On Wed, Dec 04, 2013 at 10:52:55PM +0000, dinguyen@xxxxxxxxxx wrote:
> From: Dinh Nguyen <dinguyen@xxxxxxxxxx>
>
> The SDR timing registers for the SD/MMC IP block for SOCFPGA is located
> in the system manager. This system manager IP block is located outside of
> the SD IP block itself. We can use the normal clock API to set the SDR
> settings.
>
> Also, there is no need for "altr,dw-mshc-ciu-div" as the driver can get
> the value of the CIU clock from the common clock API.
If this property isn't necessary, please mark it as deprecated in the
documentation.
[...]
> + if (IS_ERR(sysmgr_clk))
> + dev_err(host->dev, "sysmgr-sdr-mmc not available\n");
> + else {
> + clk_disable_unprepare(host->ciu_clk);
> + clk_prepare_enable(sysmgr_clk);
> + clk_prepare_enable(host->ciu_clk);
> + }
> return 0;
> }
This looks a little odd. Should you not return an error if you don't
have the requisite clocks?
[...]
> - priv->sysreg = syscon_regmap_lookup_by_compatible("altr,sys-mgr");
> - if (IS_ERR(priv->sysreg)) {
> - dev_err(host->dev, "regmap for altr,sys-mgr lookup failed.\n");
> - return PTR_ERR(priv->sysreg);
> - }
Is this property deprecated?
> -
> - ret = of_property_read_u32(np, "altr,dw-mshc-ciu-div", &div);
> - if (ret)
> - dev_info(host->dev, "No dw-mshc-ciu-div specified, assuming 1");
> - priv->ciu_div = div;
> -
> - ret = of_property_read_u32_array(np,
> - "altr,dw-mshc-sdr-timing", timing, 2);
Deprecated too?
Thanks,
Mark.
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