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Commit f4c2ac96 authored by Junjie Wu's avatar Junjie Wu Committed by Amir Vajid
Browse files

devfreq: devfreq_simple_dev: Add support for preparing device clock 



For certain implementation, device clock needs to be prepared before
rate voting taking effect. Add support for preparing device clock
during initialization.

Change-Id: Ib22e83952187118342ff2546d4c79d3970a288f9
Signed-off-by: default avatarJunjie Wu <junjiew@codeaurora.org>
[avajid@codeaurora.org: made minor styling changes]
Signed-off-by: default avatarAmir Vajid <avajid@codeaurora.org>
parent 5121f0a5

drivers/devfreq/devfreq_simple_dev.c

+15 −3
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0-only

/*

 * Copyright (c) 2014, 2019, The Linux Foundation. All rights reserved.

 * Copyright (c) 2014-2015, 2019, The Linux Foundation. All rights reserved.

 */



#define pr_fmt(fmt) "devfreq-simple-dev: " fmt
@@ -147,11 +147,23 @@ static int devfreq_clock_probe(struct platform_device *pdev) 
	if (of_property_read_string(dev->of_node, "governor", &gov_name))

		gov_name = "performance";



	if (of_property_read_bool(dev->of_node, "qcom,prepare-clk")) {

		ret = clk_prepare(d->clk);

		if (ret < 0)

			return ret;

	}



	d->df = devfreq_add_device(dev, p, gov_name, NULL);

	if (IS_ERR(d->df))

		return PTR_ERR_OR_ZERO(d->df);

	if (IS_ERR(d->df)) {

		ret = PTR_ERR_OR_ZERO(d->df);

		goto add_err;

	}



	return 0;

add_err:

	if (of_property_read_bool(dev->of_node, "qcom,prepare-clk"))

		clk_unprepare(d->clk);

	return ret;

}



static int devfreq_clock_remove(struct platform_device *pdev)