b0d55983b2
Like the Asus T100TA the Asus T100TAF has a camera LED which is always on by default and both also use the same GPIO for the LED. Relax the DMI match for the Asus T100TA so that it also matches the T100TAF. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Link: https://lore.kernel.org/r/20220710173658.221528-1-hdegoede@redhat.com
117 lines
3 KiB
C
117 lines
3 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Driver for controlling LEDs for cameras connected to the Intel atomisp2
|
|
* The main purpose of this driver is to turn off LEDs which are on at boot.
|
|
*
|
|
* Copyright (C) 2020 Hans de Goede <hdegoede@redhat.com>
|
|
*/
|
|
|
|
#include <linux/dmi.h>
|
|
#include <linux/gpio/consumer.h>
|
|
#include <linux/gpio/machine.h>
|
|
#include <linux/leds.h>
|
|
#include <linux/module.h>
|
|
#include <linux/mod_devicetable.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/workqueue.h>
|
|
|
|
/* This must be leds-gpio as the leds-gpio driver binds to the name */
|
|
#define DEV_NAME "leds-gpio"
|
|
|
|
static const struct gpio_led atomisp2_leds[] = {
|
|
{
|
|
.name = "atomisp2::camera",
|
|
.default_state = LEDS_GPIO_DEFSTATE_OFF,
|
|
},
|
|
};
|
|
|
|
static const struct gpio_led_platform_data atomisp2_leds_pdata = {
|
|
.num_leds = ARRAY_SIZE(atomisp2_leds),
|
|
.leds = atomisp2_leds,
|
|
};
|
|
|
|
static struct gpiod_lookup_table asus_t100ta_lookup = {
|
|
.dev_id = DEV_NAME,
|
|
.table = {
|
|
GPIO_LOOKUP_IDX("INT33FC:02", 8, NULL, 0, GPIO_ACTIVE_HIGH),
|
|
{ }
|
|
}
|
|
};
|
|
|
|
static struct gpiod_lookup_table asus_t100chi_lookup = {
|
|
.dev_id = DEV_NAME,
|
|
.table = {
|
|
GPIO_LOOKUP_IDX("INT33FC:01", 24, NULL, 0, GPIO_ACTIVE_HIGH),
|
|
{ }
|
|
}
|
|
};
|
|
|
|
static const struct dmi_system_id atomisp2_led_systems[] __initconst = {
|
|
{
|
|
.matches = {
|
|
DMI_EXACT_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
|
|
/* Non exact match to also match T100TAF */
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "T100TA"),
|
|
},
|
|
.driver_data = &asus_t100ta_lookup,
|
|
},
|
|
{
|
|
.matches = {
|
|
DMI_EXACT_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
|
|
DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "T200TA"),
|
|
},
|
|
.driver_data = &asus_t100ta_lookup,
|
|
},
|
|
{
|
|
.matches = {
|
|
DMI_EXACT_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
|
|
DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "T100CHI"),
|
|
},
|
|
.driver_data = &asus_t100chi_lookup,
|
|
},
|
|
{} /* Terminating entry */
|
|
};
|
|
MODULE_DEVICE_TABLE(dmi, atomisp2_led_systems);
|
|
|
|
static struct gpiod_lookup_table *gpio_lookup;
|
|
static struct platform_device *pdev;
|
|
|
|
static int __init atomisp2_led_init(void)
|
|
{
|
|
const struct dmi_system_id *system;
|
|
|
|
system = dmi_first_match(atomisp2_led_systems);
|
|
if (!system)
|
|
return -ENODEV;
|
|
|
|
gpio_lookup = system->driver_data;
|
|
gpiod_add_lookup_table(gpio_lookup);
|
|
|
|
pdev = platform_device_register_resndata(NULL,
|
|
DEV_NAME, PLATFORM_DEVID_NONE,
|
|
NULL, 0, &atomisp2_leds_pdata,
|
|
sizeof(atomisp2_leds_pdata));
|
|
if (IS_ERR(pdev))
|
|
gpiod_remove_lookup_table(gpio_lookup);
|
|
|
|
return PTR_ERR_OR_ZERO(pdev);
|
|
}
|
|
|
|
static void __exit atomisp2_led_cleanup(void)
|
|
{
|
|
platform_device_unregister(pdev);
|
|
gpiod_remove_lookup_table(gpio_lookup);
|
|
}
|
|
|
|
module_init(atomisp2_led_init);
|
|
module_exit(atomisp2_led_cleanup);
|
|
|
|
/*
|
|
* The ACPI INIT method from Asus WMI's code on the T100TA and T200TA turns the
|
|
* LED on (without the WMI interface allowing further control over the LED).
|
|
* Ensure we are loaded after asus-nb-wmi so that we turn the LED off again.
|
|
*/
|
|
MODULE_SOFTDEP("pre: asus_nb_wmi");
|
|
MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com");
|
|
MODULE_DESCRIPTION("Intel atomisp2 camera LED driver");
|
|
MODULE_LICENSE("GPL");
|