diff --git a/arch/x86/include/asm/amd_hsmp.h b/arch/x86/include/asm/amd_hsmp.h
index 03c2ce3edaf5..ada14e55f9f4 100644
--- a/arch/x86/include/asm/amd_hsmp.h
+++ b/arch/x86/include/asm/amd_hsmp.h
@@ -5,7 +5,7 @@
 
 #include <uapi/asm/amd_hsmp.h>
 
-#if IS_ENABLED(CONFIG_AMD_HSMP)
+#if IS_ENABLED(CONFIG_AMD_HSMP) || IS_ENABLED(CONFIG_AMD_HSMP_ACPI)
 int hsmp_send_message(struct hsmp_message *msg);
 #else
 static inline int hsmp_send_message(struct hsmp_message *msg)
diff --git a/drivers/platform/x86/amd/hsmp/Kconfig b/drivers/platform/x86/amd/hsmp/Kconfig
index b55d4ed9bceb..15888a89581a 100644
--- a/drivers/platform/x86/amd/hsmp/Kconfig
+++ b/drivers/platform/x86/amd/hsmp/Kconfig
@@ -3,9 +3,30 @@
 # AMD HSMP Driver
 #
 
+menu "AMD Host System Management Port driver"
+	depends on AMD_NB
+
+config AMD_HSMP_ACPI
+	tristate "AMD HSMP ACPI driver"
+	depends on ACPI
+	help
+	  The driver provides a way for user space tools to monitor and manage
+	  system management functionality on EPYC server CPUs from AMD.
+
+	  Host System Management Port (HSMP) interface is a mailbox interface
+	  between the x86 core and the System Management Unit (SMU) firmware.
+
+	  This driver supports ACPI based probing.
+
+	  You  may enable this, if your platform bios provides an ACPI object
+	  as described in the documentation.
+
+	  If you choose to compile this driver as a module the module will be
+	  called amd_hsmp.
+
 config AMD_HSMP
 	tristate "AMD HSMP Driver"
-	depends on AMD_NB && X86_64 && ACPI
+	depends on AMD_HSMP_ACPI=n
 	help
 	  The driver provides a way for user space tools to monitor and manage
 	  system management functionality on EPYC server CPUs from AMD.
@@ -15,3 +36,5 @@ config AMD_HSMP
 
 	  If you choose to compile this driver as a module the module will be
 	  called amd_hsmp.
+
+endmenu
diff --git a/drivers/platform/x86/amd/hsmp/Makefile b/drivers/platform/x86/amd/hsmp/Makefile
index 0cc92865c0a2..53ebc462b0f9 100644
--- a/drivers/platform/x86/amd/hsmp/Makefile
+++ b/drivers/platform/x86/amd/hsmp/Makefile
@@ -4,5 +4,11 @@
 # AMD HSMP Driver
 #
 
-obj-$(CONFIG_AMD_HSMP)		+= amd_hsmp.o
-amd_hsmp-objs			:= hsmp.o plat.o acpi.o
+ifneq ($(CONFIG_AMD_HSMP), )
+obj-$(CONFIG_AMD_HSMP)          += amd_hsmp.o
+amd_hsmp-objs = hsmp.o plat.o
+endif
+ifneq ($(CONFIG_AMD_HSMP_ACPI), )
+obj-$(CONFIG_AMD_HSMP_ACPI)     += amd_hsmp.o
+amd_hsmp-objs = hsmp.o acpi.o
+endif
diff --git a/drivers/platform/x86/amd/hsmp/acpi.c b/drivers/platform/x86/amd/hsmp/acpi.c
index 46cb86d5d550..86100943aadc 100644
--- a/drivers/platform/x86/amd/hsmp/acpi.c
+++ b/drivers/platform/x86/amd/hsmp/acpi.c
@@ -11,29 +11,43 @@
 
 #include "hsmp.h"
 
+#include <asm/amd_nb.h>
+
 #include <linux/acpi.h>
 #include <linux/device.h>
 #include <linux/dev_printk.h>
 #include <linux/ioport.h>
 #include <linux/kstrtox.h>
+#include <linux/platform_device.h>
 #include <linux/uuid.h>
 
 #include <uapi/asm-generic/errno-base.h>
 
+#define DRIVER_NAME		"amd_hsmp"
+#define DRIVER_VERSION		"2.3"
+#define ACPI_HSMP_DEVICE_HID	"AMDI0097"
+
 /* These are the strings specified in ACPI table */
 #define MSG_IDOFF_STR		"MsgIdOffset"
 #define MSG_ARGOFF_STR		"MsgArgOffset"
 #define MSG_RESPOFF_STR		"MsgRspOffset"
 
-void amd_hsmp_acpi_rdwr(struct hsmp_socket *sock, u32 offset,
-			u32 *value, bool write)
+static int amd_hsmp_acpi_rdwr(struct hsmp_socket *sock, u32 offset,
+			      u32 *value, bool write)
 {
 	if (write)
 		iowrite32(*value, sock->virt_base_addr + offset);
 	else
 		*value = ioread32(sock->virt_base_addr + offset);
+	return 0;
 }
 
+static const struct file_operations hsmp_fops = {
+	.owner		= THIS_MODULE,
+	.unlocked_ioctl	= hsmp_ioctl,
+	.compat_ioctl	= hsmp_ioctl,
+};
+
 /* This is the UUID used for HSMP */
 static const guid_t acpi_hsmp_uuid = GUID_INIT(0xb74d619d, 0x5707, 0x48bd,
 						0xa6, 0x9f, 0x4e, 0xa2,
@@ -194,9 +208,9 @@ static int hsmp_parse_acpi_table(struct device *dev, u16 sock_ind)
 	struct hsmp_socket *sock = &hsmp_pdev.sock[sock_ind];
 	int ret;
 
-	sock->sock_ind			= sock_ind;
-	sock->dev			= dev;
-	hsmp_pdev.is_acpi_device	= true;
+	sock->sock_ind		= sock_ind;
+	sock->dev		= dev;
+	sock->amd_hsmp_rdwr	= amd_hsmp_acpi_rdwr;
 
 	sema_init(&sock->hsmp_sem, 1);
 
@@ -209,7 +223,7 @@ static int hsmp_parse_acpi_table(struct device *dev, u16 sock_ind)
 	return hsmp_read_acpi_dsd(sock);
 }
 
-int hsmp_create_acpi_sysfs_if(struct device *dev)
+static int hsmp_create_acpi_sysfs_if(struct device *dev)
 {
 	struct attribute_group *attr_grp;
 	u16 sock_ind;
@@ -232,7 +246,7 @@ int hsmp_create_acpi_sysfs_if(struct device *dev)
 	return devm_device_add_group(dev, attr_grp);
 }
 
-int init_acpi(struct device *dev)
+static int init_acpi(struct device *dev)
 {
 	u16 sock_ind;
 	int ret;
@@ -266,3 +280,94 @@ int init_acpi(struct device *dev)
 
 	return ret;
 }
+
+static const struct acpi_device_id amd_hsmp_acpi_ids[] = {
+	{ACPI_HSMP_DEVICE_HID, 0},
+	{}
+};
+MODULE_DEVICE_TABLE(acpi, amd_hsmp_acpi_ids);
+
+static bool check_acpi_support(struct device *dev)
+{
+	struct acpi_device *adev = ACPI_COMPANION(dev);
+
+	if (adev && !acpi_match_device_ids(adev, amd_hsmp_acpi_ids))
+		return true;
+
+	return false;
+}
+
+static int hsmp_acpi_probe(struct platform_device *pdev)
+{
+	int ret;
+
+	if (!hsmp_pdev.is_probed) {
+		hsmp_pdev.num_sockets = amd_nb_num();
+		if (hsmp_pdev.num_sockets == 0 || hsmp_pdev.num_sockets > MAX_AMD_SOCKETS)
+			return -ENODEV;
+
+		hsmp_pdev.sock = devm_kcalloc(&pdev->dev, hsmp_pdev.num_sockets,
+					      sizeof(*hsmp_pdev.sock),
+					      GFP_KERNEL);
+		if (!hsmp_pdev.sock)
+			return -ENOMEM;
+	}
+
+	if (!check_acpi_support(&pdev->dev)) {
+		dev_err(&pdev->dev, "Not ACPI device?\n");
+		return -ENODEV;
+	}
+
+	ret = init_acpi(&pdev->dev);
+	if (ret) {
+		dev_err(&pdev->dev, "Failed to initialize HSMP interface.\n");
+		return ret;
+	}
+
+	ret = hsmp_create_acpi_sysfs_if(&pdev->dev);
+	if (ret)
+		dev_err(&pdev->dev, "Failed to create HSMP sysfs interface\n");
+
+	if (!hsmp_pdev.is_probed) {
+		hsmp_pdev.mdev.name	= HSMP_CDEV_NAME;
+		hsmp_pdev.mdev.minor	= MISC_DYNAMIC_MINOR;
+		hsmp_pdev.mdev.fops	= &hsmp_fops;
+		hsmp_pdev.mdev.parent	= &pdev->dev;
+		hsmp_pdev.mdev.nodename	= HSMP_DEVNODE_NAME;
+		hsmp_pdev.mdev.mode	= 0644;
+
+		ret = misc_register(&hsmp_pdev.mdev);
+		if (ret)
+			return ret;
+		hsmp_pdev.is_probed = true;
+	}
+
+	return 0;
+}
+
+static void hsmp_acpi_remove(struct platform_device *pdev)
+{
+	/*
+	 * We register only one misc_device even on multi-socket system.
+	 * So, deregister should happen only once.
+	 */
+	if (hsmp_pdev.is_probed) {
+		misc_deregister(&hsmp_pdev.mdev);
+		hsmp_pdev.is_probed = false;
+	}
+}
+
+static struct platform_driver amd_hsmp_driver = {
+	.probe		= hsmp_acpi_probe,
+	.remove_new	= hsmp_acpi_remove,
+	.driver		= {
+		.name	= DRIVER_NAME,
+		.acpi_match_table = amd_hsmp_acpi_ids,
+	},
+};
+
+module_platform_driver(amd_hsmp_driver);
+
+MODULE_DESCRIPTION("AMD HSMP Platform Interface Driver");
+MODULE_VERSION(DRIVER_VERSION);
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/platform/x86/amd/hsmp/hsmp.c b/drivers/platform/x86/amd/hsmp/hsmp.c
index 14edaace4379..759ec1d4d60d 100644
--- a/drivers/platform/x86/amd/hsmp/hsmp.c
+++ b/drivers/platform/x86/amd/hsmp/hsmp.c
@@ -31,17 +31,6 @@
 
 struct hsmp_plat_device hsmp_pdev;
 
-static int amd_hsmp_rdwr(struct hsmp_socket *sock, u32 offset,
-			 u32 *value, bool write)
-{
-	if (hsmp_pdev.is_acpi_device)
-		amd_hsmp_acpi_rdwr(sock, offset, value, write);
-	else
-		return amd_hsmp_pci_rdwr(sock, offset, value, write);
-
-	return 0;
-}
-
 /*
  * Send a message to the HSMP port via PCI-e config space registers
  * or by writing to MMIO space.
@@ -64,7 +53,7 @@ static int __hsmp_send_message(struct hsmp_socket *sock, struct hsmp_message *ms
 
 	/* Clear the status register */
 	mbox_status = HSMP_STATUS_NOT_READY;
-	ret = amd_hsmp_rdwr(sock, mbinfo->msg_resp_off, &mbox_status, HSMP_WR);
+	ret = sock->amd_hsmp_rdwr(sock, mbinfo->msg_resp_off, &mbox_status, HSMP_WR);
 	if (ret) {
 		pr_err("Error %d clearing mailbox status register\n", ret);
 		return ret;
@@ -73,8 +62,8 @@ static int __hsmp_send_message(struct hsmp_socket *sock, struct hsmp_message *ms
 	index = 0;
 	/* Write any message arguments */
 	while (index < msg->num_args) {
-		ret = amd_hsmp_rdwr(sock, mbinfo->msg_arg_off + (index << 2),
-				    &msg->args[index], HSMP_WR);
+		ret = sock->amd_hsmp_rdwr(sock, mbinfo->msg_arg_off + (index << 2),
+					  &msg->args[index], HSMP_WR);
 		if (ret) {
 			pr_err("Error %d writing message argument %d\n", ret, index);
 			return ret;
@@ -83,7 +72,7 @@ static int __hsmp_send_message(struct hsmp_socket *sock, struct hsmp_message *ms
 	}
 
 	/* Write the message ID which starts the operation */
-	ret = amd_hsmp_rdwr(sock, mbinfo->msg_id_off, &msg->msg_id, HSMP_WR);
+	ret = sock->amd_hsmp_rdwr(sock, mbinfo->msg_id_off, &msg->msg_id, HSMP_WR);
 	if (ret) {
 		pr_err("Error %d writing message ID %u\n", ret, msg->msg_id);
 		return ret;
@@ -100,7 +89,7 @@ static int __hsmp_send_message(struct hsmp_socket *sock, struct hsmp_message *ms
 	timeout	= jiffies + msecs_to_jiffies(HSMP_MSG_TIMEOUT);
 
 	while (time_before(jiffies, timeout)) {
-		ret = amd_hsmp_rdwr(sock, mbinfo->msg_resp_off, &mbox_status, HSMP_RD);
+		ret = sock->amd_hsmp_rdwr(sock, mbinfo->msg_resp_off, &mbox_status, HSMP_RD);
 		if (ret) {
 			pr_err("Error %d reading mailbox status\n", ret);
 			return ret;
@@ -135,8 +124,8 @@ static int __hsmp_send_message(struct hsmp_socket *sock, struct hsmp_message *ms
 	 */
 	index = 0;
 	while (index < msg->response_sz) {
-		ret = amd_hsmp_rdwr(sock, mbinfo->msg_arg_off + (index << 2),
-				    &msg->args[index], HSMP_RD);
+		ret = sock->amd_hsmp_rdwr(sock, mbinfo->msg_arg_off + (index << 2),
+					  &msg->args[index], HSMP_RD);
 		if (ret) {
 			pr_err("Error %d reading response %u for message ID:%u\n",
 			       ret, index, msg->msg_id);
diff --git a/drivers/platform/x86/amd/hsmp/hsmp.h b/drivers/platform/x86/amd/hsmp/hsmp.h
index a77887d298b6..5d4fc7735a87 100644
--- a/drivers/platform/x86/amd/hsmp/hsmp.h
+++ b/drivers/platform/x86/amd/hsmp/hsmp.h
@@ -41,6 +41,7 @@ struct hsmp_socket {
 	struct pci_dev *root;
 	struct device *dev;
 	u16 sock_ind;
+	int (*amd_hsmp_rdwr)(struct hsmp_socket *sock, u32 off, u32 *val, bool rw);
 };
 
 struct hsmp_plat_device {
@@ -48,19 +49,14 @@ struct hsmp_plat_device {
 	struct hsmp_socket *sock;
 	u32 proto_ver;
 	u16 num_sockets;
-	bool is_acpi_device;
 	bool is_probed;
 };
 
 extern struct hsmp_plat_device hsmp_pdev;
 
-int init_acpi(struct device *dev);
 ssize_t hsmp_metric_tbl_read(struct file *filp, struct kobject *kobj,
 			     struct bin_attribute *bin_attr, char *buf,
 			     loff_t off, size_t count);
-int hsmp_create_acpi_sysfs_if(struct device *dev);
-int amd_hsmp_pci_rdwr(struct hsmp_socket *sock, u32 offset,
-		      u32 *value, bool write);
 int hsmp_cache_proto_ver(u16 sock_ind);
 long hsmp_ioctl(struct file *fp, unsigned int cmd, unsigned long arg);
 umode_t hsmp_is_sock_attr_visible(struct kobject *kobj,
@@ -68,6 +64,4 @@ umode_t hsmp_is_sock_attr_visible(struct kobject *kobj,
 int hsmp_create_attr_list(struct attribute_group *attr_grp,
 			  struct device *dev, u16 sock_ind);
 int hsmp_test(u16 sock_ind, u32 value);
-void amd_hsmp_acpi_rdwr(struct hsmp_socket *sock, u32 offset,
-			u32 *value, bool write);
 #endif /* HSMP_H */
diff --git a/drivers/platform/x86/amd/hsmp/plat.c b/drivers/platform/x86/amd/hsmp/plat.c
index c297540bb64c..3bce2c570f2b 100644
--- a/drivers/platform/x86/amd/hsmp/plat.c
+++ b/drivers/platform/x86/amd/hsmp/plat.c
@@ -13,15 +13,13 @@
 
 #include <asm/amd_nb.h>
 
-#include <linux/acpi.h>
 #include <linux/device.h>
 #include <linux/module.h>
 #include <linux/pci.h>
 #include <linux/platform_device.h>
 
 #define DRIVER_NAME		"amd_hsmp"
-#define DRIVER_VERSION		"2.2"
-#define ACPI_HSMP_DEVICE_HID	"AMDI0097"
+#define DRIVER_VERSION		"2.3"
 
 /*
  * To access specific HSMP mailbox register, s/w writes the SMN address of HSMP mailbox
@@ -37,8 +35,8 @@
 #define HSMP_INDEX_REG		0xc4
 #define HSMP_DATA_REG		0xc8
 
-int amd_hsmp_pci_rdwr(struct hsmp_socket *sock, u32 offset,
-		      u32 *value, bool write)
+static int amd_hsmp_pci_rdwr(struct hsmp_socket *sock, u32 offset,
+			     u32 *value, bool write)
 {
 	int ret;
 
@@ -113,6 +111,7 @@ static int init_platform_device(struct device *dev)
 		sock->sock_ind			= i;
 		sock->dev			= dev;
 		sock->mbinfo.base_addr		= SMN_HSMP_BASE;
+		sock->amd_hsmp_rdwr		= amd_hsmp_pci_rdwr;
 
 		/*
 		 * This is a transitional change from non-ACPI to ACPI, only
@@ -146,89 +145,39 @@ static int init_platform_device(struct device *dev)
 	return 0;
 }
 
-static const struct acpi_device_id amd_hsmp_acpi_ids[] = {
-	{ACPI_HSMP_DEVICE_HID, 0},
-	{}
-};
-MODULE_DEVICE_TABLE(acpi, amd_hsmp_acpi_ids);
-
-static bool check_acpi_support(struct device *dev)
-{
-	struct acpi_device *adev = ACPI_COMPANION(dev);
-
-	if (adev && !acpi_match_device_ids(adev, amd_hsmp_acpi_ids))
-		return true;
-
-	return false;
-}
-
 static int hsmp_pltdrv_probe(struct platform_device *pdev)
 {
 	int ret;
 
-	/*
-	 * On ACPI supported BIOS, there is an ACPI HSMP device added for
-	 * each socket, so the per socket probing, but the memory allocated for
-	 * sockets should be contiguous to access it as an array,
-	 * Hence allocate memory for all the sockets at once instead of allocating
-	 * on each probe.
-	 */
-	if (!hsmp_pdev.is_probed) {
-		hsmp_pdev.sock = devm_kcalloc(&pdev->dev, hsmp_pdev.num_sockets,
-					      sizeof(*hsmp_pdev.sock),
-					      GFP_KERNEL);
-		if (!hsmp_pdev.sock)
-			return -ENOMEM;
-	}
+	hsmp_pdev.sock = devm_kcalloc(&pdev->dev, hsmp_pdev.num_sockets,
+				      sizeof(*hsmp_pdev.sock),
+				      GFP_KERNEL);
+	if (!hsmp_pdev.sock)
+		return -ENOMEM;
 
-	if (check_acpi_support(&pdev->dev)) {
-		ret = init_acpi(&pdev->dev);
-		if (ret) {
-			dev_err(&pdev->dev, "Failed to init HSMP mailbox\n");
-			return ret;
-		}
-		ret = hsmp_create_acpi_sysfs_if(&pdev->dev);
-		if (ret)
-			dev_err(&pdev->dev, "Failed to create HSMP sysfs interface\n");
-	} else {
-		ret = init_platform_device(&pdev->dev);
-		if (ret) {
-			dev_err(&pdev->dev, "Failed to init HSMP mailbox\n");
-			return ret;
-		}
-		ret = hsmp_create_non_acpi_sysfs_if(&pdev->dev);
-		if (ret)
-			dev_err(&pdev->dev, "Failed to create HSMP sysfs interface\n");
+	ret = init_platform_device(&pdev->dev);
+	if (ret) {
+		dev_err(&pdev->dev, "Failed to init HSMP mailbox\n");
+		return ret;
 	}
 
-	if (!hsmp_pdev.is_probed) {
-		hsmp_pdev.mdev.name	= HSMP_CDEV_NAME;
-		hsmp_pdev.mdev.minor	= MISC_DYNAMIC_MINOR;
-		hsmp_pdev.mdev.fops	= &hsmp_fops;
-		hsmp_pdev.mdev.parent	= &pdev->dev;
-		hsmp_pdev.mdev.nodename	= HSMP_DEVNODE_NAME;
-		hsmp_pdev.mdev.mode	= 0644;
-
-		ret = misc_register(&hsmp_pdev.mdev);
-		if (ret)
-			return ret;
+	ret = hsmp_create_non_acpi_sysfs_if(&pdev->dev);
+	if (ret)
+		dev_err(&pdev->dev, "Failed to create HSMP sysfs interface\n");
 
-		hsmp_pdev.is_probed = true;
-	}
+	hsmp_pdev.mdev.name	= HSMP_CDEV_NAME;
+	hsmp_pdev.mdev.minor	= MISC_DYNAMIC_MINOR;
+	hsmp_pdev.mdev.fops	= &hsmp_fops;
+	hsmp_pdev.mdev.parent	= &pdev->dev;
+	hsmp_pdev.mdev.nodename	= HSMP_DEVNODE_NAME;
+	hsmp_pdev.mdev.mode	= 0644;
 
-	return 0;
+	return misc_register(&hsmp_pdev.mdev);
 }
 
 static void hsmp_pltdrv_remove(struct platform_device *pdev)
 {
-	/*
-	 * We register only one misc_device even on multi socket system.
-	 * So, deregister should happen only once.
-	 */
-	if (hsmp_pdev.is_probed) {
-		misc_deregister(&hsmp_pdev.mdev);
-		hsmp_pdev.is_probed = false;
-	}
+	misc_deregister(&hsmp_pdev.mdev);
 }
 
 static struct platform_driver amd_hsmp_driver = {
@@ -236,7 +185,6 @@ static struct platform_driver amd_hsmp_driver = {
 	.remove_new	= hsmp_pltdrv_remove,
 	.driver		= {
 		.name	= DRIVER_NAME,
-		.acpi_match_table = amd_hsmp_acpi_ids,
 	},
 };
 
@@ -295,6 +243,12 @@ static int __init hsmp_plt_init(void)
 {
 	int ret = -ENODEV;
 
+	if (!legacy_hsmp_support()) {
+		pr_info("HSMP is not supported on Family:%x model:%x\n",
+			boot_cpu_data.x86, boot_cpu_data.x86_model);
+		return ret;
+	}
+
 	/*
 	 * amd_nb_num() returns number of SMN/DF interfaces present in the system
 	 * if we have N SMN/DF interfaces that ideally means N sockets
@@ -307,19 +261,9 @@ static int __init hsmp_plt_init(void)
 	if (ret)
 		return ret;
 
-	if (!hsmp_pdev.is_acpi_device) {
-		if (legacy_hsmp_support()) {
-			/* Not ACPI device, but supports HSMP, register a plat_dev */
-			ret = hsmp_plat_dev_register();
-		} else {
-			/* Not ACPI, Does not support HSMP */
-			pr_info("HSMP is not supported on Family:%x model:%x\n",
-				boot_cpu_data.x86, boot_cpu_data.x86_model);
-			ret = -ENODEV;
-		}
-		if (ret)
-			platform_driver_unregister(&amd_hsmp_driver);
-	}
+	ret = hsmp_plat_dev_register();
+	if (ret)
+		platform_driver_unregister(&amd_hsmp_driver);
 
 	return ret;
 }
