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Diffstat (limited to 'drivers/i2c/busses/i2c-pasemi-pci.c')
-rw-r--r--drivers/i2c/busses/i2c-pasemi-pci.c86
1 files changed, 86 insertions, 0 deletions
diff --git a/drivers/i2c/busses/i2c-pasemi-pci.c b/drivers/i2c/busses/i2c-pasemi-pci.c
new file mode 100644
index 000000000..cfc89e04e
--- /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");