This patch makes the driver instantiating its child devices itself, rather than relying on an OS to instantiate devices as children of "simple-bus". This removes an incorrect usage of "simple-bus" compatible. Signed-off-by: Sylwester Nawrocki <s.nawrocki@xxxxxxxxxxx> Acked-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx> --- This patch addresses Mark's review comments: https://patchwork.linuxtv.org/patch/23008/ --- .../devicetree/bindings/media/samsung-fimc.txt | 6 +-- drivers/media/platform/exynos4-is/common.c | 47 +++++++++++++++++++- drivers/media/platform/exynos4-is/common.h | 6 ++- drivers/media/platform/exynos4-is/fimc-is.c | 12 ++++- drivers/media/platform/exynos4-is/media-dev.c | 33 ++++++++++---- 5 files changed, 89 insertions(+), 15 deletions(-) diff --git a/Documentation/devicetree/bindings/media/samsung-fimc.txt b/Documentation/devicetree/bindings/media/samsung-fimc.txt index 922d6f8..8ce5984 100644 --- a/Documentation/devicetree/bindings/media/samsung-fimc.txt +++ b/Documentation/devicetree/bindings/media/samsung-fimc.txt @@ -15,9 +15,9 @@ Common 'camera' node Required properties: -- compatible: must be "samsung,fimc", "simple-bus" +- compatible: should be "samsung,fimc", - clocks: list of clock specifiers, corresponding to entries in - the clock-names property; + the clock-names property, - clock-names : must contain "sclk_cam0", "sclk_cam1", "pxl_async0", "pxl_async1" entries, matching entries in the clocks property. @@ -157,7 +157,7 @@ Example: }; camera { - compatible = "samsung,fimc", "simple-bus"; + compatible = "samsung,fimc"; clocks = <&clock 132>, <&clock 133>, <&clock 351>, <&clock 352>; clock-names = "sclk_cam0", "sclk_cam1", "pxl_async0", diff --git a/drivers/media/platform/exynos4-is/common.c b/drivers/media/platform/exynos4-is/common.c index 0eb34ec..1e50a48 100644 --- a/drivers/media/platform/exynos4-is/common.c +++ b/drivers/media/platform/exynos4-is/common.c @@ -1,7 +1,7 @@ /* * Samsung S5P/EXYNOS4 SoC Camera Subsystem driver * - * Copyright (C) 2013 Samsung Electronics Co., Ltd. + * Copyright (C) 2013 - 2014 Samsung Electronics Co., Ltd. * Author: Sylwester Nawrocki <s.nawrocki@xxxxxxxxxxx> * * This program is free software; you can redistribute it and/or modify @@ -11,6 +11,7 @@ #include <linux/module.h> #include <media/exynos-fimc.h> +#include <linux/of_device.h> #include "common.h" /* Called with the media graph mutex held or entity->stream_count > 0. */ @@ -50,4 +51,48 @@ void __fimc_vidioc_querycap(struct device *dev, struct v4l2_capability *cap, } EXPORT_SYMBOL(__fimc_vidioc_querycap); +static int __remove_child_device(struct device *dev, void *unused) +{ + of_device_unregister(to_platform_device(dev)); + return 0; +} + +void fimc_unregister_child_devices(struct device *parent) +{ + device_for_each_child(parent, NULL, __remove_child_device); +} +EXPORT_SYMBOL(fimc_unregister_child_devices); + +struct platform_device *fimc_register_child_device(struct device_node *child, + struct device *parent) +{ + struct platform_device *pdev; + + pdev = of_platform_device_create(child, NULL, parent); + if (!pdev) + dev_err(parent, + "failed to create device for node %s\n", + child->full_name); + return pdev; +} +EXPORT_SYMBOL(fimc_register_child_device); + +int fimc_register_child_devices(struct device *parent) +{ + struct platform_device *pdev; + struct device_node *child; + + for_each_available_child_of_node(parent->of_node, child) { + pdev = fimc_register_child_device(child, parent); + if (!pdev) { + of_node_put(child); + fimc_unregister_child_devices(parent); + return -ENXIO; + } + + } + return 0; +} +EXPORT_SYMBOL(fimc_register_child_devices); + MODULE_LICENSE("GPL"); diff --git a/drivers/media/platform/exynos4-is/common.h b/drivers/media/platform/exynos4-is/common.h index 75b9c71..1d06715 100644 --- a/drivers/media/platform/exynos4-is/common.h +++ b/drivers/media/platform/exynos4-is/common.h @@ -1,5 +1,5 @@ /* - * Copyright (C) 2013 Samsung Electronics Co., Ltd. + * Copyright (C) 2013 - 2014 Samsung Electronics Co., Ltd. * * 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 @@ -14,3 +14,7 @@ struct v4l2_subdev *fimc_find_remote_sensor(struct media_entity *entity); void __fimc_vidioc_querycap(struct device *dev, struct v4l2_capability *cap, unsigned int caps); +struct platform_device *fimc_register_child_device(struct device_node *child, + struct device *parent); +int fimc_register_child_devices(struct device *parent); +void fimc_unregister_child_devices(struct device *parent); diff --git a/drivers/media/platform/exynos4-is/fimc-is.c b/drivers/media/platform/exynos4-is/fimc-is.c index a875090..05eab0f 100644 --- a/drivers/media/platform/exynos4-is/fimc-is.c +++ b/drivers/media/platform/exynos4-is/fimc-is.c @@ -33,6 +33,7 @@ #include <linux/videodev2.h> #include <media/videobuf2-dma-contig.h> +#include "common.h" #include "media-dev.h" #include "fimc-is.h" #include "fimc-is-command.h" @@ -201,6 +202,13 @@ static int fimc_is_register_subdevs(struct fimc_is *is) struct device_node *i2c_bus, *child; int ret, index = 0; + /* Create child devices (FIMC-LITE, I2C...) */ + if (!of_device_is_compatible(is->pdev->dev.of_node, "simple-bus")) { + ret = fimc_register_child_devices(&is->pdev->dev); + if (ret < 0) + return ret; + } + ret = fimc_isp_subdev_create(&is->isp); if (ret < 0) return ret; @@ -222,10 +230,10 @@ static int fimc_is_register_subdevs(struct fimc_is *is) return 0; } -static int fimc_is_unregister_subdevs(struct fimc_is *is) +static void fimc_is_unregister_subdevs(struct fimc_is *is) { fimc_isp_subdev_destroy(&is->isp); - return 0; + fimc_unregister_child_devices(&is->pdev->dev); } static int fimc_is_load_setfile(struct fimc_is *is, char *file_name) diff --git a/drivers/media/platform/exynos4-is/media-dev.c b/drivers/media/platform/exynos4-is/media-dev.c index 0b64ec8..975063c 100644 --- a/drivers/media/platform/exynos4-is/media-dev.c +++ b/drivers/media/platform/exynos4-is/media-dev.c @@ -33,6 +33,7 @@ #include <media/media-device.h> #include <media/exynos-fimc.h> +#include "common.h" #include "media-dev.h" #include "fimc-core.h" #include "fimc-is.h" @@ -625,19 +626,28 @@ dev_unlock: } /* Register FIMC, FIMC-LITE and CSIS media entities */ -static int fimc_md_register_platform_entities(struct fimc_md *fmd, - struct device_node *parent) +static int fimc_md_register_platform_entities(struct fimc_md *fmd) { + struct device *parent = &fmd->pdev->dev; + bool create_devices = !of_device_is_compatible(parent->of_node, + "simple-bus"); struct device_node *node; int ret = 0; - for_each_available_child_of_node(parent, node) { + for_each_available_child_of_node(parent->of_node, node) { struct platform_device *pdev; int plat_entity = -1; - pdev = of_find_device_by_node(node); - if (!pdev) - continue; + if (create_devices) { + pdev = fimc_register_child_device(node, parent); + if (!pdev) + return -ENXIO; + } else { + /* For backward compatibility with old dtb only */ + pdev = of_find_device_by_node(node); + if (!pdev) + continue; + } /* If driver of any entity isn't ready try all again later. */ if (!strcmp(node->name, CSIS_OF_NODE_NAME)) @@ -653,7 +663,9 @@ static int fimc_md_register_platform_entities(struct fimc_md *fmd, if (plat_entity >= 0) ret = fimc_md_register_platform_entity(fmd, pdev, plat_entity); - put_device(&pdev->dev); + if (!create_devices) + put_device(&pdev->dev); + if (ret < 0) break; } @@ -690,6 +702,11 @@ static void fimc_md_unregister_entities(struct fimc_md *fmd) if (fmd->fimc_is) v4l2_device_unregister_subdev(&fmd->fimc_is->isp.subdev); + /* + * Free any registered devices corresponding to the camera node + * child nodes. + */ + fimc_unregister_child_devices(&fmd->pdev->dev); v4l2_info(&fmd->v4l2_dev, "Unregistered all entities\n"); } @@ -1374,7 +1391,7 @@ static int fimc_md_probe(struct platform_device *pdev) /* Protect the media graph while we're registering entities */ mutex_lock(&fmd->media_dev.graph_mutex); - ret = fimc_md_register_platform_entities(fmd, dev->of_node); + ret = fimc_md_register_platform_entities(fmd); if (ret) { mutex_unlock(&fmd->media_dev.graph_mutex); goto err_clk; -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
