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From 6c133013b75d88d5b4514dfecb3089f830b82d65 Mon Sep 17 00:00:00 2001
From: Yuichi Kusakabe <yuichi.kusakabe@jp.fujitsu.com>
Date: Thu, 18 May 2017 17:35:37 +0900
Subject: [PATCH 07/15] Add rcar-i2c hibernation code
Signed-off-by: Yuichi Kusakabe <yuichi.kusakabe@jp.fujitsu.com>
---
drivers/i2c/busses/i2c-rcar.c | 38 ++++++++++++++++++++++++++++++++++++++
1 file changed, 38 insertions(+)
diff --git a/drivers/i2c/busses/i2c-rcar.c b/drivers/i2c/busses/i2c-rcar.c
index 8242002..c6a5a4b 100644
--- a/drivers/i2c/busses/i2c-rcar.c
+++ b/drivers/i2c/busses/i2c-rcar.c
@@ -754,6 +754,43 @@ static int rcar_i2c_probe(struct platform_device *pdev)
return 0;
}
+static int rcar_i2c_suspend(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct rcar_i2c_priv *priv = platform_get_drvdata(pdev);
+ pr_debug("suspend: i2c adapter name %s", priv->adap.name);
+ pr_debug("suspend: ICSCR: %08x\n", readl(priv->io + ICSCR));
+ pr_debug("suspend: ICMCR: %08x\n", readl(priv->io + ICMCR));
+ pr_debug("suspend: ICSSR: %08x\n", readl(priv->io + ICSSR));
+ pr_debug("suspend: ICMSR: %08x\n", readl(priv->io + ICMSR));
+ pr_debug("suspend: ICSIER: %08x\n", readl(priv->io + ICSIER));
+ pr_debug("suspend: ICMIER: %08x\n", readl(priv->io + ICMIER));
+ pr_debug("suspend: ICCCR: %08x\n", readl(priv->io + ICCCR));
+ pr_debug("suspend: ICSAR: %08x\n", readl(priv->io + ICSAR));
+ pr_debug("suspend: ICMAR: %08x\n", readl(priv->io + ICMAR));
+ clk_disable(priv->clk);
+ return 0;
+}
+static int rcar_i2c_resume(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct rcar_i2c_priv *priv = platform_get_drvdata(pdev);
+ clk_enable(priv->clk);
+ pr_debug("resume: i2c adapter name %s", priv->adap.name);
+ pr_debug("resume: ICSCR: %08x\n", readl(priv->io + ICSCR));
+ pr_debug("resume: ICMCR: %08x\n", readl(priv->io + ICMCR));
+ pr_debug("resume: ICSSR: %08x\n", readl(priv->io + ICSSR));
+ pr_debug("resume: ICMSR: %08x\n", readl(priv->io + ICMSR));
+ pr_debug("resume: ICSIER: %08x\n", readl(priv->io + ICSIER));
+ pr_debug("resume: ICMIER: %08x\n", readl(priv->io + ICMIER));
+ pr_debug("resume: ICCCR: %08x\n", readl(priv->io + ICCCR));
+ pr_debug("resume: ICSAR: %08x\n", readl(priv->io + ICSAR));
+ pr_debug("resume: ICMAR: %08x\n", readl(priv->io + ICMAR));
+ return 0;
+}
+static const struct dev_pm_ops rcar_i2c_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(rcar_i2c_suspend, rcar_i2c_resume)
+};
static int rcar_i2c_remove(struct platform_device *pdev)
{
@@ -780,6 +817,7 @@ static struct platform_driver rcar_i2c_driver = {
.name = "i2c-rcar",
.owner = THIS_MODULE,
.of_match_table = rcar_i2c_dt_ids,
+ .pm = &rcar_i2c_pm_ops,
},
.probe = rcar_i2c_probe,
.remove = rcar_i2c_remove,
--
1.8.3.1
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