From: Clark Wang <xiaoning.wang@nxp.com> To: broonie@kernel.org, shawnguo@kernel.org, s.hauer@pengutronix.de, festevam@gmail.com Cc: kernel@pengutronix.de, linux-imx@nxp.com, linux-spi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH] spi: imx: add 16/32 bits per word support for slave mode Date: Thu, 8 Apr 2021 18:33:46 +0800 [thread overview] Message-ID: <20210408103347.244313-1-xiaoning.wang@nxp.com> (raw) Enable 16/32 bits per word support for spi-imx slave mode. It only support 8 bits per word in slave mode before. Signed-off-by: Clark Wang <xiaoning.wang@nxp.com> Reviewed-by: Haibo Chen <haibo.chen@nxp.com> --- drivers/spi/spi-imx.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c index 4fe767acaca7..24ba7ab1b05d 100644 --- a/drivers/spi/spi-imx.c +++ b/drivers/spi/spi-imx.c @@ -386,7 +386,12 @@ static void spi_imx_buf_tx_swap(struct spi_imx_data *spi_imx) static void mx53_ecspi_rx_slave(struct spi_imx_data *spi_imx) { - u32 val = be32_to_cpu(readl(spi_imx->base + MXC_CSPIRXDATA)); + u32 val = readl(spi_imx->base + MXC_CSPIRXDATA); + + if (spi_imx->bits_per_word <= 8) + val = be32_to_cpu(val); + else if (spi_imx->bits_per_word <= 16) + val = (val << 16) | (val >> 16); if (spi_imx->rx_buf) { int n_bytes = spi_imx->slave_burst % sizeof(val); @@ -415,7 +420,11 @@ static void mx53_ecspi_tx_slave(struct spi_imx_data *spi_imx) if (spi_imx->tx_buf) { memcpy(((u8 *)&val) + sizeof(val) - n_bytes, spi_imx->tx_buf, n_bytes); - val = cpu_to_be32(val); + if (spi_imx->bits_per_word <= 8) + val = cpu_to_be32(val); + else if (spi_imx->bits_per_word <= 16) + val = (val << 16) | (val >> 16); + spi_imx->tx_buf += n_bytes; } -- 2.25.1
WARNING: multiple messages have this Message-ID (diff)
From: Clark Wang <xiaoning.wang@nxp.com> To: broonie@kernel.org, shawnguo@kernel.org, s.hauer@pengutronix.de, festevam@gmail.com Cc: kernel@pengutronix.de, linux-imx@nxp.com, linux-spi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH] spi: imx: add 16/32 bits per word support for slave mode Date: Thu, 8 Apr 2021 18:33:46 +0800 [thread overview] Message-ID: <20210408103347.244313-1-xiaoning.wang@nxp.com> (raw) Enable 16/32 bits per word support for spi-imx slave mode. It only support 8 bits per word in slave mode before. Signed-off-by: Clark Wang <xiaoning.wang@nxp.com> Reviewed-by: Haibo Chen <haibo.chen@nxp.com> --- drivers/spi/spi-imx.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c index 4fe767acaca7..24ba7ab1b05d 100644 --- a/drivers/spi/spi-imx.c +++ b/drivers/spi/spi-imx.c @@ -386,7 +386,12 @@ static void spi_imx_buf_tx_swap(struct spi_imx_data *spi_imx) static void mx53_ecspi_rx_slave(struct spi_imx_data *spi_imx) { - u32 val = be32_to_cpu(readl(spi_imx->base + MXC_CSPIRXDATA)); + u32 val = readl(spi_imx->base + MXC_CSPIRXDATA); + + if (spi_imx->bits_per_word <= 8) + val = be32_to_cpu(val); + else if (spi_imx->bits_per_word <= 16) + val = (val << 16) | (val >> 16); if (spi_imx->rx_buf) { int n_bytes = spi_imx->slave_burst % sizeof(val); @@ -415,7 +420,11 @@ static void mx53_ecspi_tx_slave(struct spi_imx_data *spi_imx) if (spi_imx->tx_buf) { memcpy(((u8 *)&val) + sizeof(val) - n_bytes, spi_imx->tx_buf, n_bytes); - val = cpu_to_be32(val); + if (spi_imx->bits_per_word <= 8) + val = cpu_to_be32(val); + else if (spi_imx->bits_per_word <= 16) + val = (val << 16) | (val >> 16); + spi_imx->tx_buf += n_bytes; } -- 2.25.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next reply other threads:[~2021-04-08 10:33 UTC|newest] Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-04-08 10:33 Clark Wang [this message] 2021-04-08 10:33 ` [PATCH] spi: imx: add 16/32 bits per word support for slave mode Clark Wang 2021-04-08 10:33 ` [PATCH] spi: imx: add a check for speed_hz before calculating the clock Clark Wang 2021-04-08 10:33 ` Clark Wang 2021-04-08 13:43 ` Mark Brown 2021-04-08 13:43 ` Mark Brown 2021-04-08 14:05 ` Mark Brown 2021-04-08 14:05 ` Mark Brown 2021-04-09 16:22 ` Mark Brown 2021-04-09 16:22 ` Mark Brown 2021-05-24 8:25 ` [PATCH] spi: imx: add 16/32 bits per word support for slave mode Tomas Melin 2021-05-24 8:25 ` Tomas Melin
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