diff options
| author | Vadim Fedorenko <vadfed@meta.com> | 2023-02-14 16:59:28 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2023-02-14 21:04:59 +0300 |
| commit | 1dd46599f83ac5323a175d32955b1270e95cd11b (patch) | |
| tree | 767681de811eddf0af2758b87b75024a3e16b0ed /drivers/spi | |
| parent | e97622254420ce5f03f3f3e6ad6ecbf86da248d9 (diff) | |
| download | linux-1dd46599f83ac5323a175d32955b1270e95cd11b.tar.xz | |
spi: xilinx: add force_irq for QSPI mode
Xilinx PG158 page 80 [1] states that master transaction inhibit bit must
be set to properly setup the transaction in QSPI mode. Add the force_irq
flag to follow this sequence.
[1] https://docs.xilinx.com/r/en-US/pg153-axi-quad-spi/Dual/Quad-SPI-Mode-Transactions
Signed-off-by: Vadim Fedorenko <vadfed@meta.com>
Link: https://lore.kernel.org/r/20230214135928.1253205-1-vadfed@meta.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/spi-xilinx.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/spi/spi-xilinx.c b/drivers/spi/spi-xilinx.c index 7377d3b81302..1411548f4255 100644 --- a/drivers/spi/spi-xilinx.c +++ b/drivers/spi/spi-xilinx.c @@ -83,7 +83,7 @@ struct xilinx_spi { void __iomem *regs; /* virt. address of the control registers */ int irq; - + bool force_irq; /* force irq to setup master inhibit */ u8 *rx_ptr; /* pointer in the Tx buffer */ const u8 *tx_ptr; /* pointer in the Rx buffer */ u8 bytes_per_word; @@ -248,7 +248,8 @@ static int xilinx_spi_txrx_bufs(struct spi_device *spi, struct spi_transfer *t) xspi->rx_ptr = t->rx_buf; remaining_words = t->len / xspi->bytes_per_word; - if (xspi->irq >= 0 && remaining_words > xspi->buffer_size) { + if (xspi->irq >= 0 && + (xspi->force_irq || remaining_words > xspi->buffer_size)) { u32 isr; use_irq = true; /* Inhibit irq to avoid spurious irqs on tx_empty*/ @@ -393,6 +394,7 @@ static int xilinx_spi_probe(struct platform_device *pdev) struct resource *res; int ret, num_cs = 0, bits_per_word; struct spi_master *master; + bool force_irq = false; u32 tmp; u8 i; @@ -400,6 +402,7 @@ static int xilinx_spi_probe(struct platform_device *pdev) if (pdata) { num_cs = pdata->num_chipselect; bits_per_word = pdata->bits_per_word; + force_irq = pdata->force_irq; } else { of_property_read_u32(pdev->dev.of_node, "xlnx,num-ss-bits", &num_cs); @@ -477,6 +480,8 @@ static int xilinx_spi_probe(struct platform_device *pdev) dev_name(&pdev->dev), xspi); if (ret) return ret; + + xspi->force_irq = force_irq; } /* SPI controller initializations */ |