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2a52220c89
Not all devices use proc_comm and determining if a clock is local vs. remote is fragile when done by comparing clk_ops pointers. Instead, implement an is_local() function for all clk_ops to determine if the clock is local. Doing this allows us to remove the last references to clk_ops_pcom from clock.c and compile it for targets with CONFIG_MSM_PROC_COMM=n. We don't need to set the clk_ops at runtime until 7x30 local clock detection comes in. Right now it's just complicating things so just set the ops pointer statically. Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: David Brown <davidb@codeaurora.org>
139 lines
3.1 KiB
C
139 lines
3.1 KiB
C
/*
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* Copyright (C) 2007 Google, Inc.
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* Copyright (c) 2007-2010, Code Aurora Forum. All rights reserved.
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <linux/err.h>
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#include <linux/ctype.h>
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#include <linux/stddef.h>
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#include <mach/clk.h>
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#include "proc_comm.h"
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#include "clock.h"
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#include "clock-pcom.h"
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/*
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* glue for the proc_comm interface
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*/
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int pc_clk_enable(unsigned id)
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{
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int rc = msm_proc_comm(PCOM_CLKCTL_RPC_ENABLE, &id, NULL);
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if (rc < 0)
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return rc;
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else
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return (int)id < 0 ? -EINVAL : 0;
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}
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void pc_clk_disable(unsigned id)
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{
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msm_proc_comm(PCOM_CLKCTL_RPC_DISABLE, &id, NULL);
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}
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int pc_clk_reset(unsigned id, enum clk_reset_action action)
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{
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int rc;
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if (action == CLK_RESET_ASSERT)
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rc = msm_proc_comm(PCOM_CLKCTL_RPC_RESET_ASSERT, &id, NULL);
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else
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rc = msm_proc_comm(PCOM_CLKCTL_RPC_RESET_DEASSERT, &id, NULL);
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if (rc < 0)
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return rc;
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else
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return (int)id < 0 ? -EINVAL : 0;
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}
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int pc_clk_set_rate(unsigned id, unsigned rate)
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{
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/* The rate _might_ be rounded off to the nearest KHz value by the
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* remote function. So a return value of 0 doesn't necessarily mean
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* that the exact rate was set successfully.
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*/
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int rc = msm_proc_comm(PCOM_CLKCTL_RPC_SET_RATE, &id, &rate);
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if (rc < 0)
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return rc;
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else
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return (int)id < 0 ? -EINVAL : 0;
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}
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int pc_clk_set_min_rate(unsigned id, unsigned rate)
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{
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int rc = msm_proc_comm(PCOM_CLKCTL_RPC_MIN_RATE, &id, &rate);
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if (rc < 0)
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return rc;
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else
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return (int)id < 0 ? -EINVAL : 0;
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}
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int pc_clk_set_max_rate(unsigned id, unsigned rate)
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{
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int rc = msm_proc_comm(PCOM_CLKCTL_RPC_MAX_RATE, &id, &rate);
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if (rc < 0)
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return rc;
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else
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return (int)id < 0 ? -EINVAL : 0;
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}
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int pc_clk_set_flags(unsigned id, unsigned flags)
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{
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int rc = msm_proc_comm(PCOM_CLKCTL_RPC_SET_FLAGS, &id, &flags);
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if (rc < 0)
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return rc;
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else
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return (int)id < 0 ? -EINVAL : 0;
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}
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unsigned pc_clk_get_rate(unsigned id)
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{
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if (msm_proc_comm(PCOM_CLKCTL_RPC_RATE, &id, NULL))
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return 0;
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else
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return id;
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}
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unsigned pc_clk_is_enabled(unsigned id)
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{
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if (msm_proc_comm(PCOM_CLKCTL_RPC_ENABLED, &id, NULL))
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return 0;
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else
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return id;
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}
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long pc_clk_round_rate(unsigned id, unsigned rate)
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{
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/* Not really supported; pc_clk_set_rate() does rounding on it's own. */
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return rate;
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}
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static bool pc_clk_is_local(unsigned id)
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{
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return false;
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}
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struct clk_ops clk_ops_pcom = {
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.enable = pc_clk_enable,
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.disable = pc_clk_disable,
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.auto_off = pc_clk_disable,
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.reset = pc_clk_reset,
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.set_rate = pc_clk_set_rate,
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.set_min_rate = pc_clk_set_min_rate,
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.set_max_rate = pc_clk_set_max_rate,
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.set_flags = pc_clk_set_flags,
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.get_rate = pc_clk_get_rate,
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.is_enabled = pc_clk_is_enabled,
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.round_rate = pc_clk_round_rate,
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.is_local = pc_clk_is_local,
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};
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