From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thierry Reding Subject: [PATCH 1/4] dt-bindings: i2c: tegra: Document Tegra210 VI I2C Date: Wed, 6 May 2020 21:15:08 +0200 Message-ID: <20200506191511.2791107-2-thierry.reding@gmail.com> References: <20200506191511.2791107-1-thierry.reding@gmail.com> Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Return-path: In-Reply-To: <20200506191511.2791107-1-thierry.reding-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> Sender: linux-tegra-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Wolfram Sang , Thierry Reding Cc: Jon Hunter , linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: linux-tegra@vger.kernel.org From: Thierry Reding The Tegra210 features an instance of the Tegra I2C controller that is part of the host1x domain and typically used for camera use-cases. It uses pretty much the same programming model but the registers are laid out differently. Signed-off-by: Thierry Reding --- .../devicetree/bindings/i2c/nvidia,tegra20-i2c.txt | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/Documentation/devicetree/bindings/i2c/nvidia,tegra20-i2c.txt b/Documentation/devicetree/bindings/i2c/nvidia,tegra20-i2c.txt index f64064f8bdc2..18c0de362451 100644 --- a/Documentation/devicetree/bindings/i2c/nvidia,tegra20-i2c.txt +++ b/Documentation/devicetree/bindings/i2c/nvidia,tegra20-i2c.txt @@ -35,6 +35,12 @@ Required properties: Due to above changes, Tegra114 I2C driver makes incompatible with previous hardware driver. Hence, tegra114 I2C controller is compatible with "nvidia,tegra114-i2c". + nvidia,tegra210-i2c-vi: Tegra210 has one I2C controller that is part of the + host1x domain and typically used for camera use-cases. This VI I2C + controller is mostly compatible with the programming model of the + regular I2C controllers with a few exceptions. The I2C registers start + at an offset of 0xc00 (instead of 0), registers are 16 bytes apart + (rather than 4) and the controller does not support slave mode. - reg: Should contain I2C controller registers physical address and length. - interrupts: Should contain I2C controller interrupts. - address-cells: Address cells for I2C device address. -- 2.24.1