If the system-power-controller property is there, enable power off.
Implementation is based on a Linux v3.0 vendor kernel.
Signed-off-by: Andreas Kemnade <andreas@xxxxxxxxxxxx>
---
drivers/mfd/twl-core.c | 34 ++++++++++++++++++++++++++++++++++
include/linux/mfd/twl.h | 1 +
2 files changed, 35 insertions(+)
diff --git a/drivers/mfd/twl-core.c b/drivers/mfd/twl-core.c
index 6e384a79e3418..3eef285eac535 100644
--- a/drivers/mfd/twl-core.c
+++ b/drivers/mfd/twl-core.c
@@ -687,6 +687,31 @@ static void twl_remove(struct i2c_client *client)
twl_priv->ready = false;
}
+void twl6030_power_off(void)
+{
+#define APP_DEVOFF (1<<0)
+#define CON_DEVOFF (1<<1)
+#define MOD_DEVOFF (1<<2)
+
+ int err;
+ u8 val;
+
+ err = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &val,
+ TWL6030_PHOENIX_DEV_ON);
+ if (err) {
+ pr_err("I2C error %d reading PHOENIX_DEV_ON\n", err);
+ return;
+ }
+
+ val |= APP_DEVOFF | CON_DEVOFF | MOD_DEVOFF;
+
+ err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, val,
+ TWL6030_PHOENIX_DEV_ON);
+ if (err)
+ pr_err("TWL6030 Unable to power off\n");
+}
+
+
static struct of_dev_auxdata twl_auxdata_lookup[] = {
OF_DEV_AUXDATA("ti,twl4030-gpio", 0, "twl4030-gpio", NULL),
{ /* sentinel */ },
@@ -852,6 +877,15 @@ twl_probe(struct i2c_client *client)
goto free;
}
+ if (twl_class_is_6030()) {
+ if (of_device_is_system_power_controller(client->dev.of_node)) {
+ if (!pm_power_off)
+ pm_power_off = twl6030_power_off;
+ else
+ dev_warn(&client->dev, "Poweroff callback already assigned\n");
+ }
+ }
+
status = of_platform_populate(node, NULL, twl_auxdata_lookup,
&client->dev);
diff --git a/include/linux/mfd/twl.h b/include/linux/mfd/twl.h
index c062d91a67d92..85dc406173dba 100644
--- a/include/linux/mfd/twl.h
+++ b/include/linux/mfd/twl.h
@@ -461,6 +461,7 @@ static inline int twl6030_mmc_card_detect(struct device *dev, int slot)
#define TWL4030_PM_MASTER_GLOBAL_TST 0xb6
+#define TWL6030_PHOENIX_DEV_ON 0x06
/*----------------------------------------------------------------------*/
/* Power bus message definitions */
--
2.39.2
