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| author | Jagannadha Sutradharudu Teki <jaganna@xilinx.com> | 2013-06-21 15:56:30 +0530 |
|---|---|---|
| committer | Jagannadha Sutradharudu Teki <jaganna@xilinx.com> | 2013-06-23 22:02:51 +0530 |
| commit | 615a1561673a9a1b863f905d40f084f36edb9022 (patch) | |
| tree | 76c2bd6819b12b69877c25ef8aaa34f26dba0f30 /drivers/mtd/spi/stmicro.c | |
| parent | ba549de6c53663e534a20741f9ec917fb6526830 (diff) | |
| download | u-boot-imx-615a1561673a9a1b863f905d40f084f36edb9022.zip u-boot-imx-615a1561673a9a1b863f905d40f084f36edb9022.tar.gz u-boot-imx-615a1561673a9a1b863f905d40f084f36edb9022.tar.bz2 | |
sf: Add flag status register polling support
Flag status register polling is required for micron 512Mb flash
devices onwards, for performing erase/program operations.
Like polling for WIP(Write-In-Progress) bit in read status register,
spi_flash_cmd_wait_ready will poll for PEC(Program-Erase-Control)
bit in flag status register.
Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'drivers/mtd/spi/stmicro.c')
| -rw-r--r-- | drivers/mtd/spi/stmicro.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/mtd/spi/stmicro.c b/drivers/mtd/spi/stmicro.c index ef4b911..7e41ee1 100644 --- a/drivers/mtd/spi/stmicro.c +++ b/drivers/mtd/spi/stmicro.c @@ -210,5 +210,9 @@ struct spi_flash *spi_flash_probe_stmicro(struct spi_slave *spi, u8 * idcode) flash->sector_size = 256 * params->pages_per_sector; flash->size = flash->sector_size * params->nr_sectors; + /* for >= 512MiB flashes, use flag status instead of read_status */ + if (flash->size >= 0x4000000) + flash->poll_cmd = CMD_FLAG_STATUS; + return flash; } |