Re: [PATCH v3 9/9] mtd: fsl-quadspi: add multi flash chip R/W on ls2080a

[Han Xu]

On Thu, Aug 18, 2016 at 2:38 AM, Yunhui Cui <B56489@xxxxxxxxxxxxx> wrote:
> From: Yunhui Cui <yunhui.cui@xxxxxxx>
>
> There is a hardware feature that qspi_amba_base is added
> internally by SOC design on ls2080a. so memmap_phy need not
> be added in driver. If memmap_phy is added, the flash A1
> addr space is [0, memmap_phy] which far more than flash size.
> The AMBA memory will be divided into four parts and assign to
> every chipselect. Every channel will has two valid chipselects.
>
> Signed-off-by: Yunhui Cui <yunhui.cui@xxxxxxx>
> ---
>  drivers/mtd/spi-nor/fsl-quadspi.c | 14 ++++++++++----
>  1 file changed, 10 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/mtd/spi-nor/fsl-quadspi.c b/drivers/mtd/spi-nor/fsl-quadspi.c
> index 193e81b..8c9746c 100644
> --- a/drivers/mtd/spi-nor/fsl-quadspi.c
> +++ b/drivers/mtd/spi-nor/fsl-quadspi.c
> @@ -736,11 +736,17 @@ static void fsl_qspi_set_map_addr(struct fsl_qspi *q)
>  {
>         int nor_size = q->nor_size;
>         void __iomem *base = q->iobase;
> +       u32 mem_base;
>
> -       qspi_writel(q, nor_size + q->memmap_phy, base + QUADSPI_SFA1AD);
> -       qspi_writel(q, nor_size * 2 + q->memmap_phy, base + QUADSPI_SFA2AD);
> -       qspi_writel(q, nor_size * 3 + q->memmap_phy, base + QUADSPI_SFB1AD);
> -       qspi_writel(q, nor_size * 4 + q->memmap_phy, base + QUADSPI_SFB2AD);
> +       if (has_added_amba_base_internal(q))
> +               mem_base = 0x0;
> +       else
> +               mem_base = q->memmap_phy;
> +
> +       qspi_writel(q, nor_size + mem_base, base + QUADSPI_SFA1AD);
> +       qspi_writel(q, nor_size * 2 + mem_base, base + QUADSPI_SFA2AD);
> +       qspi_writel(q, nor_size * 3 + mem_base, base + QUADSPI_SFB1AD);
> +       qspi_writel(q, nor_size * 4 + mem_base, base + QUADSPI_SFB2AD);
>  }
>
>  /*
> --
> 2.1.0.27.g96db324
>
>
Acked-by: Han xu <han.xu@xxxxxxx>
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-- 
Sincerely,

Han XU