crypto: ccree - better clock handling
Use managed clock handling, differentiate between no clock (possibly OK) and clock init failure (never OK) and correctly handle clock detection being deferred. Suggested-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com> Reviewed-by: Simon Horman <horms+renesas@verge.net.au> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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@ -190,6 +190,7 @@ static int init_cc_resources(struct platform_device *plat_dev)
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u64 dma_mask;
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u64 dma_mask;
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const struct cc_hw_data *hw_rev;
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const struct cc_hw_data *hw_rev;
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const struct of_device_id *dev_id;
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const struct of_device_id *dev_id;
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struct clk *clk;
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int rc = 0;
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int rc = 0;
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new_drvdata = devm_kzalloc(dev, sizeof(*new_drvdata), GFP_KERNEL);
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new_drvdata = devm_kzalloc(dev, sizeof(*new_drvdata), GFP_KERNEL);
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@ -219,7 +220,24 @@ static int init_cc_resources(struct platform_device *plat_dev)
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platform_set_drvdata(plat_dev, new_drvdata);
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platform_set_drvdata(plat_dev, new_drvdata);
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new_drvdata->plat_dev = plat_dev;
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new_drvdata->plat_dev = plat_dev;
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new_drvdata->clk = of_clk_get(np, 0);
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clk = devm_clk_get(dev, NULL);
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if (IS_ERR(clk))
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switch (PTR_ERR(clk)) {
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/* Clock is optional so this might be fine */
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case -ENOENT:
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break;
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/* Clock not available, let's try again soon */
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case -EPROBE_DEFER:
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return -EPROBE_DEFER;
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default:
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dev_err(dev, "Error getting clock: %ld\n",
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PTR_ERR(clk));
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return PTR_ERR(clk);
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}
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new_drvdata->clk = clk;
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new_drvdata->coherent = of_dma_is_coherent(np);
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new_drvdata->coherent = of_dma_is_coherent(np);
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/* Get device resources */
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/* Get device resources */
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