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| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-10-19 13:19:07 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-10-19 13:19:07 -0700 |
| commit | 5584cfbafc1a4c2a465f4423d351bb918c64cad0 (patch) | |
| tree | f74dcc1ba5a6790cb3e69629696aff58bdfd827a /drivers/mtd/devices/m25p80.c | |
| parent | 1653d2f88f43f6780eace1faeeb7b7adde8c10fb (diff) | |
| parent | 31d141e3a666269a3b6fcccddb0351caf7454240 (diff) | |
| download | linux-5584cfbafc1a4c2a465f4423d351bb918c64cad0.tar.bz2 | |
Merge 3.12-rc6 into usb-next.
We want those USB fixes in here as well.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/mtd/devices/m25p80.c')
| -rw-r--r-- | drivers/mtd/devices/m25p80.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/drivers/mtd/devices/m25p80.c b/drivers/mtd/devices/m25p80.c index 26b14f9fcac6..6bc9618af094 100644 --- a/drivers/mtd/devices/m25p80.c +++ b/drivers/mtd/devices/m25p80.c @@ -168,12 +168,25 @@ static inline int write_disable(struct m25p *flash) */ static inline int set_4byte(struct m25p *flash, u32 jedec_id, int enable) { + int status; + bool need_wren = false; + switch (JEDEC_MFR(jedec_id)) { - case CFI_MFR_MACRONIX: case CFI_MFR_ST: /* Micron, actually */ + /* Some Micron need WREN command; all will accept it */ + need_wren = true; + case CFI_MFR_MACRONIX: case 0xEF /* winbond */: + if (need_wren) + write_enable(flash); + flash->command[0] = enable ? OPCODE_EN4B : OPCODE_EX4B; - return spi_write(flash->spi, flash->command, 1); + status = spi_write(flash->spi, flash->command, 1); + + if (need_wren) + write_disable(flash); + + return status; default: /* Spansion style */ flash->command[0] = OPCODE_BRWR; |