mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
145 lines
3.2 KiB
145 lines
3.2 KiB
// SPDX-License-Identifier: GPL-2.0 |
|
/* |
|
* Common code for Intel Cherry Trail ACPI INT33FE pseudo device drivers |
|
* (USB Micro-B and Type-C connector variants). |
|
* |
|
* Copyright (c) 2019 Yauhen Kharuzhy <[email protected]> |
|
*/ |
|
|
|
#include <linux/acpi.h> |
|
#include <linux/i2c.h> |
|
#include <linux/module.h> |
|
#include <linux/platform_device.h> |
|
#include <linux/slab.h> |
|
|
|
#include "intel_cht_int33fe_common.h" |
|
|
|
#define EXPECTED_PTYPE 4 |
|
|
|
static int cht_int33fe_i2c_res_filter(struct acpi_resource *ares, void *data) |
|
{ |
|
struct acpi_resource_i2c_serialbus *sb; |
|
int *count = data; |
|
|
|
if (i2c_acpi_get_i2c_resource(ares, &sb)) |
|
(*count)++; |
|
|
|
return 1; |
|
} |
|
|
|
static int cht_int33fe_count_i2c_clients(struct device *dev) |
|
{ |
|
struct acpi_device *adev = ACPI_COMPANION(dev); |
|
LIST_HEAD(resource_list); |
|
int count = 0; |
|
int ret; |
|
|
|
ret = acpi_dev_get_resources(adev, &resource_list, |
|
cht_int33fe_i2c_res_filter, &count); |
|
acpi_dev_free_resource_list(&resource_list); |
|
if (ret < 0) |
|
return ret; |
|
|
|
return count; |
|
} |
|
|
|
static int cht_int33fe_check_hw_type(struct device *dev) |
|
{ |
|
unsigned long long ptyp; |
|
acpi_status status; |
|
int ret; |
|
|
|
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; |
|
|
|
/* Check presence of INT34D3 (hardware-rev 3) expected for ptype == 4 */ |
|
if (!acpi_dev_present("INT34D3", "1", 3)) { |
|
dev_err(dev, "Error PTYPE == %d, but no INT34D3 device\n", |
|
EXPECTED_PTYPE); |
|
return -ENODEV; |
|
} |
|
|
|
ret = cht_int33fe_count_i2c_clients(dev); |
|
if (ret < 0) |
|
return ret; |
|
|
|
switch (ret) { |
|
case 2: |
|
return INT33FE_HW_MICROB; |
|
case 4: |
|
return INT33FE_HW_TYPEC; |
|
default: |
|
return -ENODEV; |
|
} |
|
} |
|
|
|
static int cht_int33fe_probe(struct platform_device *pdev) |
|
{ |
|
struct cht_int33fe_data *data; |
|
struct device *dev = &pdev->dev; |
|
int ret; |
|
|
|
ret = cht_int33fe_check_hw_type(dev); |
|
if (ret < 0) |
|
return ret; |
|
|
|
data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); |
|
if (!data) |
|
return -ENOMEM; |
|
|
|
data->dev = dev; |
|
|
|
switch (ret) { |
|
case INT33FE_HW_MICROB: |
|
data->probe = cht_int33fe_microb_probe; |
|
data->remove = cht_int33fe_microb_remove; |
|
break; |
|
|
|
case INT33FE_HW_TYPEC: |
|
data->probe = cht_int33fe_typec_probe; |
|
data->remove = cht_int33fe_typec_remove; |
|
break; |
|
} |
|
|
|
platform_set_drvdata(pdev, data); |
|
|
|
return data->probe(data); |
|
} |
|
|
|
static int cht_int33fe_remove(struct platform_device *pdev) |
|
{ |
|
struct cht_int33fe_data *data = platform_get_drvdata(pdev); |
|
|
|
return data->remove(data); |
|
} |
|
|
|
static const struct acpi_device_id cht_int33fe_acpi_ids[] = { |
|
{ "INT33FE", }, |
|
{ } |
|
}; |
|
MODULE_DEVICE_TABLE(acpi, cht_int33fe_acpi_ids); |
|
|
|
static struct platform_driver cht_int33fe_driver = { |
|
.driver = { |
|
.name = "Intel Cherry Trail ACPI INT33FE driver", |
|
.acpi_match_table = ACPI_PTR(cht_int33fe_acpi_ids), |
|
}, |
|
.probe = cht_int33fe_probe, |
|
.remove = cht_int33fe_remove, |
|
}; |
|
|
|
module_platform_driver(cht_int33fe_driver); |
|
|
|
MODULE_DESCRIPTION("Intel Cherry Trail ACPI INT33FE pseudo device driver"); |
|
MODULE_AUTHOR("Yauhen Kharuzhy <[email protected]>"); |
|
MODULE_LICENSE("GPL v2");
|
|
|