From: Tomer Maimon Date: Wed, 15 Jan 2020 16:22:58 +0000 (+0200) Subject: spi: npcm-pspi: fix 16 bit send and receive support X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=47416a5f27be0a0e815ef5f9f2f06618ae5e0470;p=linux.git spi: npcm-pspi: fix 16 bit send and receive support Fixing NPCM BMC Peripheral SPI controller 16 bit send and receive support by writing and reading the SPI data in the right order. Signed-off-by: Tomer Maimon Link: https://lore.kernel.org/r/20200115162301.235926-2-tmaimon77@gmail.com Signed-off-by: Mark Brown --- diff --git a/drivers/spi/spi-npcm-pspi.c b/drivers/spi/spi-npcm-pspi.c index fe624731c74ce..c74611abe2a92 100644 --- a/drivers/spi/spi-npcm-pspi.c +++ b/drivers/spi/spi-npcm-pspi.c @@ -195,6 +195,7 @@ static void npcm_pspi_setup_transfer(struct spi_device *spi, static void npcm_pspi_send(struct npcm_pspi *priv) { int wsize; + u16 val; wsize = min(bytes_per_word(priv->bits_per_word), priv->tx_bytes); priv->tx_bytes -= wsize; @@ -204,17 +205,18 @@ static void npcm_pspi_send(struct npcm_pspi *priv) switch (wsize) { case 1: - iowrite8(*priv->tx_buf, NPCM_PSPI_DATA + priv->base); + val = *priv->tx_buf++; + iowrite8(val, NPCM_PSPI_DATA + priv->base); break; case 2: - iowrite16(*priv->tx_buf, NPCM_PSPI_DATA + priv->base); + val = *priv->tx_buf++; + val = *priv->tx_buf++ | (val << 8); + iowrite16(val, NPCM_PSPI_DATA + priv->base); break; default: WARN_ON_ONCE(1); return; } - - priv->tx_buf += wsize; } static void npcm_pspi_recv(struct npcm_pspi *priv) @@ -230,18 +232,17 @@ static void npcm_pspi_recv(struct npcm_pspi *priv) switch (rsize) { case 1: - val = ioread8(priv->base + NPCM_PSPI_DATA); + *priv->rx_buf++ = ioread8(priv->base + NPCM_PSPI_DATA); break; case 2: val = ioread16(priv->base + NPCM_PSPI_DATA); + *priv->rx_buf++ = (val >> 8); + *priv->rx_buf++ = val & 0xff; break; default: WARN_ON_ONCE(1); return; } - - *priv->rx_buf = val; - priv->rx_buf += rsize; } static int npcm_pspi_transfer_one(struct spi_master *master,