mtd: spear_smi: clear status register on init

It was observed that sometimes smi returned errors while resume from
suspend.

For safety reasons clear status register for any errors during init. In
absence of it smi can return failures during command transmissions.

Signed-off-by: Shiraz Hashim <shiraz.hashim@st.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

diff --git a/drivers/mtd/devices/spear_smi.c b/drivers/mtd/devices/spear_smi.c
index cffd36a916d02c24de500b60a336ac4f904da831..aec941e74e674480695934a8e067157c01e7b0aa 100644 (file)
--- a/drivers/mtd/devices/spear_smi.c
+++ b/drivers/mtd/devices/spear_smi.c
@@ -336,6 +336,9 @@ static void spear_smi_hw_init(struct spear_smi *dev)
        val = HOLD1 | BANK_EN | DSEL_TIME | (prescale << 8);
 
        mutex_lock(&dev->lock);
+       /* clear all interrupt conditions */
+       writel(0, dev->io_base + SMI_SR);
+
        writel(val, dev->io_base + SMI_CR1);
        mutex_unlock(&dev->lock);
 }