Re: [PATCH v11 1/6] media: atmel: atmel-isc: move to staging

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On 11/4/22 11:26, Hans Verkuil wrote:
> Hi Eugen,
> 
> On 02/11/2022 14:14, Eugen Hristev wrote:
>> The Atmel ISC driver is not compliant with media controller specification.
>> In order to evolve this driver, it has to move to media controller, to
>> support enhanced features and future products which embed it.
>> The move to media controller involves several changes which are
>> not backwards compatible with the current usability of the driver.
>>
>> The best example is the way the format is propagated from the top video
>> driver /dev/videoX down to the sensor.
>>
>> In a simple configuration sensor ==> isc , the isc just calls subdev s_fmt
>> and controls the sensor directly. This is achieved by having a lot of code
>> inside the driver that will query the subdev at probe time and make a list
>> of formats which are usable.
>> Basically the user has nothing to configure, as the isc will handle
>> everything at the top level. This is an easy way to capture, but also comes
>> with the drawback of lack of flexibility.
>> In a more complicated pipeline
>> sensor ==> controller 1 ==> controller 2 ==> isc
>> this will not be achievable, as controller 1 and controller 2 might be
>> media-controller configurable, and will not propagate the formats down to
>> the sensor.
>>
>> After discussions with the media maintainers, the decision is to move
>> Atmel ISC to staging as-is, to keep the Kconfig symbols and the users
>> to the driver in staging. Thus, all the existing users of the non
>> media-controller paradigm will continue to be happy and use the old config
>> way.
>>
>> The next step is to readd the driver in the media subsystem with a different
>> symbol, with the conversion to media controller done, and new users
>> of the driver will be able to use all the new features.
>>
>> This patch is merely a file move to staging, not affecting any of the users.
>>
>> The exported symbols had to be renamed to atmel_* to avoid duplication when
>> the future Microchip ISC driver will be added to media subsystem.
>>
>> Signed-off-by: Eugen Hristev <eugen.hristev@xxxxxxxxxxxxx>
>> ---
>>   MAINTAINERS                                   |  4 +-
>>   drivers/media/platform/atmel/Kconfig          | 36 -----------------
>>   drivers/media/platform/atmel/Makefile         |  6 ---
>>   drivers/staging/media/Kconfig                 |  2 +
>>   drivers/staging/media/Makefile                |  1 +
>>   drivers/staging/media/atmel/Kconfig           | 40 +++++++++++++++++++
>>   drivers/staging/media/atmel/Makefile          |  8 ++++
>>   .../media}/atmel/atmel-isc-base.c             | 20 +++++-----
>>   .../media}/atmel/atmel-isc-clk.c              |  8 ++--
>>   .../media}/atmel/atmel-isc-regs.h             |  0
>>   .../media}/atmel/atmel-isc.h                  | 16 ++++----
>>   .../media}/atmel/atmel-sama5d2-isc.c          | 18 ++++-----
>>   .../media}/atmel/atmel-sama7g5-isc.c          | 18 ++++-----
>>   13 files changed, 93 insertions(+), 84 deletions(-)
>>   create mode 100644 drivers/staging/media/atmel/Kconfig
>>   create mode 100644 drivers/staging/media/atmel/Makefile
>>   rename drivers/{media/platform => staging/media}/atmel/atmel-isc-base.c (99%)
>>   rename drivers/{media/platform => staging/media}/atmel/atmel-isc-clk.c (97%)
>>   rename drivers/{media/platform => staging/media}/atmel/atmel-isc-regs.h (100%)
>>   rename drivers/{media/platform => staging/media}/atmel/atmel-isc.h (96%)
>>   rename drivers/{media/platform => staging/media}/atmel/atmel-sama5d2-isc.c (97%)
>>   rename drivers/{media/platform => staging/media}/atmel/atmel-sama7g5-isc.c (97%)
> 
> A new 'deprecated' directory was created for drivers that are marked
> as deprecated (like this one). Please update this patch for that.
> 
> Also add a TODO file explaining why it is deprecated, what replaces
> it, and when it will be removed (I would set that to 2-3 years in
> the future).
> 
> The Kconfig should also be updated to prevent building this deprecated
> driver if the new driver is selected, unless COMPILE_TEST is also set.
> 
> To be honest, I wonder if it wouldn't be better to do the move to
> staging as the last patch of the series. It's more logical in the
> patch sequence.

Hi Hans,

I had the feeling to do this as first patch, because it would be strange 
for me to first add a second driver with a different name that would 
duplicate much of the code, and after that move this driver to staging.
But if you feel it's better like that, I can definitely reorder them, it 
will need a few changes in the commit messages, but no worries about that.
I have built both drivers in the same time and had no issues. I only had 
to rename the exported symbols in the old driver with a prefix. I think 
it's a good approach to not duplicate in any way exported symbols.

Thanks for having a look,
Eugen

> 
> Regards,
> 
>          Hans
> 
>>
>> diff --git a/MAINTAINERS b/MAINTAINERS
>> index 307775bfbf99..8b28d8d4c55e 100644
>> --- a/MAINTAINERS
>> +++ b/MAINTAINERS
>> @@ -13488,8 +13488,8 @@ L:    linux-media@xxxxxxxxxxxxxxx
>>   S:   Supported
>>   F:   Documentation/devicetree/bindings/media/atmel,isc.yaml
>>   F:   Documentation/devicetree/bindings/media/microchip,xisc.yaml
>> -F:   drivers/media/platform/atmel/atmel-isc*
>> -F:   drivers/media/platform/atmel/atmel-sama*-isc*
>> +F:   drivers/staging/media/atmel/atmel-isc*
>> +F:   drivers/staging/media/atmel/atmel-sama*-isc*
>>   F:   include/linux/atmel-isc-media.h
>>
>>   MICROCHIP ISI DRIVER
>> diff --git a/drivers/media/platform/atmel/Kconfig b/drivers/media/platform/atmel/Kconfig
>> index f399dba62e17..f438a98542e8 100644
>> --- a/drivers/media/platform/atmel/Kconfig
>> +++ b/drivers/media/platform/atmel/Kconfig
>> @@ -2,42 +2,6 @@
>>
>>   comment "Atmel media platform drivers"
>>
>> -config VIDEO_ATMEL_ISC
>> -     tristate "ATMEL Image Sensor Controller (ISC) support"
>> -     depends on V4L_PLATFORM_DRIVERS
>> -     depends on VIDEO_DEV && COMMON_CLK
>> -     depends on ARCH_AT91 || COMPILE_TEST
>> -     select MEDIA_CONTROLLER
>> -     select VIDEO_V4L2_SUBDEV_API
>> -     select VIDEOBUF2_DMA_CONTIG
>> -     select REGMAP_MMIO
>> -     select V4L2_FWNODE
>> -     select VIDEO_ATMEL_ISC_BASE
>> -     help
>> -        This module makes the ATMEL Image Sensor Controller available
>> -        as a v4l2 device.
>> -
>> -config VIDEO_ATMEL_XISC
>> -     tristate "ATMEL eXtended Image Sensor Controller (XISC) support"
>> -     depends on V4L_PLATFORM_DRIVERS
>> -     depends on VIDEO_DEV && COMMON_CLK
>> -     depends on ARCH_AT91 || COMPILE_TEST
>> -     select VIDEOBUF2_DMA_CONTIG
>> -     select REGMAP_MMIO
>> -     select V4L2_FWNODE
>> -     select VIDEO_ATMEL_ISC_BASE
>> -     select MEDIA_CONTROLLER
>> -     select VIDEO_V4L2_SUBDEV_API
>> -     help
>> -        This module makes the ATMEL eXtended Image Sensor Controller
>> -        available as a v4l2 device.
>> -
>> -config VIDEO_ATMEL_ISC_BASE
>> -     tristate
>> -     default n
>> -     help
>> -       ATMEL ISC and XISC common code base.
>> -
>>   config VIDEO_ATMEL_ISI
>>        tristate "ATMEL Image Sensor Interface (ISI) support"
>>        depends on V4L_PLATFORM_DRIVERS
>> diff --git a/drivers/media/platform/atmel/Makefile b/drivers/media/platform/atmel/Makefile
>> index 794e8f739287..86f77030e6e2 100644
>> --- a/drivers/media/platform/atmel/Makefile
>> +++ b/drivers/media/platform/atmel/Makefile
>> @@ -1,10 +1,4 @@
>>   # SPDX-License-Identifier: GPL-2.0-only
>> -atmel-isc-objs = atmel-sama5d2-isc.o
>> -atmel-xisc-objs = atmel-sama7g5-isc.o
>> -atmel-isc-common-objs = atmel-isc-base.o atmel-isc-clk.o
>>
>>   obj-$(CONFIG_VIDEO_ATMEL_ISI) += atmel-isi.o
>> -obj-$(CONFIG_VIDEO_ATMEL_ISC_BASE) += atmel-isc-common.o
>> -obj-$(CONFIG_VIDEO_ATMEL_ISC) += atmel-isc.o
>> -obj-$(CONFIG_VIDEO_ATMEL_XISC) += atmel-xisc.o
>>   obj-$(CONFIG_VIDEO_MICROCHIP_CSI2DC) += microchip-csi2dc.o
>> diff --git a/drivers/staging/media/Kconfig b/drivers/staging/media/Kconfig
>> index d4f03b203ae5..072fab838374 100644
>> --- a/drivers/staging/media/Kconfig
>> +++ b/drivers/staging/media/Kconfig
>> @@ -20,6 +20,8 @@ menuconfig STAGING_MEDIA
>>   if STAGING_MEDIA && MEDIA_SUPPORT
>>
>>   # Please keep them in alphabetic order
>> +source "drivers/staging/media/atmel/Kconfig"
>> +
>>   source "drivers/staging/media/atomisp/Kconfig"
>>
>>   source "drivers/staging/media/imx/Kconfig"
>> diff --git a/drivers/staging/media/Makefile b/drivers/staging/media/Makefile
>> index a387692b84f2..dbfeb03ea41f 100644
>> --- a/drivers/staging/media/Makefile
>> +++ b/drivers/staging/media/Makefile
>> @@ -1,4 +1,5 @@
>>   # SPDX-License-Identifier: GPL-2.0
>> +obj-$(CONFIG_VIDEO_ATMEL_ISC_BASE)   += atmel/
>>   obj-$(CONFIG_INTEL_ATOMISP)     += atomisp/
>>   obj-$(CONFIG_VIDEO_CPIA2)    += deprecated/cpia2/
>>   obj-$(CONFIG_VIDEO_IMX_MEDIA)        += imx/
>> diff --git a/drivers/staging/media/atmel/Kconfig b/drivers/staging/media/atmel/Kconfig
>> new file mode 100644
>> index 000000000000..73cef959f236
>> --- /dev/null
>> +++ b/drivers/staging/media/atmel/Kconfig
>> @@ -0,0 +1,40 @@
>> +# SPDX-License-Identifier: GPL-2.0-only
>> +
>> +comment "Atmel media platform drivers"
>> +
>> +config VIDEO_ATMEL_ISC
>> +     tristate "ATMEL Image Sensor Controller (ISC) support"
>> +     depends on V4L_PLATFORM_DRIVERS
>> +     depends on VIDEO_DEV && COMMON_CLK
>> +     depends on ARCH_AT91 || COMPILE_TEST
>> +     select MEDIA_CONTROLLER
>> +     select VIDEO_V4L2_SUBDEV_API
>> +     select VIDEOBUF2_DMA_CONTIG
>> +     select REGMAP_MMIO
>> +     select V4L2_FWNODE
>> +     select VIDEO_ATMEL_ISC_BASE
>> +     help
>> +        This module makes the ATMEL Image Sensor Controller available
>> +        as a v4l2 device.
>> +
>> +config VIDEO_ATMEL_XISC
>> +     tristate "ATMEL eXtended Image Sensor Controller (XISC) support"
>> +     depends on V4L_PLATFORM_DRIVERS
>> +     depends on VIDEO_DEV && COMMON_CLK
>> +     depends on ARCH_AT91 || COMPILE_TEST
>> +     select VIDEOBUF2_DMA_CONTIG
>> +     select REGMAP_MMIO
>> +     select V4L2_FWNODE
>> +     select VIDEO_ATMEL_ISC_BASE
>> +     select MEDIA_CONTROLLER
>> +     select VIDEO_V4L2_SUBDEV_API
>> +     help
>> +        This module makes the ATMEL eXtended Image Sensor Controller
>> +        available as a v4l2 device.
>> +
>> +config VIDEO_ATMEL_ISC_BASE
>> +     tristate
>> +     default n
>> +     help
>> +       ATMEL ISC and XISC common code base.
>> +
>> diff --git a/drivers/staging/media/atmel/Makefile b/drivers/staging/media/atmel/Makefile
>> new file mode 100644
>> index 000000000000..34eaeeac5bba
>> --- /dev/null
>> +++ b/drivers/staging/media/atmel/Makefile
>> @@ -0,0 +1,8 @@
>> +# SPDX-License-Identifier: GPL-2.0-only
>> +atmel-isc-objs = atmel-sama5d2-isc.o
>> +atmel-xisc-objs = atmel-sama7g5-isc.o
>> +atmel-isc-common-objs = atmel-isc-base.o atmel-isc-clk.o
>> +
>> +obj-$(CONFIG_VIDEO_ATMEL_ISC_BASE) += atmel-isc-common.o
>> +obj-$(CONFIG_VIDEO_ATMEL_ISC) += atmel-isc.o
>> +obj-$(CONFIG_VIDEO_ATMEL_XISC) += atmel-xisc.o
>> diff --git a/drivers/media/platform/atmel/atmel-isc-base.c b/drivers/staging/media/atmel/atmel-isc-base.c
>> similarity index 99%
>> rename from drivers/media/platform/atmel/atmel-isc-base.c
>> rename to drivers/staging/media/atmel/atmel-isc-base.c
>> index 9e5317a7d516..99e61bbfc9bc 100644
>> --- a/drivers/media/platform/atmel/atmel-isc-base.c
>> +++ b/drivers/staging/media/atmel/atmel-isc-base.c
>> @@ -1221,7 +1221,7 @@ static const struct v4l2_file_operations isc_fops = {
>>        .poll           = vb2_fop_poll,
>>   };
>>
>> -irqreturn_t isc_interrupt(int irq, void *dev_id)
>> +irqreturn_t atmel_isc_interrupt(int irq, void *dev_id)
>>   {
>>        struct isc_device *isc = (struct isc_device *)dev_id;
>>        struct regmap *regmap = isc->regmap;
>> @@ -1267,7 +1267,7 @@ irqreturn_t isc_interrupt(int irq, void *dev_id)
>>
>>        return ret;
>>   }
>> -EXPORT_SYMBOL_GPL(isc_interrupt);
>> +EXPORT_SYMBOL_GPL(atmel_isc_interrupt);
>>
>>   static void isc_hist_count(struct isc_device *isc, u32 *min, u32 *max)
>>   {
>> @@ -1934,14 +1934,14 @@ static int isc_async_complete(struct v4l2_async_notifier *notifier)
>>        return ret;
>>   }
>>
>> -const struct v4l2_async_notifier_operations isc_async_ops = {
>> +const struct v4l2_async_notifier_operations atmel_isc_async_ops = {
>>        .bound = isc_async_bound,
>>        .unbind = isc_async_unbind,
>>        .complete = isc_async_complete,
>>   };
>> -EXPORT_SYMBOL_GPL(isc_async_ops);
>> +EXPORT_SYMBOL_GPL(atmel_isc_async_ops);
>>
>> -void isc_subdev_cleanup(struct isc_device *isc)
>> +void atmel_isc_subdev_cleanup(struct isc_device *isc)
>>   {
>>        struct isc_subdev_entity *subdev_entity;
>>
>> @@ -1952,9 +1952,9 @@ void isc_subdev_cleanup(struct isc_device *isc)
>>
>>        INIT_LIST_HEAD(&isc->subdev_entities);
>>   }
>> -EXPORT_SYMBOL_GPL(isc_subdev_cleanup);
>> +EXPORT_SYMBOL_GPL(atmel_isc_subdev_cleanup);
>>
>> -int isc_pipeline_init(struct isc_device *isc)
>> +int atmel_isc_pipeline_init(struct isc_device *isc)
>>   {
>>        struct device *dev = isc->dev;
>>        struct regmap *regmap = isc->regmap;
>> @@ -1993,17 +1993,17 @@ int isc_pipeline_init(struct isc_device *isc)
>>
>>        return 0;
>>   }
>> -EXPORT_SYMBOL_GPL(isc_pipeline_init);
>> +EXPORT_SYMBOL_GPL(atmel_isc_pipeline_init);
>>
>>   /* regmap configuration */
>>   #define ATMEL_ISC_REG_MAX    0xd5c
>> -const struct regmap_config isc_regmap_config = {
>> +const struct regmap_config atmel_isc_regmap_config = {
>>        .reg_bits       = 32,
>>        .reg_stride     = 4,
>>        .val_bits       = 32,
>>        .max_register   = ATMEL_ISC_REG_MAX,
>>   };
>> -EXPORT_SYMBOL_GPL(isc_regmap_config);
>> +EXPORT_SYMBOL_GPL(atmel_isc_regmap_config);
>>
>>   MODULE_AUTHOR("Songjun Wu");
>>   MODULE_AUTHOR("Eugen Hristev");
>> diff --git a/drivers/media/platform/atmel/atmel-isc-clk.c b/drivers/staging/media/atmel/atmel-isc-clk.c
>> similarity index 97%
>> rename from drivers/media/platform/atmel/atmel-isc-clk.c
>> rename to drivers/staging/media/atmel/atmel-isc-clk.c
>> index 2059fe376b00..d442b5f4c931 100644
>> --- a/drivers/media/platform/atmel/atmel-isc-clk.c
>> +++ b/drivers/staging/media/atmel/atmel-isc-clk.c
>> @@ -277,7 +277,7 @@ static int isc_clk_register(struct isc_device *isc, unsigned int id)
>>        return 0;
>>   }
>>
>> -int isc_clk_init(struct isc_device *isc)
>> +int atmel_isc_clk_init(struct isc_device *isc)
>>   {
>>        unsigned int i;
>>        int ret;
>> @@ -293,9 +293,9 @@ int isc_clk_init(struct isc_device *isc)
>>
>>        return 0;
>>   }
>> -EXPORT_SYMBOL_GPL(isc_clk_init);
>> +EXPORT_SYMBOL_GPL(atmel_isc_clk_init);
>>
>> -void isc_clk_cleanup(struct isc_device *isc)
>> +void atmel_isc_clk_cleanup(struct isc_device *isc)
>>   {
>>        unsigned int i;
>>
>> @@ -308,4 +308,4 @@ void isc_clk_cleanup(struct isc_device *isc)
>>                        clk_unregister(isc_clk->clk);
>>        }
>>   }
>> -EXPORT_SYMBOL_GPL(isc_clk_cleanup);
>> +EXPORT_SYMBOL_GPL(atmel_isc_clk_cleanup);
>> diff --git a/drivers/media/platform/atmel/atmel-isc-regs.h b/drivers/staging/media/atmel/atmel-isc-regs.h
>> similarity index 100%
>> rename from drivers/media/platform/atmel/atmel-isc-regs.h
>> rename to drivers/staging/media/atmel/atmel-isc-regs.h
>> diff --git a/drivers/media/platform/atmel/atmel-isc.h b/drivers/staging/media/atmel/atmel-isc.h
>> similarity index 96%
>> rename from drivers/media/platform/atmel/atmel-isc.h
>> rename to drivers/staging/media/atmel/atmel-isc.h
>> index ff60ba020cb9..dfc030b5a08f 100644
>> --- a/drivers/media/platform/atmel/atmel-isc.h
>> +++ b/drivers/staging/media/atmel/atmel-isc.h
>> @@ -350,13 +350,13 @@ struct isc_device {
>>        u32                             formats_list_size;
>>   };
>>
>> -extern const struct regmap_config isc_regmap_config;
>> -extern const struct v4l2_async_notifier_operations isc_async_ops;
>> -
>> -irqreturn_t isc_interrupt(int irq, void *dev_id);
>> -int isc_pipeline_init(struct isc_device *isc);
>> -int isc_clk_init(struct isc_device *isc);
>> -void isc_subdev_cleanup(struct isc_device *isc);
>> -void isc_clk_cleanup(struct isc_device *isc);
>> +extern const struct regmap_config atmel_isc_regmap_config;
>> +extern const struct v4l2_async_notifier_operations atmel_isc_async_ops;
>> +
>> +irqreturn_t atmel_isc_interrupt(int irq, void *dev_id);
>> +int atmel_isc_pipeline_init(struct isc_device *isc);
>> +int atmel_isc_clk_init(struct isc_device *isc);
>> +void atmel_isc_subdev_cleanup(struct isc_device *isc);
>> +void atmel_isc_clk_cleanup(struct isc_device *isc);
>>
>>   #endif
>> diff --git a/drivers/media/platform/atmel/atmel-sama5d2-isc.c b/drivers/staging/media/atmel/atmel-sama5d2-isc.c
>> similarity index 97%
>> rename from drivers/media/platform/atmel/atmel-sama5d2-isc.c
>> rename to drivers/staging/media/atmel/atmel-sama5d2-isc.c
>> index 9881d89a645b..ba0614f981a2 100644
>> --- a/drivers/media/platform/atmel/atmel-sama5d2-isc.c
>> +++ b/drivers/staging/media/atmel/atmel-sama5d2-isc.c
>> @@ -408,7 +408,7 @@ static int atmel_isc_probe(struct platform_device *pdev)
>>        if (IS_ERR(io_base))
>>                return PTR_ERR(io_base);
>>
>> -     isc->regmap = devm_regmap_init_mmio(dev, io_base, &isc_regmap_config);
>> +     isc->regmap = devm_regmap_init_mmio(dev, io_base, &atmel_isc_regmap_config);
>>        if (IS_ERR(isc->regmap)) {
>>                ret = PTR_ERR(isc->regmap);
>>                dev_err(dev, "failed to init register map: %d\n", ret);
>> @@ -419,7 +419,7 @@ static int atmel_isc_probe(struct platform_device *pdev)
>>        if (irq < 0)
>>                return irq;
>>
>> -     ret = devm_request_irq(dev, irq, isc_interrupt, 0,
>> +     ret = devm_request_irq(dev, irq, atmel_isc_interrupt, 0,
>>                               "atmel-sama5d2-isc", isc);
>>        if (ret < 0) {
>>                dev_err(dev, "can't register ISR for IRQ %u (ret=%i)\n",
>> @@ -464,7 +464,7 @@ static int atmel_isc_probe(struct platform_device *pdev)
>>        /* sama5d2-isc : ISPCK is required and mandatory */
>>        isc->ispck_required = true;
>>
>> -     ret = isc_pipeline_init(isc);
>> +     ret = atmel_isc_pipeline_init(isc);
>>        if (ret)
>>                return ret;
>>
>> @@ -481,7 +481,7 @@ static int atmel_isc_probe(struct platform_device *pdev)
>>                return ret;
>>        }
>>
>> -     ret = isc_clk_init(isc);
>> +     ret = atmel_isc_clk_init(isc);
>>        if (ret) {
>>                dev_err(dev, "failed to init isc clock: %d\n", ret);
>>                goto unprepare_hclk;
>> @@ -523,7 +523,7 @@ static int atmel_isc_probe(struct platform_device *pdev)
>>                        goto cleanup_subdev;
>>                }
>>
>> -             subdev_entity->notifier.ops = &isc_async_ops;
>> +             subdev_entity->notifier.ops = &atmel_isc_async_ops;
>>
>>                ret = v4l2_async_nf_register(&isc->v4l2_dev,
>>                                             &subdev_entity->notifier);
>> @@ -567,7 +567,7 @@ static int atmel_isc_probe(struct platform_device *pdev)
>>        pm_runtime_disable(dev);
>>
>>   cleanup_subdev:
>> -     isc_subdev_cleanup(isc);
>> +     atmel_isc_subdev_cleanup(isc);
>>
>>   unregister_v4l2_device:
>>        v4l2_device_unregister(&isc->v4l2_dev);
>> @@ -575,7 +575,7 @@ static int atmel_isc_probe(struct platform_device *pdev)
>>   unprepare_hclk:
>>        clk_disable_unprepare(isc->hclock);
>>
>> -     isc_clk_cleanup(isc);
>> +     atmel_isc_clk_cleanup(isc);
>>
>>        return ret;
>>   }
>> @@ -586,14 +586,14 @@ static int atmel_isc_remove(struct platform_device *pdev)
>>
>>        pm_runtime_disable(&pdev->dev);
>>
>> -     isc_subdev_cleanup(isc);
>> +     atmel_isc_subdev_cleanup(isc);
>>
>>        v4l2_device_unregister(&isc->v4l2_dev);
>>
>>        clk_disable_unprepare(isc->ispck);
>>        clk_disable_unprepare(isc->hclock);
>>
>> -     isc_clk_cleanup(isc);
>> +     atmel_isc_clk_cleanup(isc);
>>
>>        return 0;
>>   }
>> diff --git a/drivers/media/platform/atmel/atmel-sama7g5-isc.c b/drivers/staging/media/atmel/atmel-sama7g5-isc.c
>> similarity index 97%
>> rename from drivers/media/platform/atmel/atmel-sama7g5-isc.c
>> rename to drivers/staging/media/atmel/atmel-sama7g5-isc.c
>> index 8b11aa8340d7..01ababdfcbd9 100644
>> --- a/drivers/media/platform/atmel/atmel-sama7g5-isc.c
>> +++ b/drivers/staging/media/atmel/atmel-sama7g5-isc.c
>> @@ -397,7 +397,7 @@ static int microchip_xisc_probe(struct platform_device *pdev)
>>        if (IS_ERR(io_base))
>>                return PTR_ERR(io_base);
>>
>> -     isc->regmap = devm_regmap_init_mmio(dev, io_base, &isc_regmap_config);
>> +     isc->regmap = devm_regmap_init_mmio(dev, io_base, &atmel_isc_regmap_config);
>>        if (IS_ERR(isc->regmap)) {
>>                ret = PTR_ERR(isc->regmap);
>>                dev_err(dev, "failed to init register map: %d\n", ret);
>> @@ -408,7 +408,7 @@ static int microchip_xisc_probe(struct platform_device *pdev)
>>        if (irq < 0)
>>                return irq;
>>
>> -     ret = devm_request_irq(dev, irq, isc_interrupt, 0,
>> +     ret = devm_request_irq(dev, irq, atmel_isc_interrupt, 0,
>>                               "microchip-sama7g5-xisc", isc);
>>        if (ret < 0) {
>>                dev_err(dev, "can't register ISR for IRQ %u (ret=%i)\n",
>> @@ -453,7 +453,7 @@ static int microchip_xisc_probe(struct platform_device *pdev)
>>        /* sama7g5-isc : ISPCK does not exist, ISC is clocked by MCK */
>>        isc->ispck_required = false;
>>
>> -     ret = isc_pipeline_init(isc);
>> +     ret = atmel_isc_pipeline_init(isc);
>>        if (ret)
>>                return ret;
>>
>> @@ -470,7 +470,7 @@ static int microchip_xisc_probe(struct platform_device *pdev)
>>                return ret;
>>        }
>>
>> -     ret = isc_clk_init(isc);
>> +     ret = atmel_isc_clk_init(isc);
>>        if (ret) {
>>                dev_err(dev, "failed to init isc clock: %d\n", ret);
>>                goto unprepare_hclk;
>> @@ -513,7 +513,7 @@ static int microchip_xisc_probe(struct platform_device *pdev)
>>                        goto cleanup_subdev;
>>                }
>>
>> -             subdev_entity->notifier.ops = &isc_async_ops;
>> +             subdev_entity->notifier.ops = &atmel_isc_async_ops;
>>
>>                ret = v4l2_async_nf_register(&isc->v4l2_dev,
>>                                             &subdev_entity->notifier);
>> @@ -536,7 +536,7 @@ static int microchip_xisc_probe(struct platform_device *pdev)
>>        return 0;
>>
>>   cleanup_subdev:
>> -     isc_subdev_cleanup(isc);
>> +     atmel_isc_subdev_cleanup(isc);
>>
>>   unregister_v4l2_device:
>>        v4l2_device_unregister(&isc->v4l2_dev);
>> @@ -544,7 +544,7 @@ static int microchip_xisc_probe(struct platform_device *pdev)
>>   unprepare_hclk:
>>        clk_disable_unprepare(isc->hclock);
>>
>> -     isc_clk_cleanup(isc);
>> +     atmel_isc_clk_cleanup(isc);
>>
>>        return ret;
>>   }
>> @@ -555,13 +555,13 @@ static int microchip_xisc_remove(struct platform_device *pdev)
>>
>>        pm_runtime_disable(&pdev->dev);
>>
>> -     isc_subdev_cleanup(isc);
>> +     atmel_isc_subdev_cleanup(isc);
>>
>>        v4l2_device_unregister(&isc->v4l2_dev);
>>
>>        clk_disable_unprepare(isc->hclock);
>>
>> -     isc_clk_cleanup(isc);
>> +     atmel_isc_clk_cleanup(isc);
>>
>>        return 0;
>>   }
> 





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