mfd: tps65217: Set PMIC to shutdown on PWR_EN toggle

Set tps65217 PMIC status to OFF if power enable toggle is supported.
By setting this bit to 1 to enter PMIC to OFF state when PWR_EN pin
is pulled low. Also adds a DT flag to specify that device pmic
supports shutdown control or not.

Signed-off-by: Colin Foe-Parker <colin.foeparker@logicpd.com>
[anilkumar@ti.com: move the additions to tps65217 MFD driver]
Signed-off-by: AnilKumar Ch <anilkumar@ti.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

2 files changed, 16 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/regulator/tps65217.txt b/Documentation/devicetree/bindings/regulator/tps65217.txt
index d316fb895daf..4f05d208c95c 100644
--- a/Documentation/devicetree/bindings/regulator/tps65217.txt
+++ b/Documentation/devicetree/bindings/regulator/tps65217.txt
@@ -11,6 +11,9 @@ Required properties:
   using the standard binding for regulators found at
   Documentation/devicetree/bindings/regulator/regulator.txt.
 
+Optional properties:
+- ti,pmic-shutdown-controller: Telling the PMIC to shutdown on PWR_EN toggle.
+
   The valid names for regulators are:
   tps65217: dcdc1, dcdc2, dcdc3, ldo1, ldo2, ldo3 and ldo4
 
@@ -20,6 +23,7 @@ Example:
 
         tps: tps@24 {
                 compatible = "ti,tps65217";
+                ti,pmic-shutdown-controller;
 
                 regulators {
                         dcdc1_reg: dcdc1 {
diff --git a/drivers/mfd/tps65217.c b/drivers/mfd/tps65217.c
index 3fb32e655254..c7f17d86db78 100644
--- a/drivers/mfd/tps65217.c
+++ b/drivers/mfd/tps65217.c
@@ -160,6 +160,7 @@ static int __devinit tps65217_probe(struct i2c_client *client,
         unsigned int version;
         unsigned int chip_id = ids->driver_data;
         const struct of_device_id *match;
+        bool status_off = false;
         int ret;
 
         if (client->dev.of_node) {
@@ -170,6 +171,8 @@ static int __devinit tps65217_probe(struct i2c_client *client,
                         return -EINVAL;
                 }
                 chip_id = (unsigned int)match->data;
+                status_off = of_property_read_bool(client->dev.of_node,
+                                        "ti,pmic-shutdown-controller");
         }
 
         if (!chip_id) {
@@ -207,6 +210,15 @@ static int __devinit tps65217_probe(struct i2c_client *client,
                 return ret;
         }
 
+        /* Set the PMIC to shutdown on PWR_EN toggle */
+        if (status_off) {
+                ret = tps65217_set_bits(tps, TPS65217_REG_STATUS,
+                                TPS65217_STATUS_OFF, TPS65217_STATUS_OFF,
+                                TPS65217_PROTECT_NONE);
+                if (ret)
+                        dev_warn(tps->dev, "unable to set the status OFF\n");
+        }
+
         dev_info(tps->dev, "TPS65217 ID %#x version 1.%d\n",
                         (version & TPS65217_CHIPID_CHIP_MASK) >> 4,
                         version & TPS65217_CHIPID_REV_MASK);