linux-imx

// SPDX-License-Identifier: GPL-2.0-or-later

/*

 * A driver for the Integrated Circuits ICS932S401

 * Copyright (C) 2008 IBM

 *

 * Author: Darrick J. Wong <darrick.wong@oracle.com>

 */

​

#include <linux/module.h>

#include <linux/jiffies.h>

#include <linux/i2c.h>

#include <linux/err.h>

#include <linux/mutex.h>

#include <linux/delay.h>

#include <linux/log2.h>

#include <linux/slab.h>

​

/* Addresses to scan */

static const unsigned short normal_i2c[] = { 0x69, I2C_CLIENT_END };

​

/* ICS932S401 registers */

#define ICS932S401_REG_CFG2         0x01

#define     ICS932S401_CFG1_SPREAD      0x01

#define ICS932S401_REG_CFG7         0x06

#define     ICS932S401_FS_MASK      0x07

#define ICS932S401_REG_VENDOR_REV       0x07

#define     ICS932S401_VENDOR       1

#define     ICS932S401_VENDOR_MASK      0x0F

#define     ICS932S401_REV          4

#define     ICS932S401_REV_SHIFT        4

#define ICS932S401_REG_DEVICE           0x09

#define     ICS932S401_DEVICE       11

#define ICS932S401_REG_CTRL         0x0A

#define     ICS932S401_MN_ENABLED       0x80

#define     ICS932S401_CPU_ALT      0x04

#define     ICS932S401_SRC_ALT      0x08

#define ICS932S401_REG_CPU_M_CTRL       0x0B

#define     ICS932S401_M_MASK       0x3F

#define ICS932S401_REG_CPU_N_CTRL       0x0C

#define ICS932S401_REG_CPU_SPREAD1      0x0D

#define ICS932S401_REG_CPU_SPREAD2      0x0E

#define     ICS932S401_SPREAD_MASK      0x7FFF

#define ICS932S401_REG_SRC_M_CTRL       0x0F

#define ICS932S401_REG_SRC_N_CTRL       0x10

#define ICS932S401_REG_SRC_SPREAD1      0x11

#define ICS932S401_REG_SRC_SPREAD2      0x12

#define ICS932S401_REG_CPU_DIVISOR      0x13

#define     ICS932S401_CPU_DIVISOR_SHIFT    4

#define ICS932S401_REG_PCISRC_DIVISOR       0x14

#define     ICS932S401_SRC_DIVISOR_MASK 0x0F

#define     ICS932S401_PCI_DIVISOR_SHIFT    4

​

/* Base clock is 14.318MHz */

#define BASE_CLOCK              14318

​

#define NUM_REGS                21

#define NUM_MIRRORED_REGS           15

​

static int regs_to_copy[NUM_MIRRORED_REGS] = {

    ICS932S401_REG_CFG2,

    ICS932S401_REG_CFG7,

    ICS932S401_REG_VENDOR_REV,

    ICS932S401_REG_DEVICE,