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In addition, it addresses review comments from the previous review round as follows: - Removes nvidia,slices property. This was not necessary as it is a constant value and can be hardcoded inside the driver code. - Adds nvidia,gpio-controller property. This simplifies how GTE driver retrieves GPIO controller instance, see below explanation. Without this property code would look like: if (of_device_is_compatible(dev->of_node, "nvidia,tegra194-gte-aon")) hte_dev->c = gpiochip_find("tegra194-gpio-aon", tegra_get_gpiochip_from_name); else if (of_device_is_compatible(dev->of_node, "nvidia,tegra234-gte-aon")) hte_dev->c = gpiochip_find("tegra234-gpio-aon", tegra_get_gpiochip_from_name); else return -ENODEV; This means for every future addition of the compatible string, if else condition statements have to be expanded. With the property: gpio_ctrl = of_parse_phandle(dev->of_node, "nvidia,gpio-controller", 0); .... hte_dev->c = gpiochip_find(gpio_ctrl, tegra_get_gpiochip_from_of_node); We haven't technically started making use of these bindings, so backwards-compatibility shouldn't be an issue yet. Signed-off-by: Dipen Patel --- v2: - Removed nvidia,slices property - Added nvidia,gpio-controller based on review comments from Thierry, this will help simplify the hte provider driver. v3: - Explained changes in detail in commit message - Added allOf section per review comment .../timestamp/nvidia,tegra194-hte.yaml | 31 ++++++++++++------- 1 file changed, 20 insertions(+), 11 deletions(-) diff --git a/Documentation/devicetree/bindings/timestamp/nvidia,tegra194-hte.yaml b/Documentation/devicetree/bindings/timestamp/nvidia,tegra194-hte.yaml index c31e207d1652..eb904ac2f331 100644 --- a/Documentation/devicetree/bindings/timestamp/nvidia,tegra194-hte.yaml +++ b/Documentation/devicetree/bindings/timestamp/nvidia,tegra194-hte.yaml @@ -4,7 +4,7 @@ $id: http://devicetree.org/schemas/timestamp/nvidia,tegra194-hte.yaml# $schema: http://devicetree.org/meta-schemas/core.yaml# -title: Tegra194 on chip generic hardware timestamping engine (HTE) +title: Tegra on chip generic hardware timestamping engine (HTE) provider maintainers: - Dipen Patel @@ -23,6 +23,8 @@ properties: enum: - nvidia,tegra194-gte-aon - nvidia,tegra194-gte-lic + - nvidia,tegra234-gte-aon + - nvidia,tegra234-gte-lic reg: maxItems: 1 @@ -38,14 +40,11 @@ properties: minimum: 1 maximum: 256 - nvidia,slices: - $ref: /schemas/types.yaml#/definitions/uint32 + nvidia,gpio-controller: + $ref: /schemas/types.yaml#/definitions/phandle description: - HTE lines are arranged in 32 bit slice where each bit represents different - line/signal that it can enable/configure for the timestamp. It is u32 - property and depends on the HTE instance in the chip. The value 3 is for - GPIO GTE and 11 for IRQ GTE. - enum: [3, 11] + The phandle to AON gpio controller instance. This is required to handle + namespace conversion between GPIO and GTE. '#timestamp-cells': description: @@ -59,9 +58,20 @@ required: - compatible - reg - interrupts - - nvidia,slices - "#timestamp-cells" +allOf: + - if: + properties: + compatible: + contains: + enum: + - nvidia,tegra194-gte-aon + - nvidia,tegra234-gte-aon + then: + required: + - nvidia,gpio-controller + additionalProperties: false examples: @@ -71,7 +81,7 @@ examples: reg = <0xc1e0000 0x10000>; interrupts = <0 13 0x4>; nvidia,int-threshold = <1>; - nvidia,slices = <3>; + nvidia,gpio-controller = <&gpio_aon>; #timestamp-cells = <1>; }; @@ -81,7 +91,6 @@ examples: reg = <0x3aa0000 0x10000>; interrupts = <0 11 0x4>; nvidia,int-threshold = <1>; - nvidia,slices = <11>; #timestamp-cells = <1>; };