[PATCH 0/6] Extend SOM detection

[PATCH 0/6] Extend SOM detection

[Daniel Schultz]

This patchset extends PHYTEC's SOM detection for the
K3 platforms.

It adds generic support to apply overlays via the
extension framework inside the overlays.env file. Additionally,
the K3 mmc boot environment applies these overlays now.

It also adds the 'extension_board_scan' hook to the K3 board
code and adds all missing configs in the phyCORE-AM62x and
-AM64x A53 defconfigs.

Daniel Schultz (6):
  include: env: phytec: overlays: Add extension command
  include: env: phytec: k3_mmc: Apply extension overlays
  board: phytec: common: k3: Add SOM detection overlays
  board: phytec: common: Kconfig: Enable SUPPORT_EXTENSION_SCAN
  configs: phytec_am62x_a53_defconfig: Set CONFIG_CMD_EXTENSION
  configs: phycore_am64x_a53_defconfig: Enable SOM detection

 board/phytec/common/Kconfig         |  2 ++
 board/phytec/common/k3/board.c      | 45 +++++++++++++++++++++++++++++
 configs/phycore_am62x_a53_defconfig |  1 +
 configs/phycore_am64x_a53_defconfig |  2 ++
 include/env/phytec/k3_mmc.env       |  1 +
 include/env/phytec/overlays.env     | 20 +++++++++++++
 6 files changed, 71 insertions(+)

-- 
2.25.1

[PATCH 1/6] include: env: phytec: overlays: Add extension command

[Daniel Schultz]

Add a new environment routine to apply extensions. Our SOM detection
adds overlays via the extension framework to alter the kernel
device-tree according to the flashed EEPROM image.

Signed-off-by: Daniel Schultz <d.schultz@phytec.de>
---
 include/env/phytec/overlays.env | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/include/env/phytec/overlays.env b/include/env/phytec/overlays.env
index 78721cde654..50110e731bd 100644
--- a/include/env/phytec/overlays.env
+++ b/include/env/phytec/overlays.env
@@ -23,6 +23,16 @@ mmc_apply_overlays=
 			fi;
 		done;
 	fi;
+#ifdef CONFIG_CMD_EXTENSION
+mmc_apply_extensions=
+	setenv extension_overlay_addr ${fdtoverlay_addr_r};
+	setenv extension_overlay_cmd 'load mmc ${mmcdev}:${mmcpart}
+	  ${fdtoverlay_addr_r} ${extension_overlay_name}';
+	extension scan;
+	extension apply all;
+#else
+mmc_apply_extensions=echo "no extension command"
+#endif
 net_load_bootenv=${get_cmd} ${bootenv_addr_r} ${bootenv}
 net_load_overlay=${get_cmd} ${fdtoverlay_addr_r} ${overlay}
 net_apply_overlays=
@@ -36,3 +46,13 @@ net_apply_overlays=
 			fi;
 		done;
 	fi;
+#ifdef CONFIG_CMD_EXTENSION
+net_apply_extensions=
+	setenv extension_overlay_addr ${fdtoverlay_addr_r};
+	setenv extension_overlay_cmd '${get_cmd} ${fdtoverlay_addr_r}
+	 ${extension_overlay_name}';
+	extension scan;
+	extension apply all;
+#else
+net_apply_extensions=echo "no extension command"
+#endif
-- 
2.25.1

[PATCH 2/6] include: env: phytec: k3_mmc: Apply extension overlays

[Daniel Schultz]

Run the mmc_apply_extensions routine to apply overlays
added by the extension framework.

Signed-off-by: Daniel Schultz <d.schultz@phytec.de>
---
 include/env/phytec/k3_mmc.env | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/env/phytec/k3_mmc.env b/include/env/phytec/k3_mmc.env
index 3d3595ceb7e..3c0b1359dda 100644
--- a/include/env/phytec/k3_mmc.env
+++ b/include/env/phytec/k3_mmc.env
@@ -18,4 +18,5 @@ mmcboot=run mmcargs;
 	run loadimage;
 	run loadfdt;
 	run mmc_apply_overlays;
+	run mmc_apply_extensions;
 	booti ${loadaddr} - ${fdt_addr_r}
-- 
2.25.1

[PATCH 3/6] board: phytec: common: k3: Add SOM detection overlays

[Daniel Schultz]

Add overlays to disable or alter SOM features according
to the EEPROM image content.

Signed-off-by: Daniel Schultz <d.schultz@phytec.de>
---
 board/phytec/common/k3/board.c | 45 ++++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)

diff --git a/board/phytec/common/k3/board.c b/board/phytec/common/k3/board.c
index 3d7e090ccaa..867dd880675 100644
--- a/board/phytec/common/k3/board.c
+++ b/board/phytec/common/k3/board.c
@@ -8,6 +8,7 @@
 #include <fdt_support.h>
 #include <spl.h>
 #include <asm/arch/hardware.h>
+#include <extension_board.h>
 
 #include "../am6_som_detection.h"
 
@@ -104,3 +105,47 @@ int ft_board_setup(void *blob, struct bd_info *bd)
 	return 0;
 }
 #endif
+
+#if IS_ENABLED(CONFIG_CMD_EXTENSION)
+int extension_board_scan(struct list_head *extension_list)
+{
+	struct extension *extension = NULL;
+	struct phytec_eeprom_data data;
+	int count = 0;
+	int ret;
+
+	ret = phytec_eeprom_data_setup(&data, 0, EEPROM_ADDR);
+	if (ret)
+		return count;
+
+	if (phytec_get_am6_eth(&data) == 0) {
+		extension = phytec_add_extension("Disable Ethernet phy",
+						 "k3-am6xx-phycore-disable-eth-phy.dtbo", "");
+		list_add_tail(&extension->list, extension_list);
+		count++;
+	}
+
+	if (phytec_get_am6_spi(&data) == PHYTEC_EEPROM_VALUE_X) {
+		extension = phytec_add_extension("Disable SPI NOR Flash",
+						 "k3-am6xx-phycore-disable-spi-nor.dtbo", "");
+		list_add_tail(&extension->list, extension_list);
+		count++;
+	}
+
+	if (phytec_am6_is_qspi(&data)) {
+		extension = phytec_add_extension("Select QSPI NOR Flash",
+						 "k3-am6xx-phycore-qspi-nor.dtbo", "");
+		list_add_tail(&extension->list, extension_list);
+		count++;
+	}
+
+	if (phytec_get_am6_rtc(&data) == 0) {
+		extension = phytec_add_extension("Disable RTC",
+						 "k3-am6xx-phycore-disable-rtc.dtbo", "");
+		list_add_tail(&extension->list, extension_list);
+		count++;
+	}
+
+	return count;
+}
+#endif
-- 
2.25.1

[PATCH 4/6] board: phytec: common: Kconfig: Enable SUPPORT_EXTENSION_SCAN

[Daniel Schultz]

Enable SUPPORT_EXTENSION_SCAN for the phyCORE-AM62x and -AM64x
boards.

Signed-off-by: Daniel Schultz <d.schultz@phytec.de>
---
 board/phytec/common/Kconfig | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/board/phytec/common/Kconfig b/board/phytec/common/Kconfig
index f394ace786a..120f58b6ec6 100644
--- a/board/phytec/common/Kconfig
+++ b/board/phytec/common/Kconfig
@@ -24,6 +24,7 @@ config PHYTEC_AM62_SOM_DETECTION
 	depends on (TARGET_PHYCORE_AM62X_A53 || TARGET_PHYCORE_AM62X_R5) && \
 		   PHYTEC_SOM_DETECTION
 	select PHYTEC_SOM_DETECTION_BLOCKS
+	select SUPPORT_EXTENSION_SCAN
 	depends on SPL_I2C && DM_I2C
 	default y
 	help
@@ -35,6 +36,7 @@ config PHYTEC_AM64_SOM_DETECTION
 	depends on (TARGET_PHYCORE_AM64X_A53 || TARGET_PHYCORE_AM64X_R5) && \
 		   PHYTEC_SOM_DETECTION
 	select PHYTEC_SOM_DETECTION_BLOCKS
+	select SUPPORT_EXTENSION_SCAN
 	depends on SPL_I2C && DM_I2C
 	default y
 	help
-- 
2.25.1

[PATCH 5/6] configs: phytec_am62x_a53_defconfig: Set CONFIG_CMD_EXTENSION

[Daniel Schultz]

CONFIG_CMD_EXTENSION is required to load SOM detection overlays.

Signed-off-by: Daniel Schultz <d.schultz@phytec.de>
---
 configs/phycore_am62x_a53_defconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/configs/phycore_am62x_a53_defconfig b/configs/phycore_am62x_a53_defconfig
index 06b8834e074..ec75b1a424d 100644
--- a/configs/phycore_am62x_a53_defconfig
+++ b/configs/phycore_am62x_a53_defconfig
@@ -63,6 +63,7 @@ CONFIG_SPL_SPI_FLASH_SFDP_SUPPORT=y
 CONFIG_SPL_SPI_LOAD=y
 CONFIG_SYS_SPI_U_BOOT_OFFS=0x280000
 CONFIG_SPL_YMODEM_SUPPORT=y
+CONFIG_CMD_EXTENSION=y
 CONFIG_CMD_DFU=y
 CONFIG_CMD_I2C=y
 CONFIG_CMD_MMC=y
-- 
2.25.1

[PATCH 6/6] configs: phycore_am64x_a53_defconfig: Enable SOM detection

[Daniel Schultz]

Enable SOM detection for the phyCORE-AM64x and also set
CONFIG_CMD_EXTENSION as requirement for this feature.

Signed-off-by: Daniel Schultz <d.schultz@phytec.de>
---
 configs/phycore_am64x_a53_defconfig | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/configs/phycore_am64x_a53_defconfig b/configs/phycore_am64x_a53_defconfig
index fe09f79796d..c4145e9c10c 100644
--- a/configs/phycore_am64x_a53_defconfig
+++ b/configs/phycore_am64x_a53_defconfig
@@ -10,6 +10,7 @@ CONFIG_NR_DRAM_BANKS=2
 CONFIG_SOC_K3_AM642=y
 CONFIG_K3_ATF_LOAD_ADDR=0x701c0000
 CONFIG_TARGET_PHYCORE_AM64X_A53=y
+CONFIG_PHYTEC_SOM_DETECTION=y
 CONFIG_HAS_CUSTOM_SYS_INIT_SP_ADDR=y
 CONFIG_CUSTOM_SYS_INIT_SP_ADDR=0x80480000
 CONFIG_ENV_SIZE=0x20000
@@ -63,6 +64,7 @@ CONFIG_SPL_SPI_FLASH_SFDP_SUPPORT=y
 CONFIG_SPL_SPI_LOAD=y
 CONFIG_SYS_SPI_U_BOOT_OFFS=0x280000
 CONFIG_SPL_YMODEM_SUPPORT=y
+CONFIG_CMD_EXTENSION=y
 CONFIG_CMD_ASKENV=y
 CONFIG_CMD_DFU=y
 CONFIG_CMD_GPT=y
-- 
2.25.1

Re: [PATCH 1/6] include: env: phytec: overlays: Add extension command

[Yannic Moog]

Hello Daniel,

On Sun, 2024-07-07 at 23:07 -0700, Daniel Schultz wrote:
> Add a new environment routine to apply extensions. Our SOM detection
> adds overlays via the extension framework to alter the kernel
> device-tree according to the flashed EEPROM image.
> 
> Signed-off-by: Daniel Schultz <d.schultz@phytec.de>
> ---
>  include/env/phytec/overlays.env | 20 ++++++++++++++++++++
>  1 file changed, 20 insertions(+)
> 
> diff --git a/include/env/phytec/overlays.env b/include/env/phytec/overlays.env
> index 78721cde654..50110e731bd 100644
> --- a/include/env/phytec/overlays.env
> +++ b/include/env/phytec/overlays.env
> @@ -23,6 +23,16 @@ mmc_apply_overlays=
>  			fi;
>  		done;
>  	fi;
> +#ifdef CONFIG_CMD_EXTENSION
> +mmc_apply_extensions=
> +	setenv extension_overlay_addr ${fdtoverlay_addr_r};
> +	setenv extension_overlay_cmd 'load mmc ${mmcdev}:${mmcpart}
> +	  ${fdtoverlay_addr_r} ${extension_overlay_name}';
> +	extension scan;
> +	extension apply all;
> +#else
> +mmc_apply_extensions=echo "no extension command"

Do you think it makes sense to make this fail? I would think "apply_extensions" would be
unsuccessful if extensions are not working.

Yannic

> +#endif
>  net_load_bootenv=${get_cmd} ${bootenv_addr_r} ${bootenv}
>  net_load_overlay=${get_cmd} ${fdtoverlay_addr_r} ${overlay}
>  net_apply_overlays=
> @@ -36,3 +46,13 @@ net_apply_overlays=
>  			fi;
>  		done;
>  	fi;
> +#ifdef CONFIG_CMD_EXTENSION
> +net_apply_extensions=
> +	setenv extension_overlay_addr ${fdtoverlay_addr_r};
> +	setenv extension_overlay_cmd '${get_cmd} ${fdtoverlay_addr_r}
> +	 ${extension_overlay_name}';
> +	extension scan;
> +	extension apply all;
> +#else
> +net_apply_extensions=echo "no extension command"
> +#endif

Re: [PATCH 0/6] Extend SOM detection

[Daniel Schultz]

Hey,

please don't apply these patches. We just found an issue while working 
on another task. Sorry!

Best Regards,
Daniel

On 08.07.24 08:07, Daniel Schultz wrote:
> This patchset extends PHYTEC's SOM detection for the
> K3 platforms.
>
> It adds generic support to apply overlays via the
> extension framework inside the overlays.env file. Additionally,
> the K3 mmc boot environment applies these overlays now.
>
> It also adds the 'extension_board_scan' hook to the K3 board
> code and adds all missing configs in the phyCORE-AM62x and
> -AM64x A53 defconfigs.
>
> Daniel Schultz (6):
>    include: env: phytec: overlays: Add extension command
>    include: env: phytec: k3_mmc: Apply extension overlays
>    board: phytec: common: k3: Add SOM detection overlays
>    board: phytec: common: Kconfig: Enable SUPPORT_EXTENSION_SCAN
>    configs: phytec_am62x_a53_defconfig: Set CONFIG_CMD_EXTENSION
>    configs: phycore_am64x_a53_defconfig: Enable SOM detection
>
>   board/phytec/common/Kconfig         |  2 ++
>   board/phytec/common/k3/board.c      | 45 +++++++++++++++++++++++++++++
>   configs/phycore_am62x_a53_defconfig |  1 +
>   configs/phycore_am64x_a53_defconfig |  2 ++
>   include/env/phytec/k3_mmc.env       |  1 +
>   include/env/phytec/overlays.env     | 20 +++++++++++++
>   6 files changed, 71 insertions(+)
>

Re: [PATCH 1/6] include: env: phytec: overlays: Add extension command

[Daniel Schultz]

Hi Yannic,

On 09.07.24 08:49, Yannic Moog wrote:
> Hello Daniel,
>
> On Sun, 2024-07-07 at 23:07 -0700, Daniel Schultz wrote:
>> Add a new environment routine to apply extensions. Our SOM detection
>> adds overlays via the extension framework to alter the kernel
>> device-tree according to the flashed EEPROM image.
>>
>> Signed-off-by: Daniel Schultz <d.schultz@phytec.de>
>> ---
>>   include/env/phytec/overlays.env | 20 ++++++++++++++++++++
>>   1 file changed, 20 insertions(+)
>>
>> diff --git a/include/env/phytec/overlays.env b/include/env/phytec/overlays.env
>> index 78721cde654..50110e731bd 100644
>> --- a/include/env/phytec/overlays.env
>> +++ b/include/env/phytec/overlays.env
>> @@ -23,6 +23,16 @@ mmc_apply_overlays=
>>   			fi;
>>   		done;
>>   	fi;
>> +#ifdef CONFIG_CMD_EXTENSION
>> +mmc_apply_extensions=
>> +	setenv extension_overlay_addr ${fdtoverlay_addr_r};
>> +	setenv extension_overlay_cmd 'load mmc ${mmcdev}:${mmcpart}
>> +	  ${fdtoverlay_addr_r} ${extension_overlay_name}';
>> +	extension scan;
>> +	extension apply all;
>> +#else
>> +mmc_apply_extensions=echo "no extension command"
> Do you think it makes sense to make this fail? I would think "apply_extensions" would be
> unsuccessful if extensions are not working.

Technically, you don't need our SOM detection overlays. They just make 
the boot nicer and you don't have any probe errors or other error 
messages. So, in my opinion, it's better not apply them instead of 
stopping the entire boot.

Regards,
Daniel

>
> Yannic
>
>> +#endif
>>   net_load_bootenv=${get_cmd} ${bootenv_addr_r} ${bootenv}
>>   net_load_overlay=${get_cmd} ${fdtoverlay_addr_r} ${overlay}
>>   net_apply_overlays=
>> @@ -36,3 +46,13 @@ net_apply_overlays=
>>   			fi;
>>   		done;
>>   	fi;
>> +#ifdef CONFIG_CMD_EXTENSION
>> +net_apply_extensions=
>> +	setenv extension_overlay_addr ${fdtoverlay_addr_r};
>> +	setenv extension_overlay_cmd '${get_cmd} ${fdtoverlay_addr_r}
>> +	 ${extension_overlay_name}';
>> +	extension scan;
>> +	extension apply all;
>> +#else
>> +net_apply_extensions=echo "no extension command"
>> +#endif

Re: [PATCH 1/6] include: env: phytec: overlays: Add extension command

[Wadim Egorov]

Am 09.07.24 um 15:31 schrieb Daniel Schultz:
> Hi Yannic,
> 
> On 09.07.24 08:49, Yannic Moog wrote:
>> Hello Daniel,
>>
>> On Sun, 2024-07-07 at 23:07 -0700, Daniel Schultz wrote:
>>> Add a new environment routine to apply extensions. Our SOM detection
>>> adds overlays via the extension framework to alter the kernel
>>> device-tree according to the flashed EEPROM image.
>>>
>>> Signed-off-by: Daniel Schultz <d.schultz@phytec.de>
>>> ---
>>>   include/env/phytec/overlays.env | 20 ++++++++++++++++++++
>>>   1 file changed, 20 insertions(+)
>>>
>>> diff --git a/include/env/phytec/overlays.env 
>>> b/include/env/phytec/overlays.env
>>> index 78721cde654..50110e731bd 100644
>>> --- a/include/env/phytec/overlays.env
>>> +++ b/include/env/phytec/overlays.env
>>> @@ -23,6 +23,16 @@ mmc_apply_overlays=
>>>               fi;
>>>           done;
>>>       fi;
>>> +#ifdef CONFIG_CMD_EXTENSION
>>> +mmc_apply_extensions=
>>> +    setenv extension_overlay_addr ${fdtoverlay_addr_r};
>>> +    setenv extension_overlay_cmd 'load mmc ${mmcdev}:${mmcpart}
>>> +      ${fdtoverlay_addr_r} ${extension_overlay_name}';
>>> +    extension scan;
>>> +    extension apply all;
>>> +#else
>>> +mmc_apply_extensions=echo "no extension command"
>> Do you think it makes sense to make this fail? I would think 
>> "apply_extensions" would be
>> unsuccessful if extensions are not working.
> 
> Technically, you don't need our SOM detection overlays. They just make 
> the boot nicer and you don't have any probe errors or other error 
> messages. So, in my opinion, it's better not apply them instead of 
> stopping the entire boot.

My recommendation is to embed all SoM variant related overlays into 
u-boot.img's FIT using binman.

This makes the extension command obsolete, and especially the handling 
for loading of overlays from different boot sources / storage devices.

Having them available directly in the u-boot binary resolves the issue 
of not found overlays.

We do not know how users will proceed after u-boot booted and if the 
overlays will be available to the "extension setup". Better to have 
everything in place and fixup to the best we know using our SoM data 
stored in the EEPROM.

This kind of overlays should be applied regardless of the boot device.

> 
> Regards,
> Daniel
> 
>>
>> Yannic
>>
>>> +#endif
>>>   net_load_bootenv=${get_cmd} ${bootenv_addr_r} ${bootenv}
>>>   net_load_overlay=${get_cmd} ${fdtoverlay_addr_r} ${overlay}
>>>   net_apply_overlays=
>>> @@ -36,3 +46,13 @@ net_apply_overlays=
>>>               fi;
>>>           done;
>>>       fi;
>>> +#ifdef CONFIG_CMD_EXTENSION
>>> +net_apply_extensions=
>>> +    setenv extension_overlay_addr ${fdtoverlay_addr_r};
>>> +    setenv extension_overlay_cmd '${get_cmd} ${fdtoverlay_addr_r}
>>> +     ${extension_overlay_name}';
>>> +    extension scan;
>>> +    extension apply all;
>>> +#else
>>> +net_apply_extensions=echo "no extension command"
>>> +#endif

Re: [PATCH 1/6] include: env: phytec: overlays: Add extension command

[Yannic Moog]

On Tue, 2024-07-09 at 15:47 +0200, Wadim Egorov wrote:
> 
> 
> Am 09.07.24 um 15:31 schrieb Daniel Schultz:
> > Hi Yannic,
> > 
> > On 09.07.24 08:49, Yannic Moog wrote:
> > > Hello Daniel,
> > > 
> > > On Sun, 2024-07-07 at 23:07 -0700, Daniel Schultz wrote:
> > > > Add a new environment routine to apply extensions. Our SOM detection
> > > > adds overlays via the extension framework to alter the kernel
> > > > device-tree according to the flashed EEPROM image.
> > > > 
> > > > Signed-off-by: Daniel Schultz <d.schultz@phytec.de>
> > > > ---
> > > >   include/env/phytec/overlays.env | 20 ++++++++++++++++++++
> > > >   1 file changed, 20 insertions(+)
> > > > 
> > > > diff --git a/include/env/phytec/overlays.env 
> > > > b/include/env/phytec/overlays.env
> > > > index 78721cde654..50110e731bd 100644
> > > > --- a/include/env/phytec/overlays.env
> > > > +++ b/include/env/phytec/overlays.env
> > > > @@ -23,6 +23,16 @@ mmc_apply_overlays=
> > > >               fi;
> > > >           done;
> > > >       fi;
> > > > +#ifdef CONFIG_CMD_EXTENSION
> > > > +mmc_apply_extensions=
> > > > +    setenv extension_overlay_addr ${fdtoverlay_addr_r};
> > > > +    setenv extension_overlay_cmd 'load mmc ${mmcdev}:${mmcpart}
> > > > +      ${fdtoverlay_addr_r} ${extension_overlay_name}';
> > > > +    extension scan;
> > > > +    extension apply all;
> > > > +#else
> > > > +mmc_apply_extensions=echo "no extension command"
> > > Do you think it makes sense to make this fail? I would think 
> > > "apply_extensions" would be
> > > unsuccessful if extensions are not working.
> > 
> > Technically, you don't need our SOM detection overlays. They just make 
> > the boot nicer and you don't have any probe errors or other error 
> > messages. So, in my opinion, it's better not apply them instead of 
> > stopping the entire boot.
> 
> My recommendation is to embed all SoM variant related overlays into 
> u-boot.img's FIT using binman.

Didn't think binman would be used for that, but I share your opinion regarding overlay packaging.

Yannic

> 
> This makes the extension command obsolete, and especially the handling 
> for loading of overlays from different boot sources / storage devices.
> 
> Having them available directly in the u-boot binary resolves the issue 
> of not found overlays.
> 
> We do not know how users will proceed after u-boot booted and if the 
> overlays will be available to the "extension setup". Better to have 
> everything in place and fixup to the best we know using our SoM data 
> stored in the EEPROM.
> 
> This kind of overlays should be applied regardless of the boot device.
> 
> > 
> > Regards,
> > Daniel
> > 
> > > 
> > > Yannic
> > > 
> > > > +#endif
> > > >   net_load_bootenv=${get_cmd} ${bootenv_addr_r} ${bootenv}
> > > >   net_load_overlay=${get_cmd} ${fdtoverlay_addr_r} ${overlay}
> > > >   net_apply_overlays=
> > > > @@ -36,3 +46,13 @@ net_apply_overlays=
> > > >               fi;
> > > >           done;
> > > >       fi;
> > > > +#ifdef CONFIG_CMD_EXTENSION
> > > > +net_apply_extensions=
> > > > +    setenv extension_overlay_addr ${fdtoverlay_addr_r};
> > > > +    setenv extension_overlay_cmd '${get_cmd} ${fdtoverlay_addr_r}
> > > > +     ${extension_overlay_name}';
> > > > +    extension scan;
> > > > +    extension apply all;
> > > > +#else
> > > > +net_apply_extensions=echo "no extension command"
> > > > +#endif