From c116fe1e1883ad3eda0a1938a9e3275a98aa51a5 Mon Sep 17 00:00:00 2001 From: Deep Majumder Date: Fri, 19 Nov 2021 11:44:01 +0530 Subject: [PATCH] Docs: Fixes link to I2C specification The link to the I2C specification is broken. Although "https://www.nxp.com" hosts Rev 7 (2021) of this specification, it is behind a login-wall. Thus, an additional link has been added (which doesn't require a login) and the NXP official docs link has been updated. Signed-off-by: Deep Majumder [wsa: minor updates to text and commit message] Signed-off-by: Wolfram Sang --- Documentation/i2c/summary.rst | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/Documentation/i2c/summary.rst b/Documentation/i2c/summary.rst index 136c4e333be7..786c618ba3be 100644 --- a/Documentation/i2c/summary.rst +++ b/Documentation/i2c/summary.rst @@ -11,9 +11,11 @@ systems. Some systems use variants that don't meet branding requirements, and so are not advertised as being I2C but come under different names, e.g. TWI (Two Wire Interface), IIC. -The official I2C specification is the `"I2C-bus specification and user -manual" (UM10204) `_ -published by NXP Semiconductors. +The latest official I2C specification is the `"I2C-bus specification and user +manual" (UM10204) `_ +published by NXP Semiconductors. However, you need to log-in to the site to +access the PDF. An older version of the specification (revision 6) is archived +`here `_. SMBus (System Management Bus) is based on the I2C protocol, and is mostly a subset of I2C protocols and signaling. Many I2C devices will work on an