diff options
Diffstat (limited to 'drivers/soc/ti/ti_sci_pm_domains.c')
| -rw-r--r-- | drivers/soc/ti/ti_sci_pm_domains.c | 208 |
1 files changed, 0 insertions, 208 deletions
diff --git a/drivers/soc/ti/ti_sci_pm_domains.c b/drivers/soc/ti/ti_sci_pm_domains.c deleted file mode 100644 index a33ec7eaf23d..000000000000 --- a/drivers/soc/ti/ti_sci_pm_domains.c +++ /dev/null @@ -1,208 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * TI SCI Generic Power Domain Driver - * - * Copyright (C) 2015-2017 Texas Instruments Incorporated - http://www.ti.com/ - * J Keerthy <j-keerthy@ti.com> - * Dave Gerlach <d-gerlach@ti.com> - */ - -#include <linux/err.h> -#include <linux/module.h> -#include <linux/of.h> -#include <linux/platform_device.h> -#include <linux/pm_domain.h> -#include <linux/slab.h> -#include <linux/soc/ti/ti_sci_protocol.h> -#include <dt-bindings/soc/ti,sci_pm_domain.h> - -/** - * struct ti_sci_genpd_provider: holds common TI SCI genpd provider data - * @ti_sci: handle to TI SCI protocol driver that provides ops to - * communicate with system control processor. - * @dev: pointer to dev for the driver for devm allocs - * @pd_list: list of all the power domains on the device - * @data: onecell data for genpd core - */ -struct ti_sci_genpd_provider { - const struct ti_sci_handle *ti_sci; - struct device *dev; - struct list_head pd_list; - struct genpd_onecell_data data; -}; - -/** - * struct ti_sci_pm_domain: TI specific data needed for power domain - * @idx: index of the device that identifies it with the system - * control processor. - * @exclusive: Permissions for exclusive request or shared request of the - * device. - * @pd: generic_pm_domain for use with the genpd framework - * @node: link for the genpd list - * @parent: link to the parent TI SCI genpd provider - */ -struct ti_sci_pm_domain { - int idx; - u8 exclusive; - struct generic_pm_domain pd; - struct list_head node; - struct ti_sci_genpd_provider *parent; -}; - -#define genpd_to_ti_sci_pd(gpd) container_of(gpd, struct ti_sci_pm_domain, pd) - -/* - * ti_sci_pd_power_off(): genpd power down hook - * @domain: pointer to the powerdomain to power off - */ -static int ti_sci_pd_power_off(struct generic_pm_domain *domain) -{ - struct ti_sci_pm_domain *pd = genpd_to_ti_sci_pd(domain); - const struct ti_sci_handle *ti_sci = pd->parent->ti_sci; - - return ti_sci->ops.dev_ops.put_device(ti_sci, pd->idx); -} - -/* - * ti_sci_pd_power_on(): genpd power up hook - * @domain: pointer to the powerdomain to power on - */ -static int ti_sci_pd_power_on(struct generic_pm_domain *domain) -{ - struct ti_sci_pm_domain *pd = genpd_to_ti_sci_pd(domain); - const struct ti_sci_handle *ti_sci = pd->parent->ti_sci; - - if (pd->exclusive) - return ti_sci->ops.dev_ops.get_device_exclusive(ti_sci, - pd->idx); - else - return ti_sci->ops.dev_ops.get_device(ti_sci, pd->idx); -} - -/* - * ti_sci_pd_xlate(): translation service for TI SCI genpds - * @genpdspec: DT identification data for the genpd - * @data: genpd core data for all the powerdomains on the device - */ -static struct generic_pm_domain *ti_sci_pd_xlate( - struct of_phandle_args *genpdspec, - void *data) -{ - struct genpd_onecell_data *genpd_data = data; - unsigned int idx = genpdspec->args[0]; - - if (genpdspec->args_count != 1 && genpdspec->args_count != 2) - return ERR_PTR(-EINVAL); - - if (idx >= genpd_data->num_domains) { - pr_err("%s: invalid domain index %u\n", __func__, idx); - return ERR_PTR(-EINVAL); - } - - if (!genpd_data->domains[idx]) - return ERR_PTR(-ENOENT); - - genpd_to_ti_sci_pd(genpd_data->domains[idx])->exclusive = - genpdspec->args[1]; - - return genpd_data->domains[idx]; -} - -static const struct of_device_id ti_sci_pm_domain_matches[] = { - { .compatible = "ti,sci-pm-domain", }, - { }, -}; -MODULE_DEVICE_TABLE(of, ti_sci_pm_domain_matches); - -static int ti_sci_pm_domain_probe(struct platform_device *pdev) -{ - struct device *dev = &pdev->dev; - struct ti_sci_genpd_provider *pd_provider; - struct ti_sci_pm_domain *pd; - struct device_node *np = NULL; - struct of_phandle_args args; - int ret; - u32 max_id = 0; - int index; - - pd_provider = devm_kzalloc(dev, sizeof(*pd_provider), GFP_KERNEL); - if (!pd_provider) - return -ENOMEM; - - pd_provider->ti_sci = devm_ti_sci_get_handle(dev); - if (IS_ERR(pd_provider->ti_sci)) - return PTR_ERR(pd_provider->ti_sci); - - pd_provider->dev = dev; - - INIT_LIST_HEAD(&pd_provider->pd_list); - - /* Find highest device ID used for power domains */ - while (1) { - np = of_find_node_with_property(np, "power-domains"); - if (!np) - break; - - index = 0; - - while (1) { - ret = of_parse_phandle_with_args(np, "power-domains", - "#power-domain-cells", - index, &args); - if (ret) - break; - - if (args.args_count >= 1 && args.np == dev->of_node) { - if (args.args[0] > max_id) - max_id = args.args[0]; - - pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL); - if (!pd) - return -ENOMEM; - - pd->pd.name = devm_kasprintf(dev, GFP_KERNEL, - "pd:%d", - args.args[0]); - if (!pd->pd.name) - return -ENOMEM; - - pd->pd.power_off = ti_sci_pd_power_off; - pd->pd.power_on = ti_sci_pd_power_on; - pd->idx = args.args[0]; - pd->parent = pd_provider; - - pm_genpd_init(&pd->pd, NULL, true); - - list_add(&pd->node, &pd_provider->pd_list); - } - index++; - } - } - - pd_provider->data.domains = - devm_kcalloc(dev, max_id + 1, - sizeof(*pd_provider->data.domains), - GFP_KERNEL); - if (!pd_provider->data.domains) - return -ENOMEM; - - pd_provider->data.num_domains = max_id + 1; - pd_provider->data.xlate = ti_sci_pd_xlate; - - list_for_each_entry(pd, &pd_provider->pd_list, node) - pd_provider->data.domains[pd->idx] = &pd->pd; - - return of_genpd_add_provider_onecell(dev->of_node, &pd_provider->data); -} - -static struct platform_driver ti_sci_pm_domains_driver = { - .probe = ti_sci_pm_domain_probe, - .driver = { - .name = "ti_sci_pm_domains", - .of_match_table = ti_sci_pm_domain_matches, - }, -}; -module_platform_driver(ti_sci_pm_domains_driver); -MODULE_LICENSE("GPL v2"); -MODULE_DESCRIPTION("TI System Control Interface (SCI) Power Domain driver"); -MODULE_AUTHOR("Dave Gerlach"); |