linux-kernel - [PATCH v6 1/7] pinctrl: rockchip: add suspend/resume functions

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Message-Id: <1414583525-17395-2-git-send-email-zyw@rock-chips.com>
Date:	Wed, 29 Oct 2014 19:51:59 +0800
From:	Chris Zhong <zyw@...k-chips.com>
To:	heiko@...ech.de, dianders@...omium.org
Cc:	mturquette@...aro.org,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Russell King <linux@....linux.org.uk>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Linus Walleij <linus.walleij@...aro.org>, khilman@...nel.org,
	linux-rockchip@...ts.infradead.org,
	Chris Zhong <zyw@...k-chips.com>,
	linux-arm-kernel@...ts.infradead.org, linux-gpio@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v6 1/7] pinctrl: rockchip: add suspend/resume functions

support suspend/resume of pinctrl, it allows handling sleep mode
for hogged pins in pinctrl

Signed-off-by: Chris Zhong <zyw@...k-chips.com>
Tested-by: Doug Anderson <dianders@...omium.org>
Reviewed-by: Doug Anderson <dianders@...omium.org>
Tested-by: Heiko Stuebner <heiko@...ech.de>
Reviewed-by: Heiko Stuebner <heiko@...ech.de>

---

Changes in v6: None
Changes in v5:
- reset-author
- use "__maybe_unused" annotation

Changes in v4:
- use SIMPLE_DEV_PM_OPS for suspend/resume struct

Changes in v3: None
Changes in v2: None

 drivers/pinctrl/pinctrl-rockchip.c |   18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/drivers/pinctrl/pinctrl-rockchip.c b/drivers/pinctrl/pinctrl-rockchip.c
index 016f457..172ad1d 100644
--- a/drivers/pinctrl/pinctrl-rockchip.c
+++ b/drivers/pinctrl/pinctrl-rockchip.c
@@ -1770,6 +1770,23 @@ static struct rockchip_pin_ctrl *rockchip_pinctrl_get_soc_data(
 	return ctrl;
 }
 
+static int __maybe_unused rockchip_pinctrl_suspend(struct device *dev)
+{
+	struct rockchip_pinctrl *info = dev_get_drvdata(dev);
+
+	return pinctrl_force_sleep(info->pctl_dev);
+}
+
+static int __maybe_unused rockchip_pinctrl_resume(struct device *dev)
+{
+	struct rockchip_pinctrl *info = dev_get_drvdata(dev);
+
+	return pinctrl_force_default(info->pctl_dev);
+}
+
+static SIMPLE_DEV_PM_OPS(rockchip_pinctrl_dev_pm_ops, rockchip_pinctrl_suspend,
+			 rockchip_pinctrl_resume);
+
 static int rockchip_pinctrl_probe(struct platform_device *pdev)
 {
 	struct rockchip_pinctrl *info;
@@ -1983,6 +2000,7 @@ static struct platform_driver rockchip_pinctrl_driver = {
 	.driver = {
 		.name	= "rockchip-pinctrl",
 		.owner	= THIS_MODULE,
+		.pm = &rockchip_pinctrl_dev_pm_ops,
 		.of_match_table = rockchip_pinctrl_dt_match,
 	},
 };
-- 
1.7.9.5

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