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Date: Thu, 13 Dec 2018 12:50:02 +0000 From: <Claudiu.Beznea@...rochip.com> To: <lgirdwood@...il.com>, <broonie@...nel.org>, <robh+dt@...nel.org>, <mark.rutland@....com>, <Nicolas.Ferre@...rochip.com>, <alexandre.belloni@...tlin.com>, <Ludovic.Desroches@...rochip.com> CC: <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>, <Claudiu.Beznea@...rochip.com> Subject: [PATCH v4 5/6] regulator: act8945a-regulator: add shutdown function From: Claudiu Beznea <claudiu.beznea@...rochip.com> Implement shutdown method to make sure the PMIC will not enter the suspend state when the system is shutdown. This work is based on work done by Borris Brezillon on [1]. [1] https://www.spinics.net/lists/kernel/msg2942960.html Signed-off-by: Claudiu Beznea <claudiu.beznea@...rochip.com> --- drivers/regulator/act8945a-regulator.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/regulator/act8945a-regulator.c b/drivers/regulator/act8945a-regulator.c index f4d60743efb3..90572b6370c6 100644 --- a/drivers/regulator/act8945a-regulator.c +++ b/drivers/regulator/act8945a-regulator.c @@ -339,12 +339,23 @@ static int act8945a_suspend(struct device *pdev) SIMPLE_DEV_PM_OPS(act8945a_pm, act8945a_suspend, NULL); +static void act8945a_pmic_shutdown(struct platform_device *pdev) +{ + struct act8945a_pmic *act8945a = platform_get_drvdata(pdev); + + /* + * Ask the PMIC to shutdown everything on the next PWRHLD transition. + */ + regmap_write(act8945a->regmap, ACT8945A_SYS_CTRL, 0x0); +} + static struct platform_driver act8945a_pmic_driver = { .driver = { .name = "act8945a-regulator", .pm = &act8945a_pm, }, .probe = act8945a_pmic_probe, + .shutdown = act8945a_pmic_shutdown, }; module_platform_driver(act8945a_pmic_driver); -- 2.7.4
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