v4.19.13 snapshot.
diff --git a/drivers/input/misc/atlas_btns.c b/drivers/input/misc/atlas_btns.c
new file mode 100644
index 0000000..6423aac
--- /dev/null
+++ b/drivers/input/misc/atlas_btns.c
@@ -0,0 +1,158 @@
+/*
+ * atlas_btns.c - Atlas Wallmount Touchscreen ACPI Extras
+ *
+ * Copyright (C) 2006 Jaya Kumar
+ * Based on Toshiba ACPI by John Belmonte and ASUS ACPI
+ * This work was sponsored by CIS(M) Sdn Bhd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/input.h>
+#include <linux/types.h>
+#include <linux/acpi.h>
+#include <linux/uaccess.h>
+
+#define ACPI_ATLAS_NAME "Atlas ACPI"
+#define ACPI_ATLAS_CLASS "Atlas"
+
+static unsigned short atlas_keymap[16];
+static struct input_dev *input_dev;
+
+/* button handling code */
+static acpi_status acpi_atlas_button_setup(acpi_handle region_handle,
+ u32 function, void *handler_context, void **return_context)
+{
+ *return_context =
+ (function != ACPI_REGION_DEACTIVATE) ? handler_context : NULL;
+
+ return AE_OK;
+}
+
+static acpi_status acpi_atlas_button_handler(u32 function,
+ acpi_physical_address address,
+ u32 bit_width, u64 *value,
+ void *handler_context, void *region_context)
+{
+ acpi_status status;
+
+ if (function == ACPI_WRITE) {
+ int code = address & 0x0f;
+ int key_down = !(address & 0x10);
+
+ input_event(input_dev, EV_MSC, MSC_SCAN, code);
+ input_report_key(input_dev, atlas_keymap[code], key_down);
+ input_sync(input_dev);
+
+ status = AE_OK;
+ } else {
+ pr_warn("shrugged on unexpected function: function=%x,address=%lx,value=%x\n",
+ function, (unsigned long)address, (u32)*value);
+ status = AE_BAD_PARAMETER;
+ }
+
+ return status;
+}
+
+static int atlas_acpi_button_add(struct acpi_device *device)
+{
+ acpi_status status;
+ int i;
+ int err;
+
+ input_dev = input_allocate_device();
+ if (!input_dev) {
+ pr_err("unable to allocate input device\n");
+ return -ENOMEM;
+ }
+
+ input_dev->name = "Atlas ACPI button driver";
+ input_dev->phys = "ASIM0000/atlas/input0";
+ input_dev->id.bustype = BUS_HOST;
+ input_dev->keycode = atlas_keymap;
+ input_dev->keycodesize = sizeof(unsigned short);
+ input_dev->keycodemax = ARRAY_SIZE(atlas_keymap);
+
+ input_set_capability(input_dev, EV_MSC, MSC_SCAN);
+ __set_bit(EV_KEY, input_dev->evbit);
+ for (i = 0; i < ARRAY_SIZE(atlas_keymap); i++) {
+ if (i < 9) {
+ atlas_keymap[i] = KEY_F1 + i;
+ __set_bit(KEY_F1 + i, input_dev->keybit);
+ } else
+ atlas_keymap[i] = KEY_RESERVED;
+ }
+
+ err = input_register_device(input_dev);
+ if (err) {
+ pr_err("couldn't register input device\n");
+ input_free_device(input_dev);
+ return err;
+ }
+
+ /* hookup button handler */
+ status = acpi_install_address_space_handler(device->handle,
+ 0x81, &acpi_atlas_button_handler,
+ &acpi_atlas_button_setup, device);
+ if (ACPI_FAILURE(status)) {
+ pr_err("error installing addr spc handler\n");
+ input_unregister_device(input_dev);
+ err = -EINVAL;
+ }
+
+ return err;
+}
+
+static int atlas_acpi_button_remove(struct acpi_device *device)
+{
+ acpi_status status;
+
+ status = acpi_remove_address_space_handler(device->handle,
+ 0x81, &acpi_atlas_button_handler);
+ if (ACPI_FAILURE(status))
+ pr_err("error removing addr spc handler\n");
+
+ input_unregister_device(input_dev);
+
+ return 0;
+}
+
+static const struct acpi_device_id atlas_device_ids[] = {
+ {"ASIM0000", 0},
+ {"", 0},
+};
+MODULE_DEVICE_TABLE(acpi, atlas_device_ids);
+
+static struct acpi_driver atlas_acpi_driver = {
+ .name = ACPI_ATLAS_NAME,
+ .class = ACPI_ATLAS_CLASS,
+ .owner = THIS_MODULE,
+ .ids = atlas_device_ids,
+ .ops = {
+ .add = atlas_acpi_button_add,
+ .remove = atlas_acpi_button_remove,
+ },
+};
+module_acpi_driver(atlas_acpi_driver);
+
+MODULE_AUTHOR("Jaya Kumar");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Atlas button driver");
+