From: Christophe Kerello <christophe.kere...@st.com>

This patch adds a mask to be able to get the right boot device selection.

For example:
    for STiH415, value = SYSTEM_STATUS398[4:0]
    for STiH416, value = SYSTEM_STATUS2598[4:0]
    for STiH407, value = SYSTEM_STATUS5561[6:2]

Signed-off-by: Christophe Kerello <christophe.kere...@st.com>
Signed-off-by: Lee Jones <lee.jo...@linaro.org>
---
 drivers/mtd/devices/st_spi_fsm.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/mtd/devices/st_spi_fsm.c b/drivers/mtd/devices/st_spi_fsm.c
index 3f74e125..6d535d9 100644
--- a/drivers/mtd/devices/st_spi_fsm.c
+++ b/drivers/mtd/devices/st_spi_fsm.c
@@ -2125,6 +2125,7 @@ static void stfsm_fetch_platform_configs(struct 
platform_device *pdev)
        struct regmap *regmap;
        uint32_t boot_device_reg;
        uint32_t boot_device_spi;
+       uint32_t boot_device_msk;
        uint32_t boot_device;     /* Value we read from *boot_device_reg */
        int ret;
 
@@ -2149,10 +2150,17 @@ static void stfsm_fetch_platform_configs(struct 
platform_device *pdev)
        if (ret)
                goto boot_device_fail;
 
+       /* Mask to apply on boot_device_reg */
+       ret = of_property_read_u32(np, "st,boot-device-msk", &boot_device_msk);
+       if (ret)
+               goto boot_device_fail;
+
        ret = regmap_read(regmap, boot_device_reg, &boot_device);
        if (ret)
                goto boot_device_fail;
 
+       boot_device &= boot_device_msk;
+
        if (boot_device != boot_device_spi)
                fsm->booted_from_spi = false;
 
-- 
1.8.3.2

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