soc: xilinx: Move power-domain driver to the genpd dir

To simplify with maintenance let's move the xilinx power-domain driver to
the new genpd directory. Going forward, patches are intended to be managed
through a separate git tree, according to MAINTAINERS.

Cc: Michal Simek <michal.simek@amd.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

2 files changed, 0 insertions, 323 deletions

diff --git a/drivers/soc/xilinx/Makefile b/drivers/soc/xilinx/Makefile
index 41e585bc9c67..33d94395fd87 100644
--- a/drivers/soc/xilinx/Makefile
+++ b/drivers/soc/xilinx/Makefile
@@ -1,4 +1,3 @@
 # SPDX-License-Identifier: GPL-2.0
 obj-$(CONFIG_ZYNQMP_POWER)	+= zynqmp_power.o
-obj-$(CONFIG_ZYNQMP_PM_DOMAINS) += zynqmp_pm_domains.o
 obj-$(CONFIG_XLNX_EVENT_MANAGER)	+= xlnx_event_manager.o
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");