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imx: add cpu-freq SIP runtime service support 

On i.MX8QM/i.MX8QX with system controller inside, the CPU's clock
rate is managed by SCFW(system controller firmware) and can ONLY be
changed from secure world, so SIP runtime service is needed for
setting CPU's clock rate, this patch adds cpu-freq SIP runtime service
support.

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
This commit is contained in:
Anson Huang 2019-01-15 10:56:36 +08:00
parent 025514ba80
commit d3996c590d
3 changed files with 42 additions and 0 deletions
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34
plat/imx/common/imx_sip_handler.c
View File

@ -13,6 +13,12 @@
#include <imx_sip_svc.h>
#include <sci/sci.h>
#ifdef PLAT_IMX8QM
const static int ap_cluster_index[PLATFORM_CLUSTER_COUNT] = {
SC_R_A53, SC_R_A72,
};
#endif
static int imx_srtc_set_time(uint32_t year_mon,
unsigned long day_hour,
unsigned long min_sec)
@ -42,3 +48,31 @@ int imx_srtc_handler(uint32_t smc_fid,
SMC_RET1(handle, ret);
}
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;
}

3
plat/imx/common/imx_sip_svc.c
View File

@ -29,6 +29,9 @@ static uintptr_t imx_sip_handler(unsigned int smc_fid,
#if (defined(PLAT_IMX8QM) || defined(PLAT_IMX8QX))
case IMX_SIP_SRTC:
return imx_srtc_handler(smc_fid, handle, x1, x2, x3, x4);
case IMX_SIP_CPUFREQ:
SMC_RET1(handle, imx_cpufreq_handler(smc_fid, x1, x2, x3));
break;
#endif
default:
WARN("Unimplemented i.MX SiP Service Call: 0x%x\n", smc_fid);

5
plat/imx/common/include/imx_sip_svc.h
View File

@ -8,10 +8,15 @@
#define __IMX_SIP_SVC_H__
/* SMC function IDs for SiP Service queries */
#define IMX_SIP_CPUFREQ 0xC2000001
#define IMX_SIP_SET_CPUFREQ 0x00
#define IMX_SIP_SRTC 0xC2000002
#define IMX_SIP_SRTC_SET_TIME 0x00
#if (defined(PLAT_IMX8QM) || defined(PLAT_IMX8QX))
int imx_cpufreq_handler(uint32_t smc_fid, u_register_t x1,
u_register_t x2, u_register_t x3);
int imx_srtc_handler(uint32_t smc_fid, void *handle, u_register_t x1,
u_register_t x2, u_register_t x3, u_register_t x4);
#endif