[PATCH v2 4/4] drivers: firmware: xilinx: Add debugfs interface
Jolly Shah
jolly.shah at xilinx.com
Wed Jan 17 12:20:34 PST 2018
Firmware-debug provides debugfs interface to all APIs.
Signed-off-by: Jolly Shah <jollys at xilinx.com>
Signed-off-by: Rajan Vaja <rajanv at xilinx.com>
---
drivers/firmware/xilinx/zynqmp/Kconfig | 7 +
drivers/firmware/xilinx/zynqmp/Makefile | 1 +
drivers/firmware/xilinx/zynqmp/firmware-debug.c | 524 +++++++++++++++++++++
drivers/firmware/xilinx/zynqmp/firmware.c | 11 +-
.../linux/firmware/xilinx/zynqmp/firmware-debug.h | 31 ++
5 files changed, 573 insertions(+), 1 deletion(-)
create mode 100644 drivers/firmware/xilinx/zynqmp/firmware-debug.c
create mode 100644 include/linux/firmware/xilinx/zynqmp/firmware-debug.h
diff --git a/drivers/firmware/xilinx/zynqmp/Kconfig b/drivers/firmware/xilinx/zynqmp/Kconfig
index 8f7709d..bdd0188 100644
--- a/drivers/firmware/xilinx/zynqmp/Kconfig
+++ b/drivers/firmware/xilinx/zynqmp/Kconfig
@@ -13,4 +13,11 @@ config ZYNQMP_FIRMWARE
Say yes to enable zynqmp firmware interface driver.
In doubt, say N
+config ZYNQMP_FIRMWARE_DEBUG
+ bool "Enable Xilinx Zynq MPSoC firmware debug APIs"
+ default ARCH_ZYNQMP && ZYNQMP_FIRMWARE && DEBUG_FS
+ help
+ Say yes to enable zynqmp firmware interface debug APIs.
+ In doubt, say N
+
endmenu
diff --git a/drivers/firmware/xilinx/zynqmp/Makefile b/drivers/firmware/xilinx/zynqmp/Makefile
index 6629781..02f0c9a 100644
--- a/drivers/firmware/xilinx/zynqmp/Makefile
+++ b/drivers/firmware/xilinx/zynqmp/Makefile
@@ -2,3 +2,4 @@
# Makefile for Xilinx firmwares
obj-$(CONFIG_ZYNQMP_FIRMWARE) += firmware.o firmware-ggs.o
+obj-$(CONFIG_ZYNQMP_FIRMWARE_DEBUG) += firmware-debug.o
diff --git a/drivers/firmware/xilinx/zynqmp/firmware-debug.c b/drivers/firmware/xilinx/zynqmp/firmware-debug.c
new file mode 100644
index 0000000..7a9308d
--- /dev/null
+++ b/drivers/firmware/xilinx/zynqmp/firmware-debug.c
@@ -0,0 +1,524 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Xilinx Zynq MPSoC Firmware layer for debugfs APIs
+ *
+ * Copyright (C) 2014-2018 Xilinx, Inc.
+ *
+ * Michal Simek <michal.simek at xilinx.com>
+ * Davorin Mista <davorin.mista at aggios.com>
+ * Jolly Shah <jollys at xilinx.com>
+ * Rajan Vaja <rajanv at xilinx.com>
+ */
+
+#include <linux/compiler.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/debugfs.h>
+#include <linux/uaccess.h>
+#include <linux/firmware/xilinx/zynqmp/firmware.h>
+#include <linux/firmware/xilinx/zynqmp/firmware-debug.h>
+
+#define DRIVER_NAME "zynqmp-firmware"
+
+#define PM_API_NAME_LEN 50
+#define MAX_API_VERSION_RESP_LEN 50
+
+struct pm_api_info {
+ u32 api_id;
+ char api_name[PM_API_NAME_LEN];
+ char api_name_len;
+};
+
+#define PM_API(id) {id, #id, strlen(#id)}
+static struct pm_api_info pm_api_list[] = {
+ PM_API(PM_REQUEST_SUSPEND),
+ PM_API(PM_SELF_SUSPEND),
+ PM_API(PM_FORCE_POWERDOWN),
+ PM_API(PM_ABORT_SUSPEND),
+ PM_API(PM_REQUEST_WAKEUP),
+ PM_API(PM_SET_WAKEUP_SOURCE),
+ PM_API(PM_SYSTEM_SHUTDOWN),
+ PM_API(PM_REQUEST_NODE),
+ PM_API(PM_RELEASE_NODE),
+ PM_API(PM_SET_REQUIREMENT),
+ PM_API(PM_SET_MAX_LATENCY),
+ PM_API(PM_GET_API_VERSION),
+ PM_API(PM_SET_CONFIGURATION),
+ PM_API(PM_GET_NODE_STATUS),
+ PM_API(PM_GET_OPERATING_CHARACTERISTIC),
+ PM_API(PM_REGISTER_NOTIFIER),
+ PM_API(PM_RESET_ASSERT),
+ PM_API(PM_RESET_GET_STATUS),
+ PM_API(PM_MMIO_READ),
+ PM_API(PM_MMIO_WRITE),
+ PM_API(PM_GET_CHIPID),
+ PM_API(PM_PINCTRL_GET_FUNCTION),
+ PM_API(PM_PINCTRL_SET_FUNCTION),
+ PM_API(PM_PINCTRL_CONFIG_PARAM_GET),
+ PM_API(PM_PINCTRL_CONFIG_PARAM_SET),
+ PM_API(PM_IOCTL),
+ PM_API(PM_CLOCK_ENABLE),
+ PM_API(PM_CLOCK_DISABLE),
+ PM_API(PM_CLOCK_GETSTATE),
+ PM_API(PM_CLOCK_SETDIVIDER),
+ PM_API(PM_CLOCK_GETDIVIDER),
+ PM_API(PM_CLOCK_SETRATE),
+ PM_API(PM_CLOCK_GETRATE),
+ PM_API(PM_CLOCK_SETPARENT),
+ PM_API(PM_CLOCK_GETPARENT),
+ PM_API(PM_QUERY_DATA),
+};
+
+/**
+ * zynqmp_pm_self_suspend - PM call for master to suspend itself
+ * @node: Node ID of the master or subsystem
+ * @latency: Requested maximum wakeup latency (not supported)
+ * @state: Requested state (not supported)
+ *
+ * Return: Returns status, either success or error+reason
+ */
+int zynqmp_pm_self_suspend(const u32 node,
+ const u32 latency,
+ const u32 state)
+{
+ return invoke_pm_fn(PM_SELF_SUSPEND, node, latency, state, 0, NULL);
+}
+
+/**
+ * zynqmp_pm_abort_suspend - PM call to announce that a prior suspend request
+ * is to be aborted.
+ * @reason: Reason for the abort
+ *
+ * Return: Returns status, either success or error+reason
+ */
+int zynqmp_pm_abort_suspend(const enum zynqmp_pm_abort_reason reason)
+{
+ return invoke_pm_fn(PM_ABORT_SUSPEND, reason, 0, 0, 0, NULL);
+}
+
+/**
+ * zynqmp_pm_register_notifier - Register the PU to be notified of PM events
+ * @node: Node ID of the slave
+ * @event: The event to be notified about
+ * @wake: Wake up on event
+ * @enable: Enable or disable the notifier
+ *
+ * Return: Returns status, either success or error+reason
+ */
+int zynqmp_pm_register_notifier(const u32 node, const u32 event,
+ const u32 wake, const u32 enable)
+{
+ return invoke_pm_fn(PM_REGISTER_NOTIFIER, node, event,
+ wake, enable, NULL);
+}
+
+/**
+ * zynqmp_pm_argument_value - Extract argument value from a PM-API request
+ * @arg: Entered PM-API argument in string format
+ *
+ * Return: Argument value in unsigned integer format on success
+ * 0 otherwise
+ */
+static u64 zynqmp_pm_argument_value(char *arg)
+{
+ u64 value;
+
+ if (!arg)
+ return 0;
+
+ if (!kstrtou64(arg, 0, &value))
+ return value;
+
+ return 0;
+}
+
+static struct dentry *zynqmp_pm_debugfs_dir;
+static struct dentry *zynqmp_pm_debugfs_power;
+static struct dentry *zynqmp_pm_debugfs_api_version;
+
+static int get_pm_api_id(char *pm_api_req, u32 *pm_id)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(pm_api_list) ; i++) {
+ if (!strncasecmp(pm_api_req, pm_api_list[i].api_name,
+ pm_api_list[i].api_name_len)) {
+ *pm_id = pm_api_list[i].api_id;
+ break;
+ }
+ }
+
+ /* If no name was entered look for PM-API ID instead */
+ if (i == ARRAY_SIZE(pm_api_list) && kstrtouint(pm_api_req, 10, pm_id))
+ return -EINVAL;
+
+ return 0;
+}
+
+static int process_api_request(u32 pm_id, u64 *pm_api_arg, u32 *pm_api_ret)
+{
+ const struct zynqmp_eemi_ops *eemi_ops = get_eemi_ops();
+ u32 pm_api_version;
+ int ret;
+
+ if (!eemi_ops)
+ return -ENXIO;
+
+ switch (pm_id) {
+ case PM_GET_API_VERSION:
+ eemi_ops->get_api_version(&pm_api_version);
+ pr_info("%s PM-API Version = %d.%d\n", __func__,
+ pm_api_version >> 16, pm_api_version & 0xffff);
+ break;
+ case PM_REQUEST_SUSPEND:
+ ret = eemi_ops->request_suspend(pm_api_arg[0],
+ pm_api_arg[1] ? pm_api_arg[1] :
+ ZYNQMP_PM_REQUEST_ACK_NO,
+ pm_api_arg[2] ? pm_api_arg[2] :
+ ZYNQMP_PM_MAX_LATENCY, 0);
+ break;
+ case PM_SELF_SUSPEND:
+ ret = zynqmp_pm_self_suspend(pm_api_arg[0],
+ pm_api_arg[1] ? pm_api_arg[1] :
+ ZYNQMP_PM_MAX_LATENCY, 0);
+ break;
+ case PM_FORCE_POWERDOWN:
+ ret = eemi_ops->force_powerdown(pm_api_arg[0],
+ pm_api_arg[1] ? pm_api_arg[1] :
+ ZYNQMP_PM_REQUEST_ACK_NO);
+ break;
+ case PM_ABORT_SUSPEND:
+ ret = zynqmp_pm_abort_suspend(pm_api_arg[0] ? pm_api_arg[0] :
+ ZYNQMP_PM_ABORT_REASON_UNKNOWN);
+ break;
+ case PM_REQUEST_WAKEUP:
+ ret = eemi_ops->request_wakeup(pm_api_arg[0],
+ pm_api_arg[1], pm_api_arg[2],
+ pm_api_arg[3] ? pm_api_arg[3] :
+ ZYNQMP_PM_REQUEST_ACK_NO);
+ break;
+ case PM_SET_WAKEUP_SOURCE:
+ ret = eemi_ops->set_wakeup_source(pm_api_arg[0], pm_api_arg[1],
+ pm_api_arg[2]);
+ break;
+ case PM_SYSTEM_SHUTDOWN:
+ ret = eemi_ops->system_shutdown(pm_api_arg[0], pm_api_arg[1]);
+ break;
+ case PM_REQUEST_NODE:
+ ret = eemi_ops->request_node(pm_api_arg[0],
+ pm_api_arg[1] ? pm_api_arg[1] :
+ ZYNQMP_PM_CAPABILITY_ACCESS,
+ pm_api_arg[2] ? pm_api_arg[2] : 0,
+ pm_api_arg[3] ? pm_api_arg[3] :
+ ZYNQMP_PM_REQUEST_ACK_BLOCKING);
+ break;
+ case PM_RELEASE_NODE:
+ ret = eemi_ops->release_node(pm_api_arg[0]);
+ break;
+ case PM_SET_REQUIREMENT:
+ ret = eemi_ops->set_requirement(pm_api_arg[0],
+ pm_api_arg[1] ? pm_api_arg[1] :
+ ZYNQMP_PM_CAPABILITY_CONTEXT,
+ pm_api_arg[2] ?
+ pm_api_arg[2] : 0,
+ pm_api_arg[3] ? pm_api_arg[3] :
+ ZYNQMP_PM_REQUEST_ACK_BLOCKING);
+ break;
+ case PM_SET_MAX_LATENCY:
+ ret = eemi_ops->set_max_latency(pm_api_arg[0],
+ pm_api_arg[1] ? pm_api_arg[1] :
+ ZYNQMP_PM_MAX_LATENCY);
+ break;
+ case PM_SET_CONFIGURATION:
+ ret = eemi_ops->set_configuration(pm_api_arg[0]);
+ break;
+ case PM_GET_NODE_STATUS:
+ ret = eemi_ops->get_node_status(pm_api_arg[0],
+ &pm_api_ret[0],
+ &pm_api_ret[1],
+ &pm_api_ret[2]);
+ if (!ret)
+ pr_info("GET_NODE_STATUS:\n\tNodeId: %llu\n\tStatus: %u\n\tRequirements: %u\n\tUsage: %u\n",
+ pm_api_arg[0], pm_api_ret[0],
+ pm_api_ret[1], pm_api_ret[2]);
+ break;
+ case PM_GET_OPERATING_CHARACTERISTIC:
+ ret = eemi_ops->get_operating_characteristic(pm_api_arg[0],
+ pm_api_arg[1] ? pm_api_arg[1] :
+ ZYNQMP_PM_OPERATING_CHARACTERISTIC_POWER,
+ &pm_api_ret[0]);
+ if (!ret)
+ pr_info("GET_OPERATING_CHARACTERISTIC:\n\tNodeId: %llu\n\tType: %llu\n\tResult: %u\n",
+ pm_api_arg[0], pm_api_arg[1], pm_api_ret[0]);
+ break;
+ case PM_REGISTER_NOTIFIER:
+ ret = zynqmp_pm_register_notifier(pm_api_arg[0],
+ pm_api_arg[1] ?
+ pm_api_arg[1] : 0,
+ pm_api_arg[2] ?
+ pm_api_arg[2] : 0,
+ pm_api_arg[3] ?
+ pm_api_arg[3] : 0);
+ break;
+ case PM_RESET_ASSERT:
+ ret = eemi_ops->reset_assert(pm_api_arg[0], pm_api_arg[1]);
+ break;
+ case PM_RESET_GET_STATUS:
+ ret = eemi_ops->reset_get_status(pm_api_arg[0], &pm_api_ret[0]);
+ pr_info("%s Reset status: %u\n", __func__, pm_api_ret[0]);
+ break;
+ case PM_GET_CHIPID:
+ ret = eemi_ops->get_chipid(&pm_api_ret[0], &pm_api_ret[1]);
+ pr_info("%s idcode: %#x, version:%#x\n",
+ __func__, pm_api_ret[0], pm_api_ret[1]);
+ break;
+ case PM_PINCTRL_GET_FUNCTION:
+ ret = eemi_ops->pinctrl_get_function(pm_api_arg[0],
+ &pm_api_ret[0]);
+ pr_info("%s Current set function for the pin: %u\n",
+ __func__, pm_api_ret[0]);
+ break;
+ case PM_PINCTRL_SET_FUNCTION:
+ ret = eemi_ops->pinctrl_set_function(pm_api_arg[0],
+ pm_api_arg[1]);
+ break;
+ case PM_PINCTRL_CONFIG_PARAM_GET:
+ ret = eemi_ops->pinctrl_get_config(pm_api_arg[0], pm_api_arg[1],
+ &pm_api_ret[0]);
+ pr_info("%s pin: %llu, param: %llu, value: %u\n",
+ __func__, pm_api_arg[0], pm_api_arg[1],
+ pm_api_ret[0]);
+ break;
+ case PM_PINCTRL_CONFIG_PARAM_SET:
+ ret = eemi_ops->pinctrl_set_config(pm_api_arg[0],
+ pm_api_arg[1],
+ pm_api_arg[2]);
+ break;
+ case PM_IOCTL:
+ ret = eemi_ops->ioctl(pm_api_arg[0], pm_api_arg[1],
+ pm_api_arg[2], pm_api_arg[3],
+ &pm_api_ret[0]);
+ if (pm_api_arg[1] == IOCTL_GET_RPU_OPER_MODE ||
+ pm_api_arg[1] == IOCTL_GET_PLL_FRAC_MODE ||
+ pm_api_arg[1] == IOCTL_GET_PLL_FRAC_DATA ||
+ pm_api_arg[1] == IOCTL_READ_GGS ||
+ pm_api_arg[1] == IOCTL_READ_PGGS)
+ pr_info("%s Value: %u\n",
+ __func__, pm_api_ret[1]);
+ break;
+ case PM_CLOCK_ENABLE:
+ ret = eemi_ops->clock_enable(pm_api_arg[0]);
+ break;
+ case PM_CLOCK_DISABLE:
+ ret = eemi_ops->clock_disable(pm_api_arg[0]);
+ break;
+ case PM_CLOCK_GETSTATE:
+ ret = eemi_ops->clock_getstate(pm_api_arg[0], &pm_api_ret[0]);
+ pr_info("%s state: %u\n", __func__, pm_api_ret[0]);
+ break;
+ case PM_CLOCK_SETDIVIDER:
+ ret = eemi_ops->clock_setdivider(pm_api_arg[0], pm_api_arg[1]);
+ break;
+ case PM_CLOCK_GETDIVIDER:
+ ret = eemi_ops->clock_getdivider(pm_api_arg[0], &pm_api_ret[0]);
+ pr_info("%s Divider Value: %d\n", __func__, pm_api_ret[0]);
+ break;
+ case PM_CLOCK_SETRATE:
+ ret = eemi_ops->clock_setrate(pm_api_arg[0], pm_api_arg[1]);
+ break;
+ case PM_CLOCK_GETRATE:
+ ret = eemi_ops->clock_getrate(pm_api_arg[0], &pm_api_ret[0]);
+ pr_info("%s Rate Value: %u\n", __func__, pm_api_ret[0]);
+ break;
+ case PM_CLOCK_SETPARENT:
+ ret = eemi_ops->clock_setparent(pm_api_arg[0], pm_api_arg[1]);
+ break;
+ case PM_CLOCK_GETPARENT:
+ ret = eemi_ops->clock_getparent(pm_api_arg[0], &pm_api_ret[0]);
+ pr_info("%s Parent Index: %u\n", __func__, pm_api_ret[0]);
+ break;
+ case PM_QUERY_DATA:
+ {
+ struct zynqmp_pm_query_data qdata = {0};
+
+ qdata.qid = pm_api_arg[0];
+ qdata.arg1 = pm_api_arg[1];
+ qdata.arg2 = pm_api_arg[2];
+ qdata.arg3 = pm_api_arg[3];
+
+ ret = eemi_ops->query_data(qdata, pm_api_ret);
+
+ pr_info("%s: data[0] = 0x%08x\n", __func__, pm_api_ret[0]);
+ pr_info("%s: data[1] = 0x%08x\n", __func__, pm_api_ret[1]);
+ pr_info("%s: data[2] = 0x%08x\n", __func__, pm_api_ret[2]);
+ pr_info("%s: data[3] = 0x%08x\n", __func__, pm_api_ret[3]);
+ break;
+ }
+ default:
+ pr_err("%s Unsupported PM-API request\n", __func__);
+ ret = -EINVAL;
+ }
+
+ return ret;
+}
+
+/**
+ * zynqmp_pm_debugfs_api_write - debugfs write function
+ * @file: User file structure
+ * @ptr: User entered PM-API string
+ * @len: Length of the userspace buffer
+ * @off: Offset within the file
+ *
+ * Return: Number of bytes copied if PM-API request succeeds,
+ * the corresponding error code otherwise
+ *
+ * Used for triggering pm api functions by writing
+ * echo <pm_api_id> > /sys/kernel/debug/zynqmp_pm/power or
+ * echo <pm_api_name> > /sys/kernel/debug/zynqmp_pm/power
+ */
+static ssize_t zynqmp_pm_debugfs_api_write(struct file *file,
+ const char __user *ptr, size_t len,
+ loff_t *off)
+{
+ char *kern_buff, *tmp_buff;
+ char *pm_api_req;
+ u32 pm_id = 0;
+ u64 pm_api_arg[4] = {0, 0, 0, 0};
+ /* Return values from PM APIs calls */
+ u32 pm_api_ret[4] = {0, 0, 0, 0};
+
+ int ret;
+ int i = 0;
+
+ if (*off != 0 || len == 0)
+ return -EINVAL;
+
+ kern_buff = memdup_user(ptr, len);
+ if (IS_ERR(kern_buff))
+ return PTR_ERR(kern_buff);
+
+ tmp_buff = kern_buff;
+
+ /* Read the API name from a user request */
+ pm_api_req = strsep(&kern_buff, " ");
+
+ ret = get_pm_api_id(pm_api_req, &pm_id);
+ if (ret < 0)
+ goto err;
+
+ /* Read node_id and arguments from the PM-API request */
+ pm_api_req = strsep(&kern_buff, " ");
+ while ((i < ARRAY_SIZE(pm_api_arg)) && pm_api_req) {
+ pm_api_arg[i++] = zynqmp_pm_argument_value(pm_api_req);
+ pm_api_req = strsep(&kern_buff, " ");
+ }
+
+ ret = process_api_request(pm_id, pm_api_arg, pm_api_ret);
+
+err:
+ kfree(tmp_buff);
+ if (ret)
+ return ret;
+ else
+ return len;
+}
+
+/**
+ * zynqmp_pm_debugfs_api_version_read - debugfs read function
+ * @file: User file structure
+ * @ptr: Requested pm_api_version string
+ * @len: Length of the userspace buffer
+ * @off: Offset within the file
+ *
+ * Return: Length of the version string on success
+ * -EFAULT otherwise
+ *
+ * Used to display the pm api version.
+ * cat /sys/kernel/debug/zynqmp_pm/pm_api_version
+ */
+static ssize_t zynqmp_pm_debugfs_api_version_read(struct file *file,
+ char __user *ptr, size_t len,
+ loff_t *off)
+{
+ int ret;
+ u32 pm_api_version;
+ const struct zynqmp_eemi_ops *eemi_ops = get_eemi_ops();
+ char resp[MAX_API_VERSION_RESP_LEN];
+ u32 resp_len;
+
+ if (!eemi_ops || !eemi_ops->get_api_version)
+ return -ENXIO;
+
+ if (*off != 0)
+ return 0;
+
+ eemi_ops->get_api_version(&pm_api_version);
+ resp_len = snprintf(resp, MAX_API_VERSION_RESP_LEN,
+ "PM-API Version = %d.%d\n",
+ pm_api_version >> 16,
+ pm_api_version & 0xffff);
+
+ if (len < resp_len)
+ return -EINVAL;
+
+ ret = copy_to_user(ptr, resp, resp_len);
+ if (ret)
+ return -EFAULT;
+
+ *off = resp_len + 1;
+
+ return resp_len;
+}
+
+/* Setup debugfs fops */
+static const struct file_operations fops_zynqmp_pm_dbgfs = {
+ .owner = THIS_MODULE,
+ .write = zynqmp_pm_debugfs_api_write,
+ .read = zynqmp_pm_debugfs_api_version_read,
+};
+
+/**
+ * zynqmp_pm_api_debugfs_init - Initialize debugfs interface
+ *
+ * Return: Returns 0 on success
+ * Corresponding error code otherwise
+ */
+int zynqmp_pm_api_debugfs_init(void)
+{
+ int err;
+
+ /* Initialize debugfs interface */
+ zynqmp_pm_debugfs_dir = debugfs_create_dir(DRIVER_NAME, NULL);
+ if (!zynqmp_pm_debugfs_dir) {
+ pr_err("debugfs_create_dir failed\n");
+ return -ENODEV;
+ }
+
+ zynqmp_pm_debugfs_power =
+ debugfs_create_file("pm", 0220,
+ zynqmp_pm_debugfs_dir, NULL,
+ &fops_zynqmp_pm_dbgfs);
+ if (!zynqmp_pm_debugfs_power) {
+ pr_err("debugfs_create_file power failed\n");
+ err = -ENODEV;
+ goto err_dbgfs;
+ }
+
+ zynqmp_pm_debugfs_api_version =
+ debugfs_create_file("api_version", 0444,
+ zynqmp_pm_debugfs_dir, NULL,
+ &fops_zynqmp_pm_dbgfs);
+ if (!zynqmp_pm_debugfs_api_version) {
+ pr_err("debugfs_create_file api_version failed\n");
+ err = -ENODEV;
+ goto err_dbgfs;
+ }
+
+ return 0;
+
+err_dbgfs:
+ debugfs_remove_recursive(zynqmp_pm_debugfs_dir);
+ zynqmp_pm_debugfs_dir = NULL;
+
+ return err;
+}
diff --git a/drivers/firmware/xilinx/zynqmp/firmware.c b/drivers/firmware/xilinx/zynqmp/firmware.c
index c42cf9f..5e20e3b 100644
--- a/drivers/firmware/xilinx/zynqmp/firmware.c
+++ b/drivers/firmware/xilinx/zynqmp/firmware.c
@@ -20,6 +20,7 @@
#include <linux/uaccess.h>
#include <linux/firmware/xilinx/zynqmp/firmware.h>
+#include <linux/firmware/xilinx/zynqmp/firmware-debug.h>
#define DRIVER_NAME "zynqmp_firmware"
@@ -996,9 +997,17 @@ MODULE_DEVICE_TABLE(of, firmware_of_match);
static int zynqmp_firmware_probe(struct platform_device *pdev)
{
+ int ret;
+
+ ret = zynqmp_pm_api_debugfs_init();
+ if (ret) {
+ pr_err("%s() debugfs init fail with error %d\n", __func__, ret);
+ return ret;
+ }
+
zynqmp_pm_ggs_init(&pdev->dev);
- return 0;
+ return ret;
}
static struct platform_driver zynqmp_firmware_platform_driver = {
diff --git a/include/linux/firmware/xilinx/zynqmp/firmware-debug.h b/include/linux/firmware/xilinx/zynqmp/firmware-debug.h
new file mode 100644
index 0000000..73faa45
--- /dev/null
+++ b/include/linux/firmware/xilinx/zynqmp/firmware-debug.h
@@ -0,0 +1,31 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Xilinx Zynq MPSoC Firmware layer
+ *
+ * Copyright (C) 2014-2018 Xilinx
+ *
+ * Michal Simek <michal.simek at xilinx.com>
+ * Davorin Mista <davorin.mista at aggios.com>
+ * Jolly Shah <jollys at xilinx.com>
+ * Rajan Vaja <rajanv at xilinx.com>
+ */
+
+#ifndef __SOC_ZYNQMP_FIRMWARE_DEBUG_H__
+#define __SOC_ZYNQMP_FIRMWARE_DEBUG_H__
+
+#include <linux/firmware/xilinx/zynqmp/firmware.h>
+
+int zynqmp_pm_self_suspend(const u32 node,
+ const u32 latency,
+ const u32 state);
+int zynqmp_pm_abort_suspend(const enum zynqmp_pm_abort_reason reason);
+int zynqmp_pm_register_notifier(const u32 node, const u32 event,
+ const u32 wake, const u32 enable);
+
+#if IS_REACHABLE(CONFIG_DEBUG_FS)
+int zynqmp_pm_api_debugfs_init(void);
+#else
+static inline int zynqmp_pm_api_debugfs_init(void) { return 0; }
+#endif
+
+#endif /* __SOC_ZYNQMP_FIRMWARE_DEBUG_H__ */
--
2.7.4
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