docs(penta-sata-hat): add I2C7 overlay troubleshooting for ROCK 4 top board - #2027
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Milir-Radxa merged 3 commits intoAug 17, 2026
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… board Add a troubleshooting section for ROCK 4 series (incl. ROCK Pi 4) on newer Bookworm images: enable the I2C7 overlay via rsetup when the top board OLED stays on 'ROCKPI SATA HAT loading...' or the fan misbehaves, and document how to check which I2C bus the top board is attached to (i2cdetect -l / -y).
added 2 commits
August 17, 2026 17:30
Do not hardcode a single I2C bus number in the FAQ: add a per-model overlay table (ROCK 4: I2C7, ROCK 5A: I2C8, ROCK 3A: I2C3, ROCK 3C: software I2C, RPi 4/5: I2C1) and note that the actual bus number must be checked with i2cdetect -l. Any bus number shown is marked as an example for ROCK 4 series only.
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背景
来自论坛用户反馈（https://forum.radxa.com/t/rock-pi-4b-penta-sata-hat-top-board-problem-rockpi-sata-hat-loading/31317/1）：
rock-pi-4b_bookworm_kde_r4.output_512镜像rockpi-penta服务报FileNotFoundError: /sys/class/pwm/pwmchip1/pwm0/period、Device or resource busyrsetup启用 I2C7 overlay 后解决本次修改
在
sata-hat-top-board.md（中英双语）中新增两节：sudo rsetup启用 I2C7（必要时 PWM1）的解决步骤i2cdetect -l/i2cdetect -y <bus>确认顶板 OLED (SSD1306, 0x3c) 挂载在哪个 I2C 总线影响范围