[PATCH] spi: zynqmp_qspi: Add support for 64-bit read/write

[Michal Simek]

pá 25. 11. 2022 v 15:00 odesílatel Venkatesh Yadav Abbarapu
<venkatesh.abbarapu at amd.com> napsal:
>
> 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 at amd.com>
> ---
>
>  drivers/spi/zynqmp_gqspi.c | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/spi/zynqmp_gqspi.c b/drivers/spi/zynqmp_gqspi.c
> index 48eff777df..10f6b85cd3 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;
> --
> 2.17.1
>

Applied.
M

-- 
Michal Simek, Ing. (M.Eng), OpenPGP -> KeyID: FE3D1F91
w: www.monstr.eu p: +42-0-721842854
Maintainer of Linux kernel - Xilinx Microblaze
Maintainer of Linux kernel - Xilinx Zynq ARM and ZynqMP ARM64 SoCs
U-Boot custodian - Xilinx Microblaze/Zynq/ZynqMP/Versal SoCs