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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Copyright (C) 2006-2007 PA Semi, Inc4 *5 * SMBus host driver for PA Semi PWRficient6 */7 8#include <linux/module.h>9#include <linux/pci.h>10#include <linux/kernel.h>11#include <linux/stddef.h>12#include <linux/sched.h>13#include <linux/i2c.h>14#include <linux/delay.h>15#include <linux/slab.h>16#include <linux/io.h>17 18#include "i2c-pasemi-core.h"19 20#define CLK_100K_DIV 8421#define CLK_400K_DIV 2122 23static struct pci_driver pasemi_smb_pci_driver;24 25static int pasemi_smb_pci_probe(struct pci_dev *dev,26 const struct pci_device_id *id)27{28 struct pasemi_smbus *smbus;29 unsigned long base;30 int size;31 int error;32 33 if (!(pci_resource_flags(dev, 0) & IORESOURCE_IO))34 return -ENODEV;35 36 smbus = devm_kzalloc(&dev->dev, sizeof(*smbus), GFP_KERNEL);37 if (!smbus)38 return -ENOMEM;39 40 smbus->dev = &dev->dev;41 base = pci_resource_start(dev, 0);42 size = pci_resource_len(dev, 0);43 smbus->clk_div = CLK_100K_DIV;44 45 /*46 * The original PASemi PCI controllers don't have a register for47 * their HW revision.48 */49 smbus->hw_rev = PASEMI_HW_REV_PCI;50 51 if (!devm_request_region(&dev->dev, base, size,52 pasemi_smb_pci_driver.name))53 return -EBUSY;54 55 smbus->ioaddr = pcim_iomap(dev, 0, 0);56 if (!smbus->ioaddr)57 return -EBUSY;58 59 smbus->adapter.class = I2C_CLASS_HWMON;60 error = pasemi_i2c_common_probe(smbus);61 if (error)62 return error;63 64 pci_set_drvdata(dev, smbus);65 66 return 0;67}68 69static const struct pci_device_id pasemi_smb_pci_ids[] = {70 { PCI_DEVICE(0x1959, 0xa003) },71 { 0, }72};73 74MODULE_DEVICE_TABLE(pci, pasemi_smb_pci_ids);75 76static struct pci_driver pasemi_smb_pci_driver = {77 .name = "i2c-pasemi",78 .id_table = pasemi_smb_pci_ids,79 .probe = pasemi_smb_pci_probe,80};81 82module_pci_driver(pasemi_smb_pci_driver);83 84MODULE_LICENSE("GPL");85MODULE_AUTHOR("Olof Johansson <olof@lixom.net>");86MODULE_DESCRIPTION("PA Semi PWRficient SMBus driver");87