firmware: xilinx: Add APIs to control node status/power (c1986ac3) · Commits · 戴 / test

drivers/firmware/xilinx/zynqmp.c

+58 −0

Original line number	Diff line number	Diff line
		@@ -557,6 +557,61 @@ static int zynqmp_pm_set_suspend_mode(u32 mode)
		return zynqmp_pm_invoke_fn(PM_SET_SUSPEND_MODE, mode, 0, 0, 0, NULL);
		}

		/**
		* zynqmp_pm_request_node() - Request a node with specific capabilities
		* @node: Node ID of the slave
		* @capabilities: Requested capabilities of the slave
		* @qos: Quality of service (not supported)
		* @ack: Flag to specify whether acknowledge is requested
		*
		* This function is used by master to request particular node from firmware.
		* Every master must request node before using it.
		*
		* Return: Returns status, either success or error+reason
		*/
		static int zynqmp_pm_request_node(const u32 node, const u32 capabilities,
		const u32 qos,
		const enum zynqmp_pm_request_ack ack)
		{
		return zynqmp_pm_invoke_fn(PM_REQUEST_NODE, node, capabilities,
		qos, ack, NULL);
		}

		/**
		* zynqmp_pm_release_node() - Release a node
		* @node: Node ID of the slave
		*
		* This function is used by master to inform firmware that master
		* has released node. Once released, master must not use that node
		* without re-request.
		*
		* Return: Returns status, either success or error+reason
		*/
		static int zynqmp_pm_release_node(const u32 node)
		{
		return zynqmp_pm_invoke_fn(PM_RELEASE_NODE, node, 0, 0, 0, NULL);
		}

		/**
		* zynqmp_pm_set_requirement() - PM call to set requirement for PM slaves
		* @node: Node ID of the slave
		* @capabilities: Requested capabilities of the slave
		* @qos: Quality of service (not supported)
		* @ack: Flag to specify whether acknowledge is requested
		*
		* This API function is to be used for slaves a PU already has requested
		* to change its capabilities.
		*
		* Return: Returns status, either success or error+reason
		*/
		static int zynqmp_pm_set_requirement(const u32 node, const u32 capabilities,
		const u32 qos,
		const enum zynqmp_pm_request_ack ack)
		{
		return zynqmp_pm_invoke_fn(PM_SET_REQUIREMENT, node, capabilities,
		qos, ack, NULL);
		}

		static const struct zynqmp_eemi_ops eemi_ops = {
		.get_api_version = zynqmp_pm_get_api_version,
		.get_chipid = zynqmp_pm_get_chipid,
		@@ -575,6 +630,9 @@ static const struct zynqmp_eemi_ops eemi_ops = {
		.reset_get_status = zynqmp_pm_reset_get_status,
		.init_finalize = zynqmp_pm_init_finalize,
		.set_suspend_mode = zynqmp_pm_set_suspend_mode,
		.request_node = zynqmp_pm_request_node,
		.release_node = zynqmp_pm_release_node,
		.set_requirement = zynqmp_pm_set_requirement,
		};

		/**

include/linux/firmware/xlnx-zynqmp.h

+26 −0

Original line number	Diff line number	Diff line
		@@ -40,8 +40,19 @@
		/* Payload size (consists of callback API ID + arguments) */
		#define CB_PAYLOAD_SIZE (CB_ARG_CNT + 1)

		#define ZYNQMP_PM_MAX_QOS 100U

		/* Node capabilities */
		#define ZYNQMP_PM_CAPABILITY_ACCESS 0x1U
		#define ZYNQMP_PM_CAPABILITY_CONTEXT 0x2U
		#define ZYNQMP_PM_CAPABILITY_WAKEUP 0x4U
		#define ZYNQMP_PM_CAPABILITY_POWER 0x8U

		enum pm_api_id {
		PM_GET_API_VERSION = 1,
		PM_REQUEST_NODE = 13,
		PM_RELEASE_NODE,
		PM_SET_REQUIREMENT,
		PM_RESET_ASSERT = 17,
		PM_RESET_GET_STATUS,
		PM_PM_INIT_FINALIZE = 21,
		@@ -224,6 +235,12 @@ enum zynqmp_pm_suspend_reason {
		SUSPEND_SYSTEM_SHUTDOWN,
		};

		enum zynqmp_pm_request_ack {
		ZYNQMP_PM_REQUEST_ACK_NO = 1,
		ZYNQMP_PM_REQUEST_ACK_BLOCKING,
		ZYNQMP_PM_REQUEST_ACK_NON_BLOCKING,
		};

		/**
		* struct zynqmp_pm_query_data - PM query data
		* @qid: query ID
		@@ -257,6 +274,15 @@ struct zynqmp_eemi_ops {
		int (reset_get_status)(const enum zynqmp_pm_reset reset, u32 status);
		int (*init_finalize)(void);
		int (*set_suspend_mode)(u32 mode);
		int (*request_node)(const u32 node,
		const u32 capabilities,
		const u32 qos,
		const enum zynqmp_pm_request_ack ack);
		int (*release_node)(const u32 node);
		int (*set_requirement)(const u32 node,
		const u32 capabilities,
		const u32 qos,
		const enum zynqmp_pm_request_ack ack);
		};

		int zynqmp_pm_invoke_fn(u32 pm_api_id, u32 arg0, u32 arg1,

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