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Commit 1ca995ce authored by Zhen Kong's avatar Zhen Kong
Browse files

crypto: msm: add pm wakeup support for qcrypto driver 



Add support for holding system from suspending while an operation
is in progress (when clks are enabled).  This is done by invoking
pm_stay_awake before enabling clks (when a crypto operation is
initiated) and invoking pm_relax when crypto operation is done.

Change-Id: I5c7ceb025f6cac1b7c985fc1c308e82f851fca72
Signed-off-by: default avatarZhen Kong <zkong@codeaurora.org>
parent 9af769f1

drivers/crypto/msm/qcrypto.c

+15 −4
Original line number Diff line number Diff line
@@ -380,10 +380,11 @@ static void qcrypto_ce_set_bus(struct crypto_engine *pengine, 
	int ret = 0;



	if (high_bw_req && pengine->high_bw_req == false) {

		pm_stay_awake(&pengine->pdev->dev);

		ret = qce_enable_clk(pengine->qce);

		if (ret) {

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

			return;

			goto clk_err;

		}

		ret = msm_bus_scale_client_update_request(

				pengine->bus_scale_handle, 1);
@@ -391,7 +392,7 @@ static void qcrypto_ce_set_bus(struct crypto_engine *pengine, 
			pr_err("%s Unable to set to high bandwidth\n",

						__func__);

			qce_disable_clk(pengine->qce);

			return;

			goto clk_err;

		}

		pengine->high_bw_req = true;

	} else if (high_bw_req == false && pengine->high_bw_req == true) {
@@ -400,7 +401,7 @@ static void qcrypto_ce_set_bus(struct crypto_engine *pengine, 
		if (ret) {

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

						__func__);

			return;

			goto clk_err;

		}

		ret = qce_disable_clk(pengine->qce);

		if (ret) {
@@ -410,10 +411,16 @@ static void qcrypto_ce_set_bus(struct crypto_engine *pengine, 
			if (ret)

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

						__func__);

			return;

			goto clk_err;

		}

		pengine->high_bw_req = false;

		pm_relax(&pengine->pdev->dev);

	}

	return;

clk_err:

	pm_relax(&pengine->pdev->dev);

	return;



}



static void qcrypto_bw_scale_down_timer_callback(unsigned long data)
@@ -804,6 +811,7 @@ static void _qcrypto_remove_engine(struct crypto_engine *pengine) 
	tasklet_kill(&pengine->done_tasklet);

	cancel_work_sync(&pengine->low_bw_req_ws);

	del_timer_sync(&pengine->bw_scale_down_timer);

	device_init_wakeup(&pengine->pdev->dev, false);



	if (pengine->bus_scale_handle != 0)

		msm_bus_scale_unregister_client(pengine->bus_scale_handle);
@@ -3792,6 +3800,9 @@ static int _qcrypto_probe(struct platform_device *pdev) 
	INIT_WORK(&pengine->low_bw_req_ws, qcrypto_low_bw_req_work);

	pengine->bw_scale_down_timer.function =

			qcrypto_bw_scale_down_timer_callback;



	device_init_wakeup(&pengine->pdev->dev, true);



	tasklet_init(&pengine->done_tasklet, req_done, (unsigned long)pengine);

	crypto_init_queue(&pengine->req_queue, 50);