* [PATCH v2 0/2] Add reboot modes for LEGO MINDSTORMS EV3
@ 2018-01-12 2:29 David Lechner
2018-01-12 2:29 ` [PATCH v2 1/2] ARM: dts: da850-lego-ev3: Add node for reboot modes David Lechner
` (2 more replies)
0 siblings, 3 replies; 6+ messages in thread
From: David Lechner @ 2018-01-12 2:29 UTC (permalink / raw)
To: linux-arm-kernel
Cc: David Lechner, Sekhar Nori, Kevin Hilman, Rob Herring,
Mark Rutland, devicetree, linux-kernel
This series adds a new device tree node to declare a special memory
address that is used by the I2C bootloader on LEGO MINDSTORMS EV3
to boot into a special firmware update mode and enables the required
module to use it.
v2 changes:
* rebase on linux-davinci/master
David Lechner (2):
ARM: dts: da850-lego-ev3: Add node for reboot modes
ARM: davinci_all_defconfig: enable SYSCON_REBOOT_MODE
arch/arm/boot/dts/da850-lego-ev3.dts | 17 +++++++++++++++++
arch/arm/configs/davinci_all_defconfig | 1 +
2 files changed, 18 insertions(+)
--
2.7.4
^ permalink raw reply [flat|nested] 6+ messages in thread* [PATCH v2 1/2] ARM: dts: da850-lego-ev3: Add node for reboot modes
2018-01-12 2:29 [PATCH v2 0/2] Add reboot modes for LEGO MINDSTORMS EV3 David Lechner
@ 2018-01-12 2:29 ` David Lechner
2018-02-23 11:51 ` Sekhar Nori
2018-01-12 2:29 ` [PATCH v2 2/2] ARM: davinci_all_defconfig: enable SYSCON_REBOOT_MODE David Lechner
2018-02-19 18:03 ` [PATCH v2 0/2] Add reboot modes for LEGO MINDSTORMS EV3 David Lechner
2 siblings, 1 reply; 6+ messages in thread
From: David Lechner @ 2018-01-12 2:29 UTC (permalink / raw)
To: linux-arm-kernel
Cc: David Lechner, Sekhar Nori, Kevin Hilman, Rob Herring,
Mark Rutland, devicetree, linux-kernel
This adds a new node for reboot modes on LEGO MINDSTORMS EV3. The EV3's
bootloader looks for a magic number in the ARM local RAM and if found,
it will boot into a special firmware update mode where the flash memory
can be written via USB.
This has been testing working using the command:
# systemctl reboot loader
Signed-off-by: David Lechner <david@lechnology.com>
---
arch/arm/boot/dts/da850-lego-ev3.dts | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/arch/arm/boot/dts/da850-lego-ev3.dts b/arch/arm/boot/dts/da850-lego-ev3.dts
index 81942ae..2e85080 100644
--- a/arch/arm/boot/dts/da850-lego-ev3.dts
+++ b/arch/arm/boot/dts/da850-lego-ev3.dts
@@ -184,6 +184,23 @@
io-channel-names = "voltage", "current";
rechargeable-gpios = <&gpio 136 GPIO_ACTIVE_LOW>;
};
+
+ /* ARM local RAM */
+ memory@ffff0000 {
+ compatible = "syscon", "simple-mfd";
+ reg = <0xffff0000 0x2000>; /* 8k */
+
+ /*
+ * The I2C bootloader looks for this magic value to either
+ * boot normally or boot into a firmware update mode.
+ */
+ reboot-mode {
+ compatible = "syscon-reboot-mode";
+ offset = <0x1ffc>;
+ mode-normal = <0x00000000>;
+ mode-loader = <0x5555aaaa>;
+ };
+ };
};
&pmx_core {
--
2.7.4
^ permalink raw reply related [flat|nested] 6+ messages in thread* Re: [PATCH v2 1/2] ARM: dts: da850-lego-ev3: Add node for reboot modes
2018-01-12 2:29 ` [PATCH v2 1/2] ARM: dts: da850-lego-ev3: Add node for reboot modes David Lechner
@ 2018-02-23 11:51 ` Sekhar Nori
0 siblings, 0 replies; 6+ messages in thread
From: Sekhar Nori @ 2018-02-23 11:51 UTC (permalink / raw)
To: David Lechner, linux-arm-kernel
Cc: Kevin Hilman, Rob Herring, Mark Rutland, devicetree, linux-kernel
On Friday 12 January 2018 07:59 AM, David Lechner wrote:
> This adds a new node for reboot modes on LEGO MINDSTORMS EV3. The EV3's
> bootloader looks for a magic number in the ARM local RAM and if found,
> it will boot into a special firmware update mode where the flash memory
> can be written via USB.
>
> This has been testing working using the command:
>
> # systemctl reboot loader
>
> Signed-off-by: David Lechner <david@lechnology.com>
Added to v4.17/dt
Thanks,
Sekhar
^ permalink raw reply [flat|nested] 6+ messages in thread
* [PATCH v2 2/2] ARM: davinci_all_defconfig: enable SYSCON_REBOOT_MODE
2018-01-12 2:29 [PATCH v2 0/2] Add reboot modes for LEGO MINDSTORMS EV3 David Lechner
2018-01-12 2:29 ` [PATCH v2 1/2] ARM: dts: da850-lego-ev3: Add node for reboot modes David Lechner
@ 2018-01-12 2:29 ` David Lechner
2018-02-23 11:54 ` Sekhar Nori
2018-02-19 18:03 ` [PATCH v2 0/2] Add reboot modes for LEGO MINDSTORMS EV3 David Lechner
2 siblings, 1 reply; 6+ messages in thread
From: David Lechner @ 2018-01-12 2:29 UTC (permalink / raw)
To: linux-arm-kernel
Cc: David Lechner, Sekhar Nori, Kevin Hilman, Rob Herring,
Mark Rutland, devicetree, linux-kernel
This enables SYSCON_REBOOT_MODE as a module. This is used by LEGO
MINDSTORMS EV3 to reboot into a special firmware update mode.
Signed-off-by: David Lechner <david@lechnology.com>
---
arch/arm/configs/davinci_all_defconfig | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm/configs/davinci_all_defconfig b/arch/arm/configs/davinci_all_defconfig
index 026154c..bcb70c2 100644
--- a/arch/arm/configs/davinci_all_defconfig
+++ b/arch/arm/configs/davinci_all_defconfig
@@ -126,6 +126,7 @@ CONFIG_GPIO_PCA953X=y
CONFIG_GPIO_PCA953X_IRQ=y
CONFIG_POWER_RESET=y
CONFIG_POWER_RESET_GPIO=y
+CONFIG_SYSCON_REBOOT_MODE=m
CONFIG_BATTERY_LEGO_EV3=m
CONFIG_WATCHDOG=y
CONFIG_DAVINCI_WATCHDOG=m
--
2.7.4
^ permalink raw reply related [flat|nested] 6+ messages in thread
* Re: [PATCH v2 0/2] Add reboot modes for LEGO MINDSTORMS EV3
2018-01-12 2:29 [PATCH v2 0/2] Add reboot modes for LEGO MINDSTORMS EV3 David Lechner
2018-01-12 2:29 ` [PATCH v2 1/2] ARM: dts: da850-lego-ev3: Add node for reboot modes David Lechner
2018-01-12 2:29 ` [PATCH v2 2/2] ARM: davinci_all_defconfig: enable SYSCON_REBOOT_MODE David Lechner
@ 2018-02-19 18:03 ` David Lechner
2 siblings, 0 replies; 6+ messages in thread
From: David Lechner @ 2018-02-19 18:03 UTC (permalink / raw)
To: linux-arm-kernel
Cc: Sekhar Nori, Kevin Hilman, Rob Herring, Mark Rutland, devicetree,
linux-kernel
On 01/11/2018 08:29 PM, David Lechner wrote:
> This series adds a new device tree node to declare a special memory
> address that is used by the I2C bootloader on LEGO MINDSTORMS EV3
> to boot into a special firmware update mode and enables the required
> module to use it.
>
> v2 changes:
> * rebase on linux-davinci/master
>
> David Lechner (2):
> ARM: dts: da850-lego-ev3: Add node for reboot modes
> ARM: davinci_all_defconfig: enable SYSCON_REBOOT_MODE
>
> arch/arm/boot/dts/da850-lego-ev3.dts | 17 +++++++++++++++++
> arch/arm/configs/davinci_all_defconfig | 1 +
> 2 files changed, 18 insertions(+)
>
Hi Sekhar,
Any objection to pickup up this series? It is independent of all
of the other changes I have been working on.
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2018-02-23 11:55 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
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2018-01-12 2:29 [PATCH v2 0/2] Add reboot modes for LEGO MINDSTORMS EV3 David Lechner
2018-01-12 2:29 ` [PATCH v2 1/2] ARM: dts: da850-lego-ev3: Add node for reboot modes David Lechner
2018-02-23 11:51 ` Sekhar Nori
2018-01-12 2:29 ` [PATCH v2 2/2] ARM: davinci_all_defconfig: enable SYSCON_REBOOT_MODE David Lechner
2018-02-23 11:54 ` Sekhar Nori
2018-02-19 18:03 ` [PATCH v2 0/2] Add reboot modes for LEGO MINDSTORMS EV3 David Lechner
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