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

commit 274e43edcda6f709aa67e436b3123e45a6270923 upstream.

Commit 41a3da2b8e163 ("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.

Fixes: 41a3da2b8e163 ("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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/mfd/intel-lpss.c b/drivers/mfd/intel-lpss.c
index 88e80ec772f6eebb0045cbea0a1ddff84eeb44fc..fe89e5e337d5461b51b2c9ba4fbb971bf858a52a 100644 (file)
--- a/drivers/mfd/intel-lpss.c
+++ b/drivers/mfd/intel-lpss.c
@@ -494,9 +494,6 @@ 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);