From: Esben Haabendal <esben.haabendal@gmail.com>
To: Chuanhua Han <chuanhua.han@nxp.com>
Cc: broonie@kernel.org, linux-spi@vger.kernel.org,
linux-kernel@vger.kernel.org, boris.brezillon@bootlin.com
Subject: Re: [PATCH v2 2/4] spi: spi-fsl-dspi: Fix delete the processing of undefined bitmask for rxdata
Date: Sun, 30 Sep 2018 12:29:14 +0200 [thread overview]
Message-ID: <87ftxr6zyd.fsf@gmail.com> (raw)
In-Reply-To: <20180930092535.24544-2-chuanhua.han@nxp.com> (Chuanhua Han's message of "Sun, 30 Sep 2018 17:25:33 +0800")
Chuanhua Han <chuanhua.han@nxp.com> writes:
> This patch fixes the problem of rxdata being equal to 0 during the XSPI
> mode transfer of the dspi controller.
> In XSPI mode, If it is not deleted, the value of rxdata will be equal
> to 0, and the data received will not be received correctly, causing the
> receiving transfer of the spi to fail.
>
> Signed-off-by: Chuanhua Han <chuanhua.han@nxp.com>
> ---
> Changes in v2:
> -The original patch is divided into multiple patches(the original
> patch theme is "spi: spi-fsl-dspi: Fix support for XSPI transport
> mode"),one of which is segmented.
>
> drivers/spi/spi-fsl-dspi.c | 3 ---
> 1 file changed, 3 deletions(-)
>
> diff --git a/drivers/spi/spi-fsl-dspi.c b/drivers/spi/spi-fsl-dspi.c
> index 3082e72e4f6c..4dc1064bf408 100644
> --- a/drivers/spi/spi-fsl-dspi.c
> +++ b/drivers/spi/spi-fsl-dspi.c
> @@ -243,9 +243,6 @@ static void dspi_push_rx(struct fsl_dspi *dspi, u32 rxdata)
> if (!dspi->rx)
> return;
>
> - /* Mask of undefined bits */
> - rxdata &= (1 << dspi->bits_per_word) - 1;
What is the dspi->bits_per_word value when your rxdata is set equal to
0? Could this perhaps also be related to byte ordering problems?
> if (dspi->bytes_per_word == 1)
> *(u8 *)dspi->rx = rxdata;
> else if (dspi->bytes_per_word == 2)
/Esben
next prev parent reply other threads:[~2018-09-30 10:29 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-30 9:25 [PATCH v2 1/4] spi: spi-mem: Add the spi_set_xfer_bpw function Chuanhua Han
2018-09-30 9:25 ` [PATCH v2 2/4] spi: spi-fsl-dspi: Fix delete the processing of undefined bitmask for rxdata Chuanhua Han
2018-09-30 10:06 ` Boris Brezillon
2018-09-30 10:10 ` Chuanhua Han
2018-09-30 10:17 ` Boris Brezillon
2018-09-30 10:37 ` Chuanhua Han
2018-09-30 10:37 ` Esben Haabendal
2018-09-30 10:41 ` Boris Brezillon
2018-09-30 10:29 ` Esben Haabendal [this message]
2018-09-30 9:25 ` [PATCH v2 3/4] spi: spi-fsl-dspi: Fix cmd_fifo is written before tx_fifo Chuanhua Han
2018-09-30 10:30 ` Esben Haabendal
2018-09-30 9:25 ` [PATCH v2 4/4] spi: spi-fsl-dspi: Fix adjust the byte order when sending and receiving data Chuanhua Han
2018-09-30 10:27 ` Esben Haabendal
2018-09-30 10:04 ` [PATCH v2 1/4] spi: spi-mem: Add the spi_set_xfer_bpw function Boris Brezillon
2018-09-30 10:17 ` Esben Haabendal
2018-09-30 10:40 ` Chuanhua Han
2018-09-30 10:18 ` Chuanhua Han
2018-09-30 10:40 ` Boris Brezillon
2018-09-30 10:48 ` Chuanhua Han
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