[RESEND PATCH V2 14/17] MTD: MIPS: lantiq: verify that the NOR interface is available on falcon soc

[John Crispin]

When running on a FALC-ON SoC, we need to check the bootstrap options to see
if NOR is available.

Signed-off-by: John Crispin <blogic at openwrt.org>
Cc: linux-mtd at lists.infradead.org
---
This patch is part of a series moving the mips/lantiq target to OF and clkdev
support. The patch, once Acked, should go upstream via Ralf's MIPS tree.

 drivers/mtd/maps/lantiq-flash.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/drivers/mtd/maps/lantiq-flash.c b/drivers/mtd/maps/lantiq-flash.c
index aefa111..c03456f 100644
--- a/drivers/mtd/maps/lantiq-flash.c
+++ b/drivers/mtd/maps/lantiq-flash.c
@@ -19,6 +19,7 @@
 #include <linux/mtd/cfi.h>
 #include <linux/platform_device.h>
 #include <linux/mtd/physmap.h>
+#include <linux/of.h>
 
 #include <lantiq_soc.h>
 
@@ -116,6 +117,12 @@ ltq_mtd_probe(struct platform_device *pdev)
 	struct cfi_private *cfi;
 	int err;
 
+	if (of_machine_is_compatible("lantiq,falcon") &&
+			(ltq_boot_select() != BS_FLASH)) {
+		dev_err(&pdev->dev, "invalid bootstrap options\n");
+		return -ENODEV;
+	}
+
 	ltq_mtd = kzalloc(sizeof(struct ltq_mtd), GFP_KERNEL);
 	platform_set_drvdata(pdev, ltq_mtd);
 
-- 
1.7.9.1