mfd: arizona: Don't use devres for DCVDD

Currently the Arizona core uses a devm_regulator_get against its own
device node to obtain DCVDD. The Arizona core is an MFD device and DCVDD
is usually supplied by a child node (arizona-ldo1) of the core. As
devres destruction for the MFD device will run after all its children
have been destroyed, the regulator will be destroyed before devres
calls regulator_put. This causes a warning from both the destruction of
the child node, as the regulator is still open, and from the put of the
regulator as the regulator device has already been destroyed.

This patch handles the regulator get and put without devres to avoid
this issue.

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

diff --git a/drivers/mfd/arizona-core.c b/drivers/mfd/arizona-core.c
index 9df02502326a468d868b9781c33389e019021d44..fee6a1ee3a0f3d508b7e92154bdeadef0f88efd5 100644 (file)
--- a/drivers/mfd/arizona-core.c
+++ b/drivers/mfd/arizona-core.c
@@ -683,7 +683,7 @@ int arizona_dev_init(struct arizona *arizona)
                goto err_early;
        }
 
-       arizona->dcvdd = devm_regulator_get(arizona->dev, "DCVDD");
+       arizona->dcvdd = regulator_get(arizona->dev, "DCVDD");
        if (IS_ERR(arizona->dcvdd)) {
                ret = PTR_ERR(arizona->dcvdd);
                dev_err(dev, "Failed to request DCVDD: %d\n", ret);
@@ -697,7 +697,7 @@ int arizona_dev_init(struct arizona *arizona)
                                       "arizona /RESET");
                if (ret != 0) {
                        dev_err(dev, "Failed to request /RESET: %d\n", ret);
-                       goto err_early;
+                       goto err_dcvdd;
                }
        }
 
@@ -706,7 +706,7 @@ int arizona_dev_init(struct arizona *arizona)
        if (ret != 0) {
                dev_err(dev, "Failed to enable core supplies: %d\n",
                        ret);
-               goto err_early;
+               goto err_dcvdd;
        }
 
        ret = regulator_enable(arizona->dcvdd);
@@ -1015,6 +1015,8 @@ err_reset:
 err_enable:
        regulator_bulk_disable(arizona->num_core_supplies,
                               arizona->core_supplies);
+err_dcvdd:
+       regulator_put(arizona->dcvdd);
 err_early:
        mfd_remove_devices(dev);
        return ret;
@@ -1026,6 +1028,7 @@ int arizona_dev_exit(struct arizona *arizona)
        pm_runtime_disable(arizona->dev);
 
        regulator_disable(arizona->dcvdd);
+       regulator_put(arizona->dcvdd);
 
        mfd_remove_devices(arizona->dev);
        arizona_free_irq(arizona, ARIZONA_IRQ_UNDERCLOCKED, arizona);