Messages in this thread | | | From | Han Nandor <> | Subject | [PATCH v3 0/2] Use NVMEM as reboot-mode write interface | Date | Sun, 21 Apr 2019 19:09:28 +0000 |
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Description ----------- Extend the reboot mode driver to use a NVMEM cell as writing interface.
Testing ------- The testing is done by configuring DT from a custom board. The NVMEM cell is configured in an RTC non-volatile memory. Kernel: 4.14.60 (the patchset was rebased on kernel master)
DT configurations: ` ... reboot-mode-nvmem@0 { compatible = "simple-mfd"; reboot-mode { compatible = "nvmem-reboot-mode"; nvmem-cells = <&reboot_mode>; nvmem-cell-names = "reboot-mode";
mode-test = <0x21969147>; }; }; ... reboot_mode: nvmem_reboot_mode@0 { reg = <0x00 0x4>; }; ... `
1. Reboot the system using the command `reboot test`
2. Verify that kernel logs show that reboot was done in mode `test`: PASS `[ 413.957172] reboot: Restarting system with command 'test' `
3. Stop in U-Boot and verify that mode `test` magic value is present in RTCs non-volatile memory: PASS
Kernel: 5.1.0-rc3
1. Configure `arch/arm/configs/imx_v6_v7_defconfig` to contain `CONFIG_NVMEM_REBOOT_MODE=y` 2. Verify that Kernel compiles successful: PASS ` make ARCH=arm CROSS_COMPILE=arm-linux-gnu- imx_v6_v7_defconfig zImage ... CC drivers/power/reset/nvmem-reboot-mode.o ... Kernel: arch/arm/boot/zImage is ready ` Changes since v1: ----------------- - split the documentation on a separate patch - add a missing header
Changes since v2: ---------------- - change the module license to GPL since GPL v2 is deprecated
Nandor Han (2): power: reset: nvmem-reboot-mode: use NVMEM as reboot mode write interface dt-bindings: power: reset: add document for NVMEM based reboot-mode
.../power/reset/nvmem-reboot-mode.txt | 32 ++++++++ drivers/power/reset/Kconfig | 9 +++ drivers/power/reset/Makefile | 1 + drivers/power/reset/nvmem-reboot-mode.c | 76 +++++++++++++++++++ 4 files changed, 118 insertions(+) create mode 100644 Documentation/devicetree/bindings/power/reset/nvmem-reboot-mode.txt create mode 100644 drivers/power/reset/nvmem-reboot-mode.c
-- 2.17.2
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