diff options
| -rw-r--r-- | Documentation/boards/imx.rst | 29 | ||||
| -rw-r--r-- | arch/arm/dts/imx8mm-evk.dts | 1 | ||||
| -rw-r--r-- | arch/arm/dts/imx8mm-prt8mm.dts | 1 | ||||
| -rw-r--r-- | arch/arm/dts/imx8mm.dtsi | 18 |
4 files changed, 49 insertions, 0 deletions
diff --git a/Documentation/boards/imx.rst b/Documentation/boards/imx.rst index 887b45c708..4ce9d9808c 100644 --- a/Documentation/boards/imx.rst +++ b/Documentation/boards/imx.rst @@ -83,6 +83,35 @@ The images can also always be started as second stage on the target: barebox@Board Name:/ bootm /mnt/tftp/barebox-freescale-imx51-babbage.img +BootROM Reboot mode codes (bmode) +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +For select SoCs, barebox supports communicating an alternative boot medium +that BootROM should select after a warm reset:: + + barebox@FSL i.MX8MM EVK board:/ devinfo gpr.reboot_mode + Driver: syscon-reboot-mode + Bus: platform + Parent: 30390000.reset-controller@30390000.of + Parameters: + next: normal (type: enum) (values: "normal", "serial") + prev: normal (type: enum) (values: "normal", "serial") + Device node: /soc@0/bus@30000000/reset-controller@30390000/reboot-mode + reboot-mode { + compatible = "barebox,syscon-reboot-mode"; + offset = <0x94 0x98>; + mask = <0xffffffff 0x40000000>; + mode-normal = <0x0 0x0>; + mode-serial = <0x10 0x40000000>; + }; + + barebox@FSL i.MX8MM EVK board:/ gpr.reboot_mode.next=serial reset -r imxwd-warm + +This will cause barebox to fall into serial download mode on an i.MX8MM. + +Different SoCs may have more possible reboot modes available. +See the section on :ref:`Reboot modes<reboot_mode>` for more information. + High Assurance Boot ^^^^^^^^^^^^^^^^^^^ diff --git a/arch/arm/dts/imx8mm-evk.dts b/arch/arm/dts/imx8mm-evk.dts index 1e8619ccf5..304f150307 100644 --- a/arch/arm/dts/imx8mm-evk.dts +++ b/arch/arm/dts/imx8mm-evk.dts @@ -7,6 +7,7 @@ /dts-v1/; #include <arm64/freescale/imx8mm-evk.dts> +#include "imx8mm.dtsi" / { chosen { diff --git a/arch/arm/dts/imx8mm-prt8mm.dts b/arch/arm/dts/imx8mm-prt8mm.dts index bdcdd08062..abd758f285 100644 --- a/arch/arm/dts/imx8mm-prt8mm.dts +++ b/arch/arm/dts/imx8mm-prt8mm.dts @@ -7,6 +7,7 @@ /dts-v1/; #include <arm64/freescale/imx8mm.dtsi> +#include "imx8mm.dtsi" / { model = "Protonic PRT8MM"; diff --git a/arch/arm/dts/imx8mm.dtsi b/arch/arm/dts/imx8mm.dtsi new file mode 100644 index 0000000000..78bbacb2b1 --- /dev/null +++ b/arch/arm/dts/imx8mm.dtsi @@ -0,0 +1,18 @@ +// SPDX-License-Identifier: (GPL-2.0+ OR MIT) +/ { + aliases { + gpr.reboot_mode = &reboot_mode_gpr; + }; +}; + +&src { + compatible = "fsl,imx8mm-src", "fsl,imx8mq-src", "syscon", "simple-mfd"; + + reboot_mode_gpr: reboot-mode { + compatible = "barebox,syscon-reboot-mode"; + offset = <0x94>, <0x98>; /* SRC_GPR{9,10} */ + mask = <0xffffffff>, <0x40000000>; + mode-normal = <0>, <0>; + mode-serial = <0x00000010>, <0x40000000>; + }; +}; |