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/*
* 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 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,
.get_rate = pc_clk_get_rate,
.is_enabled = pc_clk_is_enabled,
.round_rate = pc_clk_round_rate,
.is_local = pc_clk_is_local,
};
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