USB: dwc3: refactor clock lookups
The probe callback has become unwieldy so break out the clock lookups into a new helper function to improve readability. Acked-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com> Signed-off-by: Johan Hovold <johan+linaro@kernel.org> Link: https://lore.kernel.org/r/20230404072524.19014-11-johan+linaro@kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -1704,6 +1704,64 @@ static struct extcon_dev *dwc3_get_extcon(struct dwc3 *dwc)
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return edev;
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}
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static int dwc3_get_clocks(struct dwc3 *dwc)
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{
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struct device *dev = dwc->dev;
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if (!dev->of_node)
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return 0;
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/*
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* Clocks are optional, but new DT platforms should support all clocks
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* as required by the DT-binding.
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* Some devices have different clock names in legacy device trees,
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* check for them to retain backwards compatibility.
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*/
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dwc->bus_clk = devm_clk_get_optional(dev, "bus_early");
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if (IS_ERR(dwc->bus_clk)) {
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return dev_err_probe(dev, PTR_ERR(dwc->bus_clk),
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"could not get bus clock\n");
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}
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if (dwc->bus_clk == NULL) {
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dwc->bus_clk = devm_clk_get_optional(dev, "bus_clk");
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if (IS_ERR(dwc->bus_clk)) {
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return dev_err_probe(dev, PTR_ERR(dwc->bus_clk),
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"could not get bus clock\n");
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}
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}
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dwc->ref_clk = devm_clk_get_optional(dev, "ref");
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if (IS_ERR(dwc->ref_clk)) {
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return dev_err_probe(dev, PTR_ERR(dwc->ref_clk),
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"could not get ref clock\n");
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}
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if (dwc->ref_clk == NULL) {
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dwc->ref_clk = devm_clk_get_optional(dev, "ref_clk");
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if (IS_ERR(dwc->ref_clk)) {
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return dev_err_probe(dev, PTR_ERR(dwc->ref_clk),
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"could not get ref clock\n");
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}
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}
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dwc->susp_clk = devm_clk_get_optional(dev, "suspend");
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if (IS_ERR(dwc->susp_clk)) {
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return dev_err_probe(dev, PTR_ERR(dwc->susp_clk),
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"could not get suspend clock\n");
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}
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if (dwc->susp_clk == NULL) {
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dwc->susp_clk = devm_clk_get_optional(dev, "suspend_clk");
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if (IS_ERR(dwc->susp_clk)) {
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return dev_err_probe(dev, PTR_ERR(dwc->susp_clk),
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"could not get suspend clock\n");
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}
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}
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return 0;
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}
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static int dwc3_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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@ -1754,61 +1812,9 @@ static int dwc3_probe(struct platform_device *pdev)
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goto err_put_psy;
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}
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if (dev->of_node) {
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/*
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* Clocks are optional, but new DT platforms should support all
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* clocks as required by the DT-binding.
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* Some devices have different clock names in legacy device trees,
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* check for them to retain backwards compatibility.
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*/
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dwc->bus_clk = devm_clk_get_optional(dev, "bus_early");
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if (IS_ERR(dwc->bus_clk)) {
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ret = dev_err_probe(dev, PTR_ERR(dwc->bus_clk),
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"could not get bus clock\n");
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goto err_put_psy;
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}
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if (dwc->bus_clk == NULL) {
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dwc->bus_clk = devm_clk_get_optional(dev, "bus_clk");
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if (IS_ERR(dwc->bus_clk)) {
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ret = dev_err_probe(dev, PTR_ERR(dwc->bus_clk),
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"could not get bus clock\n");
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goto err_put_psy;
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}
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}
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dwc->ref_clk = devm_clk_get_optional(dev, "ref");
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if (IS_ERR(dwc->ref_clk)) {
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ret = dev_err_probe(dev, PTR_ERR(dwc->ref_clk),
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"could not get ref clock\n");
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goto err_put_psy;
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}
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if (dwc->ref_clk == NULL) {
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dwc->ref_clk = devm_clk_get_optional(dev, "ref_clk");
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if (IS_ERR(dwc->ref_clk)) {
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ret = dev_err_probe(dev, PTR_ERR(dwc->ref_clk),
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"could not get ref clock\n");
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goto err_put_psy;
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}
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}
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dwc->susp_clk = devm_clk_get_optional(dev, "suspend");
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if (IS_ERR(dwc->susp_clk)) {
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ret = dev_err_probe(dev, PTR_ERR(dwc->susp_clk),
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"could not get suspend clock\n");
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goto err_put_psy;
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}
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if (dwc->susp_clk == NULL) {
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dwc->susp_clk = devm_clk_get_optional(dev, "suspend_clk");
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if (IS_ERR(dwc->susp_clk)) {
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ret = dev_err_probe(dev, PTR_ERR(dwc->susp_clk),
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"could not get suspend clock\n");
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goto err_put_psy;
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}
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}
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}
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ret = dwc3_get_clocks(dwc);
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if (ret)
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goto err_put_psy;
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ret = reset_control_deassert(dwc->reset);
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if (ret)
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