linux-kernel - Re: [PATCH v2 2/2] memory: mtk-smi: Add support for MT6795 Helio X10

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Date:   Tue, 17 May 2022 14:37:36 +0800
From:   Yong Wu <yong.wu@...iatek.com>
To:     AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Krzysztof Kozlowski <krzk@...nel.org>
CC:     <krzysztof.kozlowski@...aro.org>, <robh+dt@...nel.org>,
        <matthias.bgg@...il.com>, <linux-mediatek@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <konrad.dybcio@...ainline.org>, <marijn.suijten@...ainline.org>,
        <martin.botka@...ainline.org>,
        <~postmarketos/upstreaming@...ts.sr.ht>,
        <phone-devel@...r.kernel.org>, <paul.bouchara@...ainline.org>,
        <kernel@...labora.com>, <yi.kuo@...iatek.com>,
        <anthony.huang@...iatek.com>, <wendy-st.lin@...iatek.com>
Subject: Re: [PATCH v2 2/2] memory: mtk-smi: Add support for MT6795 Helio X10

On Fri, 2022-05-13 at 17:06 +0200, AngeloGioacchino Del Regno wrote:
> The MediaTek Helio X10 (MT6795) SoC has 5 LARBs and one common SMI
> instance without any sub-common and without GALS.
> 
> While the smi-common configuration is specific to this SoC, on the
> LARB side, this is similar to MT8173, in the sense that it doesn't
> need the port in LARB, and the register layout is also compatible
> with that one, which makes us able to fully reuse the smi-larb
> platform data struct that was introduced for MT8173.
> 
> Signed-off-by: AngeloGioacchino Del Regno <
> angelogioacchino.delregno@...labora.com>
> ---
>  drivers/memory/mtk-smi.c | 17 +++++++++++++++++
>  1 file changed, 17 insertions(+)
> 
> diff --git a/drivers/memory/mtk-smi.c b/drivers/memory/mtk-smi.c
> index 86a3d34f418e..7e7c3ede19e4 100644
> --- a/drivers/memory/mtk-smi.c
> +++ b/drivers/memory/mtk-smi.c
> @@ -21,11 +21,13 @@
>  /* SMI COMMON */
>  #define SMI_L1LEN			0x100
>  
> +#define SMI_L1_ARB			0x200
>  #define SMI_BUS_SEL			0x220
>  #define SMI_BUS_LARB_SHIFT(larbid)	((larbid) << 1)
>  /* All are MMU0 defaultly. Only specialize mmu1 here. */
>  #define F_MMU1_LARB(larbid)		(0x1 <<
> SMI_BUS_LARB_SHIFT(larbid))
>  
> +#define SMI_FIFO_TH0			0x230

Does the name come from the coda you got?
It is called SMI_READ_FIFO_TH in my coda.

>  #define SMI_M4U_TH			0x234
>  #define SMI_FIFO_TH1			0x238
>  #define SMI_FIFO_TH2			0x23c
> @@ -360,6 +362,7 @@ static const struct of_device_id
> mtk_smi_larb_of_ids[] = {
>  	{.compatible = "mediatek,mt2701-smi-larb", .data =
> &mtk_smi_larb_mt2701},
>  	{.compatible = "mediatek,mt2712-smi-larb", .data =
> &mtk_smi_larb_mt2712},
>  	{.compatible = "mediatek,mt6779-smi-larb", .data =
> &mtk_smi_larb_mt6779},
> +	{.compatible = "mediatek,mt6795-smi-larb", .data =
> &mtk_smi_larb_mt8173},
>  	{.compatible = "mediatek,mt8167-smi-larb", .data =
> &mtk_smi_larb_mt8167},
>  	{.compatible = "mediatek,mt8173-smi-larb", .data =
> &mtk_smi_larb_mt8173},
>  	{.compatible = "mediatek,mt8183-smi-larb", .data =
> &mtk_smi_larb_mt8183},
> @@ -541,6 +544,13 @@ static struct platform_driver
> mtk_smi_larb_driver = {
>  	}
>  };
>  
> +static const struct mtk_smi_reg_pair
> mtk_smi_common_mt6795_init[SMI_COMMON_INIT_REGS_NR] = {
> +	{SMI_L1_ARB, 0x1b},
> +	{SMI_M4U_TH, 0xce810c85},
> +	{SMI_FIFO_TH1, 0x43214c8},
> +	{SMI_FIFO_TH0, 0x191f},
> +};
> +
>  static const struct mtk_smi_reg_pair
> mtk_smi_common_mt8195_init[SMI_COMMON_INIT_REGS_NR] = {
>  	{SMI_L1LEN, 0xb},
>  	{SMI_M4U_TH, 0xe100e10},
> @@ -565,6 +575,12 @@ static const struct mtk_smi_common_plat
> mtk_smi_common_mt6779 = {
>  		    F_MMU1_LARB(5) | F_MMU1_LARB(6) | F_MMU1_LARB(7),
>  };
>  
> +static const struct mtk_smi_common_plat mtk_smi_common_mt6795 = {
> +	.type	  = MTK_SMI_GEN2,
> +	.bus_sel  = BIT(0),

Like the other larbs, use F_MMU1_LARB(0) here?


After the two changes,

Reviewed-by: Yong Wu <yong.wu@...iatek.com>

Thanks.

> +	.init     = mtk_smi_common_mt6795_init,
> +};
> +
>  static const struct mtk_smi_common_plat mtk_smi_common_mt8183 = {
>  	.type     = MTK_SMI_GEN2,
>  	.has_gals = true,
> @@ -609,6 +625,7 @@ static const struct of_device_id
> mtk_smi_common_of_ids[] = {
>  	{.compatible = "mediatek,mt2701-smi-common", .data =
> &mtk_smi_common_gen1},
>  	{.compatible = "mediatek,mt2712-smi-common", .data =
> &mtk_smi_common_gen2},
>  	{.compatible = "mediatek,mt6779-smi-common", .data =
> &mtk_smi_common_mt6779},
> +	{.compatible = "mediatek,mt6795-smi-common", .data =
> &mtk_smi_common_mt6795},
>  	{.compatible = "mediatek,mt8167-smi-common", .data =
> &mtk_smi_common_gen2},
>  	{.compatible = "mediatek,mt8173-smi-common", .data =
> &mtk_smi_common_gen2},
>  	{.compatible = "mediatek,mt8183-smi-common", .data =
> &mtk_smi_common_mt8183},