linux-kernel - [PATCH v7 04/10] firmware: xilinx: Add query data API

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Date:   Wed, 30 May 2018 13:55:19 -0700
From:   Jolly Shah <jolly.shah@...inx.com>
To:     <ard.biesheuvel@...aro.org>, <mingo@...nel.org>,
        <gregkh@...uxfoundation.org>, <matt@...eblueprint.co.uk>,
        <sudeep.holla@....com>, <hkallweit1@...il.com>,
        <keescook@...omium.org>, <dmitry.torokhov@...il.com>,
        <mturquette@...libre.com>, <sboyd@...eaurora.org>,
        <michal.simek@...inx.com>, <robh+dt@...nel.org>,
        <mark.rutland@....com>, <linux-clk@...r.kernel.org>
CC:     <rajanv@...inx.com>, <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
        Jolly Shah <jollys@...inx.com>
Subject: [PATCH v7 04/10] firmware: xilinx: Add query data API

From: Rajan Vaja <rajanv@...inx.com>

Add ZynqMP firmware query data API to query platform
specific information(clocks, pins) from firmware.

Signed-off-by: Rajan Vaja <rajanv@...inx.com>
Signed-off-by: Jolly Shah <jollys@...inx.com>
---
 drivers/firmware/xilinx/zynqmp.c     | 14 ++++++++++++++
 include/linux/firmware/xlnx-zynqmp.h | 20 ++++++++++++++++++++
 2 files changed, 34 insertions(+)

diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/xilinx/zynqmp.c
index 34c5ad5..86d9bb8 100644
--- a/drivers/firmware/xilinx/zynqmp.c
+++ b/drivers/firmware/xilinx/zynqmp.c
@@ -260,9 +260,23 @@ static int zynqmp_pm_ioctl(u32 node_id, u32 ioctl_id, u32 arg1, u32 arg2,
 				   arg1, arg2, out);
 }
 
+/**
+ * zynqmp_pm_query_data() - Get query data from firmware
+ * @qdata:	Variable to the zynqmp_pm_query_data structure
+ * @out:	Returned output value
+ *
+ * Return: Returns status, either success or error+reason
+ */
+static int zynqmp_pm_query_data(struct zynqmp_pm_query_data qdata, u32 *out)
+{
+	return zynqmp_pm_invoke_fn(PM_QUERY_DATA, qdata.qid, qdata.arg1,
+				   qdata.arg2, qdata.arg3, out);
+}
+
 static const struct zynqmp_eemi_ops eemi_ops = {
 	.get_api_version = zynqmp_pm_get_api_version,
 	.ioctl = zynqmp_pm_ioctl,
+	.query_data = zynqmp_pm_query_data,
 };
 
 /**
diff --git a/include/linux/firmware/xlnx-zynqmp.h b/include/linux/firmware/xlnx-zynqmp.h
index 2eec6e7..354385d 100644
--- a/include/linux/firmware/xlnx-zynqmp.h
+++ b/include/linux/firmware/xlnx-zynqmp.h
@@ -35,6 +35,7 @@
 enum pm_api_id {
 	PM_GET_API_VERSION = 1,
 	PM_IOCTL = 34,
+	PM_QUERY_DATA,
 };
 
 /* PMU-FW return status codes */
@@ -48,9 +49,28 @@ enum pm_ret_status {
 	XST_PM_ABORT_SUSPEND,
 };
 
+enum pm_query_id {
+	PM_QID_INVALID,
+};
+
+/**
+ * struct zynqmp_pm_query_data - PM query data structure
+ * @qid:	query ID
+ * @arg1:	Argument 1 of query data
+ * @arg2:	Argument 2 of query data
+ * @arg3:	Argument 3 of query data
+ */
+struct zynqmp_pm_query_data {
+	u32 qid;
+	u32 arg1;
+	u32 arg2;
+	u32 arg3;
+};
+
 struct zynqmp_eemi_ops {
 	int (*get_api_version)(u32 *version);
 	int (*ioctl)(u32 node_id, u32 ioctl_id, u32 arg1, u32 arg2, u32 *out);
+	int (*query_data)(struct zynqmp_pm_query_data qdata, u32 *out);
 };
 
 #if IS_REACHABLE(CONFIG_ARCH_ZYNQMP)
-- 
2.7.4