mtd: st_spi_fsm: Use device size to determine address width

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Gitweb:     http://git.infradead.org/?p=mtd-2.6.git;a=commit;h=3b5d1981933b25973b02684dccb17d4282fd4d6d
Commit:     3b5d1981933b25973b02684dccb17d4282fd4d6d
Parent:     089812740d42104d7b9eef803a34a3940d03bcd4
Author:     Lee Jones <lee.jones at linaro.org>
AuthorDate: Thu Mar 20 09:20:43 2014 +0000
Committer:  Brian Norris <computersforpeace at gmail.com>
CommitDate: Thu Mar 20 04:17:16 2014 -0700

    mtd: st_spi_fsm: Use device size to determine address width
    
    Take some known parameters, namely size and number of sectors and use
    them to determine weather a device can support 32bit addressing or not.
    If it can, set the associated flash capability flag for latter use.
    
    Acked-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 | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/mtd/devices/st_spi_fsm.c b/drivers/mtd/devices/st_spi_fsm.c
index 2740ae1..5a1b470 100644
--- a/drivers/mtd/devices/st_spi_fsm.c
+++ b/drivers/mtd/devices/st_spi_fsm.c
@@ -671,6 +671,10 @@ static int stfsm_probe(struct platform_device *pdev)
 		return -ENODEV;
 	fsm->info = info;
 
+	/* Use device size to determine address width */
+	if (info->sector_size * info->n_sectors > 0x1000000)
+		info->flags |= FLASH_FLAG_32BIT_ADDR;
+
 	fsm->mtd.dev.parent	= &pdev->dev;
 	fsm->mtd.type		= MTD_NORFLASH;
 	fsm->mtd.writesize	= 4;