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firmware: xilinx: Add APIs to control node status/power 

Add Xilinx ZynqMP firmware APIs to control node status
and power. These APIs allows turning on/off power domain
and setting capabilities of devices present in power domain.

Signed-off-by: Rajan Vaja <rajan.vaja@xilinx.com>
Signed-off-by: Jolly Shah <jolly.shah@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
hifive-unleashed-5.1
Rajan Vaja 2019-02-01 14:08:49 -08:00 committed by Michal Simek
parent 8fd27fb4cf
commit c1986ac3d4
2 changed files with 84 additions and 0 deletions
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58
drivers/firmware/xilinx/zynqmp.c
View File

@ -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,
};
/**

26
include/linux/firmware/xlnx-zynqmp.h
View File

@ -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,