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@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 2740ae195ef5e03ec7f5e5c0b5c979dc07bfd86c..5a1b470ce9087017eeaa678c7e062a8af5787a2e 100644 (file)
--- 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;