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Message-Id: <20240624-ls_qspi-v4-1-3d1c6f5005bf@nxp.com>
Date: Mon, 24 Jun 2024 14:55:27 -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 v4 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>
---
Change from v3 to v4
- check spi_delay_to_ns() return value, which may return negative value as
error code. It will be very big value when cast to u32.
---
drivers/spi/spi-fsl-dspi.c | 19 ++++++++++++++-----
1 file changed, 14 insertions(+), 5 deletions(-)
diff --git a/drivers/spi/spi-fsl-dspi.c b/drivers/spi/spi-fsl-dspi.c
index 0a2730cd07c6a..191de1917f831 100644
--- a/drivers/spi/spi-fsl-dspi.c
+++ b/drivers/spi/spi-fsl-dspi.c
@@ -1006,6 +1006,7 @@ static int dspi_setup(struct spi_device *spi)
struct chip_data *chip;
unsigned long clkrate;
bool cs = true;
+ int val;
/* Only alloc on first setup */
chip = spi_get_ctldata(spi);
@@ -1018,11 +1019,19 @@ 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);
+ val = spi_delay_to_ns(&spi->cs_setup, NULL);
+ cs_sck_delay = val >= 0 ? val : 0;
+ if (!cs_sck_delay)
+ of_property_read_u32(spi->dev.of_node,
+ "fsl,spi-cs-sck-delay",
+ &cs_sck_delay);
+
+ val = spi_delay_to_ns(&spi->cs_hold, NULL);
+ sck_cs_delay = val >= 0 ? val : 0;
+ 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
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