[PATCH v2 1/3] of: add common OF-based component functionality

[PATCH v2 1/3] of: add common OF-based component functionality

[Russell King]

Add common OF-based component functionality for matching devices by
device node, and releasing the device node at the appropraite time.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
---
 drivers/of/Makefile          |  2 +-
 drivers/of/of_component.c    | 41 +++++++++++++++++++++++++++++++++++++++++
 include/linux/of_component.h | 14 ++++++++++++++
 3 files changed, 56 insertions(+), 1 deletion(-)
 create mode 100644 drivers/of/of_component.c
 create mode 100644 include/linux/of_component.h

diff --git a/drivers/of/Makefile b/drivers/of/Makefile
index d7efd9d458aa..6a4a5e2c0839 100644
--- a/drivers/of/Makefile
+++ b/drivers/of/Makefile
@@ -1,4 +1,4 @@
-obj-y = base.o device.o platform.o
+obj-y = base.o of_component.o device.o platform.o
 obj-$(CONFIG_OF_DYNAMIC) += dynamic.o
 obj-$(CONFIG_OF_FLATTREE) += fdt.o
 obj-$(CONFIG_OF_EARLY_FLATTREE) += fdt_address.o
diff --git a/drivers/of/of_component.c b/drivers/of/of_component.c
new file mode 100644
index 000000000000..41e6e817d264
--- /dev/null
+++ b/drivers/of/of_component.c
@@ -0,0 +1,41 @@
+/*
+ * Copyright (C) 2016 Russell King.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/component.h>
+#include <linux/device.h>
+#include <linux/of.h>
+#include <linux/of_component.h>
+#include <linux/of_graph.h>
+
+static void component_release_of(struct device *dev, void *data)
+{
+	of_node_put(data);
+}
+
+void component_match_add_of_compare(struct device *master,
+	struct component_match **matchptr,
+	int (*compare)(struct device *, void *), struct device_node *node)
+{
+	of_node_get(node);
+	component_match_add_release(master, matchptr, component_release_of,
+				    compare, node);
+}
+EXPORT_SYMBOL_GPL(component_match_add_of_compare);
+
+static void component_compare_of(struct device *dev, void *data)
+{
+	return dev->of_node == data;
+}
+
+void component_match_add_of(struct device *master,
+	struct component_match **matchptr, struct device_node *node)
+{
+	of_node_get(node);
+	component_match_add_release(master, matchptr, component_release_of,
+				    component_compare_of, node);
+}
+EXPORT_SYMBOL_GPL(component_match_add_of);
diff --git a/include/linux/of_component.h b/include/linux/of_component.h
new file mode 100644
index 000000000000..a8170ba3b786
--- /dev/null
+++ b/include/linux/of_component.h
@@ -0,0 +1,14 @@
+#ifndef __LINUX_COMPONENT_OF_H
+#define __LINUX_COMPONENT_OF_H
+
+struct component_match;
+struct device;
+struct device_node;
+
+void component_match_add_of_compare(struct device *master,
+	struct component_match **matchptr,
+	int (*compare)(struct device *, void *), struct device_node *node);
+void component_match_add_of(struct device *master,
+	struct component_match **matchptr, struct device_node *node);
+
+#endif
-- 
2.1.0

Re: [PATCH v2 1/3] of: add common OF-based component functionality

[Rob Herring]

On Fri, Jun 3, 2016 at 9:21 AM, Russell King <rmk+kernel-I+IVW8TIWO2tmTQ+vhA3Yw@public.gmane.org> wrote:
> Add common OF-based component functionality for matching devices by
> device node, and releasing the device node at the appropraite time.
>
> Signed-off-by: Russell King <rmk+kernel-I+IVW8TIWO2tmTQ+vhA3Yw@public.gmane.org>
> ---
>  drivers/of/Makefile          |  2 +-
>  drivers/of/of_component.c    | 41 +++++++++++++++++++++++++++++++++++++++++
>  include/linux/of_component.h | 14 ++++++++++++++

I'd prefer this to go into drivers/base/component.c. That's the
general direction we've been moving.

I'd expect this would cause some build failures unless the cases you
converted all depend on CONFIG_OF.

Rob
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Re: [PATCH v2 1/3] of: add common OF-based component functionality

[Russell King - ARM Linux]

On Fri, Jun 03, 2016 at 10:29:40AM -0500, Rob Herring wrote:
> On Fri, Jun 3, 2016 at 9:21 AM, Russell King <rmk+kernel@armlinux.org.uk> wrote:
> > Add common OF-based component functionality for matching devices by
> > device node, and releasing the device node at the appropraite time.
> >
> > Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
> > ---
> >  drivers/of/Makefile          |  2 +-
> >  drivers/of/of_component.c    | 41 +++++++++++++++++++++++++++++++++++++++++
> >  include/linux/of_component.h | 14 ++++++++++++++
> 
> I'd prefer this to go into drivers/base/component.c. That's the
> general direction we've been moving.

I'd prefer not to, I don't want to turn the component helpers into
something OF specific.  They aren't OF specific.

> I'd expect this would cause some build failures unless the cases you
> converted all depend on CONFIG_OF.

Okay, I'll stick with v1 then, and the duplication that v1 involves.

-- 
RMK's Patch system: http://www.armlinux.org.uk/developer/patches/
FTTC broadband for 0.8mile line: currently at 9.6Mbps down 400kbps up
according to speedtest.net.

Re: [PATCH v2 1/3] of: add common OF-based component functionality

[Rob Herring]

On Fri, Jun 3, 2016 at 10:36 AM, Russell King - ARM Linux
<linux@armlinux.org.uk> wrote:
> On Fri, Jun 03, 2016 at 10:29:40AM -0500, Rob Herring wrote:
>> On Fri, Jun 3, 2016 at 9:21 AM, Russell King <rmk+kernel@armlinux.org.uk> wrote:
>> > Add common OF-based component functionality for matching devices by
>> > device node, and releasing the device node at the appropraite time.
>> >
>> > Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
>> > ---
>> >  drivers/of/Makefile          |  2 +-
>> >  drivers/of/of_component.c    | 41 +++++++++++++++++++++++++++++++++++++++++
>> >  include/linux/of_component.h | 14 ++++++++++++++
>>
>> I'd prefer this to go into drivers/base/component.c. That's the
>> general direction we've been moving.
>
> I'd prefer not to, I don't want to turn the component helpers into
> something OF specific.  They aren't OF specific.

Fine, not enough code to argue about...

>> I'd expect this would cause some build failures unless the cases you
>> converted all depend on CONFIG_OF.
>
> Okay, I'll stick with v1 then, and the duplication that v1 involves.

Why? You don't want to add empty functions? Seems like good clean-up.

Rob

Re: [PATCH v2 1/3] of: add common OF-based component functionality

[Thierry Reding]

[-- Attachment #1: Type: text/plain, Size: 354 bytes --]

On Fri, Jun 03, 2016 at 03:21:19PM +0100, Russell King wrote:
[...]
> diff --git a/drivers/of/of_component.c b/drivers/of/of_component.c
[...]
> +static void component_compare_of(struct device *dev, void *data)
> +{
> +	return dev->of_node == data;
> +}

The return statement here doesn't match the return value. Didn't GCC
complain about this?

Thierry

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Re: [PATCH v2 1/3] of: add common OF-based component functionality

[Russell King - ARM Linux]

On Fri, Jun 03, 2016 at 05:44:30PM +0200, Thierry Reding wrote:
> On Fri, Jun 03, 2016 at 03:21:19PM +0100, Russell King wrote:
> [...]
> > diff --git a/drivers/of/of_component.c b/drivers/of/of_component.c
> [...]
> > +static void component_compare_of(struct device *dev, void *data)
> > +{
> > +	return dev->of_node == data;
> > +}
> 
> The return statement here doesn't match the return value. Didn't GCC
> complain about this?

I didn't build-test it, because I wanted people's opinions on it first
(building means rebuilding my entire tree...)

Anyway, the patch series is dead because I'm not prepared to make the
changes which Rob mentioned, so we're back to v1 instead.

-- 
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[PATCH v2 2/3] drm: convert DT component matching to component_match_add_release()

[Russell King]

Convert DT component matching to use component_match_add_release().

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
---
 drivers/gpu/drm/arm/hdlcd_drv.c             |  9 +++------
 drivers/gpu/drm/armada/armada_drv.c         |  8 ++------
 drivers/gpu/drm/drm_of.c                    |  6 ++++--
 drivers/gpu/drm/etnaviv/etnaviv_drv.c       | 11 ++---------
 drivers/gpu/drm/msm/msm_drv.c               |  8 ++------
 drivers/gpu/drm/msm/msm_drv.h               |  1 +
 drivers/gpu/drm/rockchip/rockchip_drm_drv.c | 12 +++---------
 drivers/gpu/drm/sti/sti_drv.c               |  9 ++-------
 drivers/gpu/drm/tilcdc/tilcdc_external.c    |  8 ++------
 9 files changed, 21 insertions(+), 51 deletions(-)

diff --git a/drivers/gpu/drm/arm/hdlcd_drv.c b/drivers/gpu/drm/arm/hdlcd_drv.c
index b987c63ba8d6..f00845c25795 100644
--- a/drivers/gpu/drm/arm/hdlcd_drv.c
+++ b/drivers/gpu/drm/arm/hdlcd_drv.c
@@ -14,6 +14,7 @@
 #include <linux/clk.h>
 #include <linux/component.h>
 #include <linux/list.h>
+#include <linux/of_component.h>
 #include <linux/of_graph.h>
 #include <linux/of_reserved_mem.h>
 #include <linux/pm_runtime.h>
@@ -443,11 +444,6 @@ static const struct component_master_ops hdlcd_master_ops = {
 	.unbind		= hdlcd_drm_unbind,
 };
 
-static int compare_dev(struct device *dev, void *data)
-{
-	return dev->of_node == data;
-}
-
 static int hdlcd_probe(struct platform_device *pdev)
 {
 	struct device_node *port, *ep;
@@ -474,7 +470,8 @@ static int hdlcd_probe(struct platform_device *pdev)
 		return -EAGAIN;
 	}
 
-	component_match_add(&pdev->dev, &match, compare_dev, port);
+	component_match_add_of(&pdev->dev, &match, port);
+	of_node_put(port);
 
 	return component_master_add_with_match(&pdev->dev, &hdlcd_master_ops,
 					       match);
diff --git a/drivers/gpu/drm/armada/armada_drv.c b/drivers/gpu/drm/armada/armada_drv.c
index 439824a61aa5..f2716d20c257 100644
--- a/drivers/gpu/drm/armada/armada_drv.c
+++ b/drivers/gpu/drm/armada/armada_drv.c
@@ -9,6 +9,7 @@
 #include <linux/component.h>
 #include <linux/module.h>
 #include <linux/of_graph.h>
+#include <linux/of_component.h>
 #include <drm/drmP.h>
 #include <drm/drm_crtc_helper.h>
 #include <drm/drm_of.h>
@@ -227,11 +228,6 @@ static void armada_drm_unbind(struct device *dev)
 	drm_put_dev(dev_get_drvdata(dev));
 }
 
-static int compare_of(struct device *dev, void *data)
-{
-	return dev->of_node == data;
-}
-
 static int compare_dev_name(struct device *dev, void *data)
 {
 	const char *name = data;
@@ -255,7 +251,7 @@ static void armada_add_endpoints(struct device *dev,
 			continue;
 		}
 
-		component_match_add(dev, match, compare_of, remote);
+		component_match_add_of(dev, match, remote);
 		of_node_put(remote);
 	}
 }
diff --git a/drivers/gpu/drm/drm_of.c b/drivers/gpu/drm/drm_of.c
index bc98bb94264d..d13fc633aeea 100644
--- a/drivers/gpu/drm/drm_of.c
+++ b/drivers/gpu/drm/drm_of.c
@@ -1,6 +1,7 @@
 #include <linux/component.h>
 #include <linux/export.h>
 #include <linux/list.h>
+#include <linux/of_component.h>
 #include <linux/of_graph.h>
 #include <drm/drmP.h>
 #include <drm/drm_crtc.h>
@@ -101,7 +102,7 @@ int drm_of_component_probe(struct device *dev,
 			continue;
 		}
 
-		component_match_add(dev, &match, compare_of, port);
+		component_match_add_of(dev, &match, compare_of, port);
 		of_node_put(port);
 	}
 
@@ -140,7 +141,8 @@ int drm_of_component_probe(struct device *dev,
 				continue;
 			}
 
-			component_match_add(dev, &match, compare_of, remote);
+			component_match_add_of_compare(dev, &match, compare_of,
+						       remote);
 			of_node_put(remote);
 		}
 		of_node_put(port);
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_drv.c b/drivers/gpu/drm/etnaviv/etnaviv_drv.c
index 3d4f56df8359..a0e0764a6269 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_drv.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_drv.c
@@ -15,6 +15,7 @@
  */
 
 #include <linux/component.h>
+#include <linux/of_component.h>
 #include <linux/of_platform.h>
 
 #include "etnaviv_drv.h"
@@ -606,13 +607,6 @@ static const struct component_master_ops etnaviv_master_ops = {
 	.unbind = etnaviv_unbind,
 };
 
-static int compare_of(struct device *dev, void *data)
-{
-	struct device_node *np = data;
-
-	return dev->of_node == np;
-}
-
 static int compare_str(struct device *dev, void *data)
 {
 	return !strcmp(dev_name(dev), data);
@@ -635,8 +629,7 @@ static int etnaviv_pdev_probe(struct platform_device *pdev)
 			if (!core_node)
 				break;
 
-			component_match_add(&pdev->dev, &match, compare_of,
-					    core_node);
+			component_match_add_of(&pdev->dev, &match, core_node);
 			of_node_put(core_node);
 		}
 	} else if (dev->platform_data) {
diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c
index 9c654092ef78..5293aa775c5a 100644
--- a/drivers/gpu/drm/msm/msm_drv.c
+++ b/drivers/gpu/drm/msm/msm_drv.c
@@ -800,11 +800,6 @@ static const struct dev_pm_ops msm_pm_ops = {
  * NOTE: duplication of the same code as exynos or imx (or probably any other).
  * so probably some room for some helpers
  */
-static int compare_of(struct device *dev, void *data)
-{
-	return dev->of_node == data;
-}
-
 static int add_components(struct device *dev, struct component_match **matchptr,
 		const char *name)
 {
@@ -818,7 +813,8 @@ static int add_components(struct device *dev, struct component_match **matchptr,
 		if (!node)
 			break;
 
-		component_match_add(dev, matchptr, compare_of, node);
+		component_match_add_of(dev, matchptr, node);
+		of_node_put(node);
 	}
 
 	return 0;
diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h
index 5b2963f32291..66dafecaf115 100644
--- a/drivers/gpu/drm/msm/msm_drv.h
+++ b/drivers/gpu/drm/msm/msm_drv.h
@@ -30,6 +30,7 @@
 #include <linux/list.h>
 #include <linux/iommu.h>
 #include <linux/types.h>
+#include <linux/of_component.h>
 #include <linux/of_graph.h>
 #include <linux/of_device.h>
 #include <asm/sizes.h>
diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
index a409d1f703cb..84c50f6770c3 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
@@ -22,6 +22,7 @@
 #include <linux/dma-mapping.h>
 #include <linux/pm_runtime.h>
 #include <linux/module.h>
+#include <linux/of_component.h>
 #include <linux/of_graph.h>
 #include <linux/component.h>
 
@@ -414,13 +415,6 @@ static const struct dev_pm_ops rockchip_drm_pm_ops = {
 				rockchip_drm_sys_resume)
 };
 
-static int compare_of(struct device *dev, void *data)
-{
-	struct device_node *np = data;
-
-	return dev->of_node == np;
-}
-
 static void rockchip_add_endpoints(struct device *dev,
 				   struct component_match **match,
 				   struct device_node *port)
@@ -439,7 +433,7 @@ static void rockchip_add_endpoints(struct device *dev,
 			continue;
 		}
 
-		component_match_add(dev, match, compare_of, remote);
+		component_match_add_of(dev, match, remote);
 		of_node_put(remote);
 	}
 }
@@ -518,7 +512,7 @@ static int rockchip_drm_platform_probe(struct platform_device *pdev)
 			is_support_iommu = false;
 		}
 
-		component_match_add(dev, &match, compare_of, port->parent);
+		component_match_add_of(dev, &match, port->parent);
 		of_node_put(port);
 	}
 
diff --git a/drivers/gpu/drm/sti/sti_drv.c b/drivers/gpu/drm/sti/sti_drv.c
index 872495e72294..aeb2787c9bd4 100644
--- a/drivers/gpu/drm/sti/sti_drv.c
+++ b/drivers/gpu/drm/sti/sti_drv.c
@@ -10,6 +10,7 @@
 #include <linux/debugfs.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
+#include <linux/of_component.h>
 #include <linux/of_platform.h>
 
 #include <drm/drm_atomic.h>
@@ -341,11 +342,6 @@ static struct drm_driver sti_driver = {
 	.minor = DRIVER_MINOR,
 };
 
-static int compare_of(struct device *dev, void *data)
-{
-	return dev->of_node == data;
-}
-
 static int sti_bind(struct device *dev)
 {
 	return drm_platform_init(&sti_driver, to_platform_device(dev));
@@ -375,8 +371,7 @@ static int sti_platform_probe(struct platform_device *pdev)
 	child_np = of_get_next_available_child(node, NULL);
 
 	while (child_np) {
-		component_match_add(dev, &match, compare_of, child_np);
-		of_node_put(child_np);
+		component_match_add_of(dev, &match, child_np);
 		child_np = of_get_next_available_child(node, child_np);
 	}
 
diff --git a/drivers/gpu/drm/tilcdc/tilcdc_external.c b/drivers/gpu/drm/tilcdc/tilcdc_external.c
index 03acb4f99982..1b3fd9fa4bef 100644
--- a/drivers/gpu/drm/tilcdc/tilcdc_external.c
+++ b/drivers/gpu/drm/tilcdc/tilcdc_external.c
@@ -9,6 +9,7 @@
  */
 
 #include <linux/component.h>
+#include <linux/of_component.h>
 #include <linux/of_graph.h>
 
 #include "tilcdc_drv.h"
@@ -130,11 +131,6 @@ void tilcdc_remove_external_encoders(struct drm_device *dev)
 						 priv->connector_funcs[i]);
 }
 
-static int dev_match_of(struct device *dev, void *data)
-{
-	return dev->of_node == data;
-}
-
 int tilcdc_get_external_components(struct device *dev,
 				   struct component_match **match)
 {
@@ -152,7 +148,7 @@ int tilcdc_get_external_components(struct device *dev,
 
 		dev_dbg(dev, "Subdevice node '%s' found\n", node->name);
 		if (match)
-			component_match_add(dev, match, dev_match_of, node);
+			component_match_add_of(dev, match, node);
 		of_node_put(node);
 		count++;
 	}
-- 
2.1.0

Re: [PATCH v2 2/3] drm: convert DT component matching to component_match_add_release()

[Lucas Stach]

Am Freitag, den 03.06.2016, 15:21 +0100 schrieb Russell King:
> Convert DT component matching to use component_match_add_release().
> 
> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
> ---
>  drivers/gpu/drm/arm/hdlcd_drv.c             |  9 +++------
>  drivers/gpu/drm/armada/armada_drv.c         |  8 ++------
>  drivers/gpu/drm/drm_of.c                    |  6 ++++--
>  drivers/gpu/drm/etnaviv/etnaviv_drv.c       | 11 ++---------

For the etnaviv part:

Acked-by: Lucas Stach <l.stach@pengutronix.de>

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Re: [PATCH v2 2/3] drm: convert DT component matching to component_match_add_release()

[Liviu Dudau]

On Fri, Jun 03, 2016 at 03:21:25PM +0100, Russell King wrote:
> Convert DT component matching to use component_match_add_release().
> 
> Signed-off-by: Russell King <rmk+kernel-I+IVW8TIWO2tmTQ+vhA3Yw@public.gmane.org>
> ---
>  drivers/gpu/drm/arm/hdlcd_drv.c             |  9 +++------
>  drivers/gpu/drm/armada/armada_drv.c         |  8 ++------
>  drivers/gpu/drm/drm_of.c                    |  6 ++++--
>  drivers/gpu/drm/etnaviv/etnaviv_drv.c       | 11 ++---------
>  drivers/gpu/drm/msm/msm_drv.c               |  8 ++------
>  drivers/gpu/drm/msm/msm_drv.h               |  1 +
>  drivers/gpu/drm/rockchip/rockchip_drm_drv.c | 12 +++---------
>  drivers/gpu/drm/sti/sti_drv.c               |  9 ++-------
>  drivers/gpu/drm/tilcdc/tilcdc_external.c    |  8 ++------
>  9 files changed, 21 insertions(+), 51 deletions(-)
> 
> diff --git a/drivers/gpu/drm/arm/hdlcd_drv.c b/drivers/gpu/drm/arm/hdlcd_drv.c
> index b987c63ba8d6..f00845c25795 100644
> --- a/drivers/gpu/drm/arm/hdlcd_drv.c
> +++ b/drivers/gpu/drm/arm/hdlcd_drv.c
> @@ -14,6 +14,7 @@
>  #include <linux/clk.h>
>  #include <linux/component.h>
>  #include <linux/list.h>
> +#include <linux/of_component.h>
>  #include <linux/of_graph.h>
>  #include <linux/of_reserved_mem.h>
>  #include <linux/pm_runtime.h>
> @@ -443,11 +444,6 @@ static const struct component_master_ops hdlcd_master_ops = {
>  	.unbind		= hdlcd_drm_unbind,
>  };
>  
> -static int compare_dev(struct device *dev, void *data)
> -{
> -	return dev->of_node == data;
> -}
> -
>  static int hdlcd_probe(struct platform_device *pdev)
>  {
>  	struct device_node *port, *ep;
> @@ -474,7 +470,8 @@ static int hdlcd_probe(struct platform_device *pdev)
>  		return -EAGAIN;
>  	}
>  
> -	component_match_add(&pdev->dev, &match, compare_dev, port);
> +	component_match_add_of(&pdev->dev, &match, port);
> +	of_node_put(port);
>  
>  	return component_master_add_with_match(&pdev->dev, &hdlcd_master_ops,
>  					       match);

For the HDLCD part of v2:

Acked-by: Liviu Dudau <Liviu.Dudau-5wv7dgnIgG8@public.gmane.org>


> diff --git a/drivers/gpu/drm/armada/armada_drv.c b/drivers/gpu/drm/armada/armada_drv.c
> index 439824a61aa5..f2716d20c257 100644
> --- a/drivers/gpu/drm/armada/armada_drv.c
> +++ b/drivers/gpu/drm/armada/armada_drv.c
> @@ -9,6 +9,7 @@
>  #include <linux/component.h>
>  #include <linux/module.h>
>  #include <linux/of_graph.h>
> +#include <linux/of_component.h>
>  #include <drm/drmP.h>
>  #include <drm/drm_crtc_helper.h>
>  #include <drm/drm_of.h>
> @@ -227,11 +228,6 @@ static void armada_drm_unbind(struct device *dev)
>  	drm_put_dev(dev_get_drvdata(dev));
>  }
>  
> -static int compare_of(struct device *dev, void *data)
> -{
> -	return dev->of_node == data;
> -}
> -
>  static int compare_dev_name(struct device *dev, void *data)
>  {
>  	const char *name = data;
> @@ -255,7 +251,7 @@ static void armada_add_endpoints(struct device *dev,
>  			continue;
>  		}
>  
> -		component_match_add(dev, match, compare_of, remote);
> +		component_match_add_of(dev, match, remote);
>  		of_node_put(remote);
>  	}
>  }
> diff --git a/drivers/gpu/drm/drm_of.c b/drivers/gpu/drm/drm_of.c
> index bc98bb94264d..d13fc633aeea 100644
> --- a/drivers/gpu/drm/drm_of.c
> +++ b/drivers/gpu/drm/drm_of.c
> @@ -1,6 +1,7 @@
>  #include <linux/component.h>
>  #include <linux/export.h>
>  #include <linux/list.h>
> +#include <linux/of_component.h>
>  #include <linux/of_graph.h>
>  #include <drm/drmP.h>
>  #include <drm/drm_crtc.h>
> @@ -101,7 +102,7 @@ int drm_of_component_probe(struct device *dev,
>  			continue;
>  		}
>  
> -		component_match_add(dev, &match, compare_of, port);
> +		component_match_add_of(dev, &match, compare_of, port);
>  		of_node_put(port);
>  	}
>  
> @@ -140,7 +141,8 @@ int drm_of_component_probe(struct device *dev,
>  				continue;
>  			}
>  
> -			component_match_add(dev, &match, compare_of, remote);
> +			component_match_add_of_compare(dev, &match, compare_of,
> +						       remote);
>  			of_node_put(remote);
>  		}
>  		of_node_put(port);
> diff --git a/drivers/gpu/drm/etnaviv/etnaviv_drv.c b/drivers/gpu/drm/etnaviv/etnaviv_drv.c
> index 3d4f56df8359..a0e0764a6269 100644
> --- a/drivers/gpu/drm/etnaviv/etnaviv_drv.c
> +++ b/drivers/gpu/drm/etnaviv/etnaviv_drv.c
> @@ -15,6 +15,7 @@
>   */
>  
>  #include <linux/component.h>
> +#include <linux/of_component.h>
>  #include <linux/of_platform.h>
>  
>  #include "etnaviv_drv.h"
> @@ -606,13 +607,6 @@ static const struct component_master_ops etnaviv_master_ops = {
>  	.unbind = etnaviv_unbind,
>  };
>  
> -static int compare_of(struct device *dev, void *data)
> -{
> -	struct device_node *np = data;
> -
> -	return dev->of_node == np;
> -}
> -
>  static int compare_str(struct device *dev, void *data)
>  {
>  	return !strcmp(dev_name(dev), data);
> @@ -635,8 +629,7 @@ static int etnaviv_pdev_probe(struct platform_device *pdev)
>  			if (!core_node)
>  				break;
>  
> -			component_match_add(&pdev->dev, &match, compare_of,
> -					    core_node);
> +			component_match_add_of(&pdev->dev, &match, core_node);
>  			of_node_put(core_node);
>  		}
>  	} else if (dev->platform_data) {
> diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c
> index 9c654092ef78..5293aa775c5a 100644
> --- a/drivers/gpu/drm/msm/msm_drv.c
> +++ b/drivers/gpu/drm/msm/msm_drv.c
> @@ -800,11 +800,6 @@ static const struct dev_pm_ops msm_pm_ops = {
>   * NOTE: duplication of the same code as exynos or imx (or probably any other).
>   * so probably some room for some helpers
>   */
> -static int compare_of(struct device *dev, void *data)
> -{
> -	return dev->of_node == data;
> -}
> -
>  static int add_components(struct device *dev, struct component_match **matchptr,
>  		const char *name)
>  {
> @@ -818,7 +813,8 @@ static int add_components(struct device *dev, struct component_match **matchptr,
>  		if (!node)
>  			break;
>  
> -		component_match_add(dev, matchptr, compare_of, node);
> +		component_match_add_of(dev, matchptr, node);
> +		of_node_put(node);
>  	}
>  
>  	return 0;
> diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h
> index 5b2963f32291..66dafecaf115 100644
> --- a/drivers/gpu/drm/msm/msm_drv.h
> +++ b/drivers/gpu/drm/msm/msm_drv.h
> @@ -30,6 +30,7 @@
>  #include <linux/list.h>
>  #include <linux/iommu.h>
>  #include <linux/types.h>
> +#include <linux/of_component.h>
>  #include <linux/of_graph.h>
>  #include <linux/of_device.h>
>  #include <asm/sizes.h>
> diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
> index a409d1f703cb..84c50f6770c3 100644
> --- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
> +++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
> @@ -22,6 +22,7 @@
>  #include <linux/dma-mapping.h>
>  #include <linux/pm_runtime.h>
>  #include <linux/module.h>
> +#include <linux/of_component.h>
>  #include <linux/of_graph.h>
>  #include <linux/component.h>
>  
> @@ -414,13 +415,6 @@ static const struct dev_pm_ops rockchip_drm_pm_ops = {
>  				rockchip_drm_sys_resume)
>  };
>  
> -static int compare_of(struct device *dev, void *data)
> -{
> -	struct device_node *np = data;
> -
> -	return dev->of_node == np;
> -}
> -
>  static void rockchip_add_endpoints(struct device *dev,
>  				   struct component_match **match,
>  				   struct device_node *port)
> @@ -439,7 +433,7 @@ static void rockchip_add_endpoints(struct device *dev,
>  			continue;
>  		}
>  
> -		component_match_add(dev, match, compare_of, remote);
> +		component_match_add_of(dev, match, remote);
>  		of_node_put(remote);
>  	}
>  }
> @@ -518,7 +512,7 @@ static int rockchip_drm_platform_probe(struct platform_device *pdev)
>  			is_support_iommu = false;
>  		}
>  
> -		component_match_add(dev, &match, compare_of, port->parent);
> +		component_match_add_of(dev, &match, port->parent);
>  		of_node_put(port);
>  	}
>  
> diff --git a/drivers/gpu/drm/sti/sti_drv.c b/drivers/gpu/drm/sti/sti_drv.c
> index 872495e72294..aeb2787c9bd4 100644
> --- a/drivers/gpu/drm/sti/sti_drv.c
> +++ b/drivers/gpu/drm/sti/sti_drv.c
> @@ -10,6 +10,7 @@
>  #include <linux/debugfs.h>
>  #include <linux/kernel.h>
>  #include <linux/module.h>
> +#include <linux/of_component.h>
>  #include <linux/of_platform.h>
>  
>  #include <drm/drm_atomic.h>
> @@ -341,11 +342,6 @@ static struct drm_driver sti_driver = {
>  	.minor = DRIVER_MINOR,
>  };
>  
> -static int compare_of(struct device *dev, void *data)
> -{
> -	return dev->of_node == data;
> -}
> -
>  static int sti_bind(struct device *dev)
>  {
>  	return drm_platform_init(&sti_driver, to_platform_device(dev));
> @@ -375,8 +371,7 @@ static int sti_platform_probe(struct platform_device *pdev)
>  	child_np = of_get_next_available_child(node, NULL);
>  
>  	while (child_np) {
> -		component_match_add(dev, &match, compare_of, child_np);
> -		of_node_put(child_np);
> +		component_match_add_of(dev, &match, child_np);
>  		child_np = of_get_next_available_child(node, child_np);
>  	}
>  
> diff --git a/drivers/gpu/drm/tilcdc/tilcdc_external.c b/drivers/gpu/drm/tilcdc/tilcdc_external.c
> index 03acb4f99982..1b3fd9fa4bef 100644
> --- a/drivers/gpu/drm/tilcdc/tilcdc_external.c
> +++ b/drivers/gpu/drm/tilcdc/tilcdc_external.c
> @@ -9,6 +9,7 @@
>   */
>  
>  #include <linux/component.h>
> +#include <linux/of_component.h>
>  #include <linux/of_graph.h>
>  
>  #include "tilcdc_drv.h"
> @@ -130,11 +131,6 @@ void tilcdc_remove_external_encoders(struct drm_device *dev)
>  						 priv->connector_funcs[i]);
>  }
>  
> -static int dev_match_of(struct device *dev, void *data)
> -{
> -	return dev->of_node == data;
> -}
> -
>  int tilcdc_get_external_components(struct device *dev,
>  				   struct component_match **match)
>  {
> @@ -152,7 +148,7 @@ int tilcdc_get_external_components(struct device *dev,
>  
>  		dev_dbg(dev, "Subdevice node '%s' found\n", node->name);
>  		if (match)
> -			component_match_add(dev, match, dev_match_of, node);
> +			component_match_add_of(dev, match, node);
>  		of_node_put(node);
>  		count++;
>  	}
> -- 
> 2.1.0
> 

-- 
====================
| I would like to |
| fix the world,  |
| but they're not |
| giving me the   |
 \ source code!  /
  ---------------
    ¯\_(ツ)_/¯
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Re: [PATCH v2 2/3] drm: convert DT component matching to component_match_add_release()

[Vincent ABRIOU]

On 06/03/2016 04:21 PM, Russell King wrote:
> Convert DT component matching to use component_match_add_release().
>
> Signed-off-by: Russell King <rmk+kernel-I+IVW8TIWO2tmTQ+vhA3Yw@public.gmane.org>
> ---
>   drivers/gpu/drm/arm/hdlcd_drv.c             |  9 +++------
>   drivers/gpu/drm/armada/armada_drv.c         |  8 ++------
>   drivers/gpu/drm/drm_of.c                    |  6 ++++--
>   drivers/gpu/drm/etnaviv/etnaviv_drv.c       | 11 ++---------
>   drivers/gpu/drm/msm/msm_drv.c               |  8 ++------
>   drivers/gpu/drm/msm/msm_drv.h               |  1 +
>   drivers/gpu/drm/rockchip/rockchip_drm_drv.c | 12 +++---------
>   drivers/gpu/drm/sti/sti_drv.c               |  9 ++-------
>   drivers/gpu/drm/tilcdc/tilcdc_external.c    |  8 ++------
>   9 files changed, 21 insertions(+), 51 deletions(-)
>
>
> diff --git a/drivers/gpu/drm/sti/sti_drv.c b/drivers/gpu/drm/sti/sti_drv.c
> index 872495e72294..aeb2787c9bd4 100644
> --- a/drivers/gpu/drm/sti/sti_drv.c
> +++ b/drivers/gpu/drm/sti/sti_drv.c
> @@ -10,6 +10,7 @@
>   #include <linux/debugfs.h>
>   #include <linux/kernel.h>
>   #include <linux/module.h>
> +#include <linux/of_component.h>
>   #include <linux/of_platform.h>
>
>   #include <drm/drm_atomic.h>
> @@ -341,11 +342,6 @@ static struct drm_driver sti_driver = {
>   	.minor = DRIVER_MINOR,
>   };
>
> -static int compare_of(struct device *dev, void *data)
> -{
> -	return dev->of_node == data;
> -}
> -
>   static int sti_bind(struct device *dev)
>   {
>   	return drm_platform_init(&sti_driver, to_platform_device(dev));
> @@ -375,8 +371,7 @@ static int sti_platform_probe(struct platform_device *pdev)
>   	child_np = of_get_next_available_child(node, NULL);
>
>   	while (child_np) {
> -		component_match_add(dev, &match, compare_of, child_np);
> -		of_node_put(child_np);
> +		component_match_add_of(dev, &match, child_np);
>   		child_np = of_get_next_available_child(node, child_np);
>   	}
>

Hi Russel,

Ok for the sti driver.

Acked-by: Vincent Abriou <vincent.abriou-qxv4g6HH51o@public.gmane.org>

[PATCH v2 3/3] iommu: convert DT component matching to component_match_add_release()

[Russell King]

Convert DT component matching to use component_match_add_release().

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
---
 drivers/iommu/mtk_iommu.c | 14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)

diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
index c3043d8754e3..71cf62af4e24 100644
--- a/drivers/iommu/mtk_iommu.c
+++ b/drivers/iommu/mtk_iommu.c
@@ -24,6 +24,7 @@
 #include <linux/iopoll.h>
 #include <linux/list.h>
 #include <linux/of_address.h>
+#include <linux/of_component.h>
 #include <linux/of_iommu.h>
 #include <linux/of_irq.h>
 #include <linux/of_platform.h>
@@ -552,11 +553,6 @@ static int mtk_iommu_hw_init(const struct mtk_iommu_data *data)
 	return 0;
 }
 
-static int compare_of(struct device *dev, void *data)
-{
-	return dev->of_node == data;
-}
-
 static int mtk_iommu_bind(struct device *dev)
 {
 	struct mtk_iommu_data *data = dev_get_drvdata(dev);
@@ -630,17 +626,19 @@ static int mtk_iommu_probe(struct platform_device *pdev)
 			continue;
 
 		plarbdev = of_find_device_by_node(larbnode);
-		of_node_put(larbnode);
 		if (!plarbdev) {
 			plarbdev = of_platform_device_create(
 						larbnode, NULL,
 						platform_bus_type.dev_root);
-			if (!plarbdev)
+			if (!plarbdev) {
+				of_node_put(larbnode);
 				return -EPROBE_DEFER;
+			}
 		}
 		data->smi_imu.larb_imu[i].dev = &plarbdev->dev;
 
-		component_match_add(dev, &match, compare_of, larbnode);
+		component_match_add_of(dev, &match, larbnode);
+		of_node_put(larbnode);
 	}
 
 	platform_set_drvdata(pdev, data);
-- 
2.1.0

Re: [PATCH v2 3/3] iommu: convert DT component matching to component_match_add_release()

[Matthias Brugger]

On 03/06/16 16:21, Russell King wrote:
> Convert DT component matching to use component_match_add_release().
>
> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>


Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>

> ---
>   drivers/iommu/mtk_iommu.c | 14 ++++++--------
>   1 file changed, 6 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
> index c3043d8754e3..71cf62af4e24 100644
> --- a/drivers/iommu/mtk_iommu.c
> +++ b/drivers/iommu/mtk_iommu.c
> @@ -24,6 +24,7 @@
>   #include <linux/iopoll.h>
>   #include <linux/list.h>
>   #include <linux/of_address.h>
> +#include <linux/of_component.h>
>   #include <linux/of_iommu.h>
>   #include <linux/of_irq.h>
>   #include <linux/of_platform.h>
> @@ -552,11 +553,6 @@ static int mtk_iommu_hw_init(const struct mtk_iommu_data *data)
>   	return 0;
>   }
>
> -static int compare_of(struct device *dev, void *data)
> -{
> -	return dev->of_node == data;
> -}
> -
>   static int mtk_iommu_bind(struct device *dev)
>   {
>   	struct mtk_iommu_data *data = dev_get_drvdata(dev);
> @@ -630,17 +626,19 @@ static int mtk_iommu_probe(struct platform_device *pdev)
>   			continue;
>
>   		plarbdev = of_find_device_by_node(larbnode);
> -		of_node_put(larbnode);
>   		if (!plarbdev) {
>   			plarbdev = of_platform_device_create(
>   						larbnode, NULL,
>   						platform_bus_type.dev_root);
> -			if (!plarbdev)
> +			if (!plarbdev) {
> +				of_node_put(larbnode);
>   				return -EPROBE_DEFER;
> +			}
>   		}
>   		data->smi_imu.larb_imu[i].dev = &plarbdev->dev;
>
> -		component_match_add(dev, &match, compare_of, larbnode);
> +		component_match_add_of(dev, &match, larbnode);
> +		of_node_put(larbnode);
>   	}
>
>   	platform_set_drvdata(pdev, data);
>

Re: [PATCH v2 3/3] iommu: convert DT component matching to component_match_add_release()

[Joerg Roedel]

On Fri, Jun 03, 2016 at 03:21:30PM +0100, Russell King wrote:
> Convert DT component matching to use component_match_add_release().
> 
> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
> ---
>  drivers/iommu/mtk_iommu.c | 14 ++++++--------
>  1 file changed, 6 insertions(+), 8 deletions(-)

Applied, thanks.