1/* 2 * Copyright (C) 2010 Broadcom 3 * Copyright (C) 2012 Stephen Warren 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 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 18 */ 19 20#include <linux/clk-provider.h> 21#include <linux/clkdev.h> 22#include <linux/clk/bcm2835.h> 23#include <linux/of.h> 24 25/* 26 * These are fixed clocks. They're probably not all root clocks and it may 27 * be possible to turn them on and off but until this is mapped out better 28 * it's the only way they can be used. 29 */ 30void __init bcm2835_init_clocks(void) 31{ 32 struct clk *clk; 33 int ret; 34 35 clk = clk_register_fixed_rate(NULL, "sys_pclk", NULL, CLK_IS_ROOT, 36 250000000); 37 if (IS_ERR(clk)) 38 pr_err("sys_pclk not registered\n"); 39 40 clk = clk_register_fixed_rate(NULL, "apb_pclk", NULL, CLK_IS_ROOT, 41 126000000); 42 if (IS_ERR(clk)) 43 pr_err("apb_pclk not registered\n"); 44 45 clk = clk_register_fixed_rate(NULL, "uart0_pclk", NULL, CLK_IS_ROOT, 46 3000000); 47 if (IS_ERR(clk)) 48 pr_err("uart0_pclk not registered\n"); 49 ret = clk_register_clkdev(clk, NULL, "20201000.uart"); 50 if (ret) 51 pr_err("uart0_pclk alias not registered\n"); 52 53 clk = clk_register_fixed_rate(NULL, "uart1_pclk", NULL, CLK_IS_ROOT, 54 125000000); 55 if (IS_ERR(clk)) 56 pr_err("uart1_pclk not registered\n"); 57 ret = clk_register_clkdev(clk, NULL, "20215000.uart"); 58 if (ret) 59 pr_err("uart1_pclk alias not registered\n"); 60} 61