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

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Date:   Thu, 16 Aug 2018 00:06:27 -0700
From:   Wendy Liang <wendy.liang@...inx.com>
To:     <ohad@...ery.com>, <bjorn.andersson@...aro.org>,
        <michal.simek@...inx.com>, <robh+dt@...nel.org>,
        <mark.rutland@....com>, <rajan.vaja@...inx.com>,
        <jollys@...inx.com>
CC:     <linux-remoteproc@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Wendy Liang <jliang@...inx.com>
Subject: [PATCH 4/7] firmware: xlnx-zynqmp: Add request/release node

Add request/release resource node EEMI operations.

Signed-off-by: Wendy Liang <jliang@...inx.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