diff options
| author | Junjie Wu <junjiew@codeaurora.org> | 2015-03-03 17:15:35 -0800 |
|---|---|---|
| committer | David Keitel <dkeitel@codeaurora.org> | 2016-03-23 20:04:27 -0700 |
| commit | 708a8f999e8fd6862cd8729a7ed528f580f90c6b (patch) | |
| tree | 15ee73e6adee2f3d6211e50bcaead25d4b4a4392 /drivers | |
| parent | 7abb04398a7c1772624af4c8f381bb624d7948d4 (diff) | |
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: Junjie Wu <junjiew@codeaurora.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/devfreq/devfreq_simple_dev.c | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/drivers/devfreq/devfreq_simple_dev.c b/drivers/devfreq/devfreq_simple_dev.c index a571867335ca..b354bcb2aba2 100644 --- a/drivers/devfreq/devfreq_simple_dev.c +++ b/drivers/devfreq/devfreq_simple_dev.c @@ -1,5 +1,5 @@ /* - * Copyright (c) 2014, The Linux Foundation. All rights reserved. + * Copyright (c) 2014-2015, The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and @@ -146,12 +146,23 @@ 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) + return ret; + } d->df = devfreq_add_device(dev, p, gov_name, NULL); - if (IS_ERR(d->df)) - return PTR_ERR(d->df); + if (IS_ERR(d->df)) { + ret = PTR_ERR(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) |