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authorMark Brown <broonie@opensource.wolfsonmicro.com>2011-11-03 13:41:14 +0000
committerSamuel Ortiz <sameo@linux.intel.com>2012-01-09 00:37:29 +0100
commit289aabdaf943f3676a16908e2c3cc1a1f9877ccb (patch)
treeff558b16fa7cca647f58c795b2b2b7ca7d65bdd5 /drivers/mfd
parent73de16db43f8dcb833ab032ed274b60b23676680 (diff)
downloadop-kernel-dev-289aabdaf943f3676a16908e2c3cc1a1f9877ccb.zip
op-kernel-dev-289aabdaf943f3676a16908e2c3cc1a1f9877ccb.tar.gz
mfd: Disable more pulls on WM8994
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> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'drivers/mfd')
-rw-r--r--drivers/mfd/wm8994-core.c11
1 files changed, 8 insertions, 3 deletions
diff --git a/drivers/mfd/wm8994-core.c b/drivers/mfd/wm8994-core.c
index ff373dc..776298b 100644
--- a/drivers/mfd/wm8994-core.c
+++ b/drivers/mfd/wm8994-core.c
@@ -374,6 +374,7 @@ 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);
@@ -516,12 +517,16 @@ 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
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