v4.19.13 snapshot.
diff --git a/drivers/mtd/maps/sun_uflash.c b/drivers/mtd/maps/sun_uflash.c
new file mode 100644
index 0000000..1e73bba
--- /dev/null
+++ b/drivers/mtd/maps/sun_uflash.c
@@ -0,0 +1,159 @@
+/* sun_uflash.c - Driver for user-programmable flash on
+ * Sun Microsystems SME boardsets.
+ *
+ * This driver does NOT provide access to the OBP-flash for
+ * safety reasons-- use <linux>/drivers/sbus/char/flash.c instead.
+ *
+ * Copyright (c) 2001 Eric Brower (ebrower@usa.net)
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/fs.h>
+#include <linux/errno.h>
+#include <linux/ioport.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/slab.h>
+#include <asm/prom.h>
+#include <linux/uaccess.h>
+#include <asm/io.h>
+
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/map.h>
+
+#define UFLASH_OBPNAME "flashprom"
+#define DRIVER_NAME "sun_uflash"
+#define PFX DRIVER_NAME ": "
+
+#define UFLASH_WINDOW_SIZE 0x200000
+#define UFLASH_BUSWIDTH 1 /* EBus is 8-bit */
+
+MODULE_AUTHOR("Eric Brower <ebrower@usa.net>");
+MODULE_DESCRIPTION("User-programmable flash device on Sun Microsystems boardsets");
+MODULE_SUPPORTED_DEVICE(DRIVER_NAME);
+MODULE_LICENSE("GPL");
+MODULE_VERSION("2.1");
+
+struct uflash_dev {
+ const char *name; /* device name */
+ struct map_info map; /* mtd map info */
+ struct mtd_info *mtd; /* mtd info */
+};
+
+struct map_info uflash_map_templ = {
+ .name = "SUNW,???-????",
+ .size = UFLASH_WINDOW_SIZE,
+ .bankwidth = UFLASH_BUSWIDTH,
+};
+
+int uflash_devinit(struct platform_device *op, struct device_node *dp)
+{
+ struct uflash_dev *up;
+
+ if (op->resource[1].flags) {
+ /* Non-CFI userflash device-- once I find one we
+ * can work on supporting it.
+ */
+ printk(KERN_ERR PFX "Unsupported device at %pOF, 0x%llx\n",
+ dp, (unsigned long long)op->resource[0].start);
+
+ return -ENODEV;
+ }
+
+ up = kzalloc(sizeof(struct uflash_dev), GFP_KERNEL);
+ if (!up) {
+ printk(KERN_ERR PFX "Cannot allocate struct uflash_dev\n");
+ return -ENOMEM;
+ }
+
+ /* copy defaults and tweak parameters */
+ memcpy(&up->map, &uflash_map_templ, sizeof(uflash_map_templ));
+
+ up->map.size = resource_size(&op->resource[0]);
+
+ up->name = of_get_property(dp, "model", NULL);
+ if (up->name && 0 < strlen(up->name))
+ up->map.name = up->name;
+
+ up->map.phys = op->resource[0].start;
+
+ up->map.virt = of_ioremap(&op->resource[0], 0, up->map.size,
+ DRIVER_NAME);
+ if (!up->map.virt) {
+ printk(KERN_ERR PFX "Failed to map device.\n");
+ kfree(up);
+
+ return -EINVAL;
+ }
+
+ simple_map_init(&up->map);
+
+ /* MTD registration */
+ up->mtd = do_map_probe("cfi_probe", &up->map);
+ if (!up->mtd) {
+ of_iounmap(&op->resource[0], up->map.virt, up->map.size);
+ kfree(up);
+
+ return -ENXIO;
+ }
+
+ up->mtd->owner = THIS_MODULE;
+
+ mtd_device_register(up->mtd, NULL, 0);
+
+ dev_set_drvdata(&op->dev, up);
+
+ return 0;
+}
+
+static int uflash_probe(struct platform_device *op)
+{
+ struct device_node *dp = op->dev.of_node;
+
+ /* Flashprom must have the "user" property in order to
+ * be used by this driver.
+ */
+ if (!of_find_property(dp, "user", NULL))
+ return -ENODEV;
+
+ return uflash_devinit(op, dp);
+}
+
+static int uflash_remove(struct platform_device *op)
+{
+ struct uflash_dev *up = dev_get_drvdata(&op->dev);
+
+ if (up->mtd) {
+ mtd_device_unregister(up->mtd);
+ map_destroy(up->mtd);
+ }
+ if (up->map.virt) {
+ of_iounmap(&op->resource[0], up->map.virt, up->map.size);
+ up->map.virt = NULL;
+ }
+
+ kfree(up);
+
+ return 0;
+}
+
+static const struct of_device_id uflash_match[] = {
+ {
+ .name = UFLASH_OBPNAME,
+ },
+ {},
+};
+
+MODULE_DEVICE_TABLE(of, uflash_match);
+
+static struct platform_driver uflash_driver = {
+ .driver = {
+ .name = DRIVER_NAME,
+ .of_match_table = uflash_match,
+ },
+ .probe = uflash_probe,
+ .remove = uflash_remove,
+};
+
+module_platform_driver(uflash_driver);