ar71xx: Add kernel 4.9 support

[openwrt/openwrt.git] / target / linux / ar71xx / files / drivers / mtd / nand / rb4xx_nand.c

diff --git a/target/linux/ar71xx/files/drivers/mtd/nand/rb4xx_nand.c b/target/linux/ar71xx/files/drivers/mtd/nand/rb4xx_nand.c
index 96ec5dd1e59650cbd12462336fc2401f1dde9cb3..b397575f7725ab6e905e0f8dbc6031b22f9e9441 100644 (file)
--- a/target/linux/ar71xx/files/drivers/mtd/nand/rb4xx_nand.c
+++ b/target/linux/ar71xx/files/drivers/mtd/nand/rb4xx_nand.c
@@ -23,6 +23,7 @@
 #include <linux/io.h>
 #include <linux/gpio.h>
 #include <linux/slab.h>
+#include <linux/version.h>
 
 #include <asm/mach-ath79/ath79.h>
 #include <asm/mach-ath79/rb4xx_cpld.h>
@@ -41,6 +42,7 @@ struct rb4xx_nand_info {
        struct mtd_info         mtd;
 };
 
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4,6,0)
 /*
  * We need to use the OLD Yaffs-1 OOB layout, otherwise the RB bootloader
  * will not be able to find the kernel that we load.
@@ -52,6 +54,56 @@ static struct nand_ecclayout rb4xx_nand_ecclayout = {
        .oobfree        = { { 0, 4 }, { 6, 2 }, { 11, 2 }, { 4, 1 } }
 };
 
+#else
+
+static int rb4xx_ooblayout_ecc(struct mtd_info *mtd, int section,
+                              struct mtd_oob_region *oobregion)
+{
+       switch (section) {
+       case 0:
+               oobregion->offset = 8;
+               oobregion->length = 3;
+               return 0;
+       case 1:
+               oobregion->offset = 13;
+               oobregion->length = 3;
+               return 0;
+       default:
+               return -ERANGE;
+       }
+}
+
+static int rb4xx_ooblayout_free(struct mtd_info *mtd, int section,
+                               struct mtd_oob_region *oobregion)
+{
+       switch (section) {
+       case 0:
+               oobregion->offset = 0;
+               oobregion->length = 4;
+               return 0;
+       case 1:
+               oobregion->offset = 4;
+               oobregion->length = 1;
+               return 0;
+       case 2:
+               oobregion->offset = 6;
+               oobregion->length = 2;
+               return 0;
+       case 3:
+               oobregion->offset = 11;
+               oobregion->length = 2;
+               return 0;
+       default:
+               return -ERANGE;
+       }
+}
+
+static const struct mtd_ooblayout_ops rb4xx_nand_ecclayout_ops = {
+       .ecc = rb4xx_ooblayout_ecc,
+       .free = rb4xx_ooblayout_free,
+};
+#endif /* < 4.6 */
+
 static struct mtd_partition rb4xx_nand_partitions[] = {
        {
                .name   = "booter",
@@ -229,7 +281,11 @@ static int rb4xx_nand_probe(struct platform_device *pdev)
        }
 
        if (info->mtd.writesize == 512)
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4,6,0)
                info->chip.ecc.layout = &rb4xx_nand_ecclayout;
+#else
+               mtd_set_ooblayout(&info->mtd, &rb4xx_nand_ecclayout_ops);
+#endif
 
        ret = nand_scan_tail(&info->mtd);
        if (ret) {