linux-kernel - Re: [PATCH v2 5/8] mmc: sdhci-st: Add sdhci_st_set_uhs

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Message-ID: <20150330104639.GC21893@griffinp-ThinkPad-X1-Carbon-2nd>
Date:	Mon, 30 Mar 2015 11:46:39 +0100
From:	Peter Griffin <peter.griffin@...aro.org>
To:	Maxime Coquelin <maxime.coquelin@...com>
Cc:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	patrice.chotard@...com, srinivas.kandagatla@...il.com,
	chris@...ntf.net, ulf.hansson@...aro.org, lee.jones@...aro.org,
	devicetree@...r.kernel.org, linux-mmc@...r.kernel.org,
	peppe.cavallaro@...com
Subject: Re: [PATCH v2 5/8] mmc: sdhci-st: Add sdhci_st_set_uhs_signaling
 function.

Hi Maxime,

On Tue, 03 Mar 2015, Maxime Coquelin wrote:
> 
> On 02/26/2015 02:10 PM, Peter Griffin wrote:
> >To allow UHS modes to work properly we need to provide the st specific
> >set_uhs_signaling callback function. This function differs from the
> >generic sdhci_set_uhs_signaling callback in that we need to configure
> >the correct delay depending on the UHS mode, and also set the V18_EN
> >bit.
<snip>
> >+	if (ret)
> >+		dev_warn(mmc_dev(host->mmc), "Error setting dll for clock\n");
> Maybe you could  print the uhs value to know which mode it was
> trying to set?

Yes good idea, I have made that change in v3.
> >+
> >+	dev_dbg(mmc_dev(host->mmc), "uhs %d, ctrl_2 %04X\n", uhs, ctrl_2);
> >+
> >+	sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2);
> >+}
> >  static u32 sdhci_st_readl(struct sdhci_host *host, int reg)
> >  {
> >@@ -283,6 +332,7 @@ static const struct sdhci_ops sdhci_st_ops = {
> >  	.set_bus_width = sdhci_set_bus_width,
> >  	.read_l = sdhci_st_readl,
> >  	.reset = sdhci_reset,
> >+	.set_uhs_signaling = sdhci_st_set_uhs_signaling,
> >  };
> >  static const struct sdhci_pltfm_data sdhci_st_pdata = {
> 
> Other than that, you can add my:
> Acked-by: Maxime Coquelin <maxime.coquelin@...com>

Thanks, regards,

Peter.
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