add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/irqchip/irq-gic-pm.c
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..
@@ -1,17 +1,6 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * Copyright (C) 2016 NVIDIA CORPORATION, All Rights Reserved.
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License version 2 as
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- * published by the Free Software Foundation.
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- *
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- * This program is distributed in the hope that it will be useful,
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- * but WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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- * GNU General Public License for more details.
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- *
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- * You should have received a copy of the GNU General Public License
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- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
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  */
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 #include <linux/module.h>
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 #include <linux/clk.h>
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..
@@ -19,7 +8,6 @@
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 #include <linux/of_irq.h>
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 #include <linux/irqchip/arm-gic.h>
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 #include <linux/platform_device.h>
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-#include <linux/pm_clock.h>
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 #include <linux/pm_runtime.h>
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 #include <linux/slab.h>
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13
 
..
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@@ -28,17 +16,27 @@
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 	const char *const *clocks;
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 };
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18
 
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+struct gic_chip_pm {
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+	struct gic_chip_data *chip_data;
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+	const struct gic_clk_data *clk_data;
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+	struct clk_bulk_data *clks;
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+};
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+
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 static int gic_runtime_resume(struct device *dev)
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 {
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-	struct gic_chip_data *gic = dev_get_drvdata(dev);
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+	struct gic_chip_pm *chip_pm = dev_get_drvdata(dev);
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+	struct gic_chip_data *gic = chip_pm->chip_data;
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+	const struct gic_clk_data *data = chip_pm->clk_data;
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 	int ret;
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-	ret = pm_clk_resume(dev);
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-	if (ret)
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+	ret = clk_bulk_prepare_enable(data->num_clocks, chip_pm->clks);
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+	if (ret) {
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+		dev_err(dev, "clk_enable failed: %d\n", ret);
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 		return ret;
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+	}
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37
 
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 	/*
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-	 * On the very first resume, the pointer to the driver data
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+	 * On the very first resume, the pointer to chip_pm->chip_data
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 	 * will be NULL and this is intentional, because we do not
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 	 * want to restore the GIC on the very first resume. So if
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 	 * the pointer is not valid just return.
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@@ -54,35 +52,14 @@
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52
 
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 static int gic_runtime_suspend(struct device *dev)
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 {
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-	struct gic_chip_data *gic = dev_get_drvdata(dev);
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+	struct gic_chip_pm *chip_pm = dev_get_drvdata(dev);
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+	struct gic_chip_data *gic = chip_pm->chip_data;
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+	const struct gic_clk_data *data = chip_pm->clk_data;
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58
 
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 	gic_dist_save(gic);
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 	gic_cpu_save(gic);
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61
 
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-	return pm_clk_suspend(dev);
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-}
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-
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-static int gic_get_clocks(struct device *dev, const struct gic_clk_data *data)
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-{
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-	unsigned int i;
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-	int ret;
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-
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-	if (!dev || !data)
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-		return -EINVAL;
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-
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-	ret = pm_clk_create(dev);
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-	if (ret)
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-		return ret;
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-
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-	for (i = 0; i < data->num_clocks; i++) {
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-		ret = of_pm_clk_add_clk(dev, data->clocks[i]);
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-		if (ret) {
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-			dev_err(dev, "failed to add clock %s\n",
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-				data->clocks[i]);
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-			pm_clk_destroy(dev);
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-			return ret;
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-		}
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-	}
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+	clk_bulk_disable_unprepare(data->num_clocks, chip_pm->clks);
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 	return 0;
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 }
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@@ -91,8 +68,8 @@
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 {
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 	struct device *dev = &pdev->dev;
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 	const struct gic_clk_data *data;
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-	struct gic_chip_data *gic;
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-	int ret, irq;
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+	struct gic_chip_pm *chip_pm;
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+	int ret, irq, i;
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 	data = of_device_get_match_data(&pdev->dev);
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 	if (!data) {
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@@ -100,27 +77,40 @@
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 		return -ENODEV;
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 	}
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+	chip_pm = devm_kzalloc(dev, sizeof(*chip_pm), GFP_KERNEL);
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+	if (!chip_pm)
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+		return -ENOMEM;
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+
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 	irq = irq_of_parse_and_map(dev->of_node, 0);
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 	if (!irq) {
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 		dev_err(dev, "no parent interrupt found!\n");
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 		return -EINVAL;
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 	}
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-	ret = gic_get_clocks(dev, data);
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+	chip_pm->clks = devm_kcalloc(dev, data->num_clocks,
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+				     sizeof(*chip_pm->clks), GFP_KERNEL);
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+	if (!chip_pm->clks)
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+		return -ENOMEM;
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+
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+	for (i = 0; i < data->num_clocks; i++)
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+		chip_pm->clks[i].id = data->clocks[i];
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+
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+	ret = devm_clk_bulk_get(dev, data->num_clocks, chip_pm->clks);
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 	if (ret)
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 		goto irq_dispose;
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+	chip_pm->clk_data = data;
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+	dev_set_drvdata(dev, chip_pm);
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+
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 	pm_runtime_enable(dev);
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-	ret = pm_runtime_get_sync(dev);
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+	ret = pm_runtime_resume_and_get(dev);
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 	if (ret < 0)
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 		goto rpm_disable;
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-	ret = gic_of_init_child(dev, &gic, irq);
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+	ret = gic_of_init_child(dev, &chip_pm->chip_data, irq);
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 	if (ret)
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 		goto rpm_put;
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-
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-	platform_set_drvdata(pdev, gic);
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 	pm_runtime_put(dev);
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@@ -132,7 +122,6 @@
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 	pm_runtime_put_sync(dev);
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 rpm_disable:
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 	pm_runtime_disable(dev);
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-	pm_clk_destroy(dev);
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 irq_dispose:
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 	irq_dispose_mapping(irq);
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@@ -142,6 +131,8 @@
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 static const struct dev_pm_ops gic_pm_ops = {
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 	SET_RUNTIME_PM_OPS(gic_runtime_suspend,
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 			   gic_runtime_resume, NULL)
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+	SET_LATE_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
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+				     pm_runtime_force_resume)
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 };
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 static const char * const gic400_clocks[] = {