diff options
| author | Bjorn Andersson <bjorn.andersson@oss.qualcomm.com> | 2025-04-14 20:21:53 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-04-15 14:29:19 +0200 |
| commit | 170940f7e6859152d8579e7be57c6a2060438651 (patch) | |
| tree | 177e1028d87635bcdf64399a422b53ae44811052 /drivers/usb/dwc3/core.c | |
| parent | 613a2e655d4dc9cd64c846b36543a5ef4e8de004 (diff) | |
usb: dwc3: core: Don't touch resets and clocks
When the core is integrated with glue, it's reasonable to assume that
the glue driver will have to touch the IP before/after the core takes
the hardware out and into reset. As such the glue must own these
resources and be allowed to turn them on/off outside the core's
handling.
Allow the platform or glue layer to indicate if the core logic for
clocks and resets should be skipped to deal with this.
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Acked-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Tested-by: Neil Armstrong <neil.armstrong@linaro.org> # on SM8650-QRD
Signed-off-by: Bjorn Andersson <bjorn.andersson@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20250414-dwc3-refactor-v7-4-f015b358722d@oss.qualcomm.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/dwc3/core.c')
| -rw-r--r-- | drivers/usb/dwc3/core.c | 20 |
1 files changed, 11 insertions, 9 deletions
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index 81324d586c07..2bc775a747f2 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -2211,15 +2211,17 @@ int dwc3_core_probe(const struct dwc3_probe_data *data) if (IS_ERR(dwc->usb_psy)) return dev_err_probe(dev, PTR_ERR(dwc->usb_psy), "couldn't get usb power supply\n"); - dwc->reset = devm_reset_control_array_get_optional_shared(dev); - if (IS_ERR(dwc->reset)) { - ret = PTR_ERR(dwc->reset); - goto err_put_psy; - } + if (!data->ignore_clocks_and_resets) { + dwc->reset = devm_reset_control_array_get_optional_shared(dev); + if (IS_ERR(dwc->reset)) { + ret = PTR_ERR(dwc->reset); + goto err_put_psy; + } - ret = dwc3_get_clocks(dwc); - if (ret) - goto err_put_psy; + ret = dwc3_get_clocks(dwc); + if (ret) + goto err_put_psy; + } ret = reset_control_deassert(dwc->reset); if (ret) @@ -2334,7 +2336,7 @@ EXPORT_SYMBOL_GPL(dwc3_core_probe); static int dwc3_probe(struct platform_device *pdev) { - struct dwc3_probe_data probe_data; + struct dwc3_probe_data probe_data = {}; struct resource *res; struct dwc3 *dwc; |