[PATCH 04/15 v3] regulator: lp8788-ldo: Let core handle GPIO descriptor

From: Linus Walleij <linus.walleij@linaro.org>
To: Liam Girdwood <lgirdwood@gmail.com>, Mark Brown <broonie@kernel.org>
Cc: linux-kernel@vger.kernel.org,
	Charles Keepax <ckeepax@opensource.cirrus.com>,
	Bartosz Golaszewski <bgolaszewski@baylibre.com>,
	Marek Szyprowski <m.szyprowski@samsung.com>,
	Linus Walleij <linus.walleij@linaro.org>
Subject: [PATCH 04/15 v3] regulator: lp8788-ldo: Let core handle GPIO descriptor
Date: Wed,  5 Dec 2018 13:47:10 +0100	[thread overview]
Message-ID: <20181205124721.26624-5-linus.walleij@linaro.org> (raw)
In-Reply-To: <20181205124721.26624-1-linus.walleij@linaro.org>

Use the gpiod_get() rather than the devm_* version so that the
regulator core can handle the lifecycle of these descriptors.

Fixes: 2468f0d51548 ("regulator: lp8788-ldo: Pass descriptor instead of GPIO number")
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
ChangeLog v2->v3:
- Resending.
ChangeLog v1->v2:
- Drop the gpiod_put() on the errorpath after devm_regulator_register()
  as this will be handled by the regulator core.
- Put a comment in the code so maintainers knows not to
  use managed resources (devm*)
---
 drivers/regulator/lp8788-ldo.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/regulator/lp8788-ldo.c b/drivers/regulator/lp8788-ldo.c
index 553b4790050f..2ee22e7ea675 100644
--- a/drivers/regulator/lp8788-ldo.c
+++ b/drivers/regulator/lp8788-ldo.c
@@ -501,8 +501,12 @@ static int lp8788_config_ldo_enable_mode(struct platform_device *pdev,
 		return 0;
 	}
 
-	/* FIXME: check default mode for GPIO here: high or low? */
-	ldo->ena_gpiod = devm_gpiod_get_index_optional(&pdev->dev,
+	/*
+	 * Do not use devm* here: the regulator core takes over the
+	 * lifecycle management of the GPIO descriptor.
+	 * FIXME: check default mode for GPIO here: high or low?
+	 */
+	ldo->ena_gpiod = gpiod_get_index_optional(&pdev->dev,
 					       "enable",
 					       enable_id,
 					       GPIOD_OUT_HIGH |
-- 
2.19.2

