Messages in this thread Patch in this message | | | From | Charles Keepax <> | Subject | [PATCH RESEND 1/2] regulator: arizona-ldo1: Improve handling of regulator unbinding | Date | Wed, 22 Jan 2020 11:08:41 +0000 |
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The current unbinding process for Madera has some issues. The trouble is runtime PM is disabled as the first step of the process, but some of the drivers release IRQs causing regmap IRQ to issue a runtime get which fails. To allow runtime PM to remain enabled during mfd_remove_devices, the DCVDD regulator must remain available. In the case of external DCVDD's this is simple, the regulator can simply be disabled/put after the call to mfd_remove_devices. However, in the case of an internally supplied DCVDD the regulator needs to be released after all the MFD children, except for the regulator child itself, have been removed. This is achieved by having the regulator driver itself do the disable/put, as it is the last driver removed from the MFD.
Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com> --- drivers/regulator/arizona-ldo1.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-)
diff --git a/drivers/regulator/arizona-ldo1.c b/drivers/regulator/arizona-ldo1.c index 1a3d7b720f5e0..83dd37dbfe07b 100644 --- a/drivers/regulator/arizona-ldo1.c +++ b/drivers/regulator/arizona-ldo1.c @@ -375,6 +375,18 @@ static int madera_ldo1_probe(struct platform_device *pdev) return 0; } +static int madera_ldo1_remove(struct platform_device *pdev) +{ + struct madera *madera = dev_get_drvdata(pdev->dev.parent); + + if (madera->internal_dcvdd) { + regulator_disable(madera->dcvdd); + regulator_put(madera->dcvdd); + } + + return arizona_ldo1_remove(pdev); +} + static struct platform_driver arizona_ldo1_driver = { .probe = arizona_ldo1_probe, .remove = arizona_ldo1_remove, @@ -385,7 +397,7 @@ static struct platform_driver arizona_ldo1_driver = { static struct platform_driver madera_ldo1_driver = { .probe = madera_ldo1_probe, - .remove = arizona_ldo1_remove, + .remove = madera_ldo1_remove, .driver = { .name = "madera-ldo1", }, -- 2.11.0
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