[PATCH] mtd: powernv: Support MTD_NO_ERASE

William A. Kennington III
2017-09-05T20:24:06Z

As of skiboot@ba99af9b149d02438347b055e6e7d6bd15e33551, we now support
adding a device tree entry which marks a flash device as not needing
erase. This patch adds support for setting MTD_NO_ERASE on powernvflash
devices which have the property no-erase.

Signed-off-by: William A. Kennington III <wak@google.com>
---
drivers/mtd/devices/powernv_flash.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/drivers/mtd/devices/powernv_flash.c b/drivers/mtd/devices/powernv_flash.c
index f5396f26ddb4..fab9f9121b4c 100644
--- a/drivers/mtd/devices/powernv_flash.c
+++ b/drivers/mtd/devices/powernv_flash.c
@@ -196,6 +196,8 @@ static int powernv_flash_set_driver_info(struct device *dev,
mtd->name = of_get_property(dev->of_node, "name", NULL);
mtd->type = MTD_NORFLASH;
mtd->flags = MTD_WRITEABLE;
+ if (of_property_read_bool(dev->of_node, "no-erase"))
+ mtd->flags |= MTD_NO_ERASE;
mtd->size = size;
mtd->erasesize = erase_size;
mtd->writebufsize = mtd->writesize = 1;
--
2.13.1