overlays: gpio-shutdown: Add information for Raspberry PI 1 rev 1 #3589
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KeyboardSignal and kb::kbrequest can be used to call /sbin/shutdown
arch/arm/boot/dts/overlays/README
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| @@ -874,9 +874,14 @@ Info: Initiates a shutdown when GPIO pin changes. The given GPIO pin | |||
| can be powered up again by driving GPIO3 low. The default | |||
| configuration uses GPIO3 with a pullup, so if you connect a | |||
| button between GPIO3 and GND (pin 5 and 6 on the 40-pin header), | |||
| you get a shutdown and power-up button. | |||
| you get a shutdown and power-up button. Please note that older | |||
| Raspberry PI 1 rev 1 uses GPIO1 instead of GPIO3. | |||
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We prefer to write it "Raspberry Pi", but the device in question was the "Model B rev 1" (which is long enough on its own without the "Raspberry Pi" at the start), so please replace all occurrences of "Raspberry PI 1" with "Model B".
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This wording implies that only older Pi B rev 1 boards use GPIO1, while newer Pi B rev 1 boards use GPIO3. Is that correct, or do all Pi B rev 1 boards use GPIO1? If the latter, please remove 'older' from the description. |
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I didn't read it that way, but you are right that the word older is at least unnecessary. |
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To make it clear, see https://raspberrypi.stackexchange.com/a/87594 Could suggest how to rewrite documentation to be unambiguous? |
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If you remove every occurrence of the word "older" from your additions it should be clear enough and unambiguous. |
…ev 1 Raspberry Pi 1 Model B rev 1 uses GPIO1 for power-up instead of GPIO3.
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Done! |
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I can live with that. |
Older Raspberry PI 1 rev 1 uses GPIO1 for power-up instead of GPIO3.
See discussion: #2103 (comment)
CC: @matthijskooijman