[PATCH] mmc: sdhci-xenon: Fix clock resource by adding an optional bus clock

Hello,

On Fri, 29 Sep 2017 11:13:00 +0200, Gregory CLEMENT wrote:

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 - clock-names:
   Array of names corresponding to clocks property.
   The input clock for Xenon IP core should be named as "core".
+  The input clock for the AXI bus must be named as "axi".  

Is "bus" more suitable?  

I find bus too vague.

Actually no, I believe "bus" is more common. Indeed, you could have the
same IP, attached to a different interconnect I guess.

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 	/*
 	 * Link Xenon specific mmc_host_ops function,

@@ -491,9 +493,20 @@ static int xenon_probe(struct platform_device *pdev)
 	if (err)
 		goto free_pltfm;
 
+	priv->axi_clk = devm_clk_get(&pdev->dev, "axi");
+	if (IS_ERR(priv->axi_clk)) {

-EPROBE_DEFER handling ?

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+		err = PTR_ERR(priv->axi_clk);
+		dev_err(&pdev->dev, "Failed to setup axi clk: %d\n", err);  

Since the bus clock is optional, can we remove this err msg?  

I will change it in dev_info.

This clock is optional (in order to keep DT backward compatibility), so
there shouldn't be any error message, be it dev_err() or dev_info().

Best regards,

Thomas
-- 
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com