Merge https://gitlab.denx.de/u-boot/custodians/u-boot-usb

- DWC and i.MX6 fixes

arch/sandbox/dts/test.dts

@@ -400,6 +400,18 @@
 		sandbox,silent;	/* Don't emit sounds while testing */
 	};
 
+	nop-test_0 {
+		compatible = "sandbox,nop_sandbox1";
+		nop-test_1 {
+			compatible = "sandbox,nop_sandbox2";
+			bind = "True";
+		};
+		nop-test_2 {
+			compatible = "sandbox,nop_sandbox2";
+			bind = "False";
+		};
+	};
+
 	misc-test {
 		compatible = "sandbox,misc_sandbox";
 	};

drivers/core/uclass.c

@@ -757,3 +757,8 @@ int uclass_pre_remove_device(struct udevice *dev)
 	return 0;
 }
 #endif
+
+UCLASS_DRIVER(nop) = {
+	.id		= UCLASS_NOP,
+	.name		= "nop",
+};

drivers/usb/dwc3/dwc3-generic.c

@@ -337,7 +337,7 @@ static int dwc3_glue_remove(struct udevice *dev)
 
 	clk_release_bulk(&glue->clks);
 
-	return dm_scan_fdt_dev(dev);
+	return 0;
 }
 
 static const struct udevice_id dwc3_glue_ids[] = {
@@ -350,7 +350,7 @@ static const struct udevice_id dwc3_glue_ids[] = {
 
 U_BOOT_DRIVER(dwc3_generic_wrapper) = {
 	.name	= "dwc3-generic-wrapper",
-	.id	= UCLASS_MISC,
+	.id	= UCLASS_NOP,
 	.of_match = dwc3_glue_ids,
 	.bind = dwc3_glue_bind,
 	.probe = dwc3_glue_probe,

drivers/usb/host/ehci-mx6.c

@@ -503,6 +503,42 @@ static int ehci_usb_ofdata_to_platdata(struct udevice *dev)
 	return 0;
 }
 
+static int ehci_usb_bind(struct udevice *dev)
+{
+	/*
+	 * TODO:
+	 * This driver is only partly converted to DT probing and still uses
+	 * a tremendous amount of hard-coded addresses. To make things worse,
+	 * the driver depends on specific sequential indexing of controllers,
+	 * from which it derives offsets in the PHY and ANATOP register sets.
+	 *
+	 * Here we attempt to calculate these indexes from DT information as
+	 * well as we can. The USB controllers on all existing iMX6/iMX7 SoCs
+	 * are placed next to each other, at addresses incremented by 0x200.
+	 * Thus, the index is derived from the multiple of 0x200 offset from
+	 * the first controller address.
+	 *
+	 * However, to complete conversion of this driver to DT probing, the
+	 * following has to be done:
+	 * - DM clock framework support for iMX must be implemented
+	 * - usb_power_config() has to be converted to clock framework
+	 *   -> Thus, the ad-hoc "index" variable goes away.
+	 * - USB PHY handling has to be factored out into separate driver
+	 *   -> Thus, the ad-hoc "index" variable goes away from the PHY
+	 *      code, the PHY driver must parse it's address from DT. This
+	 *      USB driver must find the PHY driver via DT phandle.
+	 *   -> usb_power_config() shall be moved to PHY driver
+	 * With these changes in place, the ad-hoc indexing goes away and
+	 * the driver is fully converted to DT probing.
+	 */
+	fdt_size_t size;
+	fdt_addr_t addr = devfdt_get_addr_size_index(dev, 0, &size);
+
+	dev->req_seq = (addr - USB_BASE_ADDR) / size;
+
+	return 0;
+}
+
 static int ehci_usb_probe(struct udevice *dev)
 {
 	struct usb_platdata *plat = dev_get_platdata(dev);
@@ -564,6 +600,7 @@ U_BOOT_DRIVER(usb_mx6) = {
 	.id	= UCLASS_USB,
 	.of_match = mx6_usb_ids,
 	.ofdata_to_platdata = ehci_usb_ofdata_to_platdata,
+	.bind	= ehci_usb_bind,
 	.probe	= ehci_usb_probe,
 	.remove = ehci_deregister,
 	.ops	= &ehci_usb_ops,

include/dm/uclass-id.h

@@ -62,6 +62,7 @@ enum uclass_id {
 	UCLASS_MMC,		/* SD / MMC card or chip */
 	UCLASS_MOD_EXP,		/* RSA Mod Exp device */
 	UCLASS_MTD,		/* Memory Technology Device (MTD) device */
+	UCLASS_NOP,		/* No-op devices */
 	UCLASS_NORTHBRIDGE,	/* Intel Northbridge / SDRAM controller */
 	UCLASS_NVME,		/* NVM Express device */
 	UCLASS_PANEL,		/* Display panel, such as an LCD */

test/dm/Makefile

@@ -3,6 +3,7 @@
 # Copyright (c) 2013 Google, Inc
 
 obj-$(CONFIG_UT_DM) += bus.o
+obj-$(CONFIG_UT_DM) += nop.o
 obj-$(CONFIG_UT_DM) += test-driver.o
 obj-$(CONFIG_UT_DM) += test-fdt.o
 obj-$(CONFIG_UT_DM) += test-main.o

test/dm/nop.c

@@ -0,0 +1,73 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Test for the NOP uclass
+ *
+ * (C) Copyright 2019 - Texas Instruments Incorporated - http://www.ti.com/
+ * Jean-Jacques Hiblot <jjhiblot@ti.com>
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <dm/ofnode.h>
+#include <dm/lists.h>
+#include <dm/device.h>
+#include <dm/test.h>
+#include <misc.h>
+#include <test/ut.h>
+
+static int noptest_bind(struct udevice *parent)
+{
+	ofnode ofnode = dev_read_first_subnode(parent);
+
+	while (ofnode_valid(ofnode)) {
+		struct udevice *dev;
+		const char *bind_flag = ofnode_read_string(ofnode, "bind");
+
+		if (bind_flag && (strcmp(bind_flag, "True") == 0))
+			lists_bind_fdt(parent, ofnode, &dev, false);
+		ofnode = dev_read_next_subnode(ofnode);
+	}
+
+	return 0;
+}
+
+static const struct udevice_id noptest1_ids[] = {
+	{
+		.compatible = "sandbox,nop_sandbox1",
+	},
+	{ }
+};
+
+U_BOOT_DRIVER(noptest_drv1) = {
+	.name	= "noptest1_drv",
+	.of_match	= noptest1_ids,
+	.id	= UCLASS_NOP,
+	.bind = noptest_bind,
+};
+
+static const struct udevice_id noptest2_ids[] = {
+	{
+		.compatible = "sandbox,nop_sandbox2",
+	},
+	{ }
+};
+
+U_BOOT_DRIVER(noptest_drv2) = {
+	.name	= "noptest2_drv",
+	.of_match	= noptest2_ids,
+	.id	= UCLASS_NOP,
+};
+
+static int dm_test_nop(struct unit_test_state *uts)
+{
+	struct udevice *dev;
+
+	ut_assertok(uclass_get_device_by_name(UCLASS_NOP, "nop-test_0", &dev));
+	ut_assertok(uclass_get_device_by_name(UCLASS_NOP, "nop-test_1", &dev));
+	ut_asserteq(-ENODEV,
+		    uclass_get_device_by_name(UCLASS_NOP, "nop-test_2", &dev));
+
+	return 0;
+}
+
+DM_TEST(dm_test_nop, DM_TESTF_FLAT_TREE | DM_TESTF_SCAN_FDT);