Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * Copyright 2012 Calxeda, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  * Based on arch/arm/plat-mxc/cpuidle.c: #v3.7
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  * Copyright 2012 Freescale Semiconductor, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  * Copyright 2012 Linaro Ltd.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9)  * Maintainer: Rob Herring <rob.herring@calxeda.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/cpuidle.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/cpu_pm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/psci.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <asm/cpuidle.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <asm/suspend.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <uapi/linux/psci.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #define CALXEDA_IDLE_PARAM \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 	((0 << PSCI_0_2_POWER_STATE_ID_SHIFT) | \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 	 (0 << PSCI_0_2_POWER_STATE_AFFL_SHIFT) | \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	 (PSCI_POWER_STATE_TYPE_POWER_DOWN << PSCI_0_2_POWER_STATE_TYPE_SHIFT))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) static int calxeda_idle_finish(unsigned long val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 	return psci_ops.cpu_suspend(CALXEDA_IDLE_PARAM, __pa(cpu_resume));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) static int calxeda_pwrdown_idle(struct cpuidle_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 				struct cpuidle_driver *drv,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 				int index)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 	cpu_pm_enter();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 	cpu_suspend(0, calxeda_idle_finish);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 	cpu_pm_exit();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 	return index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) static struct cpuidle_driver calxeda_idle_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 	.name = "calxeda_idle",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 	.states = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 		ARM_CPUIDLE_WFI_STATE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 		{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 			.name = "PG",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 			.desc = "Power Gate",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 			.exit_latency = 30,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 			.power_usage = 50,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 			.target_residency = 200,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 			.enter = calxeda_pwrdown_idle,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 		},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 	.state_count = 2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) static int calxeda_cpuidle_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 	return cpuidle_register(&calxeda_idle_driver, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) static struct platform_driver calxeda_cpuidle_plat_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)         .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)                 .name = "cpuidle-calxeda",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)         },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)         .probe = calxeda_cpuidle_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) builtin_platform_driver(calxeda_cpuidle_plat_driver);