linux-kernel - Re: [v6, 5/5] mmc: sdhci-of-esdhc: fix host version for T4240-R1.0-R2.0

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Date:	Sun, 13 Mar 2016 23:26:28 +0100
From:	Arnd Bergmann <arnd@...db.de>
To:	linuxppc-dev@...ts.ozlabs.org
Cc:	Yangbo Lu <yangbo.lu@....com>, devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	linux-clk@...r.kernel.org, linux-i2c@...r.kernel.org,
	iommu@...ts.linux-foundation.org, netdev@...r.kernel.org,
	linux-mmc@...r.kernel.org, ulf.hansson@...aro.org,
	Zhao Qiang <qiang.zhao@...escale.com>,
	Russell King <linux@....linux.org.uk>,
	Bhupesh Sharma <bhupesh.sharma@...escale.com>,
	Joerg Roedel <joro@...tes.org>,
	Santosh Shilimkar <ssantosh@...nel.org>, scott.wood@....com,
	Rob Herring <robh+dt@...nel.org>,
	Claudiu Manoil <claudiu.manoil@...escale.com>,
	Kumar Gala <galak@...eaurora.org>, leoyang.li@....com,
	xiaobo.xie@....com
Subject: Re: [v6, 5/5] mmc: sdhci-of-esdhc: fix host version for T4240-R1.0-R2.0

On Wednesday 09 March 2016 18:08:51 Yangbo Lu wrote:
> @@ -567,10 +580,20 @@ static void esdhc_init(struct platform_device *pdev, struct sdhci_host *host)
>         struct sdhci_pltfm_host *pltfm_host;
>         struct sdhci_esdhc *esdhc;
>         u16 host_ver;
> +       u32 svr;
>  
>         pltfm_host = sdhci_priv(host);
>         esdhc = sdhci_pltfm_priv(pltfm_host);
>  
> +       fsl_guts_init();
> +       svr = fsl_guts_get_svr();
> +       if (svr) {
> +               esdhc->soc_ver = SVR_SOC_VER(svr);
> +               esdhc->soc_rev = SVR_REV(svr);
> +       } else {
> +               dev_err(&pdev->dev, "Failed to get SVR value!\n");
> +       }
> +

This makes the driver non-portable. Better identify the specific workarounds
based on the compatible string for this device, or add a boolean DT property
for the quirk.

	Arnd