linux-kernel - [PATCH 05/12] usb: dwc3: Override end of dwc3 memory resource

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Message-ID: <20231016-dwc3-refactor-v1-5-ab4a84165470@quicinc.com>
Date:   Mon, 16 Oct 2023 20:11:13 -0700
From:   Bjorn Andersson <quic_bjorande@...cinc.com>
To:     Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Wesley Cheng <quic_wcheng@...cinc.com>,
        Thinh Nguyen <Thinh.Nguyen@...opsys.com>,
        Felipe Balbi <balbi@...nel.org>,
        Philipp Zabel <p.zabel@...gutronix.de>
CC:     <linux-arm-msm@...r.kernel.org>, <linux-usb@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Johan Hovold <johan@...nel.org>,
        Krishna Kurapati PSSNV <quic_kriskura@...cinc.com>,
        "Bjorn Andersson" <quic_bjorande@...cinc.com>
Subject: [PATCH 05/12] usb: dwc3: Override end of dwc3 memory resource

In the case that the dwc3 core driver is instantiated from the same
memory resource information as the glue driver, the dwc_res memory
region will overlap with the memory region already mapped by the glue.

As the DWC3 core driver already does math on the passed memory region to
exclude the XHCI region, also adjust the end address, to avoid having to
pass an adjusted region from the glue explicitly.

Signed-off-by: Bjorn Andersson <quic_bjorande@...cinc.com>
---
 drivers/usb/dwc3/core.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index 71e376bebb16..5d86b803fab0 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -1908,6 +1908,7 @@ struct dwc3 *dwc3_probe(struct platform_device *pdev)
 	 */
 	dwc_res = *res;
 	dwc_res.start += DWC3_GLOBALS_REGS_START;
+	dwc_res.end = res->start + DWC3_OTG_REGS_END;
 
 	if (dev->of_node) {
 		struct device_node *parent = of_get_parent(dev->of_node);
@@ -1915,6 +1916,7 @@ struct dwc3 *dwc3_probe(struct platform_device *pdev)
 		if (of_device_is_compatible(parent, "realtek,rtd-dwc3")) {
 			dwc_res.start -= DWC3_GLOBALS_REGS_START;
 			dwc_res.start += DWC3_RTK_RTD_GLOBALS_REGS_START;
+			dwc_res.end = dwc_res.start + DWC3_OTG_REGS_END;
 		}
 
 		of_node_put(parent);

-- 
2.25.1