diff options
| author | Venkatesh Yadav Abbarapu | 2022-11-25 16:14:13 +0530 |
|---|---|---|
| committer | Michal Simek | 2022-12-05 08:55:54 +0100 |
| commit | 906e20a613abdcba5f558ac8e93cb6fad464f786 (patch) | |
| tree | 56a3ddc43a5390e38e24b528c7a3db1f93659980 | |
| parent | 31e66aea373cfa98f151a44be7b4cd7b13f98b41 (diff) | |
spi: zynqmp_qspi: Add support for 64-bit read/write
When we pass the 64-bit address to read/write, only lower 32-bit
address is getting updated. Program the upper 32-bit address in the
DMA destination memory address MSBs register, which can handle upto
44-bit destination address.
Signed-off-by: Venkatesh Yadav Abbarapu <venkatesh.abbarapu@amd.com>
Link: https://lore.kernel.org/r/20221125104413.26140-1-venkatesh.abbarapu@amd.com
Signed-off-by: Michal Simek <michal.simek@amd.com>
| -rw-r--r-- | drivers/spi/zynqmp_gqspi.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/spi/zynqmp_gqspi.c b/drivers/spi/zynqmp_gqspi.c index 83a5c8aebfc..335b458cb90 100644 --- a/drivers/spi/zynqmp_gqspi.c +++ b/drivers/spi/zynqmp_gqspi.c @@ -662,7 +662,7 @@ static int zynqmp_qspi_start_io(struct zynqmp_qspi_priv *priv, static int zynqmp_qspi_start_dma(struct zynqmp_qspi_priv *priv, u32 gen_fifo_cmd, u32 *buf) { - u32 addr; + unsigned long addr; u32 size; u32 actuallen = priv->len; u32 totallen = priv->len; @@ -678,7 +678,9 @@ static int zynqmp_qspi_start_dma(struct zynqmp_qspi_priv *priv, totallen -= priv->len; /* Save remaining bytes length to read */ actuallen = priv->len; /* Actual number of bytes reading */ - writel((unsigned long)buf, &dma_regs->dmadst); + writel(lower_32_bits((unsigned long)buf), &dma_regs->dmadst); + writel(upper_32_bits((unsigned long)buf) & GENMASK(11, 0), + &dma_regs->dmadstmsb); writel(roundup(priv->len, GQSPI_DMA_ALIGN), &dma_regs->dmasize); writel(GQSPI_DMA_DST_I_STS_MASK, &dma_regs->dmaier); addr = (unsigned long)buf; |