mirror of
https://github.com/torvalds/linux.git
synced 2024-12-26 21:02:19 +00:00
ff44fe3e67
Change the names of DPTF participant drivers to adhere to the sysfs file naming conventions (no spaces present in the name in particular). Fixes:2ce6324ead("ACPI: DPTF: Add PCH FIVR participant driver") Fixes:6256ebd5da("ACPI / DPTF: Add DPTF power participant driver") Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reviewed-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Acked-by: Borislav Petkov <bp@suse.de>
127 lines
3.0 KiB
C
127 lines
3.0 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* dptf_pch_fivr: DPTF PCH FIVR Participant driver
|
|
* Copyright (c) 2020, Intel Corporation.
|
|
*/
|
|
|
|
#include <linux/acpi.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/platform_device.h>
|
|
|
|
/*
|
|
* Presentation of attributes which are defined for INT1045
|
|
* They are:
|
|
* freq_mhz_low_clock : Set PCH FIVR switching freq for
|
|
* FIVR clock 19.2MHz and 24MHz
|
|
* freq_mhz_high_clock : Set PCH FIVR switching freq for
|
|
* FIVR clock 38.4MHz
|
|
*/
|
|
#define PCH_FIVR_SHOW(name, method) \
|
|
static ssize_t name##_show(struct device *dev,\
|
|
struct device_attribute *attr,\
|
|
char *buf)\
|
|
{\
|
|
struct acpi_device *acpi_dev = dev_get_drvdata(dev);\
|
|
unsigned long long val;\
|
|
acpi_status status;\
|
|
\
|
|
status = acpi_evaluate_integer(acpi_dev->handle, #method,\
|
|
NULL, &val);\
|
|
if (ACPI_SUCCESS(status))\
|
|
return sprintf(buf, "%d\n", (int)val);\
|
|
else\
|
|
return -EINVAL;\
|
|
}
|
|
|
|
#define PCH_FIVR_STORE(name, method) \
|
|
static ssize_t name##_store(struct device *dev,\
|
|
struct device_attribute *attr,\
|
|
const char *buf, size_t count)\
|
|
{\
|
|
struct acpi_device *acpi_dev = dev_get_drvdata(dev);\
|
|
acpi_status status;\
|
|
u32 val;\
|
|
\
|
|
if (kstrtouint(buf, 0, &val) < 0)\
|
|
return -EINVAL;\
|
|
\
|
|
status = acpi_execute_simple_method(acpi_dev->handle, #method, val);\
|
|
if (ACPI_SUCCESS(status))\
|
|
return count;\
|
|
\
|
|
return -EINVAL;\
|
|
}
|
|
|
|
PCH_FIVR_SHOW(freq_mhz_low_clock, GFC0)
|
|
PCH_FIVR_SHOW(freq_mhz_high_clock, GFC1)
|
|
PCH_FIVR_STORE(freq_mhz_low_clock, RFC0)
|
|
PCH_FIVR_STORE(freq_mhz_high_clock, RFC1)
|
|
|
|
static DEVICE_ATTR_RW(freq_mhz_low_clock);
|
|
static DEVICE_ATTR_RW(freq_mhz_high_clock);
|
|
|
|
static struct attribute *fivr_attrs[] = {
|
|
&dev_attr_freq_mhz_low_clock.attr,
|
|
&dev_attr_freq_mhz_high_clock.attr,
|
|
NULL
|
|
};
|
|
|
|
static const struct attribute_group pch_fivr_attribute_group = {
|
|
.attrs = fivr_attrs,
|
|
.name = "pch_fivr_switch_frequency"
|
|
};
|
|
|
|
static int pch_fivr_add(struct platform_device *pdev)
|
|
{
|
|
struct acpi_device *acpi_dev;
|
|
unsigned long long ptype;
|
|
acpi_status status;
|
|
int result;
|
|
|
|
acpi_dev = ACPI_COMPANION(&(pdev->dev));
|
|
if (!acpi_dev)
|
|
return -ENODEV;
|
|
|
|
status = acpi_evaluate_integer(acpi_dev->handle, "PTYP", NULL, &ptype);
|
|
if (ACPI_FAILURE(status) || ptype != 0x05)
|
|
return -ENODEV;
|
|
|
|
result = sysfs_create_group(&pdev->dev.kobj,
|
|
&pch_fivr_attribute_group);
|
|
if (result)
|
|
return result;
|
|
|
|
platform_set_drvdata(pdev, acpi_dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pch_fivr_remove(struct platform_device *pdev)
|
|
{
|
|
sysfs_remove_group(&pdev->dev.kobj, &pch_fivr_attribute_group);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct acpi_device_id pch_fivr_device_ids[] = {
|
|
{"INTC1045", 0},
|
|
{"", 0},
|
|
};
|
|
MODULE_DEVICE_TABLE(acpi, pch_fivr_device_ids);
|
|
|
|
static struct platform_driver pch_fivr_driver = {
|
|
.probe = pch_fivr_add,
|
|
.remove = pch_fivr_remove,
|
|
.driver = {
|
|
.name = "dptf_pch_fivr",
|
|
.acpi_match_table = pch_fivr_device_ids,
|
|
},
|
|
};
|
|
|
|
module_platform_driver(pch_fivr_driver);
|
|
|
|
MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_DESCRIPTION("ACPI DPTF PCH FIVR driver");
|