zynqmp: pm: Implement PLL set parameter EEMI API
This API will be used to set a parameter for the PLL. The parameter
value that is set will have effect once the PLL mode is set to integer
or fractional mode. Parameter values represent the values as defined
in the Zynq MPSoC register reference manual ug1087.
Signed-off-by: Mirela Simonovic <mirela.simonovic@aggios.com>
Acked-by: Will Wong <WILLW@xilinx.com>
Signed-off-by: Jolly Shah <jollys@xilinx.com>
diff --git a/plat/xilinx/zynqmp/pm_service/pm_api_sys.c b/plat/xilinx/zynqmp/pm_service/pm_api_sys.c
index e85b2ce..9bc11f2 100644
--- a/plat/xilinx/zynqmp/pm_service/pm_api_sys.c
+++ b/plat/xilinx/zynqmp/pm_service/pm_api_sys.c
@@ -1237,3 +1237,34 @@
address_high, readback_type);
return pm_ipi_send_sync(primary_proc, payload, value, 1);
}
+
+/*
+ * pm_pll_set_parameter() - Set the PLL parameter value
+ * @nid Node id of the target PLL
+ * @param_id ID of the PLL parameter
+ * @value Parameter value to be set
+ *
+ * Setting the parameter will have physical effect once the PLL mode is set to
+ * integer or fractional.
+ *
+ * @return Error if an argument is not valid or status as returned by the
+ * PM controller (PMU)
+ */
+enum pm_ret_status pm_pll_set_parameter(enum pm_node_id nid,
+ enum pm_pll_param param_id,
+ unsigned int value)
+{
+ uint32_t payload[PAYLOAD_ARG_CNT];
+
+ /* Check if given node ID is a PLL node */
+ if (nid < NODE_APLL || nid > NODE_IOPLL)
+ return PM_RET_ERROR_ARGS;
+
+ /* Check if parameter ID is valid and return an error if it's not */
+ if (param_id >= PM_PLL_PARAM_MAX)
+ return PM_RET_ERROR_ARGS;
+
+ /* Send request to the PMU */
+ PM_PACK_PAYLOAD4(payload, PM_PLL_SET_PARAMETER, nid, param_id, value);
+ return pm_ipi_send_sync(primary_proc, payload, NULL, 0);
+}