c +++ b/drivers/tty/serial/sh-sci.c @@ -43,6 +43,7 @@ #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 +563,9 @@ 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 +575,9 @@ 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 +846,8 @@ 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 +859,8 @@ 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 +1769,8 @@ 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; @@ -1938,6 +1951,7 @@ static int sci_remove(struct platform_device *dev) clk_put(port->iclk); clk_put(port->fclk); + pm_runtime_disable(&dev->dev); return 0; } |