Hello!
On 1/12/2018 8:51 AM, Benjamin Herrenschmidt wrote:
The Aspeed SoCs use uhci-platform. With the new dynamic clock
control framework, the corresponding IP block clock must be
properly enabled.
This is a simplified variant of what ehci-platform does, it
looks for *one* clock attached to the device, and if it's
there, enables it.
Signed-off-by: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
[...]
diff --git a/drivers/usb/host/uhci-platform.c b/drivers/usb/host/uhci-platform.c
index 6cb16d4b2257..7d959071f92b 100644
--- a/drivers/usb/host/uhci-platform.c
+++ b/drivers/usb/host/uhci-platform.c
@@ -119,6 +119,21 @@ static int uhci_hcd_platform_probe(struct platform_device *pdev)
"Enabled Aspeed implementation workarounds\n");
}
}
+
+ /* Get and enable clock if any specified */
+ uhci->clk = devm_clk_get(&pdev->dev, NULL);
+ if (IS_ERR(uhci->clk)) {
+ ret = PTR_ERR(uhci->clk);
+ goto err_rmr;
+ }
Indent with tabs as elsewhere, please.
+ if (uhci->clk) {
+ ret = clk_prepare_enable(uhci->clk);
+ if (ret) {
+ dev_err(&pdev->dev, "Error couldn't enable clock (%d)\n", ret);
+ goto err_rmr;
+ }
+ }
+
ret = usb_add_hcd(hcd, pdev->resource[1].start, IRQF_SHARED);
if (ret)
goto err_rmr;
[...]
MBR, Segei
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