summaryrefslogtreecommitdiff
path: root/target/linux/ramips/patches-4.4/0054-mtd-add-chunked-read-io-to-m25p80.patch
diff options
context:
space:
mode:
Diffstat (limited to 'target/linux/ramips/patches-4.4/0054-mtd-add-chunked-read-io-to-m25p80.patch')
-rw-r--r--target/linux/ramips/patches-4.4/0054-mtd-add-chunked-read-io-to-m25p80.patch123
1 files changed, 0 insertions, 123 deletions
diff --git a/target/linux/ramips/patches-4.4/0054-mtd-add-chunked-read-io-to-m25p80.patch b/target/linux/ramips/patches-4.4/0054-mtd-add-chunked-read-io-to-m25p80.patch
deleted file mode 100644
index 8eef3af..0000000
--- a/target/linux/ramips/patches-4.4/0054-mtd-add-chunked-read-io-to-m25p80.patch
+++ /dev/null
@@ -1,123 +0,0 @@
---- a/drivers/mtd/spi-nor/spi-nor.c
-+++ b/drivers/mtd/spi-nor/spi-nor.c
-@@ -1014,6 +1014,66 @@ write_err:
- return ret;
- }
-
-+static int spi_nor_chunked_write(struct mtd_info *mtd, loff_t _to, size_t _len,
-+ size_t *_retlen, const u_char *_buf)
-+{
-+ struct spi_nor *nor = mtd_to_spi_nor(mtd);
-+ int chunk_size;
-+ int retlen = 0;
-+ int ret;
-+
-+ chunk_size = nor->chunk_size;
-+ if (!chunk_size)
-+ chunk_size = _len;
-+
-+ if (nor->addr_width > 3)
-+ chunk_size -= nor->addr_width - 3;
-+
-+ while (retlen < _len) {
-+ size_t len = min_t(int, chunk_size, _len - retlen);
-+ const u_char *buf = _buf + retlen;
-+ loff_t to = _to + retlen;
-+
-+ if (nor->flags & SNOR_F_SST)
-+ ret = sst_write(mtd, to, len, &retlen, buf);
-+ else
-+ ret = spi_nor_write(mtd, to, len, &retlen, buf);
-+ if (ret)
-+ return ret;
-+ }
-+
-+ *_retlen += retlen;
-+ return 0;
-+}
-+
-+static int spi_nor_chunked_read(struct mtd_info *mtd, loff_t _from, size_t _len,
-+ size_t *_retlen, u_char *_buf)
-+{
-+ struct spi_nor *nor = mtd_to_spi_nor(mtd);
-+ int chunk_size;
-+ int ret;
-+
-+ chunk_size = nor->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;
-+
-+ ret = spi_nor_read(mtd, from, len, &retlen, buf);
-+ if (ret)
-+ return ret;
-+
-+ *_retlen += retlen;
-+ }
-+
-+ return 0;
-+}
-+
- static int macronix_quad_enable(struct spi_nor *nor)
- {
- int ret, val;
-@@ -1194,10 +1254,12 @@ int spi_nor_scan(struct spi_nor *nor, co
- }
-
- /* sst nor chips use AAI word program */
-- if (info->flags & SST_WRITE)
-+ if (info->flags & SST_WRITE) {
- mtd->_write = sst_write;
-- else
-+ nor->flags |= SNOR_F_SST;
-+ } else {
- mtd->_write = spi_nor_write;
-+ }
-
- if (info->flags & USE_FSR)
- nor->flags |= SNOR_F_USE_FSR;
-@@ -1225,11 +1287,20 @@ int spi_nor_scan(struct spi_nor *nor, co
- mtd->writebufsize = nor->page_size;
-
- if (np) {
-+ u32 val;
-+
- /* If we were instantiated by DT, use it */
- if (of_property_read_bool(np, "m25p,fast-read"))
- nor->flash_read = SPI_NOR_FAST;
- else
- nor->flash_read = SPI_NOR_NORMAL;
-+
-+ if (!of_property_read_u32(np, "m25p,chunked-io", &val)) {
-+ dev_info(dev, "using chunked io (size=%d)\n", val);
-+ mtd->_read = spi_nor_chunked_read;
-+ mtd->_write = spi_nor_chunked_write;
-+ nor->chunk_size = val;
-+ }
- } else {
- /* If we weren't instantiated by DT, default to fast-read */
- nor->flash_read = SPI_NOR_FAST;
---- a/include/linux/mtd/spi-nor.h
-+++ b/include/linux/mtd/spi-nor.h
-@@ -116,6 +116,7 @@ enum spi_nor_ops {
-
- enum spi_nor_option_flags {
- SNOR_F_USE_FSR = BIT(0),
-+ SNOR_F_SST = BIT(1),
- };
-
- /**
-@@ -156,6 +157,7 @@ struct spi_nor {
- struct device *dev;
- struct device_node *flash_node;
- u32 page_size;
-+ u16 chunk_size;
- u8 addr_width;
- u8 erase_opcode;
- u8 read_opcode;