From de9f2c9c2ed8ee4ffadc3909a46c17888fed619f Mon Sep 17 00:00:00 2001 From: Masahisa Kojima Date: Tue, 17 May 2022 17:41:38 +0900 Subject: [PATCH] spi: synquacer: DMSTART bit must not be set while transferring DMSTART bit must not be set while there is active transfer. This commit sets the DMSTART bit only when the transfer begins. Signed-off-by: Masahisa Kojima Signed-off-by: Satoru Okamoto Acked-by: Jassi Brar --- drivers/spi/spi-synquacer.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/spi/spi-synquacer.c b/drivers/spi/spi-synquacer.c index f1422cf..5e1b3ae 100644 --- a/drivers/spi/spi-synquacer.c +++ b/drivers/spi/spi-synquacer.c @@ -330,9 +330,11 @@ static int synquacer_spi_xfer(struct udevice *dev, unsigned int bitlen, writel(~0, priv->base + RXC); /* Trigger */ - val = readl(priv->base + DMSTART); - val |= BIT(TRIGGER); - writel(val, priv->base + DMSTART); + if (flags & SPI_XFER_BEGIN) { + val = readl(priv->base + DMSTART); + val |= BIT(TRIGGER); + writel(val, priv->base + DMSTART); + } while (busy & (BIT(RXBIT) | BIT(TXBIT))) { if (priv->rx_words) -- 2.7.4