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>
diff --git a/plat/imx/common/imx_sip_handler.c b/plat/imx/common/imx_sip_handler.c
index a414a44..22a7f2b 100644
--- a/plat/imx/common/imx_sip_handler.c
+++ b/plat/imx/common/imx_sip_handler.c
@@ -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 @@
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;
+}
diff --git a/plat/imx/common/imx_sip_svc.c b/plat/imx/common/imx_sip_svc.c
index 23ff0bb..89b9df8 100644
--- a/plat/imx/common/imx_sip_svc.c
+++ b/plat/imx/common/imx_sip_svc.c
@@ -29,6 +29,9 @@
#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);
diff --git a/plat/imx/common/include/imx_sip_svc.h b/plat/imx/common/include/imx_sip_svc.h
index 0d21f75..4ba7b87 100644
--- a/plat/imx/common/include/imx_sip_svc.h
+++ b/plat/imx/common/include/imx_sip_svc.h
@@ -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