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 23 static 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 } 43 CLK_OF_DECLARE(sun4i_codec, "allwinner,sun4i-a10-codec-clk", 44 sun4i_codec_clk_setup); 45