[PATCH 4/7] firmware: xlnx-zynqmp: Add request/release node

Wendy Liang
2018-08-16T07:06:27Z

Add request/release resource node EEMI operations.

Signed-off-by: Wendy Liang <jliang@xilinx.com>
---
drivers/firmware/xilinx/zynqmp.c | 30 ++++++++++++++++++++++++++++++
include/linux/firmware/xlnx-zynqmp.h | 7 +++++++
2 files changed, 37 insertions(+)

diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/xilinx/zynqmp.c
index ce6c746..2e97f60 100644
--- a/drivers/firmware/xilinx/zynqmp.c
+++ b/drivers/firmware/xilinx/zynqmp.c
@@ -447,6 +447,34 @@ static int zynqmp_pm_clock_getparent(u32 clock_id, u32 *parent_id)
return ret;
}

+/**
+ * zynqmp_pm_request_node - PM call to 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
+ *
+ * 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 - PM call to release a node
+ * @node: Node ID of the slave
+ *
+ * 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);
+}
+
static const struct zynqmp_eemi_ops eemi_ops = {
.get_api_version = zynqmp_pm_get_api_version,
.ioctl = zynqmp_pm_ioctl,
@@ -460,6 +488,8 @@ static const struct zynqmp_eemi_ops eemi_ops = {
.clock_getrate = zynqmp_pm_clock_getrate,
.clock_setparent = zynqmp_pm_clock_setparent,
.clock_getparent = zynqmp_pm_clock_getparent,
+ .request_node = zynqmp_pm_request_node,
+ .release_node = zynqmp_pm_release_node,
};

/**
diff --git a/include/linux/firmware/xlnx-zynqmp.h b/include/linux/firmware/xlnx-zynqmp.h
index 83ebadf..02067a3 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_REQUEST_NODE = 13,
+ PM_RELEASE_NODE = 14,
};

/* PMU-FW return status codes */
@@ -130,6 +132,11 @@ struct zynqmp_eemi_ops {
int (*clock_getrate)(u32 clock_id, u64 *rate);
int (*clock_setparent)(u32 clock_id, u32 parent_id);
int (*clock_getparent)(u32 clock_id, u32 *parent_id);
+ 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);
};

#if IS_REACHABLE(CONFIG_ARCH_ZYNQMP)
--
2.7.4