linux-kernel - [PATCH 1/2] pinctrl: pinctrl-imx: Add suspend/resume for LPSR

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Date:   Mon, 25 Mar 2019 13:48:49 +0000
From:   Abel Vesa <abel.vesa@....com>
To:     Aisheng Dong <aisheng.dong@....com>,
        Fabio Estevam <fabio.estevam@....com>,
        Shawn Guo <shawnguo@...nel.org>,
        Stefan Agner <stefan@...er.ch>,
        Linus Walleij <linus.walleij@...aro.org>,
        Sascha Hauer <kernel@...gutronix.de>
CC:     dl-linux-imx <linux-imx@....com>,
        "linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "b38343@...escale.com" <b38343@...escale.com>,
        Abel Vesa <abel.vesa@....com>
Subject: [PATCH 1/2] pinctrl: pinctrl-imx: Add suspend/resume for LPSR

From: Robin Gong <b38343@...escale.com>

To support pinctl hog restore after LPSR resume back,
add suspend/resume in pinctrl driver.

Signed-off-by: Robin Gong <b38343@...escale.com>
Signed-off-by: Abel Vesa <abel.vesa@....com>
---
 drivers/pinctrl/freescale/pinctrl-imx.c | 20 ++++++++++++++++++++
 drivers/pinctrl/freescale/pinctrl-imx.h |  3 +++
 2 files changed, 23 insertions(+)

diff --git a/drivers/pinctrl/freescale/pinctrl-imx.c b/drivers/pinctrl/freescale/pinctrl-imx.c
index 188001b..93c0253 100644
--- a/drivers/pinctrl/freescale/pinctrl-imx.c
+++ b/drivers/pinctrl/freescale/pinctrl-imx.c
@@ -887,3 +887,23 @@ int imx_pinctrl_probe(struct platform_device *pdev,
 
 	return ret;
 }
+
+int imx_pinctrl_suspend(struct device *dev)
+{
+	struct imx_pinctrl *ipctl = dev_get_drvdata(dev);
+
+	if (!ipctl)
+		return -EINVAL;
+
+	return pinctrl_force_sleep(ipctl->pctl);
+}
+
+int imx_pinctrl_resume(struct device *dev)
+{
+	struct imx_pinctrl *ipctl = dev_get_drvdata(dev);
+
+	if (!ipctl)
+		return -EINVAL;
+
+	return pinctrl_force_default(ipctl->pctl);
+}
diff --git a/drivers/pinctrl/freescale/pinctrl-imx.h b/drivers/pinctrl/freescale/pinctrl-imx.h
index 98a4889..795669c 100644
--- a/drivers/pinctrl/freescale/pinctrl-imx.h
+++ b/drivers/pinctrl/freescale/pinctrl-imx.h
@@ -136,6 +136,9 @@ struct imx_pinctrl {
 int imx_pinctrl_probe(struct platform_device *pdev,
 			const struct imx_pinctrl_soc_info *info);
 
+int imx_pinctrl_suspend(struct device *dev);
+int imx_pinctrl_resume(struct device *dev);
+
 #ifdef CONFIG_PINCTRL_IMX_SCU
 #define BM_PAD_CTL_GP_ENABLE		BIT(30)
 #define BM_PAD_CTL_IFMUX_ENABLE		BIT(31)
-- 
2.7.4