mtd: nand: davinci: adjust DT properties to MTD generic

The properties davinci-ecc-mode, davinci-nand-use-bbt, davinci-nand-buswidth
are MTD generic. Correct names for them are: nand-ecc-mode, nand-on-flash-bbt,
nand-bus-width accordingly. So rename them in dts and documentation.
Reviewed-by: Grygorii Strashko <grygorii.strashko@ti.com>
Reviewed-by: Taras Kondratiuk <taras@ti.com>
Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@ti.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>

Documentation/devicetree/bindings/mtd/davinci-nand.txt

@@ -37,7 +37,7 @@ Recommended properties :
 - ti,davinci-mask-chipsel:	mask for chipselect address. Needed to mask
 				addresses for given chipselect.
 
-- ti,davinci-ecc-mode:		operation mode of the NAND ecc mode. ECC mode
+- nand-ecc-mode:		operation mode of the NAND ecc mode. ECC mode
 				valid values for davinci driver:
 				- "none"
 				- "soft"
@@ -45,10 +45,25 @@ Recommended properties :
 
 - ti,davinci-ecc-bits:		used ECC bits, currently supported 1 or 4.
 
-- ti,davinci-nand-buswidth:	buswidth 8 or 16.
+- nand-bus-width:		buswidth 8 or 16. If not present 8.
+
+- nand-on-flash-bbt:		use flash based bad block table support. OOB
+				identifier is saved in OOB area. If not present
+				false.
+
+Deprecated properties:
+
+- ti,davinci-ecc-mode:		operation mode of the NAND ecc mode. ECC mode
+				valid values for davinci driver:
+				- "none"
+				- "soft"
+				- "hw"
+
+- ti,davinci-nand-buswidth:	buswidth 8 or 16. If not present 8.
 
 - ti,davinci-nand-use-bbt:	use flash based bad block table support. OOB
-				identifier is saved in OOB area.
+				identifier is saved in OOB area. If not present
+				false.
 
 Nand device bindings may contain additional sub-nodes describing partitions of
 the address space. See partition.txt for more detail. The NAND Flash timing
@@ -66,9 +81,9 @@ nand_cs3@62000000 {
 	ti,davinci-mask-ale = <0>;
 	ti,davinci-mask-cle = <0>;
 	ti,davinci-mask-chipsel = <0>;
-	ti,davinci-ecc-mode = "hw";
+	nand-ecc-mode = "hw";
 	ti,davinci-ecc-bits = <4>;
-	ti,davinci-nand-use-bbt;
+	nand-on-flash-bbt;
 
 	partition@180000 {
 		label = "ubifs";

drivers/mtd/nand/davinci_nand.c

@@ -35,6 +35,7 @@
 #include <linux/slab.h>
 #include <linux/of_device.h>
 #include <linux/of.h>
+#include <linux/of_mtd.h>
 
 #include <linux/platform_data/mtd-davinci.h>
 #include <linux/platform_data/mtd-davinci-aemif.h>
@@ -534,7 +535,6 @@ static struct davinci_nand_pdata
 		struct davinci_nand_pdata *pdata;
 		const char *mode;
 		u32 prop;
-		int len;
 
 		pdata =  devm_kzalloc(&pdev->dev,
 				sizeof(struct davinci_nand_pdata),
@@ -558,6 +558,8 @@ static struct davinci_nand_pdata
 			"ti,davinci-mask-chipsel", &prop))
 			pdata->mask_chipsel = prop;
 		if (!of_property_read_string(pdev->dev.of_node,
+			"nand-ecc-mode", &mode) ||
+		    !of_property_read_string(pdev->dev.of_node,
 			"ti,davinci-ecc-mode", &mode)) {
 			if (!strncmp("none", mode, 4))
 				pdata->ecc_mode = NAND_ECC_NONE;
@@ -569,12 +571,16 @@ static struct davinci_nand_pdata
 		if (!of_property_read_u32(pdev->dev.of_node,
 			"ti,davinci-ecc-bits", &prop))
 			pdata->ecc_bits = prop;
-		if (!of_property_read_u32(pdev->dev.of_node,
+
+		prop = of_get_nand_bus_width(pdev->dev.of_node);
+		if (0 < prop || !of_property_read_u32(pdev->dev.of_node,
 			"ti,davinci-nand-buswidth", &prop))
 			if (prop == 16)
 				pdata->options |= NAND_BUSWIDTH_16;
-		if (of_find_property(pdev->dev.of_node,
-			"ti,davinci-nand-use-bbt", &len))
+		if (of_property_read_bool(pdev->dev.of_node,
+			"nand-on-flash-bbt") ||
+		    of_property_read_bool(pdev->dev.of_node,
+			"ti,davinci-nand-use-bbt"))
 			pdata->bbt_options = NAND_BBT_USE_FLASH;
 	}