From: Mark Brown <broonie@opensource.wolfsonmicro.com>
Date: Thu, 3 Nov 2011 13:20:38 +0000 (+0000)
Subject: mfd: Disable more pulls on WM8994
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=26c34c25e54b4a352596d88c6e44a239dab8e1c5;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git
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>
Acked-by: Samuel Ortiz <sameo@linux.intel.com>
---
diff --git a/drivers/mfd/wm8994-core.c b/drivers/mfd/wm8994-core.c
index a6846b04e156..c8956f2cd280 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 ea32f306dca6..54e2fef587d5 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