linux-kernel - [RFC PATCH v1 13/18] gpu: host1x: mipi: Add of_tegra_mipi

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Message-ID: <1591768960-31648-14-git-send-email-skomatineni@nvidia.com>
Date:   Tue, 9 Jun 2020 23:02:35 -0700
From:   Sowjanya Komatineni <skomatineni@...dia.com>
To:     <skomatineni@...dia.com>, <thierry.reding@...il.com>,
        <jonathanh@...dia.com>, <frankc@...dia.com>, <hverkuil@...all.nl>,
        <sakari.ailus@....fi>, <robh+dt@...nel.org>,
        <helen.koike@...labora.com>
CC:     <digetx@...il.com>, <sboyd@...nel.org>,
        <gregkh@...uxfoundation.org>, <linux-media@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-tegra@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linux-i2c@...r.kernel.org>
Subject: [RFC PATCH v1 13/18] gpu: host1x: mipi: Add of_tegra_mipi_request() API

This patch adds an API of_tegra_mipi_request() to allow creating
mipi device for specific device node rather than a device so Tegra
CSI driver can use it for calibrating MIPI pads for each stream
independently.

Signed-off-by: Sowjanya Komatineni <skomatineni@...dia.com>
---
 drivers/gpu/host1x/mipi.c | 10 ++++++++--
 include/linux/host1x.h    |  2 ++
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/host1x/mipi.c b/drivers/gpu/host1x/mipi.c
index e00809d..f51fe69 100644
--- a/drivers/gpu/host1x/mipi.c
+++ b/drivers/gpu/host1x/mipi.c
@@ -206,9 +206,9 @@ static int tegra_mipi_power_down(struct tegra_mipi *mipi)
 	return 0;
 }
 
-struct tegra_mipi_device *tegra_mipi_request(struct device *device)
+struct tegra_mipi_device *of_tegra_mipi_request(struct device *device,
+						struct device_node *np)
 {
-	struct device_node *np = device->of_node;
 	struct tegra_mipi_device *dev;
 	struct of_phandle_args args;
 	int err;
@@ -252,6 +252,12 @@ struct tegra_mipi_device *tegra_mipi_request(struct device *device)
 	of_node_put(args.np);
 	return ERR_PTR(err);
 }
+EXPORT_SYMBOL(of_tegra_mipi_request);
+
+struct tegra_mipi_device *tegra_mipi_request(struct device *device)
+{
+	return of_tegra_mipi_request(device, device->of_node);
+}
 EXPORT_SYMBOL(tegra_mipi_request);
 
 void tegra_mipi_free(struct tegra_mipi_device *device)
diff --git a/include/linux/host1x.h b/include/linux/host1x.h
index c230b4e..a61ca52 100644
--- a/include/linux/host1x.h
+++ b/include/linux/host1x.h
@@ -325,6 +325,8 @@ int host1x_client_resume(struct host1x_client *client);
 
 struct tegra_mipi_device;
 
+struct tegra_mipi_device *of_tegra_mipi_request(struct device *device,
+						struct device_node *np);
 struct tegra_mipi_device *tegra_mipi_request(struct device *device);
 void tegra_mipi_free(struct tegra_mipi_device *device);
 int tegra_mipi_enable(struct tegra_mipi_device *device);
-- 
2.7.4