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-rw-r--r--target/linux/ramips/Makefile2
-rw-r--r--target/linux/ramips/patches-3.18/0044-mtd-add-chunked-read-io-to-m25p80.patch100
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,