Adding upstream version 6.7.7.upstream/6.7.7

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

3 files changed, 37 insertions, 39 deletions

diff --git a/drivers/hte/Kconfig b/drivers/hte/Kconfig
index cf29e0218b..641af722b5 100644
--- a/drivers/hte/Kconfig
+++ b/drivers/hte/Kconfig
@@ -16,7 +16,8 @@ if HTE
 
 config HTE_TEGRA194
 	tristate "NVIDIA Tegra194 HTE Support"
-	depends on ARCH_TEGRA_194_SOC
+	depends on (ARCH_TEGRA_194_SOC || COMPILE_TEST)
+	depends on GPIOLIB
 	help
 	  Enable this option for integrated hardware timestamping engine also
 	  known as generic timestamping engine (GTE) support on NVIDIA Tegra194
@@ -25,7 +26,7 @@ config HTE_TEGRA194
 
 config HTE_TEGRA194_TEST
         tristate "NVIDIA Tegra194 HTE Test"
-        depends on HTE_TEGRA194
+        depends on (HTE_TEGRA194 || COMPILE_TEST)
         help
 	  The NVIDIA Tegra194 GTE test driver demonstrates how to use HTE
 	  framework to timestamp GPIO and LIC IRQ lines.
diff --git a/drivers/hte/hte-tegra194.c b/drivers/hte/hte-tegra194.c
index 6fe6897047..690eb9be30 100644
--- a/drivers/hte/hte-tegra194.c
+++ b/drivers/hte/hte-tegra194.c
@@ -132,7 +132,7 @@ struct tegra_hte_soc {
 	const struct tegra_hte_data *prov_data;
 	struct tegra_hte_line_data *line_data;
 	struct hte_chip *chip;
-	struct gpio_chip *c;
+	struct gpio_device *gdev;
 	void __iomem *regs;
 };
 
@@ -407,18 +407,21 @@ static int tegra_hte_line_xlate(struct hte_chip *gc,
 		return -EINVAL;
 
 	/*
+	 * GPIO consumers can access GPIOs in two ways:
 	 *
-	 * There are two paths GPIO consumers can take as follows:
-	 * 1) The consumer (gpiolib-cdev for example) which uses GPIO global
-	 * number which gets assigned run time.
-	 * 2) The consumer passing GPIO from the DT which is assigned
-	 * statically for example by using TEGRA194_AON_GPIO gpio DT binding.
+	 * 1) Using the global GPIO numberspace.
+	 *
+	 * This is the old, now DEPRECATED method and should not be used in
+	 * new code. TODO: Check if tegra is even concerned by this.
+	 *
+	 * 2) Using GPIO descriptors that can be assigned to consumer devices
+	 * using device-tree, ACPI or lookup tables.
 	 *
 	 * The code below addresses both the consumer use cases and maps into
 	 * HTE/GTE namespace.
 	 */
 	if (gs->prov_data->type == HTE_TEGRA_TYPE_GPIO && !args) {
-		line_id = desc->attr.line_id - gs->c->base;
+		line_id = desc->attr.line_id - gpio_device_get_base(gs->gdev);
 		map = gs->prov_data->map;
 		map_sz = gs->prov_data->map_sz;
 	} else if (gs->prov_data->type == HTE_TEGRA_TYPE_GPIO && args) {
@@ -645,7 +648,7 @@ static bool tegra_hte_match_from_linedata(const struct hte_chip *chip,
 	if (!hte_dev || (hte_dev->prov_data->type != HTE_TEGRA_TYPE_GPIO))
 		return false;
 
-	return hte_dev->c == gpiod_to_chip(hdesc->attr.line_data);
+	return hte_dev->gdev == gpiod_to_gpio_device(hdesc->attr.line_data);
 }
 
 static const struct of_device_id tegra_hte_of_match[] = {
@@ -673,14 +676,11 @@ static void tegra_gte_disable(void *data)
 	tegra_hte_writel(gs, HTE_TECTRL, 0);
 }
 
-static int tegra_get_gpiochip_from_name(struct gpio_chip *chip, void *data)
+static void tegra_hte_put_gpio_device(void *data)
 {
-	return !strcmp(chip->label, data);
-}
+	struct gpio_device *gdev = data;
 
-static int tegra_gpiochip_match(struct gpio_chip *chip, void *data)
-{
-	return chip->fwnode == of_node_to_fwnode(data);
+	gpio_device_put(gdev);
 }
 
 static int tegra_hte_probe(struct platform_device *pdev)
@@ -728,10 +728,8 @@ static int tegra_hte_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	ret = platform_get_irq(pdev, 0);
-	if (ret < 0) {
-		dev_err_probe(dev, ret, "failed to get irq\n");
+	if (ret < 0)
 		return ret;
-	}
 	hte_dev->hte_irq = ret;
 	ret = devm_request_irq(dev, hte_dev->hte_irq, tegra_hte_isr, 0,
 			       dev_name(dev), hte_dev);
@@ -760,8 +758,8 @@ static int tegra_hte_probe(struct platform_device *pdev)
 
 		if (of_device_is_compatible(dev->of_node,
 					    "nvidia,tegra194-gte-aon")) {
-			hte_dev->c = gpiochip_find("tegra194-gpio-aon",
-						tegra_get_gpiochip_from_name);
+			hte_dev->gdev =
+				gpio_device_find_by_label("tegra194-gpio-aon");
 		} else {
 			gpio_ctrl = of_parse_phandle(dev->of_node,
 						     "nvidia,gpio-controller",
@@ -772,14 +770,19 @@ static int tegra_hte_probe(struct platform_device *pdev)
 				return -ENODEV;
 			}
 
-			hte_dev->c = gpiochip_find(gpio_ctrl,
-						   tegra_gpiochip_match);
+			hte_dev->gdev =
+				gpio_device_find_by_fwnode(of_fwnode_handle(gpio_ctrl));
 			of_node_put(gpio_ctrl);
 		}
 
-		if (!hte_dev->c)
+		if (!hte_dev->gdev)
 			return dev_err_probe(dev, -EPROBE_DEFER,
 					     "wait for gpio controller\n");
+
+		ret = devm_add_action_or_reset(dev, tegra_hte_put_gpio_device,
+					       hte_dev->gdev);
+		if (ret)
+			return ret;
 	}
 
 	hte_dev->chip = gc;
@@ -809,7 +812,7 @@ static int tegra_hte_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static int __maybe_unused tegra_hte_resume_early(struct device *dev)
+static int tegra_hte_resume_early(struct device *dev)
 {
 	u32 i;
 	struct tegra_hte_soc *gs = dev_get_drvdata(dev);
@@ -830,7 +833,7 @@ static int __maybe_unused tegra_hte_resume_early(struct device *dev)
 	return 0;
 }
 
-static int __maybe_unused tegra_hte_suspend_late(struct device *dev)
+static int tegra_hte_suspend_late(struct device *dev)
 {
 	u32 i;
 	struct tegra_hte_soc *gs = dev_get_drvdata(dev);
@@ -850,15 +853,14 @@ static int __maybe_unused tegra_hte_suspend_late(struct device *dev)
 }
 
 static const struct dev_pm_ops tegra_hte_pm = {
-	SET_LATE_SYSTEM_SLEEP_PM_OPS(tegra_hte_suspend_late,
-				     tegra_hte_resume_early)
+	LATE_SYSTEM_SLEEP_PM_OPS(tegra_hte_suspend_late, tegra_hte_resume_early)
 };
 
 static struct platform_driver tegra_hte_driver = {
 	.probe = tegra_hte_probe,
 	.driver = {
 		.name = "tegra_hte",
-		.pm = &tegra_hte_pm,
+		.pm = pm_sleep_ptr(&tegra_hte_pm),
 		.of_match_table = tegra_hte_of_match,
 	},
 };
diff --git a/drivers/hte/hte.c b/drivers/hte/hte.c
index 598a716b73..23a6eeb8c5 100644
--- a/drivers/hte/hte.c
+++ b/drivers/hte/hte.c
@@ -17,8 +17,6 @@
 #include <linux/debugfs.h>
 #include <linux/device.h>
 
-#define HTE_TS_NAME_LEN		10
-
 /* Global list of the HTE devices */
 static DEFINE_SPINLOCK(hte_lock);
 static LIST_HEAD(hte_devices);
@@ -88,7 +86,7 @@ struct hte_device {
 	struct list_head list;
 	struct hte_chip *chip;
 	struct module *owner;
-	struct hte_ts_info ei[];
+	struct hte_ts_info ei[] __counted_by(nlines);
 };
 
 #ifdef CONFIG_DEBUG_FS
@@ -389,13 +387,10 @@ static int __hte_req_ts(struct hte_ts_desc *desc, hte_ts_cb_t cb,
 
 	atomic_inc(&gdev->ts_req);
 
-	ei->line_name = NULL;
-	if (!desc->attr.name) {
-		ei->line_name = kzalloc(HTE_TS_NAME_LEN, GFP_KERNEL);
-		if (ei->line_name)
-			scnprintf(ei->line_name, HTE_TS_NAME_LEN, "ts_%u",
-				  desc->attr.line_id);
-	}
+	if (desc->attr.name)
+		ei->line_name = NULL;
+	else
+		ei->line_name = kasprintf(GFP_KERNEL, "ts_%u", desc->attr.line_id);
 
 	hte_ts_dbgfs_init(desc->attr.name == NULL ?
 			  ei->line_name : desc->attr.name, ei);