From: Mark Brown <broonie@kernel.org>
To: Michael Walle <michael@walle.cc>
Cc: Han Xu <han.xu@nxp.com>,
Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>,
Bough Chen <haibo.chen@nxp.com>,
ashish.kumar@nxp.com, yogeshgaur.83@gmail.com,
robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org,
singh.kuldeep87k@gmail.com, tudor.ambarus@microchip.com,
p.yadav@ti.com, miquel.raynal@bootlin.com, richard@nod.at,
vigneshr@ti.com, shawnguo@kernel.org, s.hauer@pengutronix.de,
kernel@pengutronix.de, linux-spi@vger.kernel.org,
linux-kernel@vger.kernel.org, devicetree@vger.kernel.org,
linux-mtd@lists.infradead.org, festevam@gmail.com,
dl-linux-imx <linux-imx@nxp.com>,
linux-arm-kernel@lists.infradead.org, zhengxunli@mxic.com.tw
Subject: Re: [PATCH 07/11] dt-bindings: spi: spi-nxp-fspi: add a new property nxp,fspi-dll-slvdly
Date: Tue, 5 Jul 2022 16:07:27 +0100 [thread overview]
Message-ID: <YsRTryAlyJjm9A9+@sirena.org.uk> (raw)
In-Reply-To: <d4a69511eea5195b2ee7726bda5a8a33@walle.cc>
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On Tue, Jul 05, 2022 at 04:58:40PM +0200, Michael Walle wrote:
> Am 2022-07-05 16:52, schrieb Han Xu:
> > IMO, use the unit "-degrees" makes it more complicate. Personaly I would
> > calculate how many clock cycle delay needed, such as 1/4 clock cycle or
> > half
> > clock cycle. Using degree brings extra calculation.
> What is the extra calculation here? For hardware engineer who has to
> specify this, it is easier to give the delay in clock phase (in degrees)
> rather than reading the documentation and transform that into a value
> given in 1/32 part of a clock, that should be part of the driver.
IME if it's a hardware engineer specifying things by the time they get
as far as a software engineer they'll often have been turned into "write
these values to these registers".
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http://lists.infradead.org/mailman/listinfo/linux-mtd/
WARNING: multiple messages have this Message-ID (diff)
From: Mark Brown <broonie@kernel.org>
To: Michael Walle <michael@walle.cc>
Cc: Han Xu <han.xu@nxp.com>,
Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>,
Bough Chen <haibo.chen@nxp.com>,
ashish.kumar@nxp.com, yogeshgaur.83@gmail.com,
robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org,
singh.kuldeep87k@gmail.com, tudor.ambarus@microchip.com,
p.yadav@ti.com, miquel.raynal@bootlin.com, richard@nod.at,
vigneshr@ti.com, shawnguo@kernel.org, s.hauer@pengutronix.de,
kernel@pengutronix.de, linux-spi@vger.kernel.org,
linux-kernel@vger.kernel.org, devicetree@vger.kernel.org,
linux-mtd@lists.infradead.org, festevam@gmail.com,
dl-linux-imx <linux-imx@nxp.com>,
linux-arm-kernel@lists.infradead.org, zhengxunli@mxic.com.tw
Subject: Re: [PATCH 07/11] dt-bindings: spi: spi-nxp-fspi: add a new property nxp,fspi-dll-slvdly
Date: Tue, 5 Jul 2022 16:07:27 +0100 [thread overview]
Message-ID: <YsRTryAlyJjm9A9+@sirena.org.uk> (raw)
In-Reply-To: <d4a69511eea5195b2ee7726bda5a8a33@walle.cc>
[-- Attachment #1.1: Type: text/plain, Size: 787 bytes --]
On Tue, Jul 05, 2022 at 04:58:40PM +0200, Michael Walle wrote:
> Am 2022-07-05 16:52, schrieb Han Xu:
> > IMO, use the unit "-degrees" makes it more complicate. Personaly I would
> > calculate how many clock cycle delay needed, such as 1/4 clock cycle or
> > half
> > clock cycle. Using degree brings extra calculation.
> What is the extra calculation here? For hardware engineer who has to
> specify this, it is easier to give the delay in clock phase (in degrees)
> rather than reading the documentation and transform that into a value
> given in 1/32 part of a clock, that should be part of the driver.
IME if it's a hardware engineer specifying things by the time they get
as far as a software engineer they'll often have been turned into "write
these values to these registers".
[-- Attachment #1.2: signature.asc --]
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_______________________________________________
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linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
WARNING: multiple messages have this Message-ID (diff)
From: Mark Brown <broonie@kernel.org>
To: Michael Walle <michael@walle.cc>
Cc: Han Xu <han.xu@nxp.com>,
Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>,
Bough Chen <haibo.chen@nxp.com>,
ashish.kumar@nxp.com, yogeshgaur.83@gmail.com,
robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org,
singh.kuldeep87k@gmail.com, tudor.ambarus@microchip.com,
p.yadav@ti.com, miquel.raynal@bootlin.com, richard@nod.at,
vigneshr@ti.com, shawnguo@kernel.org, s.hauer@pengutronix.de,
kernel@pengutronix.de, linux-spi@vger.kernel.org,
linux-kernel@vger.kernel.org, devicetree@vger.kernel.org,
linux-mtd@lists.infradead.org, festevam@gmail.com,
dl-linux-imx <linux-imx@nxp.com>,
linux-arm-kernel@lists.infradead.org, zhengxunli@mxic.com.tw
Subject: Re: [PATCH 07/11] dt-bindings: spi: spi-nxp-fspi: add a new property nxp,fspi-dll-slvdly
Date: Tue, 5 Jul 2022 16:07:27 +0100 [thread overview]
Message-ID: <YsRTryAlyJjm9A9+@sirena.org.uk> (raw)
In-Reply-To: <d4a69511eea5195b2ee7726bda5a8a33@walle.cc>
[-- Attachment #1: Type: text/plain, Size: 787 bytes --]
On Tue, Jul 05, 2022 at 04:58:40PM +0200, Michael Walle wrote:
> Am 2022-07-05 16:52, schrieb Han Xu:
> > IMO, use the unit "-degrees" makes it more complicate. Personaly I would
> > calculate how many clock cycle delay needed, such as 1/4 clock cycle or
> > half
> > clock cycle. Using degree brings extra calculation.
> What is the extra calculation here? For hardware engineer who has to
> specify this, it is easier to give the delay in clock phase (in degrees)
> rather than reading the documentation and transform that into a value
> given in 1/32 part of a clock, that should be part of the driver.
IME if it's a hardware engineer specifying things by the time they get
as far as a software engineer they'll often have been turned into "write
these values to these registers".
[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 488 bytes --]
next prev parent reply other threads:[~2022-07-05 15:07 UTC|newest]
Thread overview: 99+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-05 9:11 [PATCH 01/11] spi: spi-nxp-fspi: enable runtime pm for fspi haibo.chen
2022-07-05 9:11 ` haibo.chen
2022-07-05 9:11 ` haibo.chen
2022-07-05 9:11 ` [PATCH 02/11] spi: spi-nxp-fspi: change the default lut index haibo.chen
2022-07-05 9:11 ` haibo.chen
2022-07-05 9:11 ` haibo.chen
2022-07-05 9:11 ` [PATCH 03/11] spi: spi-nxp-fspi: add DTR mode support haibo.chen
2022-07-05 9:11 ` haibo.chen
2022-07-05 9:11 ` haibo.chen
2022-07-05 9:11 ` [PATCH 04/11] spi: spi-nxp-fspi: add function to select sample clock source for flash reading haibo.chen
2022-07-05 9:11 ` haibo.chen
2022-07-05 9:11 ` haibo.chen
2022-07-06 21:02 ` Michael Walle
2022-07-06 21:02 ` Michael Walle
2022-07-06 21:02 ` Michael Walle
2022-07-05 9:11 ` [PATCH 05/11] spi: spi-nxp-fspi: Add quirk to disable DTR support haibo.chen
2022-07-05 9:11 ` haibo.chen
2022-07-05 9:11 ` haibo.chen
2022-07-05 13:50 ` Michael Walle
2022-07-05 13:50 ` Michael Walle
2022-07-05 13:50 ` Michael Walle
2022-07-05 9:11 ` [PATCH 06/11] spi: spi-nxp-fspi: enable octal ddr for iMX8QM/QXP/DXL haibo.chen
2022-07-05 9:11 ` haibo.chen
2022-07-05 9:11 ` haibo.chen
2022-07-05 9:11 ` [PATCH 07/11] dt-bindings: spi: spi-nxp-fspi: add a new property nxp,fspi-dll-slvdly haibo.chen
2022-07-05 9:11 ` haibo.chen
2022-07-05 9:11 ` haibo.chen
2022-07-05 9:48 ` Krzysztof Kozlowski
2022-07-05 9:48 ` Krzysztof Kozlowski
2022-07-05 9:48 ` Krzysztof Kozlowski
2022-07-05 10:28 ` Bough Chen
2022-07-05 10:28 ` Bough Chen
2022-07-05 10:28 ` Bough Chen
2022-07-05 10:36 ` Krzysztof Kozlowski
2022-07-05 10:36 ` Krzysztof Kozlowski
2022-07-05 10:36 ` Krzysztof Kozlowski
2022-07-05 13:19 ` Han Xu
2022-07-05 13:19 ` Han Xu
2022-07-05 13:19 ` Han Xu
2022-07-05 13:29 ` Krzysztof Kozlowski
2022-07-05 13:29 ` Krzysztof Kozlowski
2022-07-05 13:29 ` Krzysztof Kozlowski
2022-07-05 14:00 ` Han Xu
2022-07-05 14:00 ` Han Xu
2022-07-05 14:00 ` Han Xu
2022-07-05 14:03 ` Krzysztof Kozlowski
2022-07-05 14:03 ` Krzysztof Kozlowski
2022-07-05 14:03 ` Krzysztof Kozlowski
2022-07-05 14:31 ` Han Xu
2022-07-05 14:31 ` Han Xu
2022-07-05 14:31 ` Han Xu
2022-07-05 14:06 ` Michael Walle
2022-07-05 14:06 ` Michael Walle
2022-07-05 14:06 ` Michael Walle
2022-07-05 14:12 ` Krzysztof Kozlowski
2022-07-05 14:12 ` Krzysztof Kozlowski
2022-07-05 14:12 ` Krzysztof Kozlowski
2022-07-05 14:52 ` Han Xu
2022-07-05 14:52 ` Han Xu
2022-07-05 14:52 ` Han Xu
2022-07-05 14:58 ` Michael Walle
2022-07-05 14:58 ` Michael Walle
2022-07-05 14:58 ` Michael Walle
2022-07-05 15:07 ` Mark Brown [this message]
2022-07-05 15:07 ` Mark Brown
2022-07-05 15:07 ` Mark Brown
2022-07-05 15:38 ` Krzysztof Kozlowski
2022-07-05 15:38 ` Krzysztof Kozlowski
2022-07-05 15:38 ` Krzysztof Kozlowski
2022-07-05 15:50 ` Han Xu
2022-07-05 15:50 ` Han Xu
2022-07-05 15:50 ` Han Xu
2022-07-06 16:11 ` Rob Herring
2022-07-06 16:11 ` Rob Herring
2022-07-06 16:11 ` Rob Herring
2022-07-06 20:59 ` Michael Walle
2022-07-06 20:59 ` Michael Walle
2022-07-06 20:59 ` Michael Walle
2022-07-05 9:11 ` [PATCH 08/11] mtd: spi-nor: macronix: add support for Macronix octaflash haibo.chen
2022-07-05 9:11 ` haibo.chen
2022-07-05 9:11 ` haibo.chen
2022-07-05 9:11 ` [PATCH 09/11] mtd: spi-nor: macronix: add mx25uw51345g OPI mode support haibo.chen
2022-07-05 9:11 ` haibo.chen
2022-07-05 9:11 ` haibo.chen
2022-07-18 6:57 ` Michael Walle
2022-07-18 6:57 ` Michael Walle
2022-07-18 6:57 ` Michael Walle
2022-07-05 9:11 ` [PATCH 10/11] arm64: dts: imx8ulp: add flexspi support haibo.chen
2022-07-05 9:11 ` haibo.chen
2022-07-05 9:11 ` haibo.chen
2022-07-05 9:11 ` [PATCH 11/11] arm64: dts: imx8qm/imx8qxp: " haibo.chen
2022-07-05 9:11 ` haibo.chen
2022-07-05 9:11 ` haibo.chen
2022-07-05 14:01 ` [PATCH 01/11] spi: spi-nxp-fspi: enable runtime pm for fspi Michael Walle
2022-07-05 14:01 ` Michael Walle
2022-07-05 14:01 ` Michael Walle
2022-07-05 23:06 ` Han Xu
2022-07-05 23:06 ` Han Xu
2022-07-05 23:06 ` Han Xu
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