From mboxrd@z Thu Jan 1 00:00:00 1970 From: Emil Renner Berthing Subject: [PATCH v1 14/14] spi: rockchip: support lsb-first mode Date: Wed, 31 Oct 2018 11:57:11 +0100 Message-ID: <20181031105711.19575-15-esmil@mailme.dk> References: <20181031105711.19575-1-esmil@mailme.dk> Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Cc: Emil Renner Berthing , Addy Ke , Mark Brown , Heiko Stuebner , linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org To: linux-spi@vger.kernel.org Return-path: In-Reply-To: <20181031105711.19575-1-esmil@mailme.dk> Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-spi.vger.kernel.org From: Emil Renner Berthing Add missing support for lsb-first mode. Signed-off-by: Emil Renner Berthing --- drivers/spi/spi-rockchip.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/spi/spi-rockchip.c b/drivers/spi/spi-rockchip.c index 9e47e81553a1..3912526ead66 100644 --- a/drivers/spi/spi-rockchip.c +++ b/drivers/spi/spi-rockchip.c @@ -476,6 +476,8 @@ static void rockchip_spi_config(struct rockchip_spi *rs, cr0 |= rs->rsd << CR0_RSD_OFFSET; cr0 |= (spi->mode & 0x3U) << CR0_SCPH_OFFSET; + if (spi->mode & SPI_LSB_FIRST) + cr0 |= CR0_FBM_LSB << CR0_FBM_OFFSET; if (xfer->rx_buf && xfer->tx_buf) cr0 |= CR0_XFM_TR << CR0_XFM_OFFSET; @@ -681,7 +683,7 @@ static int rockchip_spi_probe(struct platform_device *pdev) master->auto_runtime_pm = true; master->bus_num = pdev->id; - master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_LOOP; + master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_LOOP | SPI_LSB_FIRST; master->num_chipselect = ROCKCHIP_SPI_MAX_CS_NUM; master->dev.of_node = pdev->dev.of_node; master->bits_per_word_mask = SPI_BPW_MASK(16) | SPI_BPW_MASK(8) | SPI_BPW_MASK(4); -- 2.19.1