| Message ID | 20231013141925.3427158-3-hugo@hugovil.com |
|---|---|
| State | New |
| Headers | show |
| Series | serial: sc16is7xx: device tree improvements | expand |
On Mon, 16 Oct 2023 08:09:56 +0200 Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> wrote: > On 13/10/2023 16:19, Hugo Villeneuve wrote: > > From: Hugo Villeneuve <hvilleneuve@dimonoff.com> > > > > The 'clock-frequency' property is supported but mainly in ACPI-based > > configurations, for example. > > > > This property has therefore no place in the sc16is7xx YAML binding. > > Please reference commit which you question - 0d447e927. I don't > understand why do you remove it. The property was in the original binding. Hi, in the max310x YAML conversion review (last week), you told me to drop the clock-frequency from the binding, even if it is supported by the driver, since it is related to ACPI configuration, not DT. The sc16is7xx driver (IC) is very similar to the max310x, and it also supports the clock-frequency property, and I just assumed that its presence in the original text binding was some kind of error or legacy leftover, and would need to be removed based on your comments. Just as a reference, here are the original commits in both drivers that added support for the clock-frequency property: ----------------------- commit d4d6f03c4fb3a91dadfe147b47edd40e4d7e4d36 Author: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Date: Mon May 17 20:29:30 2021 +0300 serial: max310x: Try to get crystal clock rate from property In some configurations, mainly ACPI-based, the clock frequency of the device is supplied by very well established 'clock-frequency' property. Hence, try to get it from the property at last if no other providers are available. commit 24bc6e68efa00f95034dbef0ba91661dd80bd37d Author: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Date: Mon Mar 18 12:29:15 2019 +0200 serial: sc16is7xx: Respect clock-frequency property If the property is provided and there are no other possibilities to detect UART clock frequency, use it as a fallback. ----------------------- Hugo.
On 16/10/2023 15:58, Hugo Villeneuve wrote: > On Mon, 16 Oct 2023 08:09:56 +0200 > Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> wrote: > >> On 13/10/2023 16:19, Hugo Villeneuve wrote: >>> From: Hugo Villeneuve <hvilleneuve@dimonoff.com> >>> >>> The 'clock-frequency' property is supported but mainly in ACPI-based >>> configurations, for example. >>> >>> This property has therefore no place in the sc16is7xx YAML binding. >> >> Please reference commit which you question - 0d447e927. I don't >> understand why do you remove it. The property was in the original binding. > > Hi, > in the max310x YAML conversion review (last week), you told me to > drop the clock-frequency from the binding, even > if it is supported by the driver, since it is related to ACPI > configuration, not DT. Yes, when we talked about max310x. > > The sc16is7xx driver (IC) is very similar to the max310x, and it also > supports the clock-frequency property, and I just assumed that its > presence in the original text binding was some kind of error or legacy > leftover, and would need to be removed based on your comments. But that is not the same and not accurate. clock-frequency was described by the binding. > > Just as a reference, here are the original commits in both drivers that > added support for the clock-frequency property: > > ----------------------- > commit d4d6f03c4fb3a91dadfe147b47edd40e4d7e4d36 > Author: Andy Shevchenko <andriy.shevchenko@linux.intel.com> > Date: Mon May 17 20:29:30 2021 +0300 > > serial: max310x: Try to get crystal clock rate from property > > In some configurations, mainly ACPI-based, the clock frequency of > the device is supplied by very well established 'clock-frequency' > property. Hence, try to get it from the property at last if no other > providers are available. > > > commit 24bc6e68efa00f95034dbef0ba91661dd80bd37d > Author: Andy Shevchenko <andriy.shevchenko@linux.intel.com> > Date: Mon Mar 18 12:29:15 2019 +0200 > > serial: sc16is7xx: Respect clock-frequency property > > If the property is provided and there are no other possibilities to > detect UART clock frequency, use it as a fallback. > ----------------------- These are driver changes. Best regards, Krzysztof
diff --git a/Documentation/devicetree/bindings/serial/nxp,sc16is7xx.yaml b/Documentation/devicetree/bindings/serial/nxp,sc16is7xx.yaml index 5dec15b7e7c3..5050176e8b80 100644 --- a/Documentation/devicetree/bindings/serial/nxp,sc16is7xx.yaml +++ b/Documentation/devicetree/bindings/serial/nxp,sc16is7xx.yaml @@ -28,13 +28,6 @@ properties: clocks: maxItems: 1 - clock-frequency: - description: - When there is no clock provider visible to the platform, this - is the source crystal or external clock frequency for the IC in Hz. - minimum: 1 - maximum: 80000000 - gpio-controller: true "#gpio-cells": @@ -74,18 +67,13 @@ required: - compatible - reg - interrupts + - clocks allOf: - $ref: /schemas/spi/spi-peripheral-props.yaml# - $ref: /schemas/serial/serial.yaml# - $ref: /schemas/serial/rs485.yaml# -oneOf: - - required: - - clocks - - required: - - clock-frequency - unevaluatedProperties: false examples: