1 files changed, 58 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/83xx/usb_837x.c b/arch/powerpc/platforms/83xx/usb_837x.c
new file mode 100644
index 000000000000..726935bb6e2d
--- /dev/null
+++ b/arch/powerpc/platforms/83xx/usb_837x.c
@@ -0,0 +1,58 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Freescale 83xx USB SOC setup code
+ *
+ * Copyright (C) 2007 Freescale Semiconductor, Inc.
+ * Author: Li Yang
+ */
+
+#include <linux/stddef.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/io.h>
+
+#include <sysdev/fsl_soc.h>
+
+#include "mpc83xx.h"
+
+int __init mpc837x_usb_cfg(void)
+{
+	void __iomem *immap;
+	struct device_node *np = NULL;
+	const void *prop;
+	int ret = 0;
+
+	np = of_find_compatible_node(NULL, NULL, "fsl-usb2-dr");
+	if (!np || !of_device_is_available(np)) {
+		of_node_put(np);
+		return -ENODEV;
+	}
+	prop = of_get_property(np, "phy_type", NULL);
+
+	if (!prop || (strcmp(prop, "ulpi") && strcmp(prop, "serial"))) {
+		pr_warn("837x USB PHY type not supported\n");
+		of_node_put(np);
+		return -EINVAL;
+	}
+
+	/* Map IMMR space for pin and clock settings */
+	immap = ioremap(get_immrbase(), 0x1000);
+	if (!immap) {
+		of_node_put(np);
+		return -ENOMEM;
+	}
+
+	/* Configure clock */
+	clrsetbits_be32(immap + MPC83XX_SCCR_OFFS, MPC837X_SCCR_USB_DRCM_11,
+			MPC837X_SCCR_USB_DRCM_11);
+
+	/* Configure pin mux for ULPI/serial */
+	clrsetbits_be32(immap + MPC83XX_SICRL_OFFS, MPC837X_SICRL_USB_MASK,
+			MPC837X_SICRL_USB_ULPI);
+
+	iounmap(immap);
+	of_node_put(np);
+	return ret;
+}