mtd: st_spi_fsm: Add support for Macronix MX25L3255E

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Gitweb:     http://git.infradead.org/?p=mtd-2.6.git;a=commit;h=6b6d37377c4c4c5cd1d9505afbc4e2d3113707f2
Commit:     6b6d37377c4c4c5cd1d9505afbc4e2d3113707f2
Parent:     85bdcf6b255e5197be6a6876d663256e9c164a78
Author:     Angus Clark <angus.clark at st.com>
AuthorDate: Wed Mar 26 16:39:20 2014 +0000
Committer:  Brian Norris <computersforpeace at gmail.com>
CommitDate: Mon Apr 14 11:23:00 2014 -0700

    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 at st.com>
    Signed-off-by: Lee Jones <lee.jones at linaro.org>
    Signed-off-by: Brian Norris <computersforpeace at gmail.com>
---
 drivers/mtd/devices/st_spi_fsm.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/mtd/devices/st_spi_fsm.c b/drivers/mtd/devices/st_spi_fsm.c
index a3d7334..30082a0 100644
--- 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 },