platform/x86: Add Intel Cherry Trail ACPI INT33FE device driver

The INT33FE ACPI device has a CRS table with I2cSerialBusV2 resources for
3 devices: Maxim MAX17047 Fuel Gauge Controller, FUSB302 USB Type-C
Controller and PI3USB30532 USB switch.

This commit adds a driver for this ACPI device which instantiates
i2c-clients for these, so that the standard i2c drivers for these chips
can bind to the them.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>
This commit is contained in:
Hans de Goede 2017-04-06 09:24:36 +02:00 committed by Darren Hart (VMware)
parent 86074b85c4
commit 1cd706df8a
3 changed files with 157 additions and 0 deletions

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@ -781,6 +781,19 @@ config ACPI_CMPC
keys as input device, backlight device, tablet and accelerometer
devices.
config INTEL_CHT_INT33FE
tristate "Intel Cherry Trail ACPI INT33FE Driver"
depends on X86 && ACPI
---help---
This driver add support for the INT33FE ACPI device found on
some Intel Cherry Trail devices.
The INT33FE ACPI device has a CRS table with I2cSerialBusV2
resources for 3 devices: Maxim MAX17047 Fuel Gauge Controller,
FUSB302 USB Type-C Controller and PI3USB30532 USB switch.
This driver instantiates i2c-clients for these, so that standard
i2c drivers for these chips can bind to the them.
config INTEL_HID_EVENT
tristate "INTEL HID Event"
depends on ACPI

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@ -45,6 +45,7 @@ obj-$(CONFIG_ACPI_TOSHIBA) += toshiba_acpi.o
obj-$(CONFIG_TOSHIBA_BT_RFKILL) += toshiba_bluetooth.o
obj-$(CONFIG_TOSHIBA_HAPS) += toshiba_haps.o
obj-$(CONFIG_TOSHIBA_WMI) += toshiba-wmi.o
obj-$(CONFIG_INTEL_CHT_INT33FE) += intel_cht_int33fe.o
obj-$(CONFIG_INTEL_HID_EVENT) += intel-hid.o
obj-$(CONFIG_INTEL_VBTN) += intel-vbtn.o
obj-$(CONFIG_INTEL_SCU_IPC) += intel_scu_ipc.o

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@ -0,0 +1,143 @@
/*
* Intel Cherry Trail ACPI INT33FE pseudo device driver
*
* Copyright (C) 2017 Hans de Goede <hdegoede@redhat.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Some Intel Cherry Trail based device which ship with Windows 10, have
* this weird INT33FE ACPI device with a CRS table with 4 I2cSerialBusV2
* resources, for 4 different chips attached to various i2c busses:
* 1. The Whiskey Cove pmic, which is also described by the INT34D3 ACPI device
* 2. Maxim MAX17047 Fuel Gauge Controller
* 3. FUSB302 USB Type-C Controller
* 4. PI3USB30532 USB switch
*
* So this driver is a stub / pseudo driver whose only purpose is to
* instantiate i2c-clients for chips 2 - 4, so that standard i2c drivers
* for these chips can bind to the them.
*/
#include <linux/acpi.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/slab.h>
#define EXPECTED_PTYPE 4
struct cht_int33fe_data {
struct i2c_client *max17047;
struct i2c_client *fusb302;
struct i2c_client *pi3usb30532;
};
static int cht_int33fe_probe(struct i2c_client *client)
{
struct device *dev = &client->dev;
struct i2c_board_info board_info;
struct cht_int33fe_data *data;
unsigned long long ptyp;
acpi_status status;
int fusb302_irq;
status = acpi_evaluate_integer(ACPI_HANDLE(dev), "PTYP", NULL, &ptyp);
if (ACPI_FAILURE(status)) {
dev_err(dev, "Error getting PTYPE\n");
return -ENODEV;
}
/*
* The same ACPI HID is used for different configurations check PTYP
* to ensure that we are dealing with the expected config.
*/
if (ptyp != EXPECTED_PTYPE)
return -ENODEV;
/* The FUSB302 uses the irq at index 1 and is the only irq user */
fusb302_irq = acpi_dev_gpio_irq_get(ACPI_COMPANION(dev), 1);
if (fusb302_irq < 0) {
if (fusb302_irq != -EPROBE_DEFER)
dev_err(dev, "Error getting FUSB302 irq\n");
return fusb302_irq;
}
data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
if (!data)
return -ENOMEM;
memset(&board_info, 0, sizeof(board_info));
strlcpy(board_info.type, "max17047", I2C_NAME_SIZE);
data->max17047 = i2c_acpi_new_device(dev, 1, &board_info);
if (!data->max17047)
return -EPROBE_DEFER; /* Wait for the i2c-adapter to load */
memset(&board_info, 0, sizeof(board_info));
strlcpy(board_info.type, "fusb302", I2C_NAME_SIZE);
board_info.irq = fusb302_irq;
data->fusb302 = i2c_acpi_new_device(dev, 2, &board_info);
if (!data->fusb302)
goto out_unregister_max17047;
memset(&board_info, 0, sizeof(board_info));
strlcpy(board_info.type, "pi3usb30532", I2C_NAME_SIZE);
data->pi3usb30532 = i2c_acpi_new_device(dev, 3, &board_info);
if (!data->pi3usb30532)
goto out_unregister_fusb302;
i2c_set_clientdata(client, data);
return 0;
out_unregister_fusb302:
i2c_unregister_device(data->fusb302);
out_unregister_max17047:
i2c_unregister_device(data->max17047);
return -EPROBE_DEFER; /* Wait for the i2c-adapter to load */
}
static int cht_int33fe_remove(struct i2c_client *i2c)
{
struct cht_int33fe_data *data = i2c_get_clientdata(i2c);
i2c_unregister_device(data->pi3usb30532);
i2c_unregister_device(data->fusb302);
i2c_unregister_device(data->max17047);
return 0;
}
static const struct i2c_device_id cht_int33fe_i2c_id[] = {
{ }
};
MODULE_DEVICE_TABLE(i2c, cht_int33fe_i2c_id);
static const struct acpi_device_id cht_int33fe_acpi_ids[] = {
{ "INT33FE", },
{ }
};
MODULE_DEVICE_TABLE(acpi, cht_int33fe_acpi_ids);
static struct i2c_driver cht_int33fe_driver = {
.driver = {
.name = "Intel Cherry Trail ACPI INT33FE driver",
.acpi_match_table = ACPI_PTR(cht_int33fe_acpi_ids),
},
.probe_new = cht_int33fe_probe,
.remove = cht_int33fe_remove,
.id_table = cht_int33fe_i2c_id,
.disable_i2c_core_irq_mapping = true,
};
module_i2c_driver(cht_int33fe_driver);
MODULE_DESCRIPTION("Intel Cherry Trail ACPI INT33FE pseudo device driver");
MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
MODULE_LICENSE("GPL");