drivers/input/vivaldi-fmap.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Helpers for ChromeOS Vivaldi keyboard function row mapping
   4  *
   5  * Copyright (C) 2022 Google, Inc
   6  */
   7
   8 #include <linux/export.h>
   9 #include <linux/input/vivaldi-fmap.h>
  10 #include <linux/kernel.h>
  11 #include <linux/module.h>
  12 #include <linux/types.h>
  13
  14 /**
  15  * vivaldi_function_row_physmap_show - Print vivaldi function row physmap attribute
  16  * @data: The vivaldi function row map
  17  * @buf: Buffer to print the function row phsymap to
  18  */
  19 ssize_t vivaldi_function_row_physmap_show(const struct vivaldi_data *data,
  20                                           char *buf)
  21 {
  22         ssize_t size = 0;
  23         int i;
  24         const u32 *physmap = data->function_row_physmap;
  25
  26         if (!data->num_function_row_keys)
  27                 return 0;
  28
  29         for (i = 0; i < data->num_function_row_keys; i++)
  30                 size += sysfs_emit_at(buf, size,
  31                                       "%s%02X", size ? " " : "", physmap[i]);
  32         if (size)
  33                 size += sysfs_emit_at(buf, size, "\n");
  34
  35         return size;
  36 }
  37 EXPORT_SYMBOL_GPL(vivaldi_function_row_physmap_show);
  38
  39 MODULE_DESCRIPTION("Helpers for ChromeOS Vivaldi keyboard function row mapping");
  40 MODULE_LICENSE("GPL");