zynqmp: pm: Implement PLL get parameter EEMI API
This API will be used to get a parameter for the PLL. 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>
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@ -1268,3 +1268,31 @@ enum pm_ret_status pm_pll_set_parameter(enum pm_node_id nid,
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PM_PACK_PAYLOAD4(payload, PM_PLL_SET_PARAMETER, nid, param_id, value);
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return pm_ipi_send_sync(primary_proc, payload, NULL, 0);
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}
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/**
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* pm_pll_get_parameter() - Get the PLL parameter value
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* @nid Node id of the target PLL
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* @param_id ID of the PLL parameter
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* @value Location to store the parameter value
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*
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* @return Error if an argument is not valid or status as returned by the
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* PM controller (PMU)
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*/
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enum pm_ret_status pm_pll_get_parameter(enum pm_node_id nid,
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enum pm_pll_param param_id,
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unsigned int *value)
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{
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uint32_t payload[PAYLOAD_ARG_CNT];
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/* Check if given node ID is a PLL node */
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if (nid < NODE_APLL || nid > NODE_IOPLL)
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return PM_RET_ERROR_ARGS;
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/* Check if parameter ID is valid and return an error if it's not */
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if (param_id >= PM_PLL_PARAM_MAX)
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return PM_RET_ERROR_ARGS;
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/* Send request to the PMU */
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PM_PACK_PAYLOAD3(payload, PM_PLL_GET_PARAMETER, nid, param_id);
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return pm_ipi_send_sync(primary_proc, payload, value, 1);
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}
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@ -180,4 +180,8 @@ enum pm_ret_status pm_pll_set_parameter(enum pm_node_id nid,
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enum pm_pll_param param_id,
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unsigned int value);
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enum pm_ret_status pm_pll_get_parameter(enum pm_node_id nid,
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enum pm_pll_param param_id,
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unsigned int *value);
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#endif /* PM_API_SYS_H */
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@ -94,6 +94,7 @@ enum pm_api_id {
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PM_SECURE_AES,
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/* PLL control API functions */
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PM_PLL_SET_PARAMETER,
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PM_PLL_GET_PARAMETER,
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PM_API_MAX
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};
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@ -567,6 +567,14 @@ uint64_t pm_smc_handler(uint32_t smc_fid, uint64_t x1, uint64_t x2, uint64_t x3,
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ret = pm_pll_set_parameter(pm_arg[0], pm_arg[1], pm_arg[2]);
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SMC_RET1(handle, (uint64_t)ret);
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case PM_PLL_GET_PARAMETER:
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{
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uint32_t value;
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ret = pm_pll_get_parameter(pm_arg[0], pm_arg[1], &value);
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SMC_RET1(handle, (uint64_t)ret | ((uint64_t)value << 32));
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}
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default:
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WARN("Unimplemented PM Service Call: 0x%x\n", smc_fid);
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SMC_RET1(handle, SMC_UNK);
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