Re: [PATCH v3 1/4] media: dt-bindings: media: i2c: Switch to assigned-clock-rates
From: Maxime Ripard <hidden>
Date: 2020-03-19 12:45:00
Also in:
linux-devicetree, linux-media, linux-renesas-soc, lkml
Hi, On Fri, Mar 13, 2020 at 09:12:31PM +0000, Lad Prabhakar wrote:
quoted hunk ↗ jump to hunk
Use assigned-clock-rates to specify the clock rate. Also mark clock-frequency property as deprecated. Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com> --- Documentation/devicetree/bindings/media/i2c/ov5645.txt | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)diff --git a/Documentation/devicetree/bindings/media/i2c/ov5645.txt b/Documentation/devicetree/bindings/media/i2c/ov5645.txt index 72ad992..e62fe82 100644 --- a/Documentation/devicetree/bindings/media/i2c/ov5645.txt +++ b/Documentation/devicetree/bindings/media/i2c/ov5645.txt@@ -8,7 +8,7 @@ Required Properties: - compatible: Value should be "ovti,ov5645". - clocks: Reference to the xclk clock. - clock-names: Should be "xclk". -- clock-frequency: Frequency of the xclk clock. +- clock-frequency (deprecated): Frequency of the xclk clock. - enable-gpios: Chip enable GPIO. Polarity is GPIO_ACTIVE_HIGH. This corresponds to the hardware pin PWDNB which is physically active low. - reset-gpios: Chip reset GPIO. Polarity is GPIO_ACTIVE_LOW. This corresponds to@@ -37,7 +37,8 @@ Example: clocks = <&clks 200>; clock-names = "xclk"; - clock-frequency = <24000000>; + assigned-clocks = <&clks 200>; + assigned-clock-rates = <24000000>; vdddo-supply = <&camera_dovdd_1v8>; vdda-supply = <&camera_avdd_2v8>;
clock-frequency is quite different from assigned-clock-rates though, semantically speaking. clock-frequency is only about what the clock frequency is, while assigned-clock-rates will change the rate as well, and you have no idea how long it will last. If you want to retrieve that through the clock framework, then just making clock-frequency optional is enough and falling back to clk_get_rate on the clocks property already provided is enough. Maxime