| Message ID | 1394553635-12134-1-git-send-email-s.nawrocki@samsung.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Hi Sylwester, Thank you for the patch. On Tuesday 11 March 2014 17:00:35 Sylwester Nawrocki wrote: > This patch documents following updates of the Exynos4 SoC camera subsystem > devicetree binding: > > - addition of #clock-cells and clock-output-names properties to 'camera' > node - these are now needed so the image sensor sub-devices can reference > clocks provided by the camera host interface, > - dropped a note about required clock-frequency properties at the > image sensor nodes; the sensor devices can now control their clock > explicitly through the clk API and there is no need to require this > property in the camera host interface binding. > > Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com> > --- > Resending only single patch which changed. > > Changes since v6: > - #clock-cells, clock-output-names documented as mandatory properties; > - renamed "cam_mclk_{a,b}" to "cam_{a,b}_clkout in the example dts, > this now matches changes in exynos4.dtsi further in the patch series; > - marked "samsung,camclk-out" property as deprecated. > > Changes since v5: > - none. > > Changes since v4: > - dropped a requirement of specific order of values in clocks/ > clock-names properties (Mark) and reference to clock-names in > clock-output-names property description (Mark). > --- > .../devicetree/bindings/media/samsung-fimc.txt | 46 > +++++++++++++------- 1 file changed, 31 insertions(+), 15 deletions(-) > > diff --git a/Documentation/devicetree/bindings/media/samsung-fimc.txt > b/Documentation/devicetree/bindings/media/samsung-fimc.txt index > 96312f6..1908a5f 100644 > --- a/Documentation/devicetree/bindings/media/samsung-fimc.txt > +++ b/Documentation/devicetree/bindings/media/samsung-fimc.txt [snip] > Image sensor nodes > ------------------ > @@ -97,8 +108,8 @@ Image sensor nodes > The sensor device nodes should be added to their control bus controller > (e.g. I2C0) nodes and linked to a port node in the csis or the > parallel-ports node, using the common video interfaces bindings, defined in > video-interfaces.txt. > -The implementation of this bindings requires clock-frequency property to be > -present in the sensor device nodes. > +An optional clock-frequency property needs to be present in the sensor > device > +nodes. Default value when this property is not present is 24 MHz. I think you forgot to drop that sentence.
Hi Laurent, On 11/03/14 17:20, Laurent Pinchart wrote: >> Image sensor nodes >> > ------------------ >> > @@ -97,8 +108,8 @@ Image sensor nodes >> > The sensor device nodes should be added to their control bus controller >> > (e.g. I2C0) nodes and linked to a port node in the csis or the >> > parallel-ports node, using the common video interfaces bindings, defined in >> > video-interfaces.txt. >> > -The implementation of this bindings requires clock-frequency property to be >> > -present in the sensor device nodes. >> > +An optional clock-frequency property needs to be present in the sensor >> > device >> > +nodes. Default value when this property is not present is 24 MHz. > > I think you forgot to drop that sentence. Indeed, sorry, I'll fix that and repost. -- Thanks, Sylwester -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/Documentation/devicetree/bindings/media/samsung-fimc.txt b/Documentation/devicetree/bindings/media/samsung-fimc.txt index 96312f6..1908a5f 100644 --- a/Documentation/devicetree/bindings/media/samsung-fimc.txt +++ b/Documentation/devicetree/bindings/media/samsung-fimc.txt @@ -15,11 +15,21 @@ Common 'camera' node Required properties: -- compatible : must be "samsung,fimc", "simple-bus" -- clocks : list of clock specifiers, corresponding to entries in - the clock-names property; -- clock-names : must contain "sclk_cam0", "sclk_cam1", "pxl_async0", - "pxl_async1" entries, matching entries in the clocks property. +- compatible: must be "samsung,fimc", "simple-bus" +- clocks: list of clock specifiers, corresponding to entries in + the clock-names property; +- clock-names : must contain "sclk_cam0", "sclk_cam1", "pxl_async0", + "pxl_async1" entries, matching entries in the clocks property. + +- #clock-cells: from the common clock bindings (../clock/clock-bindings.txt), + must be 1. A clock provider is associated with the 'camera' node and it should + be referenced by external sensors that use clocks provided by the SoC on + CAM_*_CLKOUT pins. The clock specifier cell stores an index of a clock. + The indices are 0, 1 for CAM_A_CLKOUT, CAM_B_CLKOUT clocks respectively. + +- clock-output-names: from the common clock bindings, should contain names of + clocks registered by the camera subsystem corresponding to CAM_A_CLKOUT, + CAM_B_CLKOUT output clocks respectively. The pinctrl bindings defined in ../pinctrl/pinctrl-bindings.txt must be used to define a required pinctrl state named "default" and optional pinctrl states: @@ -32,6 +42,7 @@ way around. The 'camera' node must include at least one 'fimc' child node. + 'fimc' device nodes ------------------- @@ -88,8 +99,8 @@ port nodes specifies data input - 0, 1 indicates input A, B respectively. Optional properties -- samsung,camclk-out : specifies clock output for remote sensor, - 0 - CAM_A_CLKOUT, 1 - CAM_B_CLKOUT; +- samsung,camclk-out (deprecated) : specifies clock output for remote sensor, + 0 - CAM_A_CLKOUT, 1 - CAM_B_CLKOUT; Image sensor nodes ------------------ @@ -97,8 +108,8 @@ Image sensor nodes The sensor device nodes should be added to their control bus controller (e.g. I2C0) nodes and linked to a port node in the csis or the parallel-ports node, using the common video interfaces bindings, defined in video-interfaces.txt. -The implementation of this bindings requires clock-frequency property to be -present in the sensor device nodes. +An optional clock-frequency property needs to be present in the sensor device +nodes. Default value when this property is not present is 24 MHz. Example: @@ -114,7 +125,7 @@ Example: vddio-supply = <...>; clock-frequency = <24000000>; - clocks = <...>; + clocks = <&camera 1>; clock-names = "mclk"; port { @@ -135,7 +146,7 @@ Example: vddio-supply = <...>; clock-frequency = <24000000>; - clocks = <...>; + clocks = <&camera 0>; clock-names = "mclk"; port { @@ -149,12 +160,17 @@ Example: camera { compatible = "samsung,fimc", "simple-bus"; - #address-cells = <1>; - #size-cells = <1>; - status = "okay"; - + clocks = <&clock 132>, <&clock 133>, <&clock 351>, + <&clock 352>; + clock-names = "sclk_cam0", "sclk_cam1", "pxl_async0", + "pxl_async1"; + #clock-cells = <1>; + clock-output-names = "cam_a_clkout", "cam_b_clkout"; pinctrl-names = "default"; pinctrl-0 = <&cam_port_a_clk_active>; + status = "okay"; + #address-cells = <1>; + #size-cells = <1>; /* parallel camera ports */ parallel-ports {
This patch documents following updates of the Exynos4 SoC camera subsystem devicetree binding: - addition of #clock-cells and clock-output-names properties to 'camera' node - these are now needed so the image sensor sub-devices can reference clocks provided by the camera host interface, - dropped a note about required clock-frequency properties at the image sensor nodes; the sensor devices can now control their clock explicitly through the clk API and there is no need to require this property in the camera host interface binding. Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com> --- Resending only single patch which changed. Changes since v6: - #clock-cells, clock-output-names documented as mandatory properties; - renamed "cam_mclk_{a,b}" to "cam_{a,b}_clkout in the example dts, this now matches changes in exynos4.dtsi further in the patch series; - marked "samsung,camclk-out" property as deprecated. Changes since v5: - none. Changes since v4: - dropped a requirement of specific order of values in clocks/ clock-names properties (Mark) and reference to clock-names in clock-output-names property description (Mark). --- .../devicetree/bindings/media/samsung-fimc.txt | 46 +++++++++++++------- 1 file changed, 31 insertions(+), 15 deletions(-) -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html