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Commit 266a2197 authored by Rama Krishna Phani A's avatar Rama Krishna Phani A Committed by Gerrit - the friendly Code Review server
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soc: qcom: smem: Add support for suspend to disk 



Add support to smem driver for suspend to disk feature.
SMEM is cleared during Hibernation. Initialize SMEM
during resume from Hibernation.

Change-Id: I6e9b912f5be46aa21923ce357cc9c0e7fa97c5a7
Signed-off-by: default avatarRama Krishna Phani A <rphani@codeaurora.org>
parent 62d644e7

drivers/soc/qcom/smem.c

+35 −0
Original line number Diff line number Diff line
@@ -1057,6 +1057,40 @@ static int qcom_smem_remove(struct platform_device *pdev) 
	return 0;

}



static int qcom_smem_freeze(struct device *dev)

{

	struct platform_device *pdev = container_of(dev, struct

					platform_device, dev);

	dev_dbg(dev, "%s\n", __func__);



	qcom_smem_remove(pdev);



	return 0;

}



static int qcom_smem_restore(struct device *dev)

{

	int ret = 0;

	struct platform_device *pdev = container_of(dev, struct

					platform_device, dev);

	dev_dbg(dev, "%s\n", __func__);



	/*

	 * SMEM related information has to fetched again

	 * during resuming from Hibernation, Hence call probe.

	 */

	ret = qcom_smem_probe(pdev);

	if (ret)

		dev_err(dev, "Error getting SMEM information");



	return ret;

}



static const struct dev_pm_ops qcom_smem_pm_ops = {

	.freeze = qcom_smem_freeze,

	.restore = qcom_smem_restore,

};



static const struct of_device_id qcom_smem_of_match[] = {

	{ .compatible = "qcom,smem" },

	{}
@@ -1070,6 +1104,7 @@ static struct platform_driver qcom_smem_driver = { 
		.name = "qcom-smem",

		.of_match_table = qcom_smem_of_match,

		.suppress_bind_attrs = true,

		.pm = &qcom_smem_pm_ops,

	},

};