87 lines
1.9 KiB
C
87 lines
1.9 KiB
C
// 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");
|