mfd: Add device-tree entry to enable tps65910 external 32-kHz oscillator

Add device-tree entry to enable external 32-kHz crystal oscillator
input.

Compile-only tested.

Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

2 files changed, 6 insertions, 1 deletions

diff --git a/Documentation/devicetree/bindings/mfd/tps65910.txt b/Documentation/devicetree/bindings/mfd/tps65910.txt
index 645f5eaadb3f..0f5d9b74f4b9 100644
--- a/Documentation/devicetree/bindings/mfd/tps65910.txt
+++ b/Documentation/devicetree/bindings/mfd/tps65910.txt
@@ -29,6 +29,8 @@ Optional properties:
   comparator. (see VMBCH_VSEL in TPS65910 datasheet)
 - ti,vmbch2-threshold: (tps65911) main battery discharged threshold
   comparator. (see VMBCH_VSEL in TPS65910 datasheet)
+- ti,en-ck32k-xtal: enable external 32-kHz crystal oscillator (see CK32K_CTRL
+  in TPS6591X datasheet)
 - ti,en-gpio-sleep: enable sleep control for gpios
   There should be 9 entries here, one for each gpio.
 
@@ -53,7 +55,7 @@ Example:
 
                 ti,vmbch-threshold = 0;
                 ti,vmbch2-threshold = 0;
-
+                ti,en-ck32k-xtal;
                 ti,en-gpio-sleep = <0 0 1 0 0 0 0 0 0>;
 
                 regulators {
diff --git a/drivers/mfd/tps65910.c b/drivers/mfd/tps65910.c
index b0526b7d6550..3f27ea1f1ba6 100644
--- a/drivers/mfd/tps65910.c
+++ b/drivers/mfd/tps65910.c
@@ -194,6 +194,9 @@ static struct tps65910_board *tps65910_parse_dt(struct i2c_client *client,
         else if (*chip_id == TPS65911)
                 dev_warn(&client->dev, "VMBCH2-Threshold not specified");
 
+        prop = of_property_read_bool(np, "ti,en-ck32k-xtal");
+        board_info->en_ck32k_xtal = prop;
+
         board_info->irq = client->irq;
         board_info->irq_base = -1;