linux-kernel - [PATCH 2/2 v2] pinctrl/nomadik: adopt pinctrl sleep mode management

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Date:	Fri, 14 Dec 2012 21:21:12 +0100
From:	Linus Walleij <linus.walleij@...ricsson.com>
To:	<linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>
Cc:	Stephen Warren <swarren@...dia.com>,
	Anmar Oueja <anmar.oueja@...aro.org>,
	Julien Delacou <julien.delacou@...ricsson.com>,
	Linus Walleij <linus.walleij@...aro.org>
Subject: [PATCH 2/2 v2] pinctrl/nomadik: adopt pinctrl sleep mode management

From: Julien Delacou <julien.delacou@...ricsson.com>

This fix makes pinctrl-nomadik able to handle
suspend/resume events and change hogged pins states
accordingly.

Signed-off-by: Julien Delacou <julien.delacou@...ricsson.com>
Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
---
ChangeLog v1->v2:
- Use the new interface from the local "core.h" file
---
 drivers/pinctrl/pinctrl-nomadik.c | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/drivers/pinctrl/pinctrl-nomadik.c b/drivers/pinctrl/pinctrl-nomadik.c
index 0ceef59..1ecb3ea 100644
--- a/drivers/pinctrl/pinctrl-nomadik.c
+++ b/drivers/pinctrl/pinctrl-nomadik.c
@@ -35,6 +35,7 @@
 #include <asm/mach/irq.h>
 #include <mach/irqs.h>
 #include "pinctrl-nomadik.h"
+#include "core.h"
 
 /*
  * The GPIO module in the Nomadik family of Systems-on-Chip is an
@@ -2096,6 +2097,28 @@ static const struct of_device_id nmk_pinctrl_match[] = {
 	{},
 };
 
+static int nmk_pinctrl_suspend(struct platform_device *pdev, pm_message_t state)
+{
+	struct nmk_pinctrl *npct;
+
+	npct = platform_get_drvdata(pdev);
+	if (!npct)
+		return -EINVAL;
+
+	return pinctrl_force_sleep(npct->pctl);
+}
+
+static int nmk_pinctrl_resume(struct platform_device *pdev)
+{
+	struct nmk_pinctrl *npct;
+
+	npct = platform_get_drvdata(pdev);
+	if (!npct)
+		return -EINVAL;
+
+	return pinctrl_force_default(npct->pctl);
+}
+
 static int __devinit nmk_pinctrl_probe(struct platform_device *pdev)
 {
 	const struct platform_device_id *platid = platform_get_device_id(pdev);
@@ -2204,6 +2227,10 @@ static struct platform_driver nmk_pinctrl_driver = {
 	},
 	.probe = nmk_pinctrl_probe,
 	.id_table = nmk_pinctrl_id,
+#ifdef CONFIG_PM
+	.suspend = nmk_pinctrl_suspend,
+	.resume = nmk_pinctrl_resume,
+#endif
 };
 
 static int __init nmk_gpio_init(void)
-- 
1.7.11.3

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