diff options
Diffstat (limited to 'drivers/firmware/arm_scmi/scmi_pm_domain.c')
-rw-r--r-- | drivers/firmware/arm_scmi/scmi_pm_domain.c | 153 |
1 files changed, 0 insertions, 153 deletions
diff --git a/drivers/firmware/arm_scmi/scmi_pm_domain.c b/drivers/firmware/arm_scmi/scmi_pm_domain.c deleted file mode 100644 index 0e05a79de8..0000000000 --- a/drivers/firmware/arm_scmi/scmi_pm_domain.c +++ /dev/null @@ -1,153 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * SCMI Generic power domain support. - * - * Copyright (C) 2018-2021 ARM Ltd. - */ - -#include <linux/err.h> -#include <linux/io.h> -#include <linux/module.h> -#include <linux/pm_domain.h> -#include <linux/scmi_protocol.h> - -static const struct scmi_power_proto_ops *power_ops; - -struct scmi_pm_domain { - struct generic_pm_domain genpd; - const struct scmi_protocol_handle *ph; - const char *name; - u32 domain; -}; - -#define to_scmi_pd(gpd) container_of(gpd, struct scmi_pm_domain, genpd) - -static int scmi_pd_power(struct generic_pm_domain *domain, bool power_on) -{ - int ret; - u32 state, ret_state; - struct scmi_pm_domain *pd = to_scmi_pd(domain); - - if (power_on) - state = SCMI_POWER_STATE_GENERIC_ON; - else - state = SCMI_POWER_STATE_GENERIC_OFF; - - ret = power_ops->state_set(pd->ph, pd->domain, state); - if (!ret) - ret = power_ops->state_get(pd->ph, pd->domain, &ret_state); - if (!ret && state != ret_state) - return -EIO; - - return ret; -} - -static int scmi_pd_power_on(struct generic_pm_domain *domain) -{ - return scmi_pd_power(domain, true); -} - -static int scmi_pd_power_off(struct generic_pm_domain *domain) -{ - return scmi_pd_power(domain, false); -} - -static int scmi_pm_domain_probe(struct scmi_device *sdev) -{ - int num_domains, i; - struct device *dev = &sdev->dev; - struct device_node *np = dev->of_node; - struct scmi_pm_domain *scmi_pd; - struct genpd_onecell_data *scmi_pd_data; - struct generic_pm_domain **domains; - const struct scmi_handle *handle = sdev->handle; - struct scmi_protocol_handle *ph; - - if (!handle) - return -ENODEV; - - power_ops = handle->devm_protocol_get(sdev, SCMI_PROTOCOL_POWER, &ph); - if (IS_ERR(power_ops)) - return PTR_ERR(power_ops); - - num_domains = power_ops->num_domains_get(ph); - if (num_domains < 0) { - dev_err(dev, "number of domains not found\n"); - return num_domains; - } - - scmi_pd = devm_kcalloc(dev, num_domains, sizeof(*scmi_pd), GFP_KERNEL); - if (!scmi_pd) - return -ENOMEM; - - scmi_pd_data = devm_kzalloc(dev, sizeof(*scmi_pd_data), GFP_KERNEL); - if (!scmi_pd_data) - return -ENOMEM; - - domains = devm_kcalloc(dev, num_domains, sizeof(*domains), GFP_KERNEL); - if (!domains) - return -ENOMEM; - - for (i = 0; i < num_domains; i++, scmi_pd++) { - u32 state; - - if (power_ops->state_get(ph, i, &state)) { - dev_warn(dev, "failed to get state for domain %d\n", i); - continue; - } - - scmi_pd->domain = i; - scmi_pd->ph = ph; - scmi_pd->name = power_ops->name_get(ph, i); - scmi_pd->genpd.name = scmi_pd->name; - scmi_pd->genpd.power_off = scmi_pd_power_off; - scmi_pd->genpd.power_on = scmi_pd_power_on; - - pm_genpd_init(&scmi_pd->genpd, NULL, - state == SCMI_POWER_STATE_GENERIC_OFF); - - domains[i] = &scmi_pd->genpd; - } - - scmi_pd_data->domains = domains; - scmi_pd_data->num_domains = num_domains; - - dev_set_drvdata(dev, scmi_pd_data); - - return of_genpd_add_provider_onecell(np, scmi_pd_data); -} - -static void scmi_pm_domain_remove(struct scmi_device *sdev) -{ - int i; - struct genpd_onecell_data *scmi_pd_data; - struct device *dev = &sdev->dev; - struct device_node *np = dev->of_node; - - of_genpd_del_provider(np); - - scmi_pd_data = dev_get_drvdata(dev); - for (i = 0; i < scmi_pd_data->num_domains; i++) { - if (!scmi_pd_data->domains[i]) - continue; - pm_genpd_remove(scmi_pd_data->domains[i]); - } -} - -static const struct scmi_device_id scmi_id_table[] = { - { SCMI_PROTOCOL_POWER, "genpd" }, - { }, -}; -MODULE_DEVICE_TABLE(scmi, scmi_id_table); - -static struct scmi_driver scmi_power_domain_driver = { - .name = "scmi-power-domain", - .probe = scmi_pm_domain_probe, - .remove = scmi_pm_domain_remove, - .id_table = scmi_id_table, -}; -module_scmi_driver(scmi_power_domain_driver); - -MODULE_AUTHOR("Sudeep Holla <sudeep.holla@arm.com>"); -MODULE_DESCRIPTION("ARM SCMI power domain driver"); -MODULE_LICENSE("GPL v2"); |