Update cheatsheets

tldr/linux/i2cdump

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# i2cdump
+
+> Dump I2C device registers.
+> See also: `i2cdetect`, `i2cget`, `i2cset`.
+> Note: All addresses should be specified in hexadecimal.
+> More information: <https://manned.org/i2cdump>.
+
+- Dump all registers of an I2C device:
+
+`i2cdump {{i2cbus}} {{device_address}}`
+
+- Dump all registers of an I2C device without asking for confirmation:
+
+`i2cdump -y {{i2cbus}} {{device_address}}`
+
+- Dump all registers of an I2C device using a specific mode:
+
+`i2cdump {{i2cbus}} {{device_address}} {{b|w|c|s|i}}`
+
+- Dump registers from `start` to `end` of an I2C device:
+
+`i2cdump -r {{start}}-{{end}} {{i2cbus}} {{device_address}}`