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Subject[PATCH 2/5] firmware: xilinx: Add shutdown/wakeup APIs
Date
Add shutdown/wakeup a resource eemi operations to shutdown
or bringup a resource.

Signed-off-by: Ben Levinsky <ben.levinsky@xilinx.com>
---
drivers/firmware/xilinx/zynqmp.c | 35 +++++++++++++++++++++++++++++++++++
include/linux/firmware/xlnx-zynqmp.h | 8 ++++++++
2 files changed, 43 insertions(+)

diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/xilinx/zynqmp.c
index 20e4574..486dcb1 100644
--- a/drivers/firmware/xilinx/zynqmp.c
+++ b/drivers/firmware/xilinx/zynqmp.c
@@ -692,6 +692,39 @@ static int zynqmp_pm_release_node(const u32 node)
}

/**
+ * zynqmp_pm_force_powerdown - PM call to request for another PU or subsystem to
+ * be powered down forcefully
+ * @target: Node ID of the targeted PU or subsystem
+ * @ack: Flag to specify whether acknowledge is requested
+ *
+ * Return: Returns status, either success or error+reason
+ */
+static int zynqmp_pm_force_powerdown(const u32 target,
+ const enum zynqmp_pm_request_ack ack)
+{
+ return zynqmp_pm_invoke_fn(PM_FORCE_POWERDOWN, target, ack, 0, 0, NULL);
+}
+
+/**
+ * zynqmp_pm_request_wakeup - PM call to wake up selected master or subsystem
+ * @node: Node ID of the master or subsystem
+ * @set_addr: Specifies whether the address argument is relevant
+ * @address: Address from which to resume when woken up
+ * @ack: Flag to specify whether acknowledge requested
+ *
+ * Return: Returns status, either success or error+reason
+ */
+static int zynqmp_pm_request_wakeup(const u32 node,
+ const bool set_addr,
+ const u64 address,
+ const enum zynqmp_pm_request_ack ack)
+{
+ /* set_addr flag is encoded into 1st bit of address */
+ return zynqmp_pm_invoke_fn(PM_REQUEST_WAKEUP, node, address | set_addr,
+ address >> 32, ack, 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
@@ -731,6 +764,8 @@ static const struct zynqmp_eemi_ops eemi_ops = {
.set_suspend_mode = zynqmp_pm_set_suspend_mode,
.request_node = zynqmp_pm_request_node,
.release_node = zynqmp_pm_release_node,
+ .force_powerdown = zynqmp_pm_force_powerdown,
+ .request_wakeup = zynqmp_pm_request_wakeup,
.set_requirement = zynqmp_pm_set_requirement,
.fpga_load = zynqmp_pm_fpga_load,
.fpga_get_status = zynqmp_pm_fpga_get_status,
diff --git a/include/linux/firmware/xlnx-zynqmp.h b/include/linux/firmware/xlnx-zynqmp.h
index b8ca118..0a68849 100644
--- a/include/linux/firmware/xlnx-zynqmp.h
+++ b/include/linux/firmware/xlnx-zynqmp.h
@@ -82,6 +82,8 @@ enum pm_api_id {
PM_CLOCK_GETRATE,
PM_CLOCK_SETPARENT,
PM_CLOCK_GETPARENT,
+ PM_FORCE_POWERDOWN = 8,
+ PM_REQUEST_WAKEUP = 10,
PM_FEATURE_CHECK = 63,
PM_API_MAX,
};
@@ -330,6 +332,12 @@ struct zynqmp_eemi_ops {
const u32 qos,
const enum zynqmp_pm_request_ack ack);
int (*release_node)(const u32 node);
+ int (*force_powerdown)(const u32 target,
+ const enum zynqmp_pm_request_ack ack);
+ int (*request_wakeup)(const u32 node,
+ const bool set_addr,
+ const u64 address,
+ const enum zynqmp_pm_request_ack ack);
int (*set_requirement)(const u32 node,
const u32 capabilities,
const u32 qos,
--
2.7.4
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