nvidia-oot: remove gte driver

HTE driver will be used instead of GTE. Remove GTE sources.

Bug 3961133

Change-Id: I379198da9c1896aa44043195a8c30b377b08c7c4
Signed-off-by: Gautham Srinivasan <gauthams@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/3067352
Reviewed-by: Jon Hunter <jonathanh@nvidia.com>
GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>

drivers/Makefile

@@ -1,5 +1,5 @@
 # SPDX-License-Identifier: GPL-2.0-only
-# SPDX-FileCopyrightText: Copyright (c) 2022-2023 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+# SPDX-FileCopyrightText: Copyright (c) 2022-2024 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
 
 LINUXINCLUDE += -I$(srctree.nvidia-oot)/include
 LINUXINCLUDE += -I$(srctree.nvidia-oot)/drivers/gpu/host1x/hw/
@@ -79,7 +79,5 @@ obj-m += virt/tegra/
 ifdef CONFIG_TEGRA_HOST1X
 obj-m += media/
 endif
-obj-m += staging/platform/tegra/gte/
-obj-m += staging/platform/tegra/gte_test/
 obj-m += nv-virtio/
 obj-m += usb/

drivers/staging/platform/tegra/gte/Makefile

@@ -1,4 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0-only
-# Copyright (c) 2023, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
-
-obj-m	+= tegra194_gte.o

drivers/staging/platform/tegra/gte_test/Makefile

@@ -1,4 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0-only
-# Copyright (c) 2023, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
-
-obj-m	+= tegra194_gte_test.o

drivers/staging/platform/tegra/gte_test/tegra194_gte_test.c

@@ -1,356 +0,0 @@
-/*
- * Copyright (c) 2020-2023, NVIDIA CORPORATION & AFFILIATES.All rights reserved.
- *
- * SPDX-License-Identifier: GPL-2.0
- */
-
-#include <linux/version.h>
-#include <linux/err.h>
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/interrupt.h>
-#include <linux/tegra-gte.h>
-#include <linux/gpio.h>
-#include <linux/timer.h>
-#include <linux/of.h>
-
-/*
- * Sample GTE test driver demonstrating GTE API usage.
- *
- * Sample drivers monitors LIC IRQ provided by lic_irq module parameter and
- * GPIO provided by gpio_in parameter.
- *
- * Note: gpio_out and gpio_in need to be shorted externally using some wire
- * in order for this test driver to work for the GPIO monitoring.
- */
-
-/*
- * This represents global ID of the GPIO since global ID or logical
- * partitioning of the GPIOs across various GPIO controller happens
- * at the run time, user has to provide this parameter in order to
- * request.
- *
- * gpio_in will be used in GTE to monitor the event and will be configured
- * as input.
- */
-static int gpio_in = -EINVAL;
-module_param(gpio_in, int, 0660);
-
-/*
- * Same comment as gpio_in but will be used as output and to toggle gpio_in
- * state.
- */
-static int gpio_out = -EINVAL;
-module_param(gpio_out, int, 0660);
-
-/* IRQ number to monitor */
-static int lic_irq = -EINVAL;
-module_param(lic_irq, int, 0660);
-
-static struct tegra_gte_test {
-	struct tegra_gte_ev_desc *data_lic;
-	struct tegra_gte_ev_desc *data_gpio;
-	int gpio_in_irq;
-	struct timer_list timer;
-	struct kobject *kobj;
-} gte;
-
-/*
- * Sysfs attribute to register/unregister GTE gpio event for 1 and 0 values
- */
-static ssize_t store_gpio_en_dis(struct kobject *kobj,
-				 struct kobj_attribute *attr,
-				 const char *buf, size_t count)
-{
-	int ret = count;
-	unsigned long val = 0;
-	struct device_node *np;
-	np = of_find_compatible_node(NULL, NULL, "nvidia,tegra194-gte-aon");
-
-	if (!np) {
-		np = of_find_compatible_node(NULL, NULL, "nvidia,tegra234-gte-aon");
-		if (!np) {
-			pr_err("Could not locate aon gte node\n");
-			return -EINVAL;
-		}
-	}
-
-	if (kstrtoul(buf, 10, &val) < 0) {
-		ret = -EINVAL;
-		goto error;
-	}
-
-	if (val == 1) {
-		if (gte.data_gpio) {
-			pr_info("gpio_in is already registered\n");
-			ret = -EEXIST;
-			goto error;
-		}
-		gte.data_gpio = tegra_gte_register_event(np, gpio_in);
-		if (IS_ERR(gte.data_gpio)) {
-			pr_err("Could not register gpio\n");
-			ret = PTR_ERR(gte.data_gpio);
-			gte.data_gpio = NULL;
-			goto error;
-		}
-	} else if (val == 0) {
-		if (!gte.data_gpio) {
-			pr_info("gpio_in is not registered\n");
-			ret = -EINVAL;
-			goto error;
-		}
-		ret = tegra_gte_unregister_event(gte.data_gpio);
-		if (ret == -EBUSY) {
-			/* User should retry */
-			pr_err("failed to unregister gpio in\n");
-			goto error;
-		} else { /* For anything else set data to null */
-			gte.data_gpio = NULL;
-			if (ret == 0)
-				ret = count;
-		}
-	} else {
-		ret = -EINVAL;
-	}
-
-error:
-	of_node_put(np);
-	return ret;
-}
-
-/*
- * Sysfs attribute to register/unregister GTE LIC IRQ event for 1 and 0 values
- */
-static ssize_t store_lic_irq_en_dis(struct kobject *kobj,
-				    struct kobj_attribute *attr,
-				    const char *buf, size_t count)
-{
-	int ret = count;
-	unsigned long val = 0;
-	struct device_node *np;
-	np = of_find_compatible_node(NULL, NULL, "nvidia,tegra194-gte-lic");
-
-	if (!np) {
-		pr_err("Could not locate lic gte node\n");
-		return -EINVAL;
-	}
-
-	if (kstrtoul(buf, 10, &val) < 0) {
-		ret = -EINVAL;
-		goto error;
-	}
-
-	if (val == 1) {
-		if (gte.data_lic) {
-			pr_info("lic_irq is already registered\n");
-			ret = -EEXIST;
-			goto error;
-		}
-		gte.data_lic = tegra_gte_register_event(np, lic_irq);
-		if (IS_ERR(gte.data_lic)) {
-			pr_err("Could not register lic irq\n");
-			ret = PTR_ERR(gte.data_lic);
-			gte.data_lic = NULL;
-			goto error;
-		}
-	} else if (val == 0) {
-		if (!gte.data_lic) {
-			pr_info("lic_irq is not registered\n");
-			ret = -EINVAL;
-			goto error;
-		}
-		ret = tegra_gte_unregister_event(gte.data_lic);
-		if (ret == -EBUSY) {
-			/* User should retry */
-			pr_err("failed to unregister lic irq\n");
-			goto error;
-		} else { /* For anything else set data to null */
-			gte.data_lic = NULL;
-			if (ret == 0)
-				ret = count;
-		}
-	} else {
-		ret = -EINVAL;
-	}
-
-error:
-	of_node_put(np);
-	return ret;
-}
-
-/* Shows LIC event timestamp information */
-static ssize_t show_lic_irq_ts(struct kobject *kobj,
-				   struct kobj_attribute *attr,
-				   char *buf)
-{
-	struct tegra_gte_ev_detail hts;
-
-	if (tegra_gte_retrieve_event((gte.data_lic), &hts) != 0)
-		return -EINVAL;
-
-	pr_debug("Retrieved lic event ts_raw: %llu, ts_ns %llu\n",
-		 hts.ts_raw, hts.ts_ns);
-	return scnprintf(buf, PAGE_SIZE, "ts_raw: %llu, ts_ns: %llu\n",
-			 hts.ts_raw, hts.ts_ns);
-}
-
-static struct kobj_attribute gpio_en_dis_attr =
-		__ATTR(gpio_en_dis, 0220, NULL, store_gpio_en_dis);
-static struct kobj_attribute lic_irq_en_dis_attr =
-		__ATTR(lic_irq_en_dis, 0220, NULL, store_lic_irq_en_dis);
-static struct kobj_attribute lic_irq_ts_attr =
-		__ATTR(lic_irq_ts, 0440, show_lic_irq_ts, NULL);
-
-static struct attribute *attrs[] = {
-	&gpio_en_dis_attr.attr,
-	&lic_irq_en_dis_attr.attr,
-	&lic_irq_ts_attr.attr,
-	NULL,
-};
-
-static struct attribute_group tegra_gte_test_attr_group = {
-	.attrs = attrs,
-};
-
-static int tegra_gte_test_sysfs_create(void)
-{
-	int ret;
-
-	/* Creates object under /sys/kernel/ */
-	gte.kobj = kobject_create_and_add("tegra_gte_test", kernel_kobj);
-	if (!gte.kobj)
-		return -ENOMEM;
-
-	ret = sysfs_create_group(gte.kobj, &tegra_gte_test_attr_group);
-	if (ret)
-		kobject_put(gte.kobj);
-	return ret;
-}
-
-#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 15, 0)
-static void gpio_timer_cb(unsigned long data)
-#else
-static void gpio_timer_cb(struct timer_list *t)
-#endif
-{
-	gpio_set_value(gpio_out, !gpio_get_value(gpio_out));
-	mod_timer(&gte.timer, jiffies + msecs_to_jiffies(5000));
-}
-
-static irqreturn_t tegra_gte_test_gpio_isr(int irq, void *data)
-{
-	struct tegra_gte_ev_detail hts;
-	struct tegra_gte_test *gte = data;
-
-	if (tegra_gte_retrieve_event((gte->data_gpio), &hts) != 0) {
-		pr_info("No timestamp available\n");
-		return IRQ_HANDLED;
-	}
-
-	pr_info("GPIO HW Timestamp: raw %llu, ns %llu\n",
-		 hts.ts_raw, hts.ts_ns);
-	return IRQ_HANDLED;
-}
-
-static int __init tegra_gte_test_init(void)
-{
-	int ret = 0;
-
-	if (gpio_out == -EINVAL || gpio_in == -EINVAL || lic_irq == EINVAL) {
-		pr_err("Invalid gpio_out, gpio_in and irq\n");
-		return -EINVAL;
-	}
-
-	gte.data_lic = NULL;
-	gte.data_gpio = NULL;
-
-	ret = gpio_request(gpio_out, "gte_test_gpio_out");
-	if (ret) {
-		pr_err("failed request gpio out\n");
-		return -EINVAL;
-	}
-
-	ret = gpio_direction_output(gpio_out, 0);
-	if (ret) {
-		pr_err("failed to set pin direction\n");
-		ret = -EINVAL;
-		goto free_gpio_out;
-	}
-
-	ret = gpio_request(gpio_in, "gte_test_gpio_in");
-	if (ret) {
-		pr_err("failed to request gpio in\n");
-		ret = -EINVAL;
-		goto free_gpio_out;
-	}
-
-	ret = gpio_direction_input(gpio_in);
-	if (ret) {
-		pr_err("failed to set pin direction\n");
-		ret = -EINVAL;
-		goto free_gpio_in;
-
-	}
-
-	/* IRQ setup */
-	ret = gpio_to_irq(gpio_in);
-	if (ret < 0) {
-		pr_err("failed to map GPIO to IRQ: %d\n", ret);
-		ret = -EINVAL;
-		goto free_gpio_in;
-	}
-
-	gte.gpio_in_irq = ret;
-
-	ret = request_irq(ret, tegra_gte_test_gpio_isr,
-			 IRQF_TRIGGER_RISING | IRQF_NO_THREAD,
-			 "tegra_gte_test_isr", &gte);
-	if (ret) {
-		pr_err("failed to acquire IRQ\n");
-		ret = -EINVAL;
-		goto free_gpio_in;
-	}
-
-	ret = tegra_gte_test_sysfs_create();
-	if (ret != 0) {
-		pr_err("sysfs creation failed\n");
-		ret = -EINVAL;
-		goto free_irq;
-	}
-
-#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 15, 0)
-	setup_timer(&gte.timer, gpio_timer_cb, 0);
-#else
-	timer_setup(&gte.timer, gpio_timer_cb, 0);
-#endif
-
-	mod_timer(&gte.timer, jiffies + msecs_to_jiffies(5000));
-
-	return 0;
-
-free_irq:
-	free_irq(gte.gpio_in_irq, &gte);
-free_gpio_in:
-	gpio_free(gpio_in);
-free_gpio_out:
-	gpio_free(gpio_out);
-
-	return ret;
-}
-
-static void __exit tegra_gte_test_exit(void)
-{
-	free_irq(gte.gpio_in_irq, &gte);
-	gpio_free(gpio_in);
-	gpio_free(gpio_out);
-	tegra_gte_unregister_event(gte.data_gpio);
-	tegra_gte_unregister_event(gte.data_lic);
-	kobject_put(gte.kobj);
-	del_timer(&gte.timer);
-}
-
-module_init(tegra_gte_test_init);
-module_exit(tegra_gte_test_exit);
-MODULE_AUTHOR("Dipen Patel <dipenp@nvidia.com>");
-MODULE_DESCRIPTION("NVIDIA Tegra GTE driver test");
-MODULE_LICENSE("GPL v2");