ramips: use separated mtd patch reverting write_page() removal

This helps understanding mtd changes needed to get downstream NAND
driver working.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
(backported from 9a3c805584b6adf3fa4f0db5c127a056b0c6d667)

diff --git a/target/linux/ramips/patches-4.14/0038-Revert-mtd-nand-Remove-unused-chip-write_page-hook.patch b/target/linux/ramips/patches-4.14/0038-Revert-mtd-nand-Remove-unused-chip-write_page-hook.patch
new file mode 100644 (file)
index 0000000..4758f18
--- /dev/null
+++ b/target/linux/ramips/patches-4.14/0038-Revert-mtd-nand-Remove-unused-chip-write_page-hook.patch
@@ -0,0 +1,67 @@
+From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
+Subject: [PATCH] Revert "mtd: nand: Remove unused chip->write_page() hook"
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+This reverts commit f107d7a43923a83d837b3ea3c7b7de58cd014bbd.
+
+OpenWrt's downstream driver mtk_nand2 still uses that callback.
+
+Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
+---
+
+--- a/drivers/mtd/nand/nand_base.c
++++ b/drivers/mtd/nand/nand_base.c
+@@ -2577,7 +2577,7 @@ static int nand_write_page_syndrome(stru
+ }
+ 
+ /**
+- * nand_write_page - write one page
++ * nand_write_page - [REPLACEABLE] write one page
+  * @mtd: MTD device structure
+  * @chip: NAND chip descriptor
+  * @offset: address offset within the page
+@@ -2761,9 +2761,9 @@ static int nand_do_write_ops(struct mtd_
+                       memset(chip->oob_poi, 0xff, mtd->oobsize);
+               }
+ 
+-              ret = nand_write_page(mtd, chip, column, bytes, wbuf,
+-                                    oob_required, page,
+-                                    (ops->mode == MTD_OPS_RAW));
++              ret = chip->write_page(mtd, chip, column, bytes, wbuf,
++                                      oob_required, page,
++                                      (ops->mode == MTD_OPS_RAW));
+               if (ret)
+                       break;
+ 
+@@ -4719,6 +4719,9 @@ int nand_scan_tail(struct mtd_info *mtd)
+               }
+       }
+ 
++      if (!chip->write_page)
++              chip->write_page = nand_write_page;
++
+       /*
+        * Check ECC mode, default to software if 3byte/512byte hardware ECC is
+        * selected and we have 256 byte pagesize fallback to software ECC
+--- a/include/linux/mtd/rawnand.h
++++ b/include/linux/mtd/rawnand.h
+@@ -862,6 +862,7 @@ struct nand_manufacturer_ops {
+  *                    structure which is shared among multiple independent
+  *                    devices.
+  * @priv:             [OPTIONAL] pointer to private chip data
++ * @write_page:               [REPLACEABLE] High-level page write function
+  * @manufacturer:     [INTERN] Contains manufacturer information
+  */
+ 
+@@ -885,6 +886,9 @@ struct nand_chip {
+       int(*waitfunc)(struct mtd_info *mtd, struct nand_chip *this);
+       int (*erase)(struct mtd_info *mtd, int page);
+       int (*scan_bbt)(struct mtd_info *mtd);
++      int (*write_page)(struct mtd_info *mtd, struct nand_chip *chip,
++                      uint32_t offset, int data_len, const uint8_t *buf,
++                      int oob_required, int page, int raw);
+       int (*onfi_set_features)(struct mtd_info *mtd, struct nand_chip *chip,
+                       int feature_addr, uint8_t *subfeature_para);
+       int (*onfi_get_features)(struct mtd_info *mtd, struct nand_chip *chip,

diff --git a/target/linux/ramips/patches-4.14/0040-nand-hack.patch b/target/linux/ramips/patches-4.14/0040-nand-hack.patch
index c906d7fa6a65c87a8d55eeb07e2f5160d2046553..58cdf1bce7ed35cb533a3a5e8efcbc858a3ea018 100644 (file)
--- a/target/linux/ramips/patches-4.14/0040-nand-hack.patch
+++ b/target/linux/ramips/patches-4.14/0040-nand-hack.patch
@@ -18,37 +18,9 @@
                        if (ret < 0) {
                                if (use_bufpoi)
                                        /* Invalidate page cache */
-@@ -2761,9 +2765,14 @@ static int nand_do_write_ops(struct mtd_
-                       memset(chip->oob_poi, 0xff, mtd->oobsize);
-               }
- 
--              ret = nand_write_page(mtd, chip, column, bytes, wbuf,
--                                    oob_required, page,
--                                    (ops->mode == MTD_OPS_RAW));
-+              if (chip->write_page)
-+                      ret = chip->write_page(mtd, chip, column, bytes, wbuf,
-+                                             oob_required, page,
-+                                             (ops->mode == MTD_OPS_RAW));
-+              else
-+                      ret = nand_write_page(mtd, chip, column, bytes, wbuf,
-+                                            oob_required, page,
-+                                            (ops->mode == MTD_OPS_RAW));
-               if (ret)
-                       break;
- 
 --- a/include/linux/mtd/rawnand.h
 +++ b/include/linux/mtd/rawnand.h
-@@ -885,6 +885,9 @@ struct nand_chip {
-       int(*waitfunc)(struct mtd_info *mtd, struct nand_chip *this);
-       int (*erase)(struct mtd_info *mtd, int page);
-       int (*scan_bbt)(struct mtd_info *mtd);
-+      int (*write_page)(struct mtd_info *mtd, struct nand_chip *chip,
-+                      uint32_t offset, int data_len, const uint8_t *buf,
-+                      int oob_required, int page, int raw);
-       int (*onfi_set_features)(struct mtd_info *mtd, struct nand_chip *chip,
-                       int feature_addr, uint8_t *subfeature_para);
-       int (*onfi_get_features)(struct mtd_info *mtd, struct nand_chip *chip,
-@@ -893,6 +896,9 @@ struct nand_chip {
+@@ -897,6 +897,9 @@ struct nand_chip {
        int (*setup_data_interface)(struct mtd_info *mtd, int chipnr,
                                    const struct nand_data_interface *conf);