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Date: Mon, 21 Feb 2011 18:30:31 +0000 From: Mark Brown <broonie@...nsource.wolfsonmicro.com> To: Samuel Ortiz <sameo@...ux.intel.com> Cc: linux-kernel@...r.kernel.org, patches@...nsource.wolfsonmicro.com, Mark Brown <broonie@...nsource.wolfsonmicro.com> Subject: [PATCH] mfd: Put WM8994 into reset when suspending Ensure that the chip is in the lowest power mode possible when suspended by performing a soft reset on it. On early silicon revisions the lowest power modes can't be entered without using reset so we can't achieve equivalent results within the individual drivers. Signed-off-by: Mark Brown <broonie@...nsource.wolfsonmicro.com> --- drivers/mfd/wm8994-core.c | 5 +++++ 1 files changed, 5 insertions(+), 0 deletions(-) diff --git a/drivers/mfd/wm8994-core.c b/drivers/mfd/wm8994-core.c index f4016a0..e673bda2 100644 --- a/drivers/mfd/wm8994-core.c +++ b/drivers/mfd/wm8994-core.c @@ -271,6 +271,11 @@ static int wm8994_suspend(struct device *dev) if (ret < 0) dev_err(dev, "Failed to save LDO registers: %d\n", ret); + /* Explicitly put the device into reset in case regulators + * don't get disabled in order to ensure consistent restart. + */ + wm8994_reg_write(wm8994, WM8994_SOFTWARE_RESET, 0x8994); + wm8994->suspended = true; ret = regulator_bulk_disable(wm8994->num_supplies, -- 1.7.2.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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