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/*
* This file is part of the coreboot project.
*
* Copyright 2016 Google Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that 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.
*/
#ifndef __I2C_GENERIC_CHIP_H__
#define __I2C_GENERIC_CHIP_H__
#include <arch/acpi_device.h>
#include <device/i2c.h>
enum power_mgmt_type {
POWER_RESOURCE = 1,
GPIO_EXPORT = 2,
};
struct drivers_i2c_generic_config {
const char *hid; /* ACPI _HID (required) */
const char *cid; /* ACPI _CID */
const char *name; /* ACPI Device Name */
const char *desc; /* Device Description */
unsigned uid; /* ACPI _UID */
enum i2c_speed speed; /* Bus speed in Hz, default is I2C_SPEED_FAST */
unsigned wake; /* Wake GPE */
struct acpi_irq irq; /* Interrupt */
/*
* This flag will add a device propery which will indicate
* to the OS that it should probe this device before adding it.
*
* This can be used to declare a device that may not exist on
* the board, for example to support multiple trackpad vendors.
*/
int probed;
/* GPIO used to indicate if this device is present */
unsigned device_present_gpio;
unsigned device_present_gpio_invert;
/* Power management type. */
enum power_mgmt_type pwr_mgmt_type;
/* GPIO used to take device out of reset or to put it into reset. */
struct acpi_gpio reset_gpio;
/* Delay to be inserted after device is taken out of reset. */
unsigned reset_delay_ms;
/* GPIO used to enable device. */
struct acpi_gpio enable_gpio;
/* Delay to be inserted after device is enabled. */
unsigned enable_delay_ms;
};
/*
* Fills in generic information about i2c device from device-tree
* properties. Callback can be provided to fill in any
* device-specific information in SSDT.
*
* Parameters:
* dev: Device requesting i2c generic information to be filled
* callback: Callback to fill in device-specific information
* config: Pointer to drivers_i2c_generic_config structure
*/
void i2c_generic_fill_ssdt(struct device *dev,
void (*callback)(struct device *dev),
struct drivers_i2c_generic_config *config);
#endif /* __I2C_GENERIC_CHIP_H__ */
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