1 /* 2 * drivers/clk/at91/sckc.c 3 * 4 * Copyright (C) 2013 Boris BREZILLON <b.brezillon@overkiz.com> 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 */ 12 13 #include <linux/clk-provider.h> 14 #include <linux/clkdev.h> 15 #include <linux/of.h> 16 #include <linux/of_address.h> 17 #include <linux/io.h> 18 19 #include "sckc.h" 20 21 static const struct of_device_id sckc_clk_ids[] __initconst = { 22 /* Slow clock */ 23 { 24 .compatible = "atmel,at91sam9x5-clk-slow-osc", 25 .data = of_at91sam9x5_clk_slow_osc_setup, 26 }, 27 { 28 .compatible = "atmel,at91sam9x5-clk-slow-rc-osc", 29 .data = of_at91sam9x5_clk_slow_rc_osc_setup, 30 }, 31 { 32 .compatible = "atmel,at91sam9x5-clk-slow", 33 .data = of_at91sam9x5_clk_slow_setup, 34 }, 35 { /*sentinel*/ } 36 }; 37 38 static void __init of_at91sam9x5_sckc_setup(struct device_node *np) 39 { 40 struct device_node *childnp; 41 void (*clk_setup)(struct device_node *, void __iomem *); 42 const struct of_device_id *clk_id; 43 void __iomem *regbase = of_iomap(np, 0); 44 45 if (!regbase) 46 return; 47 48 for_each_child_of_node(np, childnp) { 49 clk_id = of_match_node(sckc_clk_ids, childnp); 50 if (!clk_id) 51 continue; 52 clk_setup = clk_id->data; 53 clk_setup(childnp, regbase); 54 } 55 } 56 CLK_OF_DECLARE(at91sam9x5_clk_sckc, "atmel,at91sam9x5-sckc", 57 of_at91sam9x5_sckc_setup); 58