Generic function for spi-flash memory reading.
Signed-off-by: Jagan Teki jteki@openedev.com --- Changes for v3: - none Changes for v2: - none
drivers/mtd/spi/sf.c | 23 +++++++++++++++++++++++ drivers/mtd/spi/sf_internal.h | 3 +++ 2 files changed, 26 insertions(+)
diff --git a/drivers/mtd/spi/sf.c b/drivers/mtd/spi/sf.c index cb36946..2670207 100644 --- a/drivers/mtd/spi/sf.c +++ b/drivers/mtd/spi/sf.c @@ -79,3 +79,26 @@ int flash_read_reg(struct spi_flash *flash, u8 cmd, u8 *val, int len)
return ret; } + +int flash_read(struct spi_flash *flash, const u8 *cmd, size_t cmd_len, + void *data, size_t data_len) +{ + struct spi_slave *spi = flash->spi; + int ret; + + ret = spi_claim_bus(spi); + if (ret < 0) { + debug("SF: unable to claim SPI bus\n"); + return ret; + } + + ret = spi_flash_read_write(spi, cmd, cmd_len, NULL, data, data_len); + if (ret < 0) { + debug("SF: error %d reading %x\n", ret, *cmd); + return ret; + } + + spi_release_bus(spi); + + return ret; +} diff --git a/drivers/mtd/spi/sf_internal.h b/drivers/mtd/spi/sf_internal.h index 9341fb3..4dfc67d 100644 --- a/drivers/mtd/spi/sf_internal.h +++ b/drivers/mtd/spi/sf_internal.h @@ -159,6 +159,9 @@ int spi_flash_cmd_read(struct spi_slave *spi, const u8 *cmd, /* Read flash register - common call for all flash register reads */ int flash_read_reg(struct spi_flash *flash, u8 cmd, u8 *val, int len);
+/* Read flash memory - Read data from spi flash */ +int flash_read(struct spi_flash *flash, const u8 *cmd, size_t cmd_len, + void *data, size_t data_len); /* * Send a multi-byte command to the device followed by (optional) * data. Used for programming the flash array, etc.