On Thu, Dec 09, 2021 at 08:35:20PM +0530, Akhil R wrote:

Tegra I2C can use a gpio as an smbus-alert. Document the usage of the same.

Signed-off-by: Akhil R akhilrajeev@nvidia.com

Documentation/devicetree/bindings/i2c/nvidia,tegra20-i2c.txt | 4 ++++ 1 file changed, 4 insertions(+)

diff --git a/Documentation/devicetree/bindings/i2c/nvidia,tegra20-i2c.txt b/Documentation/devicetree/bindings/i2c/nvidia,tegra20-i2c.txt index 3f2f990..71ee79b 100644 --- a/Documentation/devicetree/bindings/i2c/nvidia,tegra20-i2c.txt +++ b/Documentation/devicetree/bindings/i2c/nvidia,tegra20-i2c.txt @@ -70,6 +70,10 @@ Required properties:

• rx
• tx

+optional properties: +- smbalert-gpio: Must contain an entry for the gpio to be used as smbus alert.

• It will be used only if optional smbus-alert property is present.

There's already a standard way to do this with interrupts. And GPIOs can be interrupts usually.

Example: i2c@7000c000 { -- 2.7.4