[deliverable/linux.git] / arch / arm / mach-msm / clock-pcom.c

/*
 * Copyright (C) 2007 Google, Inc.
 * Copyright (c) 2007-2010, Code Aurora Forum. All rights reserved.
 *
 * This software is licensed under the terms of the GNU General Public
 * License version 2, as published by the Free Software Foundation, and
 * may be copied, distributed, and modified under those terms.
 *
 * 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.
 *
 */

#include <linux/err.h>
#include <linux/ctype.h>
#include <linux/stddef.h>
#include <mach/clk.h>

#include "proc_comm.h"
#include "clock.h"
#include "clock-pcom.h"

/*
 * glue for the proc_comm interface
 */
static int pc_clk_enable(unsigned id)
{
	int rc = msm_proc_comm(PCOM_CLKCTL_RPC_ENABLE, &id, NULL);
	if (rc < 0)
		return rc;
	else
		return (int)id < 0 ? -EINVAL : 0;
}

static void pc_clk_disable(unsigned id)
{
	msm_proc_comm(PCOM_CLKCTL_RPC_DISABLE, &id, NULL);
}

int pc_clk_reset(unsigned id, enum clk_reset_action action)
{
	int rc;

	if (action == CLK_RESET_ASSERT)
		rc = msm_proc_comm(PCOM_CLKCTL_RPC_RESET_ASSERT, &id, NULL);
	else
		rc = msm_proc_comm(PCOM_CLKCTL_RPC_RESET_DEASSERT, &id, NULL);

	if (rc < 0)
		return rc;
	else
		return (int)id < 0 ? -EINVAL : 0;
}

static int pc_clk_set_rate(unsigned id, unsigned rate)
{
	/* The rate _might_ be rounded off to the nearest KHz value by the
	 * remote function. So a return value of 0 doesn't necessarily mean
	 * that the exact rate was set successfully.
	 */
	int rc = msm_proc_comm(PCOM_CLKCTL_RPC_SET_RATE, &id, &rate);
	if (rc < 0)
		return rc;
	else
		return (int)id < 0 ? -EINVAL : 0;
}

static int pc_clk_set_min_rate(unsigned id, unsigned rate)
{
	int rc = msm_proc_comm(PCOM_CLKCTL_RPC_MIN_RATE, &id, &rate);
	if (rc < 0)
		return rc;
	else
		return (int)id < 0 ? -EINVAL : 0;
}

static int pc_clk_set_max_rate(unsigned id, unsigned rate)
{
	int rc = msm_proc_comm(PCOM_CLKCTL_RPC_MAX_RATE, &id, &rate);
	if (rc < 0)
		return rc;
	else
		return (int)id < 0 ? -EINVAL : 0;
}

static int pc_clk_set_flags(unsigned id, unsigned flags)
{
	int rc = msm_proc_comm(PCOM_CLKCTL_RPC_SET_FLAGS, &id, &flags);
	if (rc < 0)
		return rc;
	else
		return (int)id < 0 ? -EINVAL : 0;
}

static unsigned pc_clk_get_rate(unsigned id)
{
	if (msm_proc_comm(PCOM_CLKCTL_RPC_RATE, &id, NULL))
		return 0;
	else
		return id;
}

static unsigned pc_clk_is_enabled(unsigned id)
{
	if (msm_proc_comm(PCOM_CLKCTL_RPC_ENABLED, &id, NULL))
		return 0;
	else
		return id;
}

static long pc_clk_round_rate(unsigned id, unsigned rate)
{

	/* Not really supported; pc_clk_set_rate() does rounding on it's own. */
	return rate;
}

static bool pc_clk_is_local(unsigned id)
{
	return false;
}

struct clk_ops clk_ops_pcom = {
	.enable = pc_clk_enable,
	.disable = pc_clk_disable,
	.auto_off = pc_clk_disable,
	.reset = pc_clk_reset,
	.set_rate = pc_clk_set_rate,
	.set_min_rate = pc_clk_set_min_rate,
	.set_max_rate = pc_clk_set_max_rate,
	.set_flags = pc_clk_set_flags,
	.get_rate = pc_clk_get_rate,
	.is_enabled = pc_clk_is_enabled,
	.round_rate = pc_clk_round_rate,
	.is_local = pc_clk_is_local,
};
Commit	Line	Data
5e96da5d DW	1	/*
	2	* Copyright (C) 2007 Google, Inc.
	3	* Copyright (c) 2007-2010, Code Aurora Forum. All rights reserved.
	4	*
	5	* This software is licensed under the terms of the GNU General Public
	6	* License version 2, as published by the Free Software Foundation, and
	7	* may be copied, distributed, and modified under those terms.
	8	*
	9	* This program is distributed in the hope that it will be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	* GNU General Public License for more details.
	13	*
	14	*/
	15
	16	#include <linux/err.h>
	17	#include <linux/ctype.h>
	18	#include <linux/stddef.h>
	19	#include <mach/clk.h>
	20
	21	#include "proc_comm.h"
	22	#include "clock.h"
ce1c80fb	23	#include "clock-pcom.h"
5e96da5d DW	24
	25	/*
	26	* glue for the proc_comm interface
	27	*/
56417056	28	static int pc_clk_enable(unsigned id)
5e96da5d DW	29	{
	30	int rc = msm_proc_comm(PCOM_CLKCTL_RPC_ENABLE, &id, NULL);
	31	if (rc < 0)
	32	return rc;
	33	else
	34	return (int)id < 0 ? -EINVAL : 0;
	35	}
	36
56417056	37	static void pc_clk_disable(unsigned id)
5e96da5d DW	38	{
	39	msm_proc_comm(PCOM_CLKCTL_RPC_DISABLE, &id, NULL);
	40	}
	41
	42	int pc_clk_reset(unsigned id, enum clk_reset_action action)
	43	{
	44	int rc;
	45
	46	if (action == CLK_RESET_ASSERT)
	47	rc = msm_proc_comm(PCOM_CLKCTL_RPC_RESET_ASSERT, &id, NULL);
	48	else
	49	rc = msm_proc_comm(PCOM_CLKCTL_RPC_RESET_DEASSERT, &id, NULL);
	50
	51	if (rc < 0)
	52	return rc;
	53	else
	54	return (int)id < 0 ? -EINVAL : 0;
	55	}
	56
56417056	57	static int pc_clk_set_rate(unsigned id, unsigned rate)
5e96da5d DW	58	{
	59	/* The rate _might_ be rounded off to the nearest KHz value by the
	60	* remote function. So a return value of 0 doesn't necessarily mean
	61	* that the exact rate was set successfully.
	62	*/
	63	int rc = msm_proc_comm(PCOM_CLKCTL_RPC_SET_RATE, &id, &rate);
	64	if (rc < 0)
	65	return rc;
	66	else
	67	return (int)id < 0 ? -EINVAL : 0;
	68	}
	69
56417056	70	static int pc_clk_set_min_rate(unsigned id, unsigned rate)
5e96da5d DW	71	{
	72	int rc = msm_proc_comm(PCOM_CLKCTL_RPC_MIN_RATE, &id, &rate);
	73	if (rc < 0)
	74	return rc;
	75	else
	76	return (int)id < 0 ? -EINVAL : 0;
	77	}
	78
56417056	79	static int pc_clk_set_max_rate(unsigned id, unsigned rate)
5e96da5d DW	80	{
	81	int rc = msm_proc_comm(PCOM_CLKCTL_RPC_MAX_RATE, &id, &rate);
	82	if (rc < 0)
	83	return rc;
	84	else
	85	return (int)id < 0 ? -EINVAL : 0;
	86	}
	87
56417056	88	static int pc_clk_set_flags(unsigned id, unsigned flags)
5e96da5d DW	89	{
	90	int rc = msm_proc_comm(PCOM_CLKCTL_RPC_SET_FLAGS, &id, &flags);
	91	if (rc < 0)
	92	return rc;
	93	else
	94	return (int)id < 0 ? -EINVAL : 0;
	95	}
	96
56417056	97	static unsigned pc_clk_get_rate(unsigned id)
5e96da5d DW	98	{
	99	if (msm_proc_comm(PCOM_CLKCTL_RPC_RATE, &id, NULL))
	100	return 0;
	101	else
	102	return id;
	103	}
	104
56417056	105	static unsigned pc_clk_is_enabled(unsigned id)
5e96da5d DW	106	{
	107	if (msm_proc_comm(PCOM_CLKCTL_RPC_ENABLED, &id, NULL))
	108	return 0;
	109	else
	110	return id;
	111	}
	112
56417056	113	static long pc_clk_round_rate(unsigned id, unsigned rate)
5e96da5d DW	114	{
	115
	116	/* Not really supported; pc_clk_set_rate() does rounding on it's own. */
	117	return rate;
	118	}
	119
2a52220c SB	120	static bool pc_clk_is_local(unsigned id)
	121	{
	122	return false;
	123	}
	124
5e96da5d DW	125	struct clk_ops clk_ops_pcom = {
	126	.enable = pc_clk_enable,
	127	.disable = pc_clk_disable,
	128	.auto_off = pc_clk_disable,
	129	.reset = pc_clk_reset,
	130	.set_rate = pc_clk_set_rate,
	131	.set_min_rate = pc_clk_set_min_rate,
	132	.set_max_rate = pc_clk_set_max_rate,
	133	.set_flags = pc_clk_set_flags,
	134	.get_rate = pc_clk_get_rate,
	135	.is_enabled = pc_clk_is_enabled,
	136	.round_rate = pc_clk_round_rate,
2a52220c	137	.is_local = pc_clk_is_local,
5e96da5d	138	};