linux-kernel - RE: [PATCH v3 1/3] spi: fsl-dspi: use common proptery 'spi-cs-setup(hold)-delay-ns'

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Date: Fri, 21 Jun 2024 01:28:28 +0000
From: Peng Fan <peng.fan@....com>
To: Frank Li <frank.li@....com>, Vladimir Oltean <olteanv@...il.com>, Mark
 Brown <broonie@...nel.org>, Rob Herring <robh@...nel.org>, Krzysztof
 Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, Shawn Guo
	<shawnguo@...nel.org>
CC: "linux-spi@...r.kernel.org" <linux-spi@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org"
	<linux-arm-kernel@...ts.infradead.org>, "imx@...ts.linux.dev"
	<imx@...ts.linux.dev>, Frank Li <frank.li@....com>
Subject: RE: [PATCH v3 1/3] spi: fsl-dspi: use common proptery
 'spi-cs-setup(hold)-delay-ns'

> Subject: [PATCH v3 1/3] spi: fsl-dspi: use common proptery 'spi-cs-
> setup(hold)-delay-ns'
> 
> Use SPI common DT binding properties 'spi-cs-setup-delay-ns' and 'spi-
> cs-hold-delay-ns'. If these properties do not exist, fall back to legacy
> 'fsl,spi-cs-sck-delay' and 'fsl,spi-sck-cs-delay'.
> 
> Signed-off-by: Frank Li <Frank.Li@....com>
> ---
>  drivers/spi/spi-fsl-dspi.c | 14 +++++++++-----
>  1 file changed, 9 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/spi/spi-fsl-dspi.c b/drivers/spi/spi-fsl-dspi.c index
> 0a2730cd07c6a..7c1f8af9d215e 100644
> --- a/drivers/spi/spi-fsl-dspi.c
> +++ b/drivers/spi/spi-fsl-dspi.c
> @@ -1018,11 +1018,15 @@ static int dspi_setup(struct spi_device
> *spi)
>  	pdata = dev_get_platdata(&dspi->pdev->dev);
> 
>  	if (!pdata) {
> -		of_property_read_u32(spi->dev.of_node, "fsl,spi-cs-
> sck-delay",
> -				     &cs_sck_delay);
> -
> -		of_property_read_u32(spi->dev.of_node, "fsl,spi-sck-
> cs-delay",
> -				     &sck_cs_delay);
> +		cs_sck_delay = spi_delay_to_ns(&spi->cs_setup, NULL);
> +		if (!cs_sck_delay)

`if (cs_sck_delay <= 0)` ?

> +			of_property_read_u32(spi->dev.of_node,
> "fsl,spi-cs-sck-delay",
> +					     &cs_sck_delay);
> +
> +		sck_cs_delay = spi_delay_to_ns(&spi->cs_hold, NULL);
> +		if (!sck_cs_delay)

` if (sck_cs_delay <= 0)`?

Regards,
Peng.

> +			of_property_read_u32(spi->dev.of_node,
> "fsl,spi-sck-cs-delay",
> +					     &sck_cs_delay);
>  	} else {
>  		cs_sck_delay = pdata->cs_sck_delay;
>  		sck_cs_delay = pdata->sck_cs_delay;
> 
> --
> 2.34.1
>