kernel/cpu/intel_epb.c

1 // SPDX-License-Identifier: GPL-2.0
27  * preference with respect to the power-performance tradeoffs present in the
33  * system-wide transitions from sleep states back into the working state
36  * system-wide transitions to sleep states and restore them on the way back to
38  * when they are taken offline during transitions into system sleep states and
42  * a system-wide PM transition is started are not taken offline again, but their
51  * the system battery to drain too fast, for example, so it is better to adjust
52  * it on CPU bring-up and if the initial EPB value for a given CPU is 0, the
124 	[EPB_INDEX_BALANCE_PERFORMANCE] = "balance-performance",
126 	[EPB_INDEX_BALANCE_POWERSAVE] = "balance-power",
134 	unsigned int cpu = dev->id;  in energy_perf_bias_show()
149 	unsigned int cpu = dev->id;  in energy_perf_bias_store()
158 		return -EINVAL;  in energy_perf_bias_store()
190 		sysfs_merge_group(&cpu_dev->kobj, &intel_epb_attr_group);  in intel_epb_online()
200 		sysfs_unmerge_group(&cpu_dev->kobj, &intel_epb_attr_group);  in intel_epb_offline()
222 		return -ENODEV;  in intel_epb_init()
225 		energ_perf_values[EPB_INDEX_NORMAL] = id->driver_data;  in intel_epb_init()