LXR linux/drivers/clk/sunxi/clk-a10-codec.c

   1/*
   2 * Copyright 2013 Emilio López
   3 *
   4 * Emilio López <emilio@elopez.com.ar>
   5 *
   6 * This program is free software; you can redistribute it and/or modify
   7 * it under the terms of the GNU General Public License as published by
   8 * the Free Software Foundation; either version 2 of the License, or
   9 * (at your option) any later version.
  10 *
  11 * This program is distributed in the hope that it will be useful,
  12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 * GNU General Public License for more details.
  15 */
  16
  17#include <linux/clk-provider.h>
  18#include <linux/of.h>
  19#include <linux/of_address.h>
  20
  21#define SUN4I_CODEC_GATE        31
  22
  23static void __init sun4i_codec_clk_setup(struct device_node *node)
  24{
  25        struct clk *clk;
  26        const char *clk_name = node->name, *parent_name;
  27        void __iomem *reg;
  28
  29        reg = of_io_request_and_map(node, 0, of_node_full_name(node));
  30        if (IS_ERR(reg))
  31                return;
  32
  33        of_property_read_string(node, "clock-output-names", &clk_name);
  34        parent_name = of_clk_get_parent_name(node, 0);
  35
  36        clk = clk_register_gate(NULL, clk_name, parent_name,
  37                                CLK_SET_RATE_PARENT, reg,
  38                                SUN4I_CODEC_GATE, 0, NULL);
  39
  40        if (!IS_ERR(clk))
  41                of_clk_add_provider(node, of_clk_src_simple_get, clk);
  42}
  43CLK_OF_DECLARE(sun4i_codec, "allwinner,sun4i-a10-codec-clk",
  44               sun4i_codec_clk_setup);
  45