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

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Copyright 2013 Emilio López
   4  *
   5  * Emilio López <emilio@elopez.com.ar>
   6  */
   7
   8 #include <linux/clk-provider.h>
   9 #include <linux/of.h>
  10 #include <linux/of_address.h>
  11
  12 #define SUN4I_CODEC_GATE        31
  13
  14 static void __init sun4i_codec_clk_setup(struct device_node *node)
  15 {
  16         struct clk *clk;
  17         const char *clk_name = node->name, *parent_name;
  18         void __iomem *reg;
  19
  20         reg = of_io_request_and_map(node, 0, of_node_full_name(node));
  21         if (IS_ERR(reg))
  22                 return;
  23
  24         of_property_read_string(node, "clock-output-names", &clk_name);
  25         parent_name = of_clk_get_parent_name(node, 0);
  26
  27         clk = clk_register_gate(NULL, clk_name, parent_name,
  28                                 CLK_SET_RATE_PARENT, reg,
  29                                 SUN4I_CODEC_GATE, 0, NULL);
  30
  31         if (!IS_ERR(clk))
  32                 of_clk_add_provider(node, of_clk_src_simple_get, clk);
  33 }
  34 CLK_OF_DECLARE(sun4i_codec, "allwinner,sun4i-a10-codec-clk",
  35                sun4i_codec_clk_setup);