From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Thu, 11 Apr 2024 10:27:49 +0200
Subject: Adding upstream version 6.6.15.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 drivers/i2c/busses/i2c-pasemi-pci.c | 86 +++++++++++++++++++++++++++++++++++++
 1 file changed, 86 insertions(+)
 create mode 100644 drivers/i2c/busses/i2c-pasemi-pci.c

(limited to 'drivers/i2c/busses/i2c-pasemi-pci.c')

diff --git a/drivers/i2c/busses/i2c-pasemi-pci.c b/drivers/i2c/busses/i2c-pasemi-pci.c
new file mode 100644
index 0000000000..cfc89e04eb
--- /dev/null
+++ b/drivers/i2c/busses/i2c-pasemi-pci.c
@@ -0,0 +1,86 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2006-2007 PA Semi, Inc
+ *
+ * SMBus host driver for PA Semi PWRficient
+ */
+
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/kernel.h>
+#include <linux/stddef.h>
+#include <linux/sched.h>
+#include <linux/i2c.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/io.h>
+
+#include "i2c-pasemi-core.h"
+
+#define CLK_100K_DIV	84
+#define CLK_400K_DIV	21
+
+static struct pci_driver pasemi_smb_pci_driver;
+
+static int pasemi_smb_pci_probe(struct pci_dev *dev,
+				      const struct pci_device_id *id)
+{
+	struct pasemi_smbus *smbus;
+	unsigned long base;
+	int size;
+	int error;
+
+	if (!(pci_resource_flags(dev, 0) & IORESOURCE_IO))
+		return -ENODEV;
+
+	smbus = devm_kzalloc(&dev->dev, sizeof(*smbus), GFP_KERNEL);
+	if (!smbus)
+		return -ENOMEM;
+
+	smbus->dev = &dev->dev;
+	base = pci_resource_start(dev, 0);
+	size = pci_resource_len(dev, 0);
+	smbus->clk_div = CLK_100K_DIV;
+
+	/*
+	 * The original PASemi PCI controllers don't have a register for
+	 * their HW revision.
+	 */
+	smbus->hw_rev = PASEMI_HW_REV_PCI;
+
+	if (!devm_request_region(&dev->dev, base, size,
+			    pasemi_smb_pci_driver.name))
+		return -EBUSY;
+
+	smbus->ioaddr = pcim_iomap(dev, 0, 0);
+	if (!smbus->ioaddr)
+		return -EBUSY;
+
+	smbus->adapter.class = I2C_CLASS_HWMON | I2C_CLASS_SPD;
+	error = pasemi_i2c_common_probe(smbus);
+	if (error)
+		return error;
+
+	pci_set_drvdata(dev, smbus);
+
+	return 0;
+}
+
+static const struct pci_device_id pasemi_smb_pci_ids[] = {
+	{ PCI_DEVICE(0x1959, 0xa003) },
+	{ 0, }
+};
+
+MODULE_DEVICE_TABLE(pci, pasemi_smb_pci_ids);
+
+static struct pci_driver pasemi_smb_pci_driver = {
+	.name		= "i2c-pasemi",
+	.id_table	= pasemi_smb_pci_ids,
+	.probe		= pasemi_smb_pci_probe,
+};
+
+module_pci_driver(pasemi_smb_pci_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Olof Johansson <olof@lixom.net>");
+MODULE_DESCRIPTION("PA Semi PWRficient SMBus driver");
-- 
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