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 (C) 2014 Linaro Ltd.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  * Author: Ulf Hansson <ulf.hansson@linaro.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  * Implements PM domains using the generic PM domain for ux500.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) #include <linux/printk.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/of.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/pm_domain.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <dt-bindings/arm/ux500_pm_domains.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include "pm_domains.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) static int pd_power_off(struct generic_pm_domain *domain)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 	 * Handle the gating of the PM domain regulator here.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 	 *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 	 * Drivers/subsystems handling devices in the PM domain needs to perform
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	 * register context save/restore from their respective runtime PM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 	 * callbacks, to be able to enable PM domain gating/ungating.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) static int pd_power_on(struct generic_pm_domain *domain)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 	 * Handle the ungating of the PM domain regulator here.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 	 *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 	 * Drivers/subsystems handling devices in the PM domain needs to perform
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 	 * register context save/restore from their respective runtime PM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 	 * callbacks, to be able to enable PM domain gating/ungating.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) static struct generic_pm_domain ux500_pm_domain_vape = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 	.name = "VAPE",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 	.power_off = pd_power_off,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 	.power_on = pd_power_on,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) static struct generic_pm_domain *ux500_pm_domains[NR_DOMAINS] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 	[DOMAIN_VAPE] = &ux500_pm_domain_vape,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) static const struct of_device_id ux500_pm_domain_matches[] __initconst = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 	{ .compatible = "stericsson,ux500-pm-domains", },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 	{ },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) int __init ux500_pm_domains_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 	struct device_node *np;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 	struct genpd_onecell_data *genpd_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 	np = of_find_matching_node(NULL, ux500_pm_domain_matches);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 	if (!np)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 		return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) 	genpd_data = kzalloc(sizeof(*genpd_data), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) 	if (!genpd_data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) 	genpd_data->domains = ux500_pm_domains;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) 	genpd_data->num_domains = ARRAY_SIZE(ux500_pm_domains);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) 	for (i = 0; i < ARRAY_SIZE(ux500_pm_domains); ++i)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) 		pm_genpd_init(ux500_pm_domains[i], NULL, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) 	of_genpd_add_provider_onecell(np, genpd_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) }