[v2,2/2] mfd: wm8994: Fix unbalanced calls to regulator_bulk_disable()
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Message ID 20200226100802.16384-2-m.szyprowski@samsung.com
State In Next
Commit f4a1954036c1a256e89fb087eb39cb719336e7c4
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Series
  • [v2,1/2] mfd: wm8994: Fix driver operation if loaded as modules
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Commit Message

Marek Szyprowski Feb. 26, 2020, 10:08 a.m. UTC
When runtime PM is enabled, regulators are being controlled by the
driver's suspend and resume callbacks. They are also unconditionally
enabled at driver's probe(), and disabled in remove() functions. Add
more calls to runtime PM framework to ensure that the device's runtime
PM state matches the regulators state:
1. at the end of probe() function: set runtime PM state to active, so
there will be no spurious call to resume();
2. in remove(), ensure that resume() is called before disabling runtime PM
management and unconditionally disabling the regulators.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
---
 drivers/mfd/wm8994-core.c | 3 +++
 1 file changed, 3 insertions(+)

Comments

Charles Keepax Feb. 27, 2020, 1:56 p.m. UTC | #1
On Wed, Feb 26, 2020 at 11:08:02AM +0100, Marek Szyprowski wrote:
> When runtime PM is enabled, regulators are being controlled by the
> driver's suspend and resume callbacks. They are also unconditionally
> enabled at driver's probe(), and disabled in remove() functions. Add
> more calls to runtime PM framework to ensure that the device's runtime
> PM state matches the regulators state:
> 1. at the end of probe() function: set runtime PM state to active, so
> there will be no spurious call to resume();
> 2. in remove(), ensure that resume() is called before disabling runtime PM
> management and unconditionally disabling the regulators.
> 
> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
> ---

Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com>

Thanks,
Charles

Patch
diff mbox series

diff --git a/drivers/mfd/wm8994-core.c b/drivers/mfd/wm8994-core.c
index 737dede4a95c..69d973ec42bf 100644
--- a/drivers/mfd/wm8994-core.c
+++ b/drivers/mfd/wm8994-core.c
@@ -584,6 +584,7 @@  static int wm8994_device_init(struct wm8994 *wm8994, int irq)
 		goto err_irq;
 	}
 
+	pm_runtime_set_active(wm8994->dev);
 	pm_runtime_enable(wm8994->dev);
 	pm_runtime_idle(wm8994->dev);
 
@@ -603,7 +604,9 @@  static int wm8994_device_init(struct wm8994 *wm8994, int irq)
 
 static void wm8994_device_exit(struct wm8994 *wm8994)
 {
+	pm_runtime_get_sync(wm8994->dev);
 	pm_runtime_disable(wm8994->dev);
+	pm_runtime_put_noidle(wm8994->dev);
 	wm8994_irq_exit(wm8994);
 	regulator_bulk_disable(wm8994->num_supplies, wm8994->supplies);
 	regulator_bulk_free(wm8994->num_supplies, wm8994->supplies);