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

/*
 * OMAP interface clock support
 *
 * Copyright (C) 2013 Texas Instruments, Inc.
 *
 * Tero Kristo <t-kristo@ti.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
 * kind, whether express or implied; without even the implied warranty
 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#include <linux/clk-provider.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/clk/ti.h>
#include "clock.h"

#undef pr_fmt
#define pr_fmt(fmt) "%s: " fmt, __func__

static const struct clk_ops ti_interface_clk_ops = {
	.init		= &omap2_init_clk_clkdm,
	.enable		= &omap2_dflt_clk_enable,
	.disable	= &omap2_dflt_clk_disable,
	.is_enabled	= &omap2_dflt_clk_is_enabled,
};

static struct clk *_register_interface(struct device *dev, const char *name,
				       const char *parent_name,
				       struct clk_omap_reg *reg, u8 bit_idx,
				       const struct clk_hw_omap_ops *ops)
{
	struct clk_init_data init = { NULL };
	struct clk_hw_omap *clk_hw;
	struct clk *clk;

	clk_hw = kzalloc(sizeof(*clk_hw), GFP_KERNEL);
	if (!clk_hw)
		return ERR_PTR(-ENOMEM);

	clk_hw->hw.init = &init;
	clk_hw->ops = ops;
	memcpy(&clk_hw->enable_reg, reg, sizeof(*reg));
	clk_hw->enable_bit = bit_idx;

	init.name = name;
	init.ops = &ti_interface_clk_ops;
	init.flags = 0;

	init.num_parents = 1;
	init.parent_names = &parent_name;

	clk = ti_clk_register(NULL, &clk_hw->hw, name);

	if (IS_ERR(clk))
		kfree(clk_hw);
	else
		omap2_init_clk_hw_omap_clocks(&clk_hw->hw);

	return clk;
}

static void __init _of_ti_interface_clk_setup(struct device_node *node,
					      const struct clk_hw_omap_ops *ops)
{
	struct clk *clk;
	const char *parent_name;
	struct clk_omap_reg reg;
	u8 enable_bit = 0;
	u32 val;

	if (ti_clk_get_reg_addr(node, 0, &reg))
		return;

	if (!of_property_read_u32(node, "ti,bit-shift", &val))
		enable_bit = val;

	parent_name = of_clk_get_parent_name(node, 0);
	if (!parent_name) {
		pr_err("%s must have a parent\n", node->name);
		return;
	}

	clk = _register_interface(NULL, node->name, parent_name, &reg,
				  enable_bit, ops);

	if (!IS_ERR(clk))
		of_clk_add_provider(node, of_clk_src_simple_get, clk);
}

static void __init of_ti_interface_clk_setup(struct device_node *node)
{
	_of_ti_interface_clk_setup(node, &clkhwops_iclk_wait);
}
CLK_OF_DECLARE(ti_interface_clk, "ti,omap3-interface-clock",
	       of_ti_interface_clk_setup);

static void __init of_ti_no_wait_interface_clk_setup(struct device_node *node)
{
	_of_ti_interface_clk_setup(node, &clkhwops_iclk);
}
CLK_OF_DECLARE(ti_no_wait_interface_clk, "ti,omap3-no-wait-interface-clock",
	       of_ti_no_wait_interface_clk_setup);

#ifdef CONFIG_ARCH_OMAP3
static void __init of_ti_hsotgusb_interface_clk_setup(struct device_node *node)
{
	_of_ti_interface_clk_setup(node,
				   &clkhwops_omap3430es2_iclk_hsotgusb_wait);
}
CLK_OF_DECLARE(ti_hsotgusb_interface_clk, "ti,omap3-hsotgusb-interface-clock",
	       of_ti_hsotgusb_interface_clk_setup);

static void __init of_ti_dss_interface_clk_setup(struct device_node *node)
{
	_of_ti_interface_clk_setup(node,
				   &clkhwops_omap3430es2_iclk_dss_usbhost_wait);
}
CLK_OF_DECLARE(ti_dss_interface_clk, "ti,omap3-dss-interface-clock",
	       of_ti_dss_interface_clk_setup);

static void __init of_ti_ssi_interface_clk_setup(struct device_node *node)
{
	_of_ti_interface_clk_setup(node, &clkhwops_omap3430es2_iclk_ssi_wait);
}
CLK_OF_DECLARE(ti_ssi_interface_clk, "ti,omap3-ssi-interface-clock",
	       of_ti_ssi_interface_clk_setup);

static void __init of_ti_am35xx_interface_clk_setup(struct device_node *node)
{
	_of_ti_interface_clk_setup(node, &clkhwops_am35xx_ipss_wait);
}
CLK_OF_DECLARE(ti_am35xx_interface_clk, "ti,am35xx-interface-clock",
	       of_ti_am35xx_interface_clk_setup);
#endif

#ifdef CONFIG_SOC_OMAP2430
static void __init of_ti_omap2430_interface_clk_setup(struct device_node *node)
{
	_of_ti_interface_clk_setup(node, &clkhwops_omap2430_i2chs_wait);
}
CLK_OF_DECLARE(ti_omap2430_interface_clk, "ti,omap2430-interface-clock",
	       of_ti_omap2430_interface_clk_setup);
#endif
Commit	Line	Data
24582b34 TK	1	/*
	2	* OMAP interface clock support
	3	*
	4	* Copyright (C) 2013 Texas Instruments, Inc.
	5	*
	6	* Tero Kristo <t-kristo@ti.com>
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License version 2 as
	10	* published by the Free Software Foundation.
	11	*
	12	* This program is distributed "as is" WITHOUT ANY WARRANTY of any
	13	* kind, whether express or implied; without even the implied warranty
	14	* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*/
	17
	18	#include <linux/clk-provider.h>
	19	#include <linux/slab.h>
	20	#include <linux/of.h>
	21	#include <linux/of_address.h>
	22	#include <linux/clk/ti.h>
06524fa4	23	#include "clock.h"
24582b34 TK	24
	25	#undef pr_fmt
	26	#define pr_fmt(fmt) "%s: " fmt, __func__
	27
	28	static const struct clk_ops ti_interface_clk_ops = {
	29	.init = &omap2_init_clk_clkdm,
	30	.enable = &omap2_dflt_clk_enable,
	31	.disable = &omap2_dflt_clk_disable,
	32	.is_enabled = &omap2_dflt_clk_is_enabled,
	33	};
	34
06524fa4 TK	35	static struct clk _register_interface(struct device dev, const char *name,
06524fa4 TK	36	const char *parent_name,
6c0afb50	37	struct clk_omap_reg *reg, u8 bit_idx,
06524fa4	38	const struct clk_hw_omap_ops *ops)
24582b34	39	{
24582b34 TK	40	struct clk_init_data init = { NULL };
24582b34 TK	41	struct clk_hw_omap *clk_hw;
06524fa4	42	struct clk *clk;
24582b34 TK	43
	44	clk_hw = kzalloc(sizeof(*clk_hw), GFP_KERNEL);
	45	if (!clk_hw)
06524fa4	46	return ERR_PTR(-ENOMEM);
24582b34 TK	47
	48	clk_hw->hw.init = &init;
	49	clk_hw->ops = ops;
6c0afb50	50	memcpy(&clk_hw->enable_reg, reg, sizeof(*reg));
06524fa4	51	clk_hw->enable_bit = bit_idx;
24582b34	52
06524fa4	53	init.name = name;
24582b34 TK	54	init.ops = &ti_interface_clk_ops;
	55	init.flags = 0;
	56
24582b34 TK	57	init.num_parents = 1;
	58	init.parent_names = &parent_name;
	59
1ae79c46	60	clk = ti_clk_register(NULL, &clk_hw->hw, name);
24582b34	61
06524fa4 TK	62	if (IS_ERR(clk))
	63	kfree(clk_hw);
	64	else
98d8a60e	65	omap2_init_clk_hw_omap_clocks(&clk_hw->hw);
06524fa4 TK	66
	67	return clk;
	68	}
	69
06524fa4 TK	70	static void __init _of_ti_interface_clk_setup(struct device_node *node,
	71	const struct clk_hw_omap_ops *ops)
	72	{
	73	struct clk *clk;
	74	const char *parent_name;
6c0afb50	75	struct clk_omap_reg reg;
06524fa4 TK	76	u8 enable_bit = 0;
	77	u32 val;
	78
6c0afb50	79	if (ti_clk_get_reg_addr(node, 0, &reg))
06524fa4 TK	80	return;
	81
	82	if (!of_property_read_u32(node, "ti,bit-shift", &val))
	83	enable_bit = val;
	84
	85	parent_name = of_clk_get_parent_name(node, 0);
	86	if (!parent_name) {
	87	pr_err("%s must have a parent\n", node->name);
24582b34 TK	88	return;
	89	}
	90
6c0afb50	91	clk = _register_interface(NULL, node->name, parent_name, &reg,
06524fa4 TK	92	enable_bit, ops);
	93
	94	if (!IS_ERR(clk))
	95	of_clk_add_provider(node, of_clk_src_simple_get, clk);
24582b34 TK	96	}
	97
	98	static void __init of_ti_interface_clk_setup(struct device_node *node)
	99	{
	100	_of_ti_interface_clk_setup(node, &clkhwops_iclk_wait);
	101	}
	102	CLK_OF_DECLARE(ti_interface_clk, "ti,omap3-interface-clock",
	103	of_ti_interface_clk_setup);
	104
	105	static void __init of_ti_no_wait_interface_clk_setup(struct device_node *node)
	106	{
	107	_of_ti_interface_clk_setup(node, &clkhwops_iclk);
	108	}
	109	CLK_OF_DECLARE(ti_no_wait_interface_clk, "ti,omap3-no-wait-interface-clock",
	110	of_ti_no_wait_interface_clk_setup);
	111
de742570	112	#ifdef CONFIG_ARCH_OMAP3
24582b34 TK	113	static void __init of_ti_hsotgusb_interface_clk_setup(struct device_node *node)
	114	{
	115	_of_ti_interface_clk_setup(node,
	116	&clkhwops_omap3430es2_iclk_hsotgusb_wait);
	117	}
	118	CLK_OF_DECLARE(ti_hsotgusb_interface_clk, "ti,omap3-hsotgusb-interface-clock",
	119	of_ti_hsotgusb_interface_clk_setup);
	120
	121	static void __init of_ti_dss_interface_clk_setup(struct device_node *node)
	122	{
	123	_of_ti_interface_clk_setup(node,
	124	&clkhwops_omap3430es2_iclk_dss_usbhost_wait);
	125	}
	126	CLK_OF_DECLARE(ti_dss_interface_clk, "ti,omap3-dss-interface-clock",
	127	of_ti_dss_interface_clk_setup);
	128
	129	static void __init of_ti_ssi_interface_clk_setup(struct device_node *node)
	130	{
	131	_of_ti_interface_clk_setup(node, &clkhwops_omap3430es2_iclk_ssi_wait);
	132	}
	133	CLK_OF_DECLARE(ti_ssi_interface_clk, "ti,omap3-ssi-interface-clock",
	134	of_ti_ssi_interface_clk_setup);
	135
	136	static void __init of_ti_am35xx_interface_clk_setup(struct device_node *node)
	137	{
	138	_of_ti_interface_clk_setup(node, &clkhwops_am35xx_ipss_wait);
	139	}
	140	CLK_OF_DECLARE(ti_am35xx_interface_clk, "ti,am35xx-interface-clock",
	141	of_ti_am35xx_interface_clk_setup);
de742570 TK	142	#endif
	143
	144	#ifdef CONFIG_SOC_OMAP2430
	145	static void __init of_ti_omap2430_interface_clk_setup(struct device_node *node)
	146	{
	147	_of_ti_interface_clk_setup(node, &clkhwops_omap2430_i2chs_wait);
	148	}
	149	CLK_OF_DECLARE(ti_omap2430_interface_clk, "ti,omap2430-interface-clock",
	150	of_ti_omap2430_interface_clk_setup);
	151	#endif