mtd: st_spi_fsm: Add support for Macronix MX25L3255E

This patch adds support for the Macronix MX25L3255E device.  Unlike the other
Macronix devices we have seen, this device supports WRITE_1_4_4 at reasonable
frequencies.  Rather than masking out WRITE_1_4_4 support altogether, we now
rely on the table parameters to indicate whether or not WRITE_1_4_4 should be
used.

Signed-off-by: Angus Clark <angus.clark@st.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>

diff --git a/drivers/mtd/devices/st_spi_fsm.c b/drivers/mtd/devices/st_spi_fsm.c
index a3d7334..30082a0 100644 (file)
--- a/drivers/mtd/devices/st_spi_fsm.c
+++ b/drivers/mtd/devices/st_spi_fsm.c
@@ -372,14 +372,20 @@ static struct flash_info flash_types[] = {
        { "m25px32", 0x207116, 0,  64 * 1024,  64, M25PX_FLAG, 75, NULL },
        { "m25px64", 0x207117, 0,  64 * 1024, 128, M25PX_FLAG, 75, NULL },
 
+       /* Macronix MX25xxx
+        *     - Support for 'FLASH_FLAG_WRITE_1_4_4' is omitted for devices
+        *       where operating frequency must be reduced.
+        */
 #define MX25_FLAG (FLASH_FLAG_READ_WRITE       |       \
                   FLASH_FLAG_READ_FAST         |       \
                   FLASH_FLAG_READ_1_1_2        |       \
                   FLASH_FLAG_READ_1_2_2        |       \
                   FLASH_FLAG_READ_1_1_4        |       \
-                  FLASH_FLAG_READ_1_4_4        |       \
                   FLASH_FLAG_SE_4K             |       \
                   FLASH_FLAG_SE_32K)
+       { "mx25l3255e",  0xc29e16, 0, 64 * 1024, 64,
+         (MX25_FLAG | FLASH_FLAG_WRITE_1_4_4), 86,
+         stfsm_mx25_config},
        { "mx25l25635e", 0xc22019, 0, 64*1024, 512,
          (MX25_FLAG | FLASH_FLAG_32BIT_ADDR | FLASH_FLAG_RESET), 70,
          stfsm_mx25_config },