Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Gilad Ben-Yossef | 434 | 92.74% | 4 | 57.14% |
Ofir Drang | 34 | 7.26% | 3 | 42.86% |
Total | 468 | 7 |
// SPDX-License-Identifier: GPL-2.0 /* Copyright (C) 2012-2019 ARM Limited (or its affiliates). */ #include <linux/kernel.h> #include <linux/interrupt.h> #include <linux/pm_runtime.h> #include "cc_driver.h" #include "cc_buffer_mgr.h" #include "cc_request_mgr.h" #include "cc_sram_mgr.h" #include "cc_ivgen.h" #include "cc_hash.h" #include "cc_pm.h" #include "cc_fips.h" #define POWER_DOWN_ENABLE 0x01 #define POWER_DOWN_DISABLE 0x00 const struct dev_pm_ops ccree_pm = { SET_RUNTIME_PM_OPS(cc_pm_suspend, cc_pm_resume, NULL) }; int cc_pm_suspend(struct device *dev) { struct cc_drvdata *drvdata = dev_get_drvdata(dev); int rc; dev_dbg(dev, "set HOST_POWER_DOWN_EN\n"); rc = cc_suspend_req_queue(drvdata); if (rc) { dev_err(dev, "cc_suspend_req_queue (%x)\n", rc); return rc; } fini_cc_regs(drvdata); cc_iowrite(drvdata, CC_REG(HOST_POWER_DOWN_EN), POWER_DOWN_ENABLE); cc_clk_off(drvdata); return 0; } int cc_pm_resume(struct device *dev) { int rc; struct cc_drvdata *drvdata = dev_get_drvdata(dev); dev_dbg(dev, "unset HOST_POWER_DOWN_EN\n"); /* Enables the device source clk */ rc = cc_clk_on(drvdata); if (rc) { dev_err(dev, "failed getting clock back on. We're toast.\n"); return rc; } cc_iowrite(drvdata, CC_REG(HOST_POWER_DOWN_EN), POWER_DOWN_DISABLE); rc = init_cc_regs(drvdata, false); if (rc) { dev_err(dev, "init_cc_regs (%x)\n", rc); return rc; } /* check if tee fips error occurred during power down */ cc_tee_handle_fips_error(drvdata); rc = cc_resume_req_queue(drvdata); if (rc) { dev_err(dev, "cc_resume_req_queue (%x)\n", rc); return rc; } /* must be after the queue resuming as it uses the HW queue*/ cc_init_hash_sram(drvdata); cc_init_iv_sram(drvdata); return 0; } int cc_pm_get(struct device *dev) { int rc = 0; struct cc_drvdata *drvdata = dev_get_drvdata(dev); if (cc_req_queue_suspended(drvdata)) rc = pm_runtime_get_sync(dev); else pm_runtime_get_noresume(dev); return rc; } int cc_pm_put_suspend(struct device *dev) { int rc = 0; struct cc_drvdata *drvdata = dev_get_drvdata(dev); if (!cc_req_queue_suspended(drvdata)) { pm_runtime_mark_last_busy(dev); rc = pm_runtime_put_autosuspend(dev); } else { /* Something wrong happens*/ dev_err(dev, "request to suspend already suspended queue"); rc = -EBUSY; } return rc; } int cc_pm_init(struct cc_drvdata *drvdata) { struct device *dev = drvdata_to_dev(drvdata); /* must be before the enabling to avoid resdundent suspending */ pm_runtime_set_autosuspend_delay(dev, CC_SUSPEND_TIMEOUT); pm_runtime_use_autosuspend(dev); /* activate the PM module */ return pm_runtime_set_active(dev); } /* enable the PM module*/ void cc_pm_go(struct cc_drvdata *drvdata) { pm_runtime_enable(drvdata_to_dev(drvdata)); } void cc_pm_fini(struct cc_drvdata *drvdata) { pm_runtime_disable(drvdata_to_dev(drvdata)); }
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