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Commit 7183f51f authored by William Clark's avatar William Clark
Browse files

crypto: msm: add suspend/resume callback for qcedev driver 



Make chanegs to add suspend/resume callback for qcedev driver, and
disable ce clocks when entering suspend and re-enable clocks in resume.

Change-Id: Ibeab1e7cb531af79ae973d7ff0d0ed2d776f6d6f
Signed-off-by: default avatarZhen Kong <zkong@codeaurora.org>
Signed-off-by: default avatarWilliam Clark <wclark@codeaurora.org>
parent a2b0f946

drivers/crypto/msm/qcedev.c

+71 −0
Original line number Diff line number Diff line
@@ -2118,6 +2118,75 @@ static int qcedev_remove(struct platform_device *pdev) 
	return 0;

};



static int qcedev_suspend(struct platform_device *pdev, pm_message_t state)

{

	struct qcedev_control *podev;

	int ret;

	podev = platform_get_drvdata(pdev);



	if (!podev || !podev->platform_support.bus_scale_table)

		return 0;



	mutex_lock(&qcedev_sent_bw_req);

	if (podev->high_bw_req_count) {

		ret = msm_bus_scale_client_update_request(

				podev->bus_scale_handle, 0);

		if (ret) {

			pr_err("%s Unable to set to low bandwidth\n",

						__func__);

			goto suspend_exit;

		}

		ret = qce_disable_clk(podev->qce);

		if (ret) {

			pr_err("%s Unable disable clk\n", __func__);

			ret = msm_bus_scale_client_update_request(

				podev->bus_scale_handle, 1);

			if (ret)

				pr_err("%s Unable to set to high bandwidth\n",

					__func__);

			goto suspend_exit;

		}

	}



suspend_exit:

	mutex_unlock(&qcedev_sent_bw_req);

	return 0;

}



static int qcedev_resume(struct platform_device *pdev)

{

	struct qcedev_control *podev;

	int ret;

	podev = platform_get_drvdata(pdev);



	if (!podev || !podev->platform_support.bus_scale_table)

		return 0;



	mutex_lock(&qcedev_sent_bw_req);

	if (podev->high_bw_req_count) {

		ret = qce_enable_clk(podev->qce);

		if (ret) {

			pr_err("%s Unable enable clk\n", __func__);

			goto resume_exit;

		}

		ret = msm_bus_scale_client_update_request(

				podev->bus_scale_handle, 1);

		if (ret) {

			pr_err("%s Unable to set to high bandwidth\n",

						__func__);

			ret = qce_disable_clk(podev->qce);

			if (ret)

				pr_err("%s Unable enable clk\n",

					__func__);

			goto resume_exit;

		}

	}



resume_exit:

	mutex_unlock(&qcedev_sent_bw_req);

	return 0;

}



static struct of_device_id qcedev_match[] = {

	{	.compatible = "qcom,qcedev",

	},
@@ -2127,6 +2196,8 @@ static struct of_device_id qcedev_match[] = { 
static struct platform_driver qcedev_plat_driver = {

	.probe = qcedev_probe,

	.remove = qcedev_remove,

	.suspend = qcedev_suspend,

	.resume = qcedev_resume,

	.driver = {

		.name = "qce",

		.owner = THIS_MODULE,