From: Wolfram Sang <wsa+renesas@sang-engineering.com>
To: Vladimir Kondratiev <Vladimir.Kondratiev@mobileye.com>
Cc: "linux-i2c@vger.kernel.org" <linux-i2c@vger.kernel.org>
Subject: Re: [RFC] Handle targets with different speed by the same I2C master
Date: Tue, 8 Apr 2025 13:53:18 +0200 [thread overview]
Message-ID: <Z_UOLq4OZsrliH5T@ninjato> (raw)
In-Reply-To: <AS2PR09MB629642F8FF0F7CD6F3498E8C94B52@AS2PR09MB6296.eurprd09.prod.outlook.com>
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> We have a design where several I2C targets with different maximum speed capability
> connected to the same I2C bus managed by one I2C master.
> We want to communicate with each target with its speed. However there is no way to
> specify the bus speed for the I2C message.
Rightfully so. Devices with a lower max_freq may get confused and block
the bus if you operate at a higher freq. You have to live with the
lowest max_freq. Or put the slow devices to another adapter. Or behind a
mux. Something like this.
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next prev parent reply other threads:[~2025-04-08 11:53 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-04-08 10:11 [RFC] Handle targets with different speed by the same I2C master Vladimir Kondratiev
2025-04-08 11:53 ` Wolfram Sang [this message]
2025-04-09 13:52 ` Vladimir Kondratiev
2025-04-10 10:15 ` Wolfram Sang
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