[PATCH 11/17] mtd: nand_mrvl_nfc: Add hwflags to distinguish different HW versions

[Sebastian Hesselbarth]

Marvell PXA3xx NAND flash controller IP has been reused in later SoCs
with additional HW features. Add HW BCH ECC as the first known HW
difference.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth at gmail.com>
---
Cc: Robert Jarzmik <robert.jarzmik at free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>
Cc: Ezequiel Garcia <ezequiel at vanguardiasur.com.ar>
Cc: barebox at lists.infradead.org
---
 drivers/mtd/nand/nand_mrvl_nfc.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/mtd/nand/nand_mrvl_nfc.c b/drivers/mtd/nand/nand_mrvl_nfc.c
index 5ff5ed72ff49..8a05fc88824b 100644
--- a/drivers/mtd/nand/nand_mrvl_nfc.c
+++ b/drivers/mtd/nand/nand_mrvl_nfc.c
@@ -142,6 +142,8 @@ struct mrvl_nand_host {
 	size_t			read_id_bytes;
 
 	void __iomem		*mmio_base;
+	unsigned int		hwflags;
+#define HWFLAGS_ECC_BCH		BIT(0)
 
 	unsigned int		buf_start;
 	unsigned int		buf_count;
@@ -234,9 +236,12 @@ static struct nand_ecclayout ecc_layout_2KB_hwecc = {
 #define mtd_info_to_host(mtd) ((struct mrvl_nand_host *) \
 			       (((struct nand_chip *)((mtd)->priv))->priv))
 
+const unsigned int pxa3xx_hwflags;
+
 static struct of_device_id mrvl_nand_dt_ids[] = {
 	{
 		.compatible = "marvell,pxa3xx-nand",
+		.data = &pxa3xx_hwflags,
 	},
 	{}
 };
@@ -1004,6 +1009,8 @@ static struct mrvl_nand_host *alloc_nand_resource(struct device_d *dev)
 static int mrvl_nand_probe_dt(struct mrvl_nand_host *host)
 {
 	struct device_node *np = host->dev->device_node;
+	const struct of_device_id *match =
+		of_match_node(mrvl_nand_dt_ids, np);
 
 	of_property_read_u32(np, "num-cs", &host->num_cs);
 	if (of_get_nand_on_flash_bbt(np))
@@ -1017,6 +1024,8 @@ static int mrvl_nand_probe_dt(struct mrvl_nand_host *host)
 	if (host->ecc_step < 0)
 		host->ecc_step = 0;
 
+	host->hwflags = ((unsigned int *)match->data)[0];
+
 	return 0;
 }
 
-- 
2.1.0