i.mx8qm/i.mx8qxp: add SIP cpu-freq support

Linux kernel will issue cpu-freq scale via SIP, ATF
calls SCFW API to finish the CPU frequency scale.

Move SIP service code from i.mx8mq to common place for
all i.mx SoCs.

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>

6 files changed, 76 insertions, 3 deletions

diff --git a/plat/freescale/common/cpufreq.c b/plat/freescale/common/cpufreq.c
new file mode 100644
index 00000000..75f005dd
--- /dev/null
+++ b/plat/freescale/common/cpufreq.c
@@ -0,0 +1,57 @@
+/*
+ * Copyright 2017 NXP
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <debug.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <smcc_helpers.h>
+#include <std_svc.h>
+#include <types.h>
+#include <platform_def.h>
+#include <fsl_sip.h>
+#include <sci/sci.h>
+
+extern sc_ipc_t ipc_handle;
+
+const static int ap_cluster_index[2] = {
+	SC_R_A53, SC_R_A72,
+};
+
+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_IMX8QXP
+	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 FSL_SIP_SET_CPUFREQ:
+		imx_cpufreq_set_target(x2, x3);
+		break;
+	default:
+		return SMC_UNK;
+	}
+
+	return 0;
+}
diff --git a/plat/freescale/imx8mq/include/fsl_sip.h b/plat/freescale/common/include/fsl_sip.h
index 73fa08d4..52dceb81 100644
--- a/plat/freescale/imx8mq/include/fsl_sip.h
+++ b/plat/freescale/common/include/fsl_sip.h
@@ -21,4 +21,8 @@
 #define FSL_SIP_CONFIG_GPC_SET_WAKE	0x02
 #define FSL_SIP_CONFIG_GPC_PM_DOMAIN	0x03
 
+#define FSL_SIP_CPUFREQ			0xC2000001
+#define FSL_SIP_SET_CPUFREQ		0x00
+
+
 #endif
diff --git a/plat/freescale/imx8mq/sip_svc.c b/plat/freescale/common/sip_svc.c
index 0bf9cd3e..d8c1c5bf 100644
--- a/plat/freescale/imx8mq/sip_svc.c
+++ b/plat/freescale/common/sip_svc.c
@@ -38,6 +38,7 @@
 #include <uuid.h>
 
 extern int imx_gpc_handler(uint32_t  smc_fid, u_register_t x1, u_register_t x2, u_register_t x3);
+extern int imx_cpufreq_handler(uint32_t  smc_fid, u_register_t x1, u_register_t x2, u_register_t x3);
 
 /* Setup i.MX platform specific services Services */
 static int32_t plat_svc_setup(void)
@@ -51,7 +52,7 @@ static int32_t plat_svc_setup(void)
 uintptr_t imx_svc_smc_handler(uint32_t smc_fid,
 			      u_register_t x1,
 			      u_register_t x2,
-			      u_register_t x3, 
+			      u_register_t x3,
 			      u_register_t x4,
 			      void *cookie,
 			      void *handle,
@@ -59,11 +60,18 @@ uintptr_t imx_svc_smc_handler(uint32_t smc_fid,
 {
 	NOTICE("smc_fid is %x\n", smc_fid);
 	switch (smc_fid) {
+#ifdef PLAT_IMX8M
 	case  FSL_SIP_GPC:
 		SMC_RET1(handle, imx_gpc_handler(smc_fid, x1, x2, x3));
 		break;
+#endif
+#if (defined(PLAT_IMX8QM) || defined(PLAT_IMX8QXP))
+	case  FSL_SIP_CPUFREQ:
+		SMC_RET1(handle, imx_cpufreq_handler(smc_fid, x1, x2, x3));
+		break;
+#endif
 	default:
-		WARN("Uimplemented SIP Service Call: 0x%x \n", smc_fid); 
+		WARN("Unimplemented SIP Service Call: 0x%x \n", smc_fid);
 		SMC_RET1(handle, SMC_UNK);
 		break;
 	}
diff --git a/plat/freescale/imx8mq/platform.mk b/plat/freescale/imx8mq/platform.mk
index 424ccc83..b7c4b866 100644
--- a/plat/freescale/imx8mq/platform.mk
+++ b/plat/freescale/imx8mq/platform.mk
@@ -9,10 +9,10 @@ PLAT_GIC_SOURCES	:=	drivers/arm/gic/v3/gicv3_helpers.c	\
 
 BL31_SOURCES		+=	plat/freescale/common/imx8_helpers.S		\
 				plat/freescale/common/mxcuart_console.S		\
+				plat/freescale/common/sip_svc.c			\
 				plat/freescale/imx8mq/imx8m_bl31_setup.c	\
 				plat/freescale/imx8mq/gpc.c			\
 				plat/freescale/imx8mq/imx8m_psci.c		\
-				plat/freescale/imx8mq/sip_svc.c			\
 				plat/freescale/common/imx8_topology.c		\
 				plat/common/plat_psci_common.c			\
 				lib/xlat_tables/aarch64/xlat_tables.c		\
diff --git a/plat/freescale/imx8qm/platform.mk b/plat/freescale/imx8qm/platform.mk
index c516c8df..8abc978d 100644
--- a/plat/freescale/imx8qm/platform.mk
+++ b/plat/freescale/imx8qm/platform.mk
@@ -40,6 +40,8 @@ PLAT_GIC_SOURCES	:=	drivers/arm/gic/v3/gicv3_helpers.c	\
 
 BL31_SOURCES		+=	plat/freescale/common/lpuart_console.S		\
 				plat/freescale/common/imx8_helpers.S		\
+				plat/freescale/common/sip_svc.c			\
+				plat/freescale/common/cpufreq.c			\
 				plat/freescale/imx8qm/imx8qm_bl31_setup.c	\
 				plat/freescale/imx8qm/imx8qm_psci.c		\
 				plat/freescale/common/imx8_topology.c		\
diff --git a/plat/freescale/imx8qxp/platform.mk b/plat/freescale/imx8qxp/platform.mk
index 50b695ef..9be92464 100644
--- a/plat/freescale/imx8qxp/platform.mk
+++ b/plat/freescale/imx8qxp/platform.mk
@@ -40,6 +40,8 @@ PLAT_GIC_SOURCES	:=	drivers/arm/gic/v3/gicv3_helpers.c	\
 
 BL31_SOURCES		+=	plat/freescale/common/lpuart_console.S		\
 				plat/freescale/common/imx8_helpers.S		\
+				plat/freescale/common/sip_svc.c			\
+				plat/freescale/common/cpufreq.c			\
 				plat/freescale/imx8qxp/imx8qxp_bl31_setup.c	\
 				plat/freescale/imx8qxp/imx8qxp_psci.c		\
 				plat/freescale/common/imx8_topology.c		\