From: Vladimir Oltean <olteanv@gmail.com>
To: broonie@kernel.org
Cc: linux-spi@vger.kernel.org, linux-kernel@vger.kernel.org,
shawnguo@kernel.org, robh+dt@kernel.org, mark.rutland@arm.com,
devicetree@vger.kernel.org, eha@deif.com, angelo@sysam.it,
andrew.smirnov@gmail.com, gustavo@embeddedor.com,
weic@nvidia.com, mhosny@nvidia.com, michael@walle.cc,
peng.ma@nxp.com
Subject: [PATCH 1/6] spi: spi-fsl-dspi: Don't access reserved fields in SPI_MCR
Date: Mon, 9 Mar 2020 16:56:19 +0200 [thread overview]
Message-ID: <20200309145624.10026-2-olteanv@gmail.com> (raw)
In-Reply-To: <20200309145624.10026-1-olteanv@gmail.com>
From: Vladimir Oltean <vladimir.oltean@nxp.com>
The SPI_MCR_PCSIS macro assumes that the controller has a number of chip
select signals equal to 6. That is not always the case, but actually is
described through the driver-specific " signals equal to 6. That is not
always the case, but actually is described through the driver-specific
"spi-num-chipselects" device tree binding. LS1028A for example only has
4 chip selects.
Don't write to the upper bits of the PCSIS field, which are reserved in
the reference manual.
Fixes: 349ad66c0ab0 ("spi:Add Freescale DSPI driver for Vybrid VF610 platform")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
---
drivers/spi/spi-fsl-dspi.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/spi/spi-fsl-dspi.c b/drivers/spi/spi-fsl-dspi.c
index 0683a3fbd48c..0ce26c1cbf62 100644
--- a/drivers/spi/spi-fsl-dspi.c
+++ b/drivers/spi/spi-fsl-dspi.c
@@ -22,7 +22,7 @@
#define SPI_MCR 0x00
#define SPI_MCR_MASTER BIT(31)
-#define SPI_MCR_PCSIS (0x3F << 16)
+#define SPI_MCR_PCSIS(x) ((x) << 16)
#define SPI_MCR_CLR_TXF BIT(11)
#define SPI_MCR_CLR_RXF BIT(10)
#define SPI_MCR_XSPI BIT(3)
@@ -1197,7 +1197,10 @@ static const struct regmap_config dspi_xspi_regmap_config[] = {
static void dspi_init(struct fsl_dspi *dspi)
{
- unsigned int mcr = SPI_MCR_PCSIS;
+ unsigned int mcr;
+
+ /* Set idle states for all chip select signals to high */
+ mcr = SPI_MCR_PCSIS(GENMASK(dspi->ctlr->num_chipselect - 1, 0));
if (dspi->devtype_data->trans_mode == DSPI_XSPI_MODE)
mcr |= SPI_MCR_XSPI;
--
2.17.1
next prev parent reply other threads:[~2020-03-09 14:56 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-09 14:56 [PATCH 0/6] NXP DSPI bugfixes and support for LS1028A Vladimir Oltean
2020-03-09 14:56 ` Vladimir Oltean [this message]
[not found] ` <20200309145624.10026-2-olteanv-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2020-03-09 18:05 ` [PATCH 1/6] spi: spi-fsl-dspi: Don't access reserved fields in SPI_MCR Michael Walle
[not found] ` <c35b3c34123b43b26204a2cf360e7ec1-QKn5cuLxLXY@public.gmane.org>
2020-03-09 18:09 ` Vladimir Oltean
2020-03-09 14:56 ` [PATCH 2/6] spi: spi-fsl-dspi: Fix little endian access to PUSHR CMD and TXDATA Vladimir Oltean
[not found] ` <20200309145624.10026-3-olteanv-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2020-03-09 17:59 ` Michael Walle
[not found] ` <d8e39e402328b962cdbc25316a27eac8-QKn5cuLxLXY@public.gmane.org>
2020-03-09 18:07 ` Vladimir Oltean
[not found] ` <CA+h21hp4vC1c00rCgZo_hwQz3cE4dLBHjcgTHvf-+fS9a9VfxQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2020-03-09 18:19 ` Michael Walle
[not found] ` <a709dc91aac9124ed37ac1e7fcb7e105-QKn5cuLxLXY@public.gmane.org>
2020-03-09 18:31 ` Vladimir Oltean
2020-03-09 14:56 ` [PATCH 4/6] spi: spi-fsl-dspi: Add support for LS1028A Vladimir Oltean
[not found] ` <20200309145624.10026-5-olteanv-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2020-03-09 18:38 ` Michael Walle
[not found] ` <02a2816d2f39bf621dfee543ed612ae0-QKn5cuLxLXY@public.gmane.org>
2020-03-09 18:51 ` Vladimir Oltean
[not found] ` <20200309145624.10026-1-olteanv-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2020-03-09 14:56 ` [PATCH 3/6] spi: spi-fsl-dspi: Fix oper_word_size of zero for DMA mode Vladimir Oltean
2020-03-09 14:56 ` [PATCH 5/6] arm64: dts: ls1028a: Specify the DMA channels for the DSPI controllers Vladimir Oltean
[not found] ` <20200309145624.10026-6-olteanv-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2020-03-09 19:06 ` Michael Walle
[not found] ` <83af52172a3cabd662de1ed9574e4247-QKn5cuLxLXY@public.gmane.org>
2020-03-09 19:59 ` Vladimir Oltean
2020-03-09 20:17 ` Michael Walle
2020-03-09 14:56 ` [PATCH 6/6] arm64: dts: ls1028a-rdb: Add a spidev node for the mikroBUS Vladimir Oltean
[not found] ` <20200309145624.10026-7-olteanv-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2020-03-09 18:35 ` Michael Walle
[not found] ` <f213388d924b63d0fe265a2d731647be-QKn5cuLxLXY@public.gmane.org>
2020-03-09 18:50 ` Vladimir Oltean
[not found] ` <CA+h21hqOhM9+k9cKXoA8coYpxNFWpgD+FjETeB6uWLbsfrx0uw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2020-03-09 18:58 ` Michael Walle
2020-03-09 18:03 ` [PATCH 0/6] NXP DSPI bugfixes and support for LS1028A Michael Walle
[not found] ` <f530a0740f34b2cf26a8055d4eae2527-QKn5cuLxLXY@public.gmane.org>
2020-03-09 18:14 ` Vladimir Oltean
2020-03-09 18:31 ` Michael Walle
2020-03-09 18:48 ` Vladimir Oltean
[not found] ` <CA+h21hopP2XTx55iu_pG=xBx-TSPRBbdmoU7T2F0Gc9Qt=CsSQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2020-03-09 18:59 ` Michael Walle
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