[PATCH v8 3/3] OMAP4:keypad: PM runtime

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



From: Abraham Arce <x0066660@xxxxxx>

Enable Runtime PM functionality in OMAP4 driver based on the following assumptions

A minimal pm runtime get/put approach is implemented in probe/remove calls
respectively.

- Keyboard controller in wakeup domain so it is always on and
  power impact may be minimal
- In OMAP4 the device control is at module/device level and ick/fclk level control is
  difficult so cutting of clocks will prevent interrupts.

Signed-off-by: Abraham Arce <x0066660@xxxxxx>
Cc: Kevin Hilman <khilman@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Shubhrajyoti D <shubhrajyoti@xxxxxx>
---
 drivers/input/keyboard/omap4-keypad.c |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/drivers/input/keyboard/omap4-keypad.c b/drivers/input/keyboard/omap4-keypad.c
index 45bd097..fcfbb9b 100644
--- a/drivers/input/keyboard/omap4-keypad.c
+++ b/drivers/input/keyboard/omap4-keypad.c
@@ -29,6 +29,7 @@
 #include <linux/io.h>
 #include <linux/input.h>
 #include <linux/slab.h>
+#include <linux/pm_runtime.h>
 
 #include <plat/omap4-keypad.h>
 
@@ -239,6 +240,9 @@ static int __devinit omap4_keypad_probe(struct platform_device *pdev)
 	matrix_keypad_build_keymap(pdata->keymap_data, row_shift,
 			input_dev->keycode, input_dev->keybit);
 
+	pm_runtime_enable(&pdev->dev);
+	pm_runtime_get_sync(&pdev->dev);
+
 	omap4_keypad_config(keypad_data);
 
 	error = request_irq(keypad_data->irq, omap4_keypad_interrupt,
@@ -278,6 +282,10 @@ static int __devexit omap4_keypad_remove(struct platform_device *pdev)
 	struct resource *res;
 
 	free_irq(keypad_data->irq, keypad_data);
+
+	pm_runtime_put_sync(&pdev->dev);
+	pm_runtime_disable(&pdev->dev);
+
 	input_unregister_device(keypad_data->input);
 
 	iounmap(keypad_data->base);
-- 
1.7.0.4

--
To unsubscribe from this list: send the line "unsubscribe linux-omap" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html


[Index of Archives]     [Linux Arm (vger)]     [ARM Kernel]     [ARM MSM]     [Linux Tegra]     [Linux WPAN Networking]     [Linux Wireless Networking]     [Maemo Users]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite Trails]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux