linux-kernel - Re: [PATCH v2 7/7] memory: renesas-rpc-if: Add support for RZ/G2L

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Message-ID: <YYElefbpP4pwfmUl@shikoro>
Date:   Tue, 2 Nov 2021 12:48:09 +0100
From:   Wolfram Sang <wsa+renesas@...g-engineering.com>
To:     Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Cc:     Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>,
        Rob Herring <robh+dt@...nel.org>,
        Vignesh Raghavendra <vigneshr@...com>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Richard Weinberger <richard@....at>,
        Mark Brown <broonie@...nel.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Sergei Shtylyov <sergei.shtylyov@...il.com>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-mtd@...ts.infradead.org, linux-spi@...r.kernel.org,
        linux-renesas-soc@...r.kernel.org,
        Prabhakar <prabhakar.csengg@...il.com>,
        Biju Das <biju.das.jz@...renesas.com>
Subject: Re: [PATCH v2 7/7] memory: renesas-rpc-if: Add support for RZ/G2L

Hi Prabhakar,

> +#define RPCIF_PHYADD		0x0070	/* R/W available on R-Car E3/D3/V3M and RZ/G2{E,L} */
> +#define RPCIF_PHYWR		0x0074	/* R/W available on R-Car E3/D3/V3M and RZ/G2{E,L} */

Nice detailed research, thanks! Minor nit: Keep the sorting
alphabetical: D3, E3, V3M.

> +static void rpcif_rzg2l_timing_adjust_sdr(struct rpcif *rpc)
> +{
> +	u32 data;
> +
> +	regmap_write(rpc->regmap, RPCIF_PHYWR, 0xa5390000);
> +	regmap_write(rpc->regmap, RPCIF_PHYADD, 0x80000000);
> +	regmap_write(rpc->regmap, RPCIF_PHYWR, 0x00008080);
> +	regmap_write(rpc->regmap, RPCIF_PHYADD, 0x80000022);
> +	regmap_write(rpc->regmap, RPCIF_PHYWR, 0x00008080);
> +	regmap_write(rpc->regmap, RPCIF_PHYADD, 0x80000024);
> +
> +	regmap_read(rpc->regmap, RPCIF_PHYCNT, &data);
> +	regmap_write(rpc->regmap, RPCIF_PHYCNT, data | RPCIF_PHYCNT_CKSEL(3));
> +	regmap_write(rpc->regmap, RPCIF_PHYWR, 0x00000030);
> +	regmap_write(rpc->regmap, RPCIF_PHYADD, 0x80000032);
> +}

Still magic values here. Don't you have them explained in your Gen3
documentation? It is tables 62.16 and 62.17 in my versions.

Other than these, looks good.

Thanks,

   Wolfram

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