linux-kernel - [PATCH 7/7] memory: atmel-ebi: Add PM ops

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Message-Id: <1487609701-10300-8-git-send-email-boris.brezillon@free-electrons.com>
Date:   Mon, 20 Feb 2017 17:55:01 +0100
From:   Boris Brezillon <boris.brezillon@...e-electrons.com>
To:     Nicolas Ferre <nicolas.ferre@...el.com>,
        Alexandre Belloni <alexandre.belloni@...e-electrons.com>
Cc:     linux-arm-kernel@...ts.infradead.org,
        Samuel Ortiz <sameo@...ux.intel.com>,
        Lee Jones <lee.jones@...aro.org>, linux-kernel@...r.kernel.org,
        Boris Brezillon <boris.brezillon@...e-electrons.com>
Subject: [PATCH 7/7] memory: atmel-ebi: Add PM ops

Add a ->resume() hook to make sure the EBI dev configs are correctly
restored when resuming the platform.

Signed-off-by: Boris Brezillon <boris.brezillon@...e-electrons.com>
---
 drivers/memory/atmel-ebi.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/drivers/memory/atmel-ebi.c b/drivers/memory/atmel-ebi.c
index 06a1a136d448..15120cb37cf0 100644
--- a/drivers/memory/atmel-ebi.c
+++ b/drivers/memory/atmel-ebi.c
@@ -506,6 +506,8 @@ static int atmel_ebi_probe(struct platform_device *pdev)
 	if (!ebi)
 		return -ENOMEM;
 
+	platform_set_drvdata(pdev, ebi);
+
 	INIT_LIST_HEAD(&ebi->devs);
 	ebi->caps = match->data;
 	ebi->dev = dev;
@@ -578,10 +580,28 @@ static int atmel_ebi_probe(struct platform_device *pdev)
 	return of_platform_populate(np, NULL, NULL, dev);
 }
 
+static int atmel_ebi_resume(struct device *dev)
+{
+	struct atmel_ebi *ebi = dev_get_drvdata(dev);
+	struct atmel_ebi_dev *ebid;
+
+	list_for_each_entry(ebid, &ebi->devs, node) {
+		int i;
+
+		for (i = 0; i < ebid->numcs; i++)
+			ebid->ebi->caps->apply_config(ebid, &ebid->configs[i]);
+	}
+
+	return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(atmel_ebi_pm_ops, NULL, atmel_ebi_resume);
+
 static struct platform_driver atmel_ebi_driver = {
 	.driver = {
 		.name = "atmel-ebi",
 		.of_match_table	= atmel_ebi_id_table,
+		.pm = &atmel_ebi_pm_ops,
 	},
 };
 builtin_platform_driver_probe(atmel_ebi_driver, atmel_ebi_probe);
-- 
2.7.4