diff options
| author | Andrei.Stefanescu@microchip.com <Andrei.Stefanescu@microchip.com> | 2018-12-14 11:09:31 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2018-12-14 14:39:58 +0300 |
| commit | fc401cb98a736fa010aeaf863618a904ca70ba2c (patch) | |
| tree | f627b663703e11986d0313265bf006995e767430 /drivers/regulator | |
| parent | 82b4d99725aedc3de731faa4e23f256fbe2821cf (diff) | |
| download | linux-fc401cb98a736fa010aeaf863618a904ca70ba2c.tar.xz | |
regulator: mcp16502: add support for suspend
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>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/regulator')
| -rw-r--r-- | drivers/regulator/mcp16502.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/drivers/regulator/mcp16502.c b/drivers/regulator/mcp16502.c index 7cbc96f7afcf..25d7b433fafd 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, }; |