linux-kernel - [PATCH V3 4/6] usb: ohci-platform: Add support for Broadcom STB SoC's

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Date:   Mon,  5 Nov 2018 16:31:31 -0500
From:   Al Cooper <alcooperx@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     Al Cooper <alcooperx@...il.com>,
        Alan Stern <stern@...land.harvard.edu>,
        Alban Bedel <albeu@...e.fr>, Alex Elder <elder@...aro.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Arnd Bergmann <arnd@...db.de>,
        Avi Fishman <avifishman70@...il.com>,
        bcm-kernel-feedback-list@...adcom.com,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Chunfeng Yun <chunfeng.yun@...iatek.com>,
        "David S. Miller" <davem@...emloft.net>,
        devicetree@...r.kernel.org, Dmitry Osipenko <digetx@...il.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Gustavo A. R. Silva" <gustavo@...eddedor.com>,
        Hans de Goede <hdegoede@...hat.com>,
        James Hogan <jhogan@...nel.org>,
        Jianguo Sun <sunjianguo1@...wei.com>,
        Johan Hovold <johan@...nel.org>,
        Kees Cook <keescook@...omium.org>, linux-usb@...r.kernel.org,
        Lu Baolu <baolu.lu@...ux.intel.com>,
        Mark Rutland <mark.rutland@....com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        Mathias Nyman <mathias.nyman@...el.com>,
        Mathias Nyman <mathias.nyman@...ux.intel.com>,
        Mauro Carvalho Chehab <mchehab+samsung@...nel.org>,
        Rishabh Bhatnagar <rishabhb@...eaurora.org>,
        Rob Herring <robh+dt@...nel.org>, Roger Quadros <rogerq@...com>
Subject: [PATCH V3 4/6] usb: ohci-platform: Add support for Broadcom STB SoC's

Add support for Broadcom STB SoC's to the ohci platform driver.

Signed-off-by: Al Cooper <alcooperx@...il.com>
---
 drivers/usb/host/ohci-platform.c | 34 ++++++++++++++++++++++++++++------
 include/linux/usb/ohci_pdriver.h |  1 +
 2 files changed, 29 insertions(+), 6 deletions(-)

diff --git a/drivers/usb/host/ohci-platform.c b/drivers/usb/host/ohci-platform.c
index 65a1c3fdc88c..f425168238e6 100644
--- a/drivers/usb/host/ohci-platform.c
+++ b/drivers/usb/host/ohci-platform.c
@@ -22,6 +22,7 @@
 #include <linux/module.h>
 #include <linux/err.h>
 #include <linux/of.h>
+#include <linux/of_device.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/reset.h>
@@ -99,12 +100,23 @@ static int ohci_platform_probe(struct platform_device *dev)
 	if (usb_disabled())
 		return -ENODEV;
 
-	/*
-	 * Use reasonable defaults so platforms don't have to provide these
-	 * with DT probing on ARM.
-	 */
-	if (!pdata)
-		pdata = &ohci_platform_defaults;
+	if (!pdata) {
+		const struct usb_ohci_pdata *match_pdata;
+
+		match_pdata = of_device_get_match_data(&dev->dev);
+		if (match_pdata) {
+			pdata = devm_kmemdup(&dev->dev, match_pdata,
+					     sizeof(*pdata), GFP_KERNEL);
+			if (!pdata)
+				return -ENOMEM;
+		} else {
+			/*
+			 * Use reasonable defaults so platforms don't have
+			 * to provide these with DT probing on ARM.
+			 */
+			pdata = &ohci_platform_defaults;
+		}
+	}
 
 	err = dma_coerce_mask_and_coherent(&dev->dev, DMA_BIT_MASK(32));
 	if (err)
@@ -177,6 +189,8 @@ static int ohci_platform_probe(struct platform_device *dev)
 		ohci->flags |= OHCI_QUIRK_FRAME_NO;
 	if (pdata->num_ports)
 		ohci->num_ports = pdata->num_ports;
+	if (pdata->suspend_without_phy_exit)
+		hcd->suspend_without_phy_exit = 1;
 
 #ifndef CONFIG_USB_OHCI_BIG_ENDIAN_MMIO
 	if (ohci->flags & OHCI_QUIRK_BE_MMIO) {
@@ -305,10 +319,18 @@ static int ohci_platform_resume(struct device *dev)
 }
 #endif /* CONFIG_PM_SLEEP */
 
+static const struct usb_ohci_pdata ohci_plat_brcm_bcm7445_ohci = {
+	.power_on =		ohci_platform_power_on,
+	.power_suspend =	ohci_platform_power_off,
+	.power_off =		ohci_platform_power_off,
+	.suspend_without_phy_exit = 1,
+};
+
 static const struct of_device_id ohci_platform_ids[] = {
 	{ .compatible = "generic-ohci", },
 	{ .compatible = "cavium,octeon-6335-ohci", },
 	{ .compatible = "ti,ohci-omap3", },
+	{ .compatible = "brcm,bcm7445-ohci", &ohci_plat_brcm_bcm7445_ohci},
 	{ }
 };
 MODULE_DEVICE_TABLE(of, ohci_platform_ids);
diff --git a/include/linux/usb/ohci_pdriver.h b/include/linux/usb/ohci_pdriver.h
index 7eb16cf587ee..16b24ea1e3bb 100644
--- a/include/linux/usb/ohci_pdriver.h
+++ b/include/linux/usb/ohci_pdriver.h
@@ -35,6 +35,7 @@ struct usb_ohci_pdata {
 	unsigned	big_endian_desc:1;
 	unsigned	big_endian_mmio:1;
 	unsigned	no_big_frame_no:1;
+	unsigned	suspend_without_phy_exit:1;
 	unsigned int	num_ports;
 
 	/* Turn on all power and clocks */
-- 
1.9.0.138.g2de3478