plat/imx/common/cpufreq.c

/*
 * Copyright 2017 NXP
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

#include <debug.h>
#include <stdlib.h>
#include <stdint.h>
#include <std_svc.h>
#include <platform_def.h>
#include <sci/sci.h>
#include <runtime_svc.h>
#include <imx_sip.h>

#ifdef PLAT_IMX8QM
const static int ap_cluster_index[2] = {
	SC_R_A53, SC_R_A72,
};
#endif

static void imx_cpufreq_set_target(uint32_t cluster_id, unsigned long freq)
{
	sc_pm_clock_rate_t rate = (sc_pm_clock_rate_t)freq;

#ifdef PLAT_IMX8QM
	sc_pm_set_clock_rate(ipc_handle, ap_cluster_index[cluster_id], SC_PM_CLK_CPU, &rate);
#endif
#ifdef PLAT_IMX8QX
	sc_pm_set_clock_rate(ipc_handle, SC_R_A35, SC_PM_CLK_CPU, &rate);
#endif
}

int imx_cpufreq_handler(uint32_t smc_fid,
		    u_register_t x1,
		    u_register_t x2,
		    u_register_t x3)
{
	switch(x1) {
	case IMX_SIP_SET_CPUFREQ:
		imx_cpufreq_set_target(x2, x3);
		break;
	default:
		return SMC_UNK;
	}

	return 0;
}