This patch adds support for entering/resuming suspend states.
It does this by setting the LPM pin of the PMIC.
When suspending the PMIC will enter the Low-power mode
when the LPM pin will be set to high. If the suspend target state
is suspend-to-mem, the PMIC will transition to Hibernate mode,
otherwise, if it is standby, it will remain in Low-power mode.
This patch depends on
0b60c4deca1d regulator: mcp16502: add regulator driver for MCP16502
Signed-off-by: Andrei Stefanescu <andrei.stefanescu@xxxxxxxxxxxxx>
---
drivers/regulator/mcp16502.c | 33 +++++++++++++++++++++++++++++++++
1 file changed, 33 insertions(+)
diff --git a/drivers/regulator/mcp16502.c b/drivers/regulator/mcp16502.c
index 7cbc96f..bde3172 100644
--- a/drivers/regulator/mcp16502.c
+++ b/drivers/regulator/mcp16502.c
@@ -497,6 +497,36 @@ static int mcp16502_probe(struct i2c_client *client,
return 0;
}
+#ifdef CONFIG_SUSPEND
+static int mcp16502_suspend(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct mcp16502 *mcp = i2c_get_clientdata(client);
+
+ mcp16502_gpio_set_mode(mcp, MCP16502_OPMODE_LPM);
+
+ return 0;
+}
+
+static int mcp16502_resume(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct mcp16502 *mcp = i2c_get_clientdata(client);
+
+ mcp16502_gpio_set_mode(mcp, MCP16502_OPMODE_ACTIVE);
+
+ return 0;
+}
+#else /* !CONFIG_SUSPEND */
+#define mcp16502_suspend NULL
+#define mcp16502_resume NULL
+#endif /* !CONFIG_SUSPEND */
+
+#ifdef CONFIG_PM
+static const struct dev_pm_ops mcp16502_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(mcp16502_suspend, mcp16502_resume)
+};
+#endif
static const struct i2c_device_id mcp16502_i2c_id[] = {
{ "mcp16502", 0 },
{ }
@@ -508,6 +538,9 @@ static struct i2c_driver mcp16502_drv = {
.driver = {
.name = "mcp16502-regulator",
.of_match_table = of_match_ptr(mcp16502_ids),
+#ifdef CONFIG_PM
+ .pm = &mcp16502_pm_ops,
+#endif
},
.id_table = mcp16502_i2c_id,
};
--
2.7.4
