Messages in this thread Patch in this message |  | | | From | Mark Brown <> | | Subject | [PATCH 4/8] mfd: Disable more pulls on WM8994 | | Date | Mon, 28 Nov 2011 22:44:30 +0000 |
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Disable more pulls by default on WM8994 for a small current saving. Since some designs do leave SPKMODE floating provide platform data to allow that to be left enabled.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> --- drivers/mfd/wm8994-core.c | 11 ++++++++--- include/linux/mfd/wm8994/pdata.h | 6 ++++++ 2 files changed, 14 insertions(+), 3 deletions(-) diff --git a/drivers/mfd/wm8994-core.c b/drivers/mfd/wm8994-core.c index a6846b0..c8956f2 100644 --- a/drivers/mfd/wm8994-core.c +++ b/drivers/mfd/wm8994-core.c @@ -373,6 +373,7 @@ static int wm8994_device_init(struct wm8994 *wm8994, int irq) struct wm8994_pdata *pdata = wm8994->dev->platform_data; const char *devname; int ret, i; + int pulls = 0; dev_set_drvdata(wm8994->dev, wm8994); @@ -515,12 +516,16 @@ static int wm8994_device_init(struct wm8994 *wm8994, int irq) } wm8994->ldo_ena_always_driven = pdata->ldo_ena_always_driven; + + if (pdata->spkmode_pu) + pulls |= WM8994_SPKMODE_PU; } - /* Disable LDO pulldowns while the device is active */ + /* Disable unneeded pulls */ wm8994_set_bits(wm8994, WM8994_PULL_CONTROL_2, - WM8994_LDO1ENA_PD | WM8994_LDO2ENA_PD, - 0); + WM8994_LDO1ENA_PD | WM8994_LDO2ENA_PD | + WM8994_SPKMODE_PU | WM8994_CSNADDR_PD, + pulls); /* In some system designs where the regulators are not in use, * we can achieve a small reduction in leakage currents by diff --git a/include/linux/mfd/wm8994/pdata.h b/include/linux/mfd/wm8994/pdata.h index ea32f30..54e2fef 100644 --- a/include/linux/mfd/wm8994/pdata.h +++ b/include/linux/mfd/wm8994/pdata.h @@ -174,6 +174,12 @@ struct wm8994_pdata { * consumption will rise. */ bool ldo_ena_always_driven; + + /* + * SPKMODE must be pulled internally by the device on this + * system. + */ + bool spkmode_pu; }; #endif -- 1.7.7.3
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