From: <Andrei.Stefanescu@microchip.com>
To: <broonie@kernel.org>, <lgirdwood@gmail.com>
Cc: <linux-arm-kernel@lists.infradead.org>,
<linux-kernel@vger.kernel.org>, <Cristian.Birsan@microchip.com>,
<Nicolas.Ferre@microchip.com>, <Andrei.Stefanescu@microchip.com>
Subject: [PATCH v2] regulator: mcp16502: add support for suspend
Date: Fri, 14 Dec 2018 08:09:31 +0000 [thread overview]
Message-ID: <1544774961-6951-1-git-send-email-andrei.stefanescu@microchip.com> (raw)
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.
Signed-off-by: Andrei Stefanescu <andrei.stefanescu@microchip.com>
---
drivers/regulator/mcp16502.c | 34 ++++++++++++++++++++++++++++++++++
1 file changed, 34 insertions(+)
diff --git a/drivers/regulator/mcp16502.c b/drivers/regulator/mcp16502.c
index 7cbc96f..25d7b43 100644
--- a/drivers/regulator/mcp16502.c
+++ b/drivers/regulator/mcp16502.c
@@ -497,6 +497,37 @@ static int mcp16502_probe(struct i2c_client *client,
return 0;
}
+#ifdef CONFIG_SUSPEND
+static int mcp16502_suspend_noirq(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_noirq(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_NOIRQ_SYSTEM_SLEEP_PM_OPS(mcp16502_suspend_noirq,
+ mcp16502_resume_noirq)
+};
+#endif
static const struct i2c_device_id mcp16502_i2c_id[] = {
{ "mcp16502", 0 },
{ }
@@ -508,6 +539,9 @@ 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
reply other threads:[~2018-12-14 8:09 UTC|newest]
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