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mfd: tps65217: Set PMIC to shutdown on PWR_EN toggle

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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>
This commit is contained in:
Colin Foe-Parker 2012-11-20 15:18:44 +05:30 committed by Samuel Ortiz
parent 433e075c7f
commit eb433dad48
2 changed files with 16 additions and 0 deletions
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4
Documentation/devicetree/bindings/regulator/tps65217.txt
View File

@ -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 {

12
drivers/mfd/tps65217.c
View File

@ -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);