linux-kernel - [PATCH v5 3/6] usb: host: xhci-plat: support override of hc driver

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Date:   Fri,  6 May 2022 15:31:16 +0900
From:   Daehwan Jung <dh10.jung@...sung.com>
To:     Felipe Balbi <balbi@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Alim Akhtar <alim.akhtar@...sung.com>,
        Mathias Nyman <mathias.nyman@...el.com>,
        Lukas Bulwahn <lukas.bulwahn@...il.com>,
        Tony Lindgren <tony@...mide.com>,
        Juergen Gross <jgross@...e.com>, Arnd Bergmann <arnd@...db.de>,
        Matthias Kaehlcke <mka@...omium.org>
Cc:     linux-kernel@...r.kernel.org (open list),
        linux-usb@...r.kernel.org (open list:DESIGNWARE USB3 DRD IP DRIVER),
        linux-arm-kernel@...ts.infradead.org (moderated list:ARM/SAMSUNG S3C,
        S5P AND EXYNOS ARM ARCHITECTURES),
        linux-samsung-soc@...r.kernel.org (open list:ARM/SAMSUNG S3C, S5P AND
        EXYNOS ARM ARCHITECTURES), sc.suh@...sung.com,
        taehyun.cho@...sung.com, jh0801.jung@...sung.com,
        eomji.oh@...sung.com, Daehwan Jung <dh10.jung@...sung.com>
Subject: [PATCH v5 3/6] usb: host: xhci-plat: support override of hc driver

It helps xhci-plat driver increase usability. Vendors could use functions
in xhci-plat mostly and use some overrides to do what they wants without
modifying xhci-plat driver.

Signed-off-by: Daehwan Jung <dh10.jung@...sung.com>
---
 drivers/usb/host/xhci-plat.c | 6 ++++++
 drivers/usb/host/xhci-plat.h | 1 +
 2 files changed, 7 insertions(+)

diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
index a5881ff945a6..a340e14ce9a6 100644
--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
@@ -173,6 +173,12 @@ static const struct of_device_id usb_xhci_of_match[] = {
 MODULE_DEVICE_TABLE(of, usb_xhci_of_match);
 #endif
 
+void xhci_plat_override_driver(const struct xhci_driver_overrides *xhci_vendor_overrides)
+{
+	xhci_init_driver(&xhci_plat_hc_driver, xhci_vendor_overrides);
+}
+EXPORT_SYMBOL_GPL(xhci_plat_override_driver);
+
 static struct xhci_plat_priv_overwrite xhci_plat_vendor_overwrite;
 
 int xhci_plat_register_vendor_ops(struct xhci_vendor_ops *vendor_ops)
diff --git a/drivers/usb/host/xhci-plat.h b/drivers/usb/host/xhci-plat.h
index 8c204f3234d8..455e0018d5e6 100644
--- a/drivers/usb/host/xhci-plat.h
+++ b/drivers/usb/host/xhci-plat.h
@@ -28,5 +28,6 @@ struct xhci_plat_priv_overwrite {
 };
 
 int xhci_plat_register_vendor_ops(struct xhci_vendor_ops *vendor_ops);
+void xhci_plat_override_driver(const struct xhci_driver_overrides *xhci_vendor_overrides);
 
 #endif	/* _XHCI_PLAT_H */
-- 
2.31.1