linux-imx

/*

 * Intel Quark MFD PCI driver for I2C & GPIO

 *

 * Copyright(c) 2014 Intel Corporation.

 *

 * This program is free software; you can redistribute it and/or modify it

 * under the terms and conditions of the GNU General Public License,

 * version 2, as published by the Free Software Foundation.

 *

 * This program is distributed in the hope it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for

 * more details.

 *

 * Intel Quark PCI device for I2C and GPIO controller sharing the same

 * PCI function. This PCI driver will split the 2 devices into their

 * respective drivers.

 */

​

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/pci.h>

#include <linux/mfd/core.h>

#include <linux/clkdev.h>

#include <linux/clk-provider.h>

#include <linux/dmi.h>

#include <linux/platform_data/gpio-dwapb.h>

#include <linux/platform_data/i2c-designware.h>

​

/* PCI BAR for register base address */

#define MFD_I2C_BAR     0

#define MFD_GPIO_BAR        1

​

/* ACPI _ADR value to match the child node */

#define MFD_ACPI_MATCH_GPIO 0ULL

#define MFD_ACPI_MATCH_I2C  1ULL

​

/* The base GPIO number under GPIOLIB framework */

#define INTEL_QUARK_MFD_GPIO_BASE   8

​

/* The default number of South-Cluster GPIO on Quark. */

#define INTEL_QUARK_MFD_NGPIO       8

​

/* The DesignWare GPIO ports on Quark. */

#define INTEL_QUARK_GPIO_NPORTS 1

​

#define INTEL_QUARK_IORES_MEM   0

#define INTEL_QUARK_IORES_IRQ   1

​

#define INTEL_QUARK_I2C_CONTROLLER_CLK "i2c_designware.0"

​

/* The Quark I2C controller source clock */

#define INTEL_QUARK_I2C_CLK_HZ  33000000

​

struct intel_quark_mfd {

    struct device       *dev;

    struct clk      *i2c_clk;

    struct clk_lookup   *i2c_clk_lookup;

};

​

static const struct dmi_system_id dmi_platform_info[] = {

    {

        .matches = {