sata: ahci-da850: get the sata clock using a connection id
In preparation for using two clocks in the driver (the sysclk2-based clock and the external REFCLK), check if we got the functional clock after calling ahci_platform_get_resources(). If not, retry calling clk_get() with con_id specified. Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com> Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Sekhar Nori <nsekhar@ti.com>
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@ -71,12 +71,28 @@ static int ahci_da850_probe(struct platform_device *pdev)
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struct ahci_host_priv *hpriv;
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struct resource *res;
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void __iomem *pwrdn_reg;
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struct clk *clk;
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int rc;
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hpriv = ahci_platform_get_resources(pdev);
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if (IS_ERR(hpriv))
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return PTR_ERR(hpriv);
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/*
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* Internally ahci_platform_get_resources() calls clk_get(dev, NULL)
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* when trying to obtain the functional clock. This SATA controller
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* uses two clocks for which we specify two connection ids. If we don't
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* have the functional clock at this point - call clk_get() again with
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* con_id = "fck".
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*/
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if (!hpriv->clks[0]) {
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clk = clk_get(dev, "fck");
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if (IS_ERR(clk))
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return PTR_ERR(clk);
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hpriv->clks[0] = clk;
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}
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rc = ahci_platform_enable_resources(hpriv);
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if (rc)
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return rc;
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