linux-kernel - [PATCH v7 08/10] firmware: xilinx: Add debugfs for query data API

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Date:   Wed, 30 May 2018 13:55:23 -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 08/10] firmware: xilinx: Add debugfs for query data API

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

Add debugfs file to query platform specific data from firmware
using debugfs interface.

Signed-off-by: Rajan Vaja <rajanv@...inx.com>
Signed-off-by: Jolly Shah <jollys@...inx.com>
---
 drivers/firmware/xilinx/zynqmp-debug.c | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/drivers/firmware/xilinx/zynqmp-debug.c b/drivers/firmware/xilinx/zynqmp-debug.c
index 148dbff..1cb69f7 100644
--- a/drivers/firmware/xilinx/zynqmp-debug.c
+++ b/drivers/firmware/xilinx/zynqmp-debug.c
@@ -33,6 +33,7 @@ static char debugfs_buf[PAGE_SIZE];
 static struct pm_api_info pm_api_list[] = {
 	PM_API(PM_GET_API_VERSION),
 	PM_API(PM_IOCTL),
+	PM_API(PM_QUERY_DATA),
 };
 
 /**
@@ -105,6 +106,32 @@ static int process_api_request(u32 pm_id, u64 *pm_api_arg, u32 *pm_api_ret)
 			sprintf(debugfs_buf, "IOCTL return value: %u\n",
 				pm_api_ret[1]);
 		break;
+	case PM_QUERY_DATA:
+	{
+		struct zynqmp_pm_query_data qdata = {0};
+
+		qdata.qid = pm_api_arg[0];
+		qdata.arg1 = pm_api_arg[1];
+		qdata.arg2 = pm_api_arg[2];
+		qdata.arg3 = pm_api_arg[3];
+
+		ret = eemi_ops->query_data(qdata, pm_api_ret);
+		if (ret)
+			break;
+
+		if (qdata.qid == PM_QID_CLOCK_GET_NAME)
+			sprintf(debugfs_buf, "Clock name = %s\n",
+				(char *)pm_api_ret);
+		else if (qdata.qid == PM_QID_CLOCK_GET_FIXEDFACTOR_PARAMS)
+			sprintf(debugfs_buf, "Multiplier = %d, Divider = %d\n",
+				pm_api_ret[1], pm_api_ret[2]);
+		else
+			sprintf(debugfs_buf,
+				"data[0] = 0x%08x\ndata[1] = 0x%08x\n data[2] = 0x%08x\ndata[3] = 0x%08x\n",
+				pm_api_ret[0], pm_api_ret[1],
+				pm_api_ret[2], pm_api_ret[3]);
+		break;
+	}
 	default:
 		sprintf(debugfs_buf, "Unsupported PM-API request\n");
 		ret = -EINVAL;
-- 
2.7.4