drivers/clk/uniphier/clk-uniphier-fixed-factor.c

   1 /*
   2  * Copyright (C) 2016 Socionext Inc.
   3  *   Author: Masahiro Yamada <yamada.masahiro@socionext.com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  */
  15
  16 #include <linux/clk-provider.h>
  17 #include <linux/device.h>
  18
  19 #include "clk-uniphier.h"
  20
  21 struct clk_hw *uniphier_clk_register_fixed_factor(struct device *dev,
  22                                                   const char *name,
  23                         const struct uniphier_clk_fixed_factor_data *data)
  24 {
  25         struct clk_fixed_factor *fix;
  26         struct clk_init_data init;
  27         int ret;
  28
  29         fix = devm_kzalloc(dev, sizeof(*fix), GFP_KERNEL);
  30         if (!fix)
  31                 return ERR_PTR(-ENOMEM);
  32
  33         init.name = name;
  34         init.ops = &clk_fixed_factor_ops;
  35         init.flags = data->parent_name ? CLK_SET_RATE_PARENT : 0;
  36         init.parent_names = data->parent_name ? &data->parent_name : NULL;
  37         init.num_parents = data->parent_name ? 1 : 0;
  38
  39         fix->mult = data->mult;
  40         fix->div = data->div;
  41         fix->hw.init = &init;
  42
  43         ret = devm_clk_hw_register(dev, &fix->hw);
  44         if (ret)
  45                 return ERR_PTR(ret);
  46
  47         return &fix->hw;
  48 }