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Diffstat (limited to 'drivers/soc/xilinx/zynqmp_pm_domains.c')
-rw-r--r--drivers/soc/xilinx/zynqmp_pm_domains.c322
1 files changed, 0 insertions, 322 deletions
diff --git a/drivers/soc/xilinx/zynqmp_pm_domains.c b/drivers/soc/xilinx/zynqmp_pm_domains.c
deleted file mode 100644
index 69d03ad4cf1e..000000000000
--- a/drivers/soc/xilinx/zynqmp_pm_domains.c
+++ /dev/null
@@ -1,322 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * ZynqMP Generic PM domain support
- *
- * Copyright (C) 2015-2019 Xilinx, Inc.
- *
- * Davorin Mista <davorin.mista@aggios.com>
- * Jolly Shah <jollys@xilinx.com>
- * Rajan Vaja <rajan.vaja@xilinx.com>
- */
-
-#include <linux/err.h>
-#include <linux/list.h>
-#include <linux/module.h>
-#include <linux/of_platform.h>
-#include <linux/platform_device.h>
-#include <linux/pm_domain.h>
-#include <linux/slab.h>
-
-#include <linux/firmware/xlnx-zynqmp.h>
-
-#define ZYNQMP_NUM_DOMAINS (100)
-
-static int min_capability;
-
-/**
- * struct zynqmp_pm_domain - Wrapper around struct generic_pm_domain
- * @gpd: Generic power domain
- * @node_id: PM node ID corresponding to device inside PM domain
- * @requested: The PM node mapped to the PM domain has been requested
- */
-struct zynqmp_pm_domain {
- struct generic_pm_domain gpd;
- u32 node_id;
- bool requested;
-};
-
-#define to_zynqmp_pm_domain(pm_domain) \
- container_of(pm_domain, struct zynqmp_pm_domain, gpd)
-
-/**
- * zynqmp_gpd_is_active_wakeup_path() - Check if device is in wakeup source
- * path
- * @dev: Device to check for wakeup source path
- * @not_used: Data member (not required)
- *
- * This function is checks device's child hierarchy and checks if any device is
- * set as wakeup source.
- *
- * Return: 1 if device is in wakeup source path else 0
- */
-static int zynqmp_gpd_is_active_wakeup_path(struct device *dev, void *not_used)
-{
- int may_wakeup;
-
- may_wakeup = device_may_wakeup(dev);
- if (may_wakeup)
- return may_wakeup;
-
- return device_for_each_child(dev, NULL,
- zynqmp_gpd_is_active_wakeup_path);
-}
-
-/**
- * zynqmp_gpd_power_on() - Power on PM domain
- * @domain: Generic PM domain
- *
- * This function is called before devices inside a PM domain are resumed, to
- * power on PM domain.
- *
- * Return: 0 on success, error code otherwise
- */
-static int zynqmp_gpd_power_on(struct generic_pm_domain *domain)
-{
- struct zynqmp_pm_domain *pd = to_zynqmp_pm_domain(domain);
- int ret;
-
- ret = zynqmp_pm_set_requirement(pd->node_id,
- ZYNQMP_PM_CAPABILITY_ACCESS,
- ZYNQMP_PM_MAX_QOS,
- ZYNQMP_PM_REQUEST_ACK_BLOCKING);
- if (ret) {
- dev_err(&domain->dev,
- "failed to set requirement to 0x%x for PM node id %d: %d\n",
- ZYNQMP_PM_CAPABILITY_ACCESS, pd->node_id, ret);
- return ret;
- }
-
- dev_dbg(&domain->dev, "set requirement to 0x%x for PM node id %d\n",
- ZYNQMP_PM_CAPABILITY_ACCESS, pd->node_id);
-
- return 0;
-}
-
-/**
- * zynqmp_gpd_power_off() - Power off PM domain
- * @domain: Generic PM domain
- *
- * This function is called after devices inside a PM domain are suspended, to
- * power off PM domain.
- *
- * Return: 0 on success, error code otherwise
- */
-static int zynqmp_gpd_power_off(struct generic_pm_domain *domain)
-{
- struct zynqmp_pm_domain *pd = to_zynqmp_pm_domain(domain);
- int ret;
- struct pm_domain_data *pdd, *tmp;
- u32 capabilities = min_capability;
- bool may_wakeup;
-
- /* If domain is already released there is nothing to be done */
- if (!pd->requested) {
- dev_dbg(&domain->dev, "PM node id %d is already released\n",
- pd->node_id);
- return 0;
- }
-
- list_for_each_entry_safe(pdd, tmp, &domain->dev_list, list_node) {
- /* If device is in wakeup path, set capability to WAKEUP */
- may_wakeup = zynqmp_gpd_is_active_wakeup_path(pdd->dev, NULL);
- if (may_wakeup) {
- dev_dbg(pdd->dev, "device is in wakeup path in %s\n",
- domain->name);
- capabilities = ZYNQMP_PM_CAPABILITY_WAKEUP;
- break;
- }
- }
-
- ret = zynqmp_pm_set_requirement(pd->node_id, capabilities, 0,
- ZYNQMP_PM_REQUEST_ACK_NO);
- if (ret) {
- dev_err(&domain->dev,
- "failed to set requirement to 0x%x for PM node id %d: %d\n",
- capabilities, pd->node_id, ret);
- return ret;
- }
-
- dev_dbg(&domain->dev, "set requirement to 0x%x for PM node id %d\n",
- capabilities, pd->node_id);
-
- return 0;
-}
-
-/**
- * zynqmp_gpd_attach_dev() - Attach device to the PM domain
- * @domain: Generic PM domain
- * @dev: Device to attach
- *
- * Return: 0 on success, error code otherwise
- */
-static int zynqmp_gpd_attach_dev(struct generic_pm_domain *domain,
- struct device *dev)
-{
- struct zynqmp_pm_domain *pd = to_zynqmp_pm_domain(domain);
- struct device_link *link;
- int ret;
-
- link = device_link_add(dev, &domain->dev, DL_FLAG_SYNC_STATE_ONLY);
- if (!link)
- dev_dbg(&domain->dev, "failed to create device link for %s\n",
- dev_name(dev));
-
- /* If this is not the first device to attach there is nothing to do */
- if (domain->device_count)
- return 0;
-
- ret = zynqmp_pm_request_node(pd->node_id, 0, 0,
- ZYNQMP_PM_REQUEST_ACK_BLOCKING);
- if (ret) {
- dev_err(&domain->dev, "%s request failed for node %d: %d\n",
- domain->name, pd->node_id, ret);
- return ret;
- }
-
- pd->requested = true;
-
- dev_dbg(&domain->dev, "%s requested PM node id %d\n",
- dev_name(dev), pd->node_id);
-
- return 0;
-}
-
-/**
- * zynqmp_gpd_detach_dev() - Detach device from the PM domain
- * @domain: Generic PM domain
- * @dev: Device to detach
- */
-static void zynqmp_gpd_detach_dev(struct generic_pm_domain *domain,
- struct device *dev)
-{
- struct zynqmp_pm_domain *pd = to_zynqmp_pm_domain(domain);
- int ret;
-
- /* If this is not the last device to detach there is nothing to do */
- if (domain->device_count)
- return;
-
- ret = zynqmp_pm_release_node(pd->node_id);
- if (ret) {
- dev_err(&domain->dev, "failed to release PM node id %d: %d\n",
- pd->node_id, ret);
- return;
- }
-
- pd->requested = false;
-
- dev_dbg(&domain->dev, "%s released PM node id %d\n",
- dev_name(dev), pd->node_id);
-}
-
-static struct generic_pm_domain *zynqmp_gpd_xlate
- (struct of_phandle_args *genpdspec, void *data)
-{
- struct genpd_onecell_data *genpd_data = data;
- unsigned int i, idx = genpdspec->args[0];
- struct zynqmp_pm_domain *pd;
-
- pd = to_zynqmp_pm_domain(genpd_data->domains[0]);
-
- if (genpdspec->args_count != 1)
- return ERR_PTR(-EINVAL);
-
- /* Check for existing pm domains */
- for (i = 0; i < ZYNQMP_NUM_DOMAINS; i++) {
- if (pd[i].node_id == idx)
- goto done;
- }
-
- /*
- * Add index in empty node_id of power domain list as no existing
- * power domain found for current index.
- */
- for (i = 0; i < ZYNQMP_NUM_DOMAINS; i++) {
- if (pd[i].node_id == 0) {
- pd[i].node_id = idx;
- break;
- }
- }
-
-done:
- if (!genpd_data->domains[i] || i == ZYNQMP_NUM_DOMAINS)
- return ERR_PTR(-ENOENT);
-
- return genpd_data->domains[i];
-}
-
-static int zynqmp_gpd_probe(struct platform_device *pdev)
-{
- int i;
- struct genpd_onecell_data *zynqmp_pd_data;
- struct generic_pm_domain **domains;
- struct zynqmp_pm_domain *pd;
- struct device *dev = &pdev->dev;
-
- pd = devm_kcalloc(dev, ZYNQMP_NUM_DOMAINS, sizeof(*pd), GFP_KERNEL);
- if (!pd)
- return -ENOMEM;
-
- zynqmp_pd_data = devm_kzalloc(dev, sizeof(*zynqmp_pd_data), GFP_KERNEL);
- if (!zynqmp_pd_data)
- return -ENOMEM;
-
- zynqmp_pd_data->xlate = zynqmp_gpd_xlate;
-
- domains = devm_kcalloc(dev, ZYNQMP_NUM_DOMAINS, sizeof(*domains),
- GFP_KERNEL);
- if (!domains)
- return -ENOMEM;
-
- if (!of_device_is_compatible(dev->parent->of_node,
- "xlnx,zynqmp-firmware"))
- min_capability = ZYNQMP_PM_CAPABILITY_UNUSABLE;
-
- for (i = 0; i < ZYNQMP_NUM_DOMAINS; i++, pd++) {
- pd->node_id = 0;
- pd->gpd.name = kasprintf(GFP_KERNEL, "domain%d", i);
- pd->gpd.power_off = zynqmp_gpd_power_off;
- pd->gpd.power_on = zynqmp_gpd_power_on;
- pd->gpd.attach_dev = zynqmp_gpd_attach_dev;
- pd->gpd.detach_dev = zynqmp_gpd_detach_dev;
-
- domains[i] = &pd->gpd;
-
- /* Mark all PM domains as initially powered off */
- pm_genpd_init(&pd->gpd, NULL, true);
- }
-
- zynqmp_pd_data->domains = domains;
- zynqmp_pd_data->num_domains = ZYNQMP_NUM_DOMAINS;
- of_genpd_add_provider_onecell(dev->parent->of_node, zynqmp_pd_data);
-
- return 0;
-}
-
-static int zynqmp_gpd_remove(struct platform_device *pdev)
-{
- of_genpd_del_provider(pdev->dev.parent->of_node);
-
- return 0;
-}
-
-static void zynqmp_gpd_sync_state(struct device *dev)
-{
- int ret;
-
- ret = zynqmp_pm_init_finalize();
- if (ret)
- dev_warn(dev, "failed to release power management to firmware\n");
-}
-
-static struct platform_driver zynqmp_power_domain_driver = {
- .driver = {
- .name = "zynqmp_power_controller",
- .sync_state = zynqmp_gpd_sync_state,
- },
- .probe = zynqmp_gpd_probe,
- .remove = zynqmp_gpd_remove,
-};
-module_platform_driver(zynqmp_power_domain_driver);
-
-MODULE_ALIAS("platform:zynqmp_power_controller");
generated by cgit v1.2.3 (git 2.39.0) at 2024-08-05 17:00:20 +0300