Re: [PATCH 2/2] remoteproc: mediatek: Support mt8186 scp

[AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>]

Il 03/01/22 08:58, allen-kh.cheng ha scritto:
> Add SCP support for mt8186
> 
> Signed-off-by: Allen-KH Cheng <allen-kh.cheng@mediatek.com>

Hello! Thanks for the patch!
However, there's something to improve...

> ---
>   drivers/remoteproc/mtk_scp.c | 39 ++++++++++++++++++++++++++++++++++++
>   1 file changed, 39 insertions(+)
> 
> diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c
> index 36e48cf58ed6..38eab6b86fd7 100644
> --- a/drivers/remoteproc/mtk_scp.c
> +++ b/drivers/remoteproc/mtk_scp.c
> @@ -365,6 +365,31 @@ static int mt8183_scp_before_load(struct mtk_scp *scp)
>   	return 0;
>   }
>   
> +static int mt8186_scp_before_load(struct mtk_scp *scp)
> +{
> +	int i;
> +
> +	/* Clear SCP to host interrupt */
> +	writel(MT8183_SCP_IPC_INT_BIT, scp->reg_base + MT8183_SCP_TO_HOST);
> +
> +	/* Reset clocks before loading FW */
> +	writel(0x0, scp->reg_base + MT8183_SCP_CLK_SW_SEL);
> +	writel(0x0, scp->reg_base + MT8183_SCP_CLK_DIV_SEL);
> +

.............

> +	/* Turn on the power of SCP's SRAM before using it. Enable 1 block per time*/
> +	for (i = 31; i >= 0; i--)
> +		writel(GENMASK(i, 0), scp->reg_base + MT8183_SCP_SRAM_PDN);
> +	writel(0, scp->reg_base + MT8183_SCP_SRAM_PDN);
> +

.............

This snippet corresponds exactly to the mt8192_power_on_sram() helper:
please avoid code duplication by simply calling that function instead.

Thanks,
- Angelo