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Subject[PATCHv2] regulator: s2mps11: Added shutdown function to poweroff
Date
Added .shutdown function to s2mps11 to help poweroff the board successfully.

s2mps11-pmic: S2MPS11_REG_CTRL1 reg value 16:00000000000000000000000000010000

The device driver clears the register to turn off the PMIC.

Signed-off-by: Anand Moon <linux.amoon@gmail.com>

---
Console log for improper shutdown.
root@odroidxu3:~# poweroff
...
* Unmounting temporary filesystems... [ OK ]
* Deactivating swap... [ OK ]
* Unmounting local filesystems... [ OK ]
* Will now halt
[ 209.020280] reboot: Power down
[ 209.122039] Power down failed, please power off system manually.

Console log for proper shutdown.
root@odroidxu3:~# poweroff
...
* Unmounting temporary filesystems... [ OK ]
* Deactivating swap... [ OK ]
* Unmounting local filesystems... [ OK ]
* Will now halt
[ 476.283071] reboo
---
drivers/regulator/s2mps11.c | 26 ++++++++++++++++++++++++++
1 file changed, 26 insertions(+)

diff --git a/drivers/regulator/s2mps11.c b/drivers/regulator/s2mps11.c
index 326ffb5..823180e 100644
--- a/drivers/regulator/s2mps11.c
+++ b/drivers/regulator/s2mps11.c
@@ -1060,6 +1060,31 @@ out:
return ret;
}

+static void s2mps11_pmic_shutdown(struct platform_device *pdev)
+{
+ struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent);
+ unsigned int reg_val, ret;
+
+ ret = regmap_read(iodev->regmap_pmic, S2MPS11_REG_CTRL1, &reg_val);
+ if (ret < 0) {
+ dev_crit(&pdev->dev, "could not read S2MPS11_REG_CTRL1 value\n");
+ } else {
+ /*
+ * s2mps11-pmic: S2MPS11_REG_CTRL1 reg value
+ * is 00000000000000000000000000010000
+ * clear the S2MPS11_REG_CTRL1 0x10 value to shutdown.
+ */
+ if (reg_val & BIT(4)) {
+ ret = regmap_update_bits(iodev->regmap_pmic,
+ S2MPS11_REG_CTRL1,
+ BIT(4), BIT(0));
+ if (ret)
+ dev_crit(&pdev->dev,
+ "could not write S2MPS11_REG_CTRL1 value\n");
+ }
+ }
+}
+
static const struct platform_device_id s2mps11_pmic_id[] = {
{ "s2mps11-pmic", S2MPS11X},
{ "s2mps13-pmic", S2MPS13X},
@@ -1074,6 +1099,7 @@ static struct platform_driver s2mps11_pmic_driver = {
.name = "s2mps11-pmic",
},
.probe = s2mps11_pmic_probe,
+ .shutdown = s2mps11_pmic_shutdown,
.id_table = s2mps11_pmic_id,
};

--
2.4.5


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