[linux-2.6-block.git] / drivers / clk / clk-bcm2835.c

/*
 * Copyright (C) 2010 Broadcom
 * Copyright (C) 2012 Stephen Warren
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include <linux/clk-provider.h>
#include <linux/clkdev.h>
#include <linux/clk/bcm2835.h>
#include <linux/of.h>

/*
 * These are fixed clocks. They're probably not all root clocks and it may
 * be possible to turn them on and off but until this is mapped out better
 * it's the only way they can be used.
 */
void __init bcm2835_init_clocks(void)
{
	struct clk *clk;
	int ret;

	clk = clk_register_fixed_rate(NULL, "sys_pclk", NULL, CLK_IS_ROOT,
					250000000);
	if (IS_ERR(clk))
		pr_err("sys_pclk not registered\n");

	clk = clk_register_fixed_rate(NULL, "apb_pclk", NULL, CLK_IS_ROOT,
					126000000);
	if (IS_ERR(clk))
		pr_err("apb_pclk not registered\n");

	clk = clk_register_fixed_rate(NULL, "uart0_pclk", NULL, CLK_IS_ROOT,
					3000000);
	if (IS_ERR(clk))
		pr_err("uart0_pclk not registered\n");
	ret = clk_register_clkdev(clk, NULL, "20201000.uart");
	if (ret)
		pr_err("uart0_pclk alias not registered\n");

	clk = clk_register_fixed_rate(NULL, "uart1_pclk", NULL, CLK_IS_ROOT,
					125000000);
	if (IS_ERR(clk))
		pr_err("uart1_pclk not registered\n");
	ret = clk_register_clkdev(clk, NULL, "20215000.uart");
	if (ret)
		pr_err("uart1_pclk alias not registered\n");
}
Commit	Line	Data
75fabc3f SA	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>
526d239c SW	23	#include <linux/of.h>
526d239c SW	24
75fabc3f SA	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	*/
	30	void __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);
0de9f23a	37	if (IS_ERR(clk))
75fabc3f SA	38	pr_err("sys_pclk not registered\n");
	39
	40	clk = clk_register_fixed_rate(NULL, "apb_pclk", NULL, CLK_IS_ROOT,
	41	126000000);
0de9f23a	42	if (IS_ERR(clk))
75fabc3f SA	43	pr_err("apb_pclk not registered\n");
	44
	45	clk = clk_register_fixed_rate(NULL, "uart0_pclk", NULL, CLK_IS_ROOT,
	46	3000000);
0de9f23a	47	if (IS_ERR(clk))
75fabc3f SA	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);
0de9f23a	55	if (IS_ERR(clk))
75fabc3f SA	56	pr_err("uart1_pclk not registered\n");
	57	ret = clk_register_clkdev(clk, NULL, "20215000.uart");
	58	if (ret)
686ea585	59	pr_err("uart1_pclk alias not registered\n");
75fabc3f	60	}