1 files changed, 70 insertions, 0 deletions
diff --git a/drivers/i2c/busses/i2c-amd-asf-plat.c b/drivers/i2c/busses/i2c-amd-asf-plat.c
new file mode 100644
index 000000000000..72c203ec48c4
--- /dev/null
+++ b/drivers/i2c/busses/i2c-amd-asf-plat.c
@@ -0,0 +1,70 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * AMD Alert Standard Format Platform Driver
+ *
+ * Copyright (c) 2024, Advanced Micro Devices, Inc.
+ * All Rights Reserved.
+ *
+ * Authors: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
+ *	    Sanket Goswami <Sanket.Goswami@amd.com>
+ */
+
+#include <linux/device.h>
+#include <linux/errno.h>
+#include <linux/gfp_types.h>
+#include <linux/i2c.h>
+#include <linux/io.h>
+#include <linux/ioport.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/platform_device.h>
+#include <linux/sprintf.h>
+
+#include "i2c-piix4.h"
+
+struct amd_asf_dev {
+	struct i2c_adapter adap;
+	struct sb800_mmio_cfg mmio_cfg;
+	struct resource *port_addr;
+};
+
+static int amd_asf_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct amd_asf_dev *asf_dev;
+
+	asf_dev = devm_kzalloc(dev, sizeof(*asf_dev), GFP_KERNEL);
+	if (!asf_dev)
+		return dev_err_probe(dev, -ENOMEM, "Failed to allocate memory\n");
+
+	asf_dev->mmio_cfg.use_mmio = true;
+	asf_dev->port_addr = platform_get_resource(pdev, IORESOURCE_IO, 0);
+	if (!asf_dev->port_addr)
+		return dev_err_probe(dev, -EINVAL, "missing IO resources\n");
+
+	asf_dev->adap.owner = THIS_MODULE;
+	asf_dev->adap.dev.parent = dev;
+
+	i2c_set_adapdata(&asf_dev->adap, asf_dev);
+	snprintf(asf_dev->adap.name, sizeof(asf_dev->adap.name), "AMD ASF adapter");
+
+	return devm_i2c_add_adapter(dev, &asf_dev->adap);
+}
+
+static const struct acpi_device_id amd_asf_acpi_ids[] = {
+	{ "AMDI001A" },
+	{ }
+};
+MODULE_DEVICE_TABLE(acpi, amd_asf_acpi_ids);
+
+static struct platform_driver amd_asf_driver = {
+	.driver = {
+		.name = "i2c-amd-asf",
+		.acpi_match_table = amd_asf_acpi_ids,
+	},
+	.probe = amd_asf_probe,
+};
+module_platform_driver(amd_asf_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("AMD Alert Standard Format Driver");