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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/platform/x86/adv_swbutton.c | |
parent | Initial commit. (diff) | |
download | linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip |
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/platform/x86/adv_swbutton.c')
-rw-r--r-- | drivers/platform/x86/adv_swbutton.c | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/drivers/platform/x86/adv_swbutton.c b/drivers/platform/x86/adv_swbutton.c new file mode 100644 index 000000000..38693b735 --- /dev/null +++ b/drivers/platform/x86/adv_swbutton.c @@ -0,0 +1,121 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * adv_swbutton.c - Software Button Interface Driver. + * + * (C) Copyright 2020 Advantech Corporation, Inc + * + */ +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/input.h> +#include <linux/acpi.h> +#include <linux/platform_device.h> + +#define ACPI_BUTTON_HID_SWBTN "AHC0310" + +#define ACPI_BUTTON_NOTIFY_SWBTN_RELEASE 0x86 +#define ACPI_BUTTON_NOTIFY_SWBTN_PRESSED 0x85 + +struct adv_swbutton { + struct input_dev *input; + char phys[32]; +}; + +/*------------------------------------------------------------------------- + * Driver Interface + *-------------------------------------------------------------------------- + */ +static void adv_swbutton_notify(acpi_handle handle, u32 event, void *context) +{ + struct platform_device *device = context; + struct adv_swbutton *button = dev_get_drvdata(&device->dev); + + switch (event) { + case ACPI_BUTTON_NOTIFY_SWBTN_RELEASE: + input_report_key(button->input, KEY_PROG1, 0); + input_sync(button->input); + break; + case ACPI_BUTTON_NOTIFY_SWBTN_PRESSED: + input_report_key(button->input, KEY_PROG1, 1); + input_sync(button->input); + break; + default: + dev_dbg(&device->dev, "Unsupported event [0x%x]\n", event); + } +} + +static int adv_swbutton_probe(struct platform_device *device) +{ + struct adv_swbutton *button; + struct input_dev *input; + acpi_handle handle = ACPI_HANDLE(&device->dev); + acpi_status status; + int error; + + button = devm_kzalloc(&device->dev, sizeof(*button), GFP_KERNEL); + if (!button) + return -ENOMEM; + + dev_set_drvdata(&device->dev, button); + + input = devm_input_allocate_device(&device->dev); + if (!input) + return -ENOMEM; + + button->input = input; + snprintf(button->phys, sizeof(button->phys), "%s/button/input0", ACPI_BUTTON_HID_SWBTN); + + input->name = "Advantech Software Button"; + input->phys = button->phys; + input->id.bustype = BUS_HOST; + input->dev.parent = &device->dev; + set_bit(EV_REP, input->evbit); + input_set_capability(input, EV_KEY, KEY_PROG1); + + error = input_register_device(input); + if (error) + return error; + + device_init_wakeup(&device->dev, true); + + status = acpi_install_notify_handler(handle, + ACPI_DEVICE_NOTIFY, + adv_swbutton_notify, + device); + if (ACPI_FAILURE(status)) { + dev_err(&device->dev, "Error installing notify handler\n"); + return -EIO; + } + + return 0; +} + +static int adv_swbutton_remove(struct platform_device *device) +{ + acpi_handle handle = ACPI_HANDLE(&device->dev); + + acpi_remove_notify_handler(handle, ACPI_DEVICE_NOTIFY, + adv_swbutton_notify); + + return 0; +} + +static const struct acpi_device_id button_device_ids[] = { + {ACPI_BUTTON_HID_SWBTN, 0}, + {"", 0}, +}; +MODULE_DEVICE_TABLE(acpi, button_device_ids); + +static struct platform_driver adv_swbutton_driver = { + .driver = { + .name = "adv_swbutton", + .acpi_match_table = button_device_ids, + }, + .probe = adv_swbutton_probe, + .remove = adv_swbutton_remove, +}; +module_platform_driver(adv_swbutton_driver); + +MODULE_AUTHOR("Andrea Ho"); +MODULE_DESCRIPTION("Advantech ACPI SW Button Driver"); +MODULE_LICENSE("GPL v2"); |