[PATCH 5/7] firmware: xlnx-zynqmp: Add shutdown/wakeup request

Wendy Liang
2018-08-16T07:06:28Z

Add shutdown/wakeup a resource eemi operations to shutdown
or bringup a resource.

Signed-off-by: Wendy Liang <jliang@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 2e97f60..aa83262 100644
--- a/drivers/firmware/xilinx/zynqmp.c
+++ b/drivers/firmware/xilinx/zynqmp.c
@@ -475,6 +475,39 @@ static int zynqmp_pm_release_node(const u32 node)
return zynqmp_pm_invoke_fn(PM_RELEASE_NODE, node, 0, 0, 0, NULL);
}

+/**
+ * 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);
+}
+
static const struct zynqmp_eemi_ops eemi_ops = {
.get_api_version = zynqmp_pm_get_api_version,
.ioctl = zynqmp_pm_ioctl,
@@ -490,6 +523,8 @@ static const struct zynqmp_eemi_ops eemi_ops = {
.clock_getparent = zynqmp_pm_clock_getparent,
.request_node = zynqmp_pm_request_node,
.release_node = zynqmp_pm_release_node,
+ .force_powerdown = zynqmp_pm_force_powerdown,
+ .request_wakeup = zynqmp_pm_request_wakeup,
};

/**
diff --git a/include/linux/firmware/xlnx-zynqmp.h b/include/linux/firmware/xlnx-zynqmp.h
index 02067a3..efc73bc 100644
--- a/include/linux/firmware/xlnx-zynqmp.h
+++ b/include/linux/firmware/xlnx-zynqmp.h
@@ -54,6 +54,8 @@ enum pm_api_id {
PM_CLOCK_GETRATE,
PM_CLOCK_SETPARENT,
PM_CLOCK_GETPARENT,
+ PM_FORCE_POWERDOWN = 8,
+ PM_REQUEST_WAKEUP = 10,
PM_REQUEST_NODE = 13,
PM_RELEASE_NODE = 14,
};
@@ -137,6 +139,12 @@ 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);
};

#if IS_REACHABLE(CONFIG_ARCH_ZYNQMP)
--
2.7.4