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docs: i2c: summary: update speed mode description

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Fastest I2C mode is 5 MHz. Update the docs and reword the paragraph
slightly.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Easwar Hariharan <eahariha@linux.microsoft.com>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
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Wolfram Sang 2024-06-21 09:30:10 +02:00
parent 75d148c90a
commit a5b88cb9fd
1 changed files with 2 additions and 2 deletions
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Documentation/i2c/summary.rst
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@ -3,8 +3,8 @@ Introduction to I2C and SMBus
=============================
I²C (pronounce: I squared C and written I2C in the kernel documentation) is
a protocol developed by Philips. It is a slow two-wire protocol (variable
speed, up to 400 kHz), with a high speed extension (3.4 MHz). It provides
a protocol developed by Philips. It is a two-wire protocol with variable
speed (typically up to 400 kHz, high speed modes up to 5 MHz). It provides
an inexpensive bus for connecting many types of devices with infrequent or
low bandwidth communications needs. I2C is widely used with embedded
systems. Some systems use variants that don't meet branding requirements,