drivers/i2c/hid: Add generic I2C HID driver
Add a generic I2C-HID driver for these types of devices that do not need extra functionality. This allows a new device to be added without having to write a new driver. The i2c-hid PNP0C50 is automatically added as the _CID for the device in the ACPI Device. BUG=chrome-os-partner:58666 TEST=used on eve to describe a new i2c-hid touch controller Change-Id: I94e9531a72f9bf1d6b3ade362b88883b21b83d0a Signed-off-by: Duncan Laurie <dlaurie@chromium.org> Reviewed-on: https://review.coreboot.org/17856 Reviewed-by: Aaron Durbin <adurbin@chromium.org> Tested-by: build bot (Jenkins)
This commit is contained in:
parent
bd10516643
commit
a12fc81fef
|
@ -0,0 +1,3 @@
|
|||
config DRIVERS_I2C_HID
|
||||
bool
|
||||
select DRIVERS_I2C_GENERIC
|
|
@ -0,0 +1 @@
|
|||
ramstage-$(CONFIG_DRIVERS_I2C_HID) += hid.c
|
|
@ -0,0 +1,28 @@
|
|||
/*
|
||||
* 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 __DRIVERS_I2C_HID_CHIP_H__
|
||||
#define __DRIVERS_I2C_HID_CHIP_H__
|
||||
|
||||
#include <drivers/i2c/generic/chip.h>
|
||||
|
||||
#define I2C_HID_CID "PNP0C50"
|
||||
|
||||
struct drivers_i2c_hid_config {
|
||||
struct drivers_i2c_generic_config generic;
|
||||
uint8_t hid_desc_reg_offset;
|
||||
};
|
||||
|
||||
#endif /* __I2C_HID_CHIP_H__ */
|
|
@ -0,0 +1,67 @@
|
|||
/*
|
||||
* 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.
|
||||
*/
|
||||
|
||||
#include <arch/acpigen_dsm.h>
|
||||
#include <device/device.h>
|
||||
#include <stdint.h>
|
||||
#include <string.h>
|
||||
#include "chip.h"
|
||||
|
||||
#if IS_ENABLED(CONFIG_HAVE_ACPI_TABLES)
|
||||
static void i2c_hid_fill_dsm(struct device *dev)
|
||||
{
|
||||
struct drivers_i2c_hid_config *config = dev->chip_info;
|
||||
struct dsm_i2c_hid_config dsm_config = {
|
||||
.hid_desc_reg_offset = config->hid_desc_reg_offset,
|
||||
};
|
||||
|
||||
acpigen_write_dsm_i2c_hid(&dsm_config);
|
||||
}
|
||||
|
||||
static void i2c_hid_fill_ssdt_generator(struct device *dev)
|
||||
{
|
||||
struct drivers_i2c_hid_config *config = dev->chip_info;
|
||||
config->generic.cid = I2C_HID_CID;
|
||||
i2c_generic_fill_ssdt(dev, &i2c_hid_fill_dsm, &config->generic);
|
||||
}
|
||||
|
||||
static const char *i2c_hid_acpi_name(struct device *dev)
|
||||
{
|
||||
static char name[5];
|
||||
snprintf(name, sizeof(name), "H%03.3X", dev->path.i2c.device);
|
||||
name[4] = '\0';
|
||||
return name;
|
||||
}
|
||||
#endif
|
||||
|
||||
static struct device_operations i2c_hid_ops = {
|
||||
.read_resources = DEVICE_NOOP,
|
||||
.set_resources = DEVICE_NOOP,
|
||||
.enable_resources = DEVICE_NOOP,
|
||||
#if IS_ENABLED(CONFIG_HAVE_ACPI_TABLES)
|
||||
.acpi_name = &i2c_hid_acpi_name,
|
||||
.acpi_fill_ssdt_generator = &i2c_hid_fill_ssdt_generator,
|
||||
#endif
|
||||
};
|
||||
|
||||
static void i2c_hid_enable(struct device *dev)
|
||||
{
|
||||
dev->ops = &i2c_hid_ops;
|
||||
}
|
||||
|
||||
struct chip_operations drivers_i2c_hid_ops = {
|
||||
CHIP_NAME("I2C HID Device")
|
||||
.enable_dev = &i2c_hid_enable
|
||||
};
|
Loading…
Reference in New Issue