mfd: arizona: Wait for internal clocks to startup after reset

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 5 insertions, 1 deletions

diff --git a/drivers/mfd/arizona-core.c b/drivers/mfd/arizona-core.c
index ae10af798843..41856b4c0d17 100644
--- a/drivers/mfd/arizona-core.c
+++ b/drivers/mfd/arizona-core.c
@@ -529,8 +529,10 @@ int arizona_dev_init(struct arizona *arizona)
                 goto err_enable;
         }
 
-        if (arizona->pdata.reset)
+        if (arizona->pdata.reset) {
                 gpio_set_value_cansleep(arizona->pdata.reset, 1);
+                msleep(1);
+        }
 
         regcache_cache_only(arizona->regmap, false);
 
@@ -589,6 +591,8 @@ int arizona_dev_init(struct arizona *arizona)
                         goto err_reset;
                 }
 
+                msleep(1);
+
                 ret = regcache_sync(arizona->regmap);
                 if (ret != 0) {
                         dev_err(dev, "Failed to sync device: %d\n", ret);