linux-kernel - Re: [PATCH v3 1/5] i2c: xiic: make the clock optional

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Message-ID: <df9e1a39-3928-491a-920f-fd45120d8024@lunn.ch>
Date: Fri, 23 Jan 2026 20:20:06 +0100
From: Andrew Lunn <andrew@...n.ch>
To: abdurrahman@...thop.ai
Cc: Michal Simek <michal.simek@....com>, Andi Shyti <andi.shyti@...nel.org>,
	Andy Shevchenko <andriy.shevchenko@...el.com>,
	linux-arm-kernel@...ts.infradead.org, linux-i2c@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 1/5] i2c: xiic: make the clock optional

On Fri, Jan 23, 2026 at 08:02:44AM +0000, Abdurrahman Hussain via B4 Relay wrote:
> From: Abdurrahman Hussain <abdurrahman@...thop.ai>
> 
> The xiic driver is designed to operate without explicit clock configuration
> when clocks are not specified in the firmware. This functionality is
> already implemented in xiic_setclk(), which performs an early return when
> either i2c_clk or input_clk are zero:
> 
> This condition is satisfied when clocks are missing, as clk_get_rate(NULL)
> returns zero, allowing the driver to rely on hardware-configured timing.

https://elixir.bootlin.com/linux/v6.18.6/source/Documentation/devicetree/bindings/i2c/xlnx,xps-iic-2.00.a.yaml#L42

The binding indicates the clock is required. You need to update the
binding to match the code.

	Andrew