Message ID | 1355934463-24319-3-git-send-email-jagannadh.teki@gmail.com |
---|---|
State | Superseded |
Delegated to: | Mike Frysinger |
Headers | show |
Tested on real hardware, works fine. Tested-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com> Thanks, Jagan. On Wed, Dec 19, 2012 at 9:57 PM, Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com> wrote: > This patch provides support to read a flash status register. > > Status register contains a control bits used to verify > the progress of flash program and erase operations. > > User need to get the data through spi_flash_cmd_read_status() > based on their usage. > > Signed-off-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com> > --- > Changes in v2:none > > drivers/mtd/spi/spi_flash.c | 15 +++++++++++++++ > drivers/mtd/spi/spi_flash_internal.h | 3 +++ > 2 files changed, 18 insertions(+), 0 deletions(-) > > diff --git a/drivers/mtd/spi/spi_flash.c b/drivers/mtd/spi/spi_flash.c > index 9e8939c..bf5ec4a 100644 > --- a/drivers/mtd/spi/spi_flash.c > +++ b/drivers/mtd/spi/spi_flash.c > @@ -264,6 +264,21 @@ int spi_flash_cmd_write_status(struct spi_flash *flash, u8 sr) > return 0; > } > > +int spi_flash_cmd_read_status(struct spi_flash *flash, void *data) > +{ > + u8 cmd; > + int ret; > + > + cmd = CMD_READ_STATUS; > + ret = spi_flash_read_common(flash, &cmd, sizeof(cmd), (void *)data, 1); > + if (ret < 0) { > + debug("SF: fail to read status register\n"); > + return ret; > + } > + > + return 0; > +} > + > /* > * The following table holds all device probe functions > * > diff --git a/drivers/mtd/spi/spi_flash_internal.h b/drivers/mtd/spi/spi_flash_internal.h > index 141cfa8..8232595 100644 > --- a/drivers/mtd/spi/spi_flash_internal.h > +++ b/drivers/mtd/spi/spi_flash_internal.h > @@ -77,6 +77,9 @@ static inline int spi_flash_cmd_write_disable(struct spi_flash *flash) > /* Program the status register. */ > int spi_flash_cmd_write_status(struct spi_flash *flash, u8 sr); > > +/* Read the status register */ > +int spi_flash_cmd_read_status(struct spi_flash *flash, void *data); > + > /* > * Same as spi_flash_cmd_read() except it also claims/releases the SPI > * bus. Used as common part of the ->read() operation. > -- > 1.7.0.4 >
diff --git a/drivers/mtd/spi/spi_flash.c b/drivers/mtd/spi/spi_flash.c index 9e8939c..bf5ec4a 100644 --- a/drivers/mtd/spi/spi_flash.c +++ b/drivers/mtd/spi/spi_flash.c @@ -264,6 +264,21 @@ int spi_flash_cmd_write_status(struct spi_flash *flash, u8 sr) return 0; } +int spi_flash_cmd_read_status(struct spi_flash *flash, void *data) +{ + u8 cmd; + int ret; + + cmd = CMD_READ_STATUS; + ret = spi_flash_read_common(flash, &cmd, sizeof(cmd), (void *)data, 1); + if (ret < 0) { + debug("SF: fail to read status register\n"); + return ret; + } + + return 0; +} + /* * The following table holds all device probe functions * diff --git a/drivers/mtd/spi/spi_flash_internal.h b/drivers/mtd/spi/spi_flash_internal.h index 141cfa8..8232595 100644 --- a/drivers/mtd/spi/spi_flash_internal.h +++ b/drivers/mtd/spi/spi_flash_internal.h @@ -77,6 +77,9 @@ static inline int spi_flash_cmd_write_disable(struct spi_flash *flash) /* Program the status register. */ int spi_flash_cmd_write_status(struct spi_flash *flash, u8 sr); +/* Read the status register */ +int spi_flash_cmd_read_status(struct spi_flash *flash, void *data); + /* * Same as spi_flash_cmd_read() except it also claims/releases the SPI * bus. Used as common part of the ->read() operation.
This patch provides support to read a flash status register. Status register contains a control bits used to verify the progress of flash program and erase operations. User need to get the data through spi_flash_cmd_read_status() based on their usage. Signed-off-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com> --- Changes in v2:none drivers/mtd/spi/spi_flash.c | 15 +++++++++++++++ drivers/mtd/spi/spi_flash_internal.h | 3 +++ 2 files changed, 18 insertions(+), 0 deletions(-)