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>

diff --git a/Documentation/devicetree/bindings/regulator/tps65217.txt b/Documentation/devicetree/bindings/regulator/tps65217.txt
index d316fb895daf415efc67c733522be99d7b5941fe..4f05d208c95cfeac7ebbc217003d34f08e0f4772 100644 (file)
--- 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 3fb32e655254789c5035f31b4284e30e2e4225ae..c7f17d86db78dac5a68601b9b132a7e3a6b09754 100644 (file)
--- 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);