plat: versal: Add Get_ChipID API

Add support for Get_ChipID API in Versal which calls corresponding
LibPM API.

Signed-off-by: Ravi Patel <ravi.patel@xilinx.com>
Acked-by: Jolly Shah <jolly.shah@xilinx.com>
Signed-off-by: Jolly Shah <jolly.shah@xilinx.com>
Change-Id: I25c4b301721d7989d982ac376c59195c55564022

plat/xilinx/versal/pm_service/pm_api_sys.c

@@ -748,6 +748,23 @@ enum pm_ret_status pm_set_wakeup_source(uint32_t target, uint32_t wkup_device,
 	return pm_ipi_send(primary_proc, payload);
 }
 
+/**
+ * pm_get_chipid() - Read silicon ID registers
+ * @value       Buffer for return values. Must be large enough
+ *		to hold 8 bytes.
+ *
+ * @return      Returns silicon ID registers
+ */
+enum pm_ret_status pm_get_chipid(uint32_t *value)
+{
+	uint32_t payload[PAYLOAD_ARG_CNT];
+
+	/* Send request to the PMC */
+	PM_PACK_PAYLOAD1(payload, LIBPM_MODULE_ID, PM_GET_CHIPID);
+
+	return pm_ipi_send_sync(primary_proc, payload, value, 2);
+}
+
 /**
  * pm_feature_check() - Returns the supported API version if supported
  * @api_id	API ID to check

plat/xilinx/versal/pm_service/pm_api_sys.h

@@ -65,6 +65,7 @@ enum pm_ret_status pm_api_ioctl(uint32_t device_id, uint32_t ioctl_id,
 enum pm_ret_status pm_query_data(uint32_t qid, uint32_t arg1, uint32_t arg2,
 				 uint32_t arg3, uint32_t *data);
 unsigned int pm_get_shutdown_scope(void);
+enum pm_ret_status pm_get_chipid(uint32_t *value);
 enum pm_ret_status pm_feature_check(uint32_t api_id, unsigned int *version);
 enum pm_ret_status pm_load_pdi(uint32_t src, uint32_t address_low,
 			       uint32_t address_high);

plat/xilinx/versal/pm_service/pm_defs.h

@@ -55,6 +55,7 @@
 #define PM_RESET_ASSERT			17U
 #define PM_RESET_GET_STATUS		18U
 #define PM_INIT_FINALIZE		21U
+#define PM_GET_CHIPID			24U
 #define	PM_PINCTRL_REQUEST		28U
 #define	PM_PINCTRL_RELEASE		29U
 #define	PM_PINCTRL_GET_FUNCTION		30U

plat/xilinx/versal/pm_service/pm_svc_main.c

@@ -290,6 +290,15 @@ uint64_t pm_smc_handler(uint32_t smc_fid, uint64_t x1, uint64_t x2, uint64_t x3,
 		SMC_RET1(handle, (uint64_t)PM_RET_SUCCESS |
 			 ((uint64_t)VERSAL_TZ_VERSION << 32));
 
+	case PM_GET_CHIPID:
+	{
+		uint32_t result[2];
+
+		ret = pm_get_chipid(result);
+		SMC_RET2(handle, (uint64_t)ret | ((uint64_t)result[0] << 32),
+			 result[1]);
+	}
+
 	case PM_FEATURE_CHECK:
 	{
 		uint32_t version;