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mtd: spear_smi: clear status register on init

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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>
This commit is contained in:
Shiraz Hashim 2012-07-02 11:28:46 +05:30 committed by David Woodhouse
parent 770daa4337
commit 4dc48c37d1
1 changed files with 3 additions and 0 deletions
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3
drivers/mtd/devices/spear_smi.c
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@ -336,6 +336,9 @@ static void spear_smi_hw_init(struct spear_smi *dev)
val = HOLD1 | BANK_EN | DSEL_TIME | (prescale << 8); val = HOLD1 | BANK_EN | DSEL_TIME | (prescale << 8);
mutex_lock(&dev->lock); mutex_lock(&dev->lock);
/* clear all interrupt conditions */
writel(0, dev->io_base + SMI_SR);
writel(val, dev->io_base + SMI_CR1); writel(val, dev->io_base + SMI_CR1);
mutex_unlock(&dev->lock); mutex_unlock(&dev->lock);
} }