cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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lpass-macro-common.c (1785B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2// Copyright (c) 2022, The Linux Foundation. All rights reserved.
      3
      4#include <linux/export.h>
      5#include <linux/module.h>
      6#include <linux/init.h>
      7#include <linux/of_platform.h>
      8#include <linux/platform_device.h>
      9#include <linux/pm_domain.h>
     10#include <linux/pm_runtime.h>
     11
     12#include "lpass-macro-common.h"
     13
     14struct lpass_macro *lpass_macro_pds_init(struct device *dev)
     15{
     16	struct lpass_macro *l_pds;
     17	int ret;
     18
     19	if (!of_find_property(dev->of_node, "power-domains", NULL))
     20		return NULL;
     21
     22	l_pds = devm_kzalloc(dev, sizeof(*l_pds), GFP_KERNEL);
     23	if (!l_pds)
     24		return ERR_PTR(-ENOMEM);
     25
     26	l_pds->macro_pd = dev_pm_domain_attach_by_name(dev, "macro");
     27	if (IS_ERR_OR_NULL(l_pds->macro_pd)) {
     28		ret = l_pds->macro_pd ? PTR_ERR(l_pds->macro_pd) : -ENODATA;
     29		goto macro_err;
     30	}
     31
     32	ret = pm_runtime_resume_and_get(l_pds->macro_pd);
     33	if (ret < 0)
     34		goto macro_sync_err;
     35
     36	l_pds->dcodec_pd = dev_pm_domain_attach_by_name(dev, "dcodec");
     37	if (IS_ERR_OR_NULL(l_pds->dcodec_pd)) {
     38		ret = l_pds->dcodec_pd ? PTR_ERR(l_pds->dcodec_pd) : -ENODATA;
     39		goto dcodec_err;
     40	}
     41
     42	ret = pm_runtime_resume_and_get(l_pds->dcodec_pd);
     43	if (ret < 0)
     44		goto dcodec_sync_err;
     45	return l_pds;
     46
     47dcodec_sync_err:
     48	dev_pm_domain_detach(l_pds->dcodec_pd, false);
     49dcodec_err:
     50	pm_runtime_put(l_pds->macro_pd);
     51macro_sync_err:
     52	dev_pm_domain_detach(l_pds->macro_pd, false);
     53macro_err:
     54	return ERR_PTR(ret);
     55}
     56EXPORT_SYMBOL_GPL(lpass_macro_pds_init);
     57
     58void lpass_macro_pds_exit(struct lpass_macro *pds)
     59{
     60	if (pds) {
     61		pm_runtime_put(pds->macro_pd);
     62		dev_pm_domain_detach(pds->macro_pd, false);
     63		pm_runtime_put(pds->dcodec_pd);
     64		dev_pm_domain_detach(pds->dcodec_pd, false);
     65	}
     66}
     67EXPORT_SYMBOL_GPL(lpass_macro_pds_exit);
     68
     69MODULE_DESCRIPTION("Common macro driver");
     70MODULE_LICENSE("GPL");