diff options
Diffstat (limited to 'drivers/soc/ti/ti_sci_pm_domains.c')
| -rw-r--r-- | drivers/soc/ti/ti_sci_pm_domains.c | 202 |
1 files changed, 0 insertions, 202 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 b0b283810e72..000000000000 --- a/drivers/soc/ti/ti_sci_pm_domains.c +++ /dev/null @@ -1,202 +0,0 @@ -/* - * 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> - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * version 2 as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - */ - -#include <linux/err.h> -#include <linux/module.h> -#include <linux/mutex.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> - -/** - * struct ti_sci_genpd_dev_data: holds data needed for every device attached - * to this genpd - * @idx: index of the device that identifies it with the system - * control processor. - */ -struct ti_sci_genpd_dev_data { - int idx; -}; - -/** - * struct ti_sci_pm_domain: TI specific data needed for power domain - * @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: generic_pm_domain for use with the genpd framework - */ -struct ti_sci_pm_domain { - const struct ti_sci_handle *ti_sci; - struct device *dev; - struct generic_pm_domain pd; -}; - -#define genpd_to_ti_sci_pd(gpd) container_of(gpd, struct ti_sci_pm_domain, pd) - -/** - * ti_sci_dev_id(): get prepopulated ti_sci id from struct dev - * @dev: pointer to device associated with this genpd - * - * Returns device_id stored from ti,sci_id property - */ -static int ti_sci_dev_id(struct device *dev) -{ - struct generic_pm_domain_data *genpd_data = dev_gpd_data(dev); - struct ti_sci_genpd_dev_data *sci_dev_data = genpd_data->data; - - return sci_dev_data->idx; -} - -/** - * ti_sci_dev_to_sci_handle(): get pointer to ti_sci_handle - * @dev: pointer to device associated with this genpd - * - * Returns ti_sci_handle to be used to communicate with system - * control processor. - */ -static const struct ti_sci_handle *ti_sci_dev_to_sci_handle(struct device *dev) -{ - struct generic_pm_domain *pd = pd_to_genpd(dev->pm_domain); - struct ti_sci_pm_domain *ti_sci_genpd = genpd_to_ti_sci_pd(pd); - - return ti_sci_genpd->ti_sci; -} - -/** - * ti_sci_dev_start(): genpd device start hook called to turn device on - * @dev: pointer to device associated with this genpd to be powered on - */ -static int ti_sci_dev_start(struct device *dev) -{ - const struct ti_sci_handle *ti_sci = ti_sci_dev_to_sci_handle(dev); - int idx = ti_sci_dev_id(dev); - - return ti_sci->ops.dev_ops.get_device(ti_sci, idx); -} - -/** - * ti_sci_dev_stop(): genpd device stop hook called to turn device off - * @dev: pointer to device associated with this genpd to be powered off - */ -static int ti_sci_dev_stop(struct device *dev) -{ - const struct ti_sci_handle *ti_sci = ti_sci_dev_to_sci_handle(dev); - int idx = ti_sci_dev_id(dev); - - return ti_sci->ops.dev_ops.put_device(ti_sci, idx); -} - -static int ti_sci_pd_attach_dev(struct generic_pm_domain *domain, - struct device *dev) -{ - struct device_node *np = dev->of_node; - struct of_phandle_args pd_args; - struct ti_sci_pm_domain *ti_sci_genpd = genpd_to_ti_sci_pd(domain); - const struct ti_sci_handle *ti_sci = ti_sci_genpd->ti_sci; - struct ti_sci_genpd_dev_data *sci_dev_data; - struct generic_pm_domain_data *genpd_data; - int idx, ret = 0; - - ret = of_parse_phandle_with_args(np, "power-domains", - "#power-domain-cells", 0, &pd_args); - if (ret < 0) - return ret; - - if (pd_args.args_count != 1) - return -EINVAL; - - idx = pd_args.args[0]; - - /* - * Check the validity of the requested idx, if the index is not valid - * the PMMC will return a NAK here and we will not allocate it. - */ - ret = ti_sci->ops.dev_ops.is_valid(ti_sci, idx); - if (ret) - return -EINVAL; - - sci_dev_data = kzalloc(sizeof(*sci_dev_data), GFP_KERNEL); - if (!sci_dev_data) - return -ENOMEM; - - sci_dev_data->idx = idx; - - genpd_data = dev_gpd_data(dev); - genpd_data->data = sci_dev_data; - - return 0; -} - -static void ti_sci_pd_detach_dev(struct generic_pm_domain *domain, - struct device *dev) -{ - struct generic_pm_domain_data *genpd_data = dev_gpd_data(dev); - struct ti_sci_genpd_dev_data *sci_dev_data = genpd_data->data; - - kfree(sci_dev_data); - genpd_data->data = NULL; -} - -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 device_node *np = dev->of_node; - struct ti_sci_pm_domain *ti_sci_pd; - int ret; - - ti_sci_pd = devm_kzalloc(dev, sizeof(*ti_sci_pd), GFP_KERNEL); - if (!ti_sci_pd) - return -ENOMEM; - - ti_sci_pd->ti_sci = devm_ti_sci_get_handle(dev); - if (IS_ERR(ti_sci_pd->ti_sci)) - return PTR_ERR(ti_sci_pd->ti_sci); - - ti_sci_pd->dev = dev; - - ti_sci_pd->pd.attach_dev = ti_sci_pd_attach_dev; - ti_sci_pd->pd.detach_dev = ti_sci_pd_detach_dev; - - ti_sci_pd->pd.dev_ops.start = ti_sci_dev_start; - ti_sci_pd->pd.dev_ops.stop = ti_sci_dev_stop; - - pm_genpd_init(&ti_sci_pd->pd, NULL, true); - - ret = of_genpd_add_provider_simple(np, &ti_sci_pd->pd); - - return ret; -} - -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"); |