56 lines
1.8 KiB
C
Executable File
56 lines
1.8 KiB
C
Executable File
/*
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* drivers/arisc/interfaces/arisc_dvfs.c
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*
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* Copyright (c) 2012 Allwinner.
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* 2012-05-01 Written by sunny (sunny@allwinnertech.com).
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* 2012-10-01 Written by superm (superm@allwinnertech.com).
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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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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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "../arisc_i.h"
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/*
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* set specific pll target frequency.
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* @freq: target frequency to be set, based on KHZ;
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* @pll: which pll will be set
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* @mode: the attribute of message, whether syn or asyn;
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* @cb: callback handler;
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* @cb_arg: callback handler arguments;
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*
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* return: result, 0 - set frequency successed,
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* !0 - set frequency failed;
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*/
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int arisc_dvfs_set_cpufreq(unsigned int freq, unsigned int pll, unsigned int mode, arisc_cb_t cb, void *cb_arg)
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{
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int ret = 0;
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ARISC_INF("arisc dvfs request : %d\n", freq);
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ret = invoke_scp_fn_smc(ARM_SVC_ARISC_CPUX_DVFS_REQ, (u64)freq, (u64)pll, (u64)mode);
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if (ret) {
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if (cb == NULL) {
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ARISC_WRN("callback not install\n");
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} else {
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/* call callback function */
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ARISC_WRN("call the callback function\n");
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(*(cb))(cb_arg);
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}
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}
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return ret;
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}
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EXPORT_SYMBOL(arisc_dvfs_set_cpufreq);
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