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

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Date: Thu, 20 Jun 2024 12:58:27 -0400
From: Frank Li <Frank.Li@....com>
To: 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-kernel@...r.kernel.org, 
 devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 imx@...ts.linux.dev, Frank Li <Frank.Li@....com>
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)
+			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)
+			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