diff options
| -rw-r--r-- | target/linux/ramips/Makefile | 2 | ||||
| -rw-r--r-- | target/linux/ramips/patches-3.18/0044-mtd-add-chunked-read-io-to-m25p80.patch | 100 |
2 files changed, 101 insertions, 1 deletions
diff --git a/target/linux/ramips/Makefile b/target/linux/ramips/Makefile index 95577d4af8..5c7a38235d 100644 --- a/target/linux/ramips/Makefile +++ b/target/linux/ramips/Makefile @@ -13,7 +13,7 @@ SUBTARGETS:=rt305x mt7620 mt7621 mt7628 rt3883 rt288x FEATURES:=squashfs gpio MAINTAINER:=John Crispin <blogic@openwrt.org> -KERNEL_PATCHVER:=3.14 +KERNEL_PATCHVER:=3.18 include $(INCLUDE_DIR)/target.mk DEFAULT_PACKAGES += \ diff --git a/target/linux/ramips/patches-3.18/0044-mtd-add-chunked-read-io-to-m25p80.patch b/target/linux/ramips/patches-3.18/0044-mtd-add-chunked-read-io-to-m25p80.patch new file mode 100644 index 0000000000..b014c3e847 --- /dev/null +++ b/target/linux/ramips/patches-3.18/0044-mtd-add-chunked-read-io-to-m25p80.patch @@ -0,0 +1,100 @@ +--- a/drivers/mtd/devices/m25p80.c ++++ b/drivers/mtd/devices/m25p80.c +@@ -19,6 +19,7 @@ + #include <linux/errno.h> + #include <linux/module.h> + #include <linux/device.h> ++#include <linux/of.h> + + #include <linux/mtd/mtd.h> + #include <linux/mtd/partitions.h> +@@ -32,6 +33,7 @@ + struct spi_device *spi; + struct spi_nor spi_nor; + struct mtd_info mtd; ++ u16 chunk_size; + u8 command[MAX_CMD_SIZE]; + }; + +@@ -157,6 +159,58 @@ + return 0; + } + ++static void m25p80_chunked_write(struct spi_nor *nor, loff_t _from, size_t _len, ++ size_t *_retlen, const u_char *_buf) ++{ ++ struct m25p *flash = nor->priv; ++ int chunk_size; ++ int retlen = 0; ++ ++ chunk_size = flash->chunk_size; ++ if (!chunk_size) ++ chunk_size = _len; ++ ++ while (retlen < _len) { ++ size_t len = min_t(int, chunk_size, _len - retlen); ++ const u_char *buf = _buf + retlen; ++ loff_t from = _from + retlen; ++ ++ nor->wait_till_ready(nor); ++ nor->write_reg(nor, SPINOR_OP_WREN, NULL, 0, 0); ++ ++ m25p80_write(nor, from, len, &retlen, buf); ++ } ++ *_retlen += retlen; ++} ++ ++static int m25p80_chunked_read(struct spi_nor *nor, loff_t _from, size_t _len, ++ size_t *_retlen, u_char *_buf) ++{ ++ struct m25p *flash = nor->priv; ++ int chunk_size; ++ ++ chunk_size = flash->chunk_size; ++ if (!chunk_size) ++ chunk_size = _len; ++ ++ *_retlen = 0; ++ ++ while (*_retlen < _len) { ++ size_t len = min_t(int, chunk_size, _len - *_retlen); ++ u_char *buf = _buf + *_retlen; ++ loff_t from = _from + *_retlen; ++ int retlen = 0; ++ int ret = m25p80_read(nor, from, len, &retlen, buf); ++ ++ if (ret) ++ return ret; ++ ++ *_retlen += retlen; ++ } ++ ++ return 0; ++} ++ + static int m25p80_erase(struct spi_nor *nor, loff_t offset) + { + struct m25p *flash = nor->priv; +@@ -197,6 +251,7 @@ + struct spi_nor *nor; + enum read_mode mode = SPI_NOR_NORMAL; + char *flash_name = NULL; ++ u32 val; + int ret; + + data = dev_get_platdata(&spi->dev); +@@ -244,6 +299,14 @@ + if (ret) + return ret; + ++ if (spi->dev.of_node && ++ !of_property_read_u32(spi->dev.of_node, "m25p,chunked-io", &val)) { ++ dev_warn(&spi->dev, "using chunked io\n"); ++ nor->read = m25p80_chunked_read; ++ nor->write = m25p80_chunked_write; ++ flash->chunk_size = val; ++ } ++ + ppdata.of_node = spi->dev.of_node; + + return mtd_device_parse_register(&flash->mtd, NULL, &ppdata, |