From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sowjanya Komatineni Subject: [PATCH V3 1/9] spi: tegra114: fix PIO transfer Date: Mon, 15 Apr 2019 14:30:26 -0700 Message-ID: <1555363834-32155-2-git-send-email-skomatineni@nvidia.com> References: <1555363834-32155-1-git-send-email-skomatineni@nvidia.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: In-Reply-To: <1555363834-32155-1-git-send-email-skomatineni@nvidia.com> Sender: linux-kernel-owner@vger.kernel.org To: thierry.reding@gmail.com, jonathanh@nvidia.com, talho@nvidia.com, skomatineni@nvidia.com, broonie@kernel.org, robh+dt@kernel.org, mark.rutland@arm.com, kyarlagadda@nvidia.com Cc: ldewangan@nvidia.com, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org, linux-spi@vger.kernel.org, devicetree@vger.kernel.org List-Id: devicetree@vger.kernel.org This patch fixes PIO mode transfer to use PIO bit in SPI_COMMAND1 register. Current driver uses DMA_EN instead of PIO bit. Signed-off-by: Sowjanya Komatineni --- drivers/spi/spi-tegra114.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/spi/spi-tegra114.c b/drivers/spi/spi-tegra114.c index b8c6393e2190..b1f31bb16659 100644 --- a/drivers/spi/spi-tegra114.c +++ b/drivers/spi/spi-tegra114.c @@ -651,8 +651,9 @@ static int tegra_spi_start_cpu_based_transfer( tspi->is_curr_dma_xfer = false; - val |= SPI_DMA_EN; - tegra_spi_writel(tspi, val, SPI_DMA_CTL); + val = tspi->command1_reg; + val |= SPI_PIO; + tegra_spi_writel(tspi, val, SPI_COMMAND1); return 0; } -- 2.7.4