From: William Zhang william.zhang@broadcom.com
Backport of upstream Linux commit 8e7daa85641c9559c113f6b217bdc923397de77c "mtd: rawnand: brcmnand: Support write protection setting from dts"
The write protection feature is controlled by the module parameter wp_on with default set to enabled. But not all the board use this feature especially in BCMBCA broadband board. And module parameter is not sufficient as different board can have different option. Add a device tree property and allow this feature to be configured through the board dts on per board basis.
Signed-off-by: William Zhang william.zhang@broadcom.com Reviewed-by: Florian Fainelli florian.fainelli@broadcom.com Reviewed-by: Kamal Dasu kamal.dasu@broadcom.com Reviewed-by: David Regan dregan@broadcom.com Signed-off-by: Miquel Raynal miquel.raynal@bootlin.com Link: https://lore.kernel.org/linux-mtd/20240223034758.13753-14-william.zhang@broa... Signed-off-by: Linus Walleij linus.walleij@linaro.org --- drivers/mtd/nand/raw/brcmnand/brcmnand.c | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/drivers/mtd/nand/raw/brcmnand/brcmnand.c b/drivers/mtd/nand/raw/brcmnand/brcmnand.c index 2f786584a1ae..55d5d27438a8 100644 --- a/drivers/mtd/nand/raw/brcmnand/brcmnand.c +++ b/drivers/mtd/nand/raw/brcmnand/brcmnand.c @@ -2847,6 +2847,14 @@ int brcmnand_probe(struct udevice *dev, struct brcmnand_soc *soc) /* Read the write-protect configuration in the device tree */ wp_on = dev_read_u32_default(dev, "write-protect", wp_on);
+ /* Check if the board connects the WP pin */ +#ifndef __UBOOT__ + if (of_property_read_bool(dn, "brcm,wp-not-connected")) +#else + if (dev_read_bool(ctrl->dev, "brcm,wp-not-connected")) +#endif /* __UBOOT__ */ + wp_on = 0; + if (ctrl->features & BRCMNAND_HAS_WP) { /* Permanently disable write protection */ if (wp_on == 2)