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mfd: intel-lpss: Do not put device in reset state on suspend

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Commit 41a3da2b8e ("mfd: intel-lpss: Save register context on
suspend") saved the register context while going to suspend and
also put the device in reset state.

Due to the resetting of device, system cannot enter S3/S0ix
states when no_console_suspend flag is enabled. The system
and serial console both hang. The resetting of device is not
needed while going to suspend. Hence remove this code.

Cc: stable@vger.kernel.org
Fixes: 41a3da2b8e ("mfd: intel-lpss: Save register context on suspend")
Signed-off-by: Azhar Shaikh <azhar.shaikh@intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
Azhar Shaikh 2016-10-12 10:12:20 -07:00 committed by Lee Jones
parent 2c8c34167c
commit 274e43edcd
1 changed files with 0 additions and 3 deletions
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3
drivers/mfd/intel-lpss.c
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@ -502,9 +502,6 @@ int intel_lpss_suspend(struct device *dev)
for (i = 0; i < LPSS_PRIV_REG_COUNT; i++)
lpss->priv_ctx[i] = readl(lpss->priv + i * 4);
/* Put the device into reset state */
writel(0, lpss->priv + LPSS_PRIV_RESETS);
return 0;
}
EXPORT_SYMBOL_GPL(intel_lpss_suspend);