From: Alberto Panizzo <alberto@xxxxxxxxxxxxxxxxxxxx>
For designs where CS/ADDR pin is floating, it is useful to
allow dts to define whether to keep internal pull down or not.
Signed-off-by: Alberto Panizzo <alberto@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Anthony Brandon <anthony@xxxxxxxxxxxxxxxxxxxx>
---
drivers/mfd/wm8994-core.c | 4 ++++
include/linux/mfd/wm8994/pdata.h | 6 ++++++
2 files changed, 10 insertions(+)
diff --git a/drivers/mfd/wm8994-core.c b/drivers/mfd/wm8994-core.c
index fa4b1b7..22bd652 100644
--- a/drivers/mfd/wm8994-core.c
+++ b/drivers/mfd/wm8994-core.c
@@ -304,6 +304,8 @@ static int wm8994_set_pdata_from_of(struct wm8994 *wm8994)
pdata->spkmode_pu = of_property_read_bool(np, "wlf,spkmode-pu");
+ pdata->csnaddr_pd = of_property_read_bool(np, "wlf,csnaddr-pd");
+
pdata->ldo[0].enable = of_get_named_gpio(np, "wlf,ldo1ena", 0);
if (pdata->ldo[0].enable < 0)
pdata->ldo[0].enable = 0;
@@ -562,6 +564,8 @@ static int wm8994_device_init(struct wm8994 *wm8994, int irq)
if (pdata->spkmode_pu)
pulls |= WM8994_SPKMODE_PU;
+ if (pdata->csnaddr_pd)
+ pulls |= WM8994_CSNADDR_PD;
/* Disable unneeded pulls */
wm8994_set_bits(wm8994, WM8994_PULL_CONTROL_2,
diff --git a/include/linux/mfd/wm8994/pdata.h b/include/linux/mfd/wm8994/pdata.h
index 90c6052..b19c370 100644
--- a/include/linux/mfd/wm8994/pdata.h
+++ b/include/linux/mfd/wm8994/pdata.h
@@ -222,6 +222,12 @@ struct wm8994_pdata {
*/
bool spkmode_pu;
+ /*
+ * CS/ADDR must be pulled internally by the device on this
+ * system.
+ */
+ bool csnaddr_pd;
+
/**
* Maximum number of channels clocks will be generated for,
* useful for systems where and I2S bus with multiple data
--
2.7.4
--
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