linux-kernel - [PATCH v6 09/11] firmware: xilinx: Add debugfs for clock control APIs

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Date:   Tue, 10 Apr 2018 12:38:45 -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 v6 09/11] firmware: xilinx: Add debugfs for clock control APIs

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

Add debugfs file to control clocks using firmware APIs
through debugfs interface.

Signed-off-by: Rajan Vaja <rajanv@...inx.com>
Signed-off-by: Jolly Shah <jollys@...inx.com>
---
 drivers/firmware/xilinx/zynqmp-debug.c | 48 ++++++++++++++++++++++++++++++++++
 1 file changed, 48 insertions(+)

diff --git a/drivers/firmware/xilinx/zynqmp-debug.c b/drivers/firmware/xilinx/zynqmp-debug.c
index 1cb69f7..837fcd1 100644
--- a/drivers/firmware/xilinx/zynqmp-debug.c
+++ b/drivers/firmware/xilinx/zynqmp-debug.c
@@ -34,6 +34,15 @@ static struct pm_api_info pm_api_list[] = {
 	PM_API(PM_GET_API_VERSION),
 	PM_API(PM_IOCTL),
 	PM_API(PM_QUERY_DATA),
+	PM_API(PM_CLOCK_ENABLE),
+	PM_API(PM_CLOCK_DISABLE),
+	PM_API(PM_CLOCK_GETSTATE),
+	PM_API(PM_CLOCK_SETDIVIDER),
+	PM_API(PM_CLOCK_GETDIVIDER),
+	PM_API(PM_CLOCK_SETRATE),
+	PM_API(PM_CLOCK_GETRATE),
+	PM_API(PM_CLOCK_SETPARENT),
+	PM_API(PM_CLOCK_GETPARENT),
 };
 
 /**
@@ -87,6 +96,7 @@ static int process_api_request(u32 pm_id, u64 *pm_api_arg, u32 *pm_api_ret)
 	const struct zynqmp_eemi_ops *eemi_ops = zynqmp_pm_get_eemi_ops();
 	u32 pm_api_version;
 	int ret;
+	u64 rate;
 
 	if (!eemi_ops)
 		return -ENXIO;
@@ -132,6 +142,44 @@ static int process_api_request(u32 pm_id, u64 *pm_api_arg, u32 *pm_api_ret)
 				pm_api_ret[2], pm_api_ret[3]);
 		break;
 	}
+	case PM_CLOCK_ENABLE:
+		ret = eemi_ops->clock_enable(pm_api_arg[0]);
+		break;
+	case PM_CLOCK_DISABLE:
+		ret = eemi_ops->clock_disable(pm_api_arg[0]);
+		break;
+	case PM_CLOCK_GETSTATE:
+		ret = eemi_ops->clock_getstate(pm_api_arg[0], &pm_api_ret[0]);
+		if (!ret)
+			sprintf(debugfs_buf, "Clock state: %u\n",
+				pm_api_ret[0]);
+		break;
+	case PM_CLOCK_SETDIVIDER:
+		ret = eemi_ops->clock_setdivider(pm_api_arg[0], pm_api_arg[1]);
+		break;
+	case PM_CLOCK_GETDIVIDER:
+		ret = eemi_ops->clock_getdivider(pm_api_arg[0], &pm_api_ret[0]);
+		if (!ret)
+			sprintf(debugfs_buf, "Divider Value: %d\n",
+				pm_api_ret[0]);
+		break;
+	case PM_CLOCK_SETRATE:
+		ret = eemi_ops->clock_setrate(pm_api_arg[0], pm_api_arg[1]);
+		break;
+	case PM_CLOCK_GETRATE:
+		ret = eemi_ops->clock_getrate(pm_api_arg[0], &rate);
+		if (!ret)
+			sprintf(debugfs_buf, "Clock rate :%llu\n", rate);
+		break;
+	case PM_CLOCK_SETPARENT:
+		ret = eemi_ops->clock_setparent(pm_api_arg[0], pm_api_arg[1]);
+		break;
+	case PM_CLOCK_GETPARENT:
+		ret = eemi_ops->clock_getparent(pm_api_arg[0], &pm_api_ret[0]);
+		if (!ret)
+			sprintf(debugfs_buf,
+				"Clock parent Index: %u\n", pm_api_ret[0]);
+		break;
 	default:
 		sprintf(debugfs_buf, "Unsupported PM-API request\n");
 		ret = -EINVAL;
-- 
2.7.4