| From foo@baz Thu Mar 22 14:57:32 CET 2018 |
| From: Keerthy <j-keerthy@ti.com> |
| Date: Thu, 10 Nov 2016 10:39:18 +0530 |
| Subject: mfd: palmas: Reset the POWERHOLD mux during power off |
| |
| From: Keerthy <j-keerthy@ti.com> |
| |
| |
| [ Upstream commit 85fdaf8eb9bbec1f0f8a52fd5d85659d60738816 ] |
| |
| POWERHOLD signal has higher priority over the DEV_ON bit. |
| So power off will not happen if the POWERHOLD is held high. |
| Hence reset the MUX to GPIO_7 mode to release the POWERHOLD |
| and the DEV_ON bit to take effect to power off the PMIC. |
| |
| PMIC Power off happens in dire situations like thermal shutdown |
| so irrespective of the POWERHOLD setting go ahead and turn off |
| the powerhold. Currently poweroff is broken on boards that have |
| powerhold enabled. This fixes poweroff on those boards. |
| |
| Signed-off-by: Keerthy <j-keerthy@ti.com> |
| Signed-off-by: Lee Jones <lee.jones@linaro.org> |
| Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| --- |
| drivers/mfd/palmas.c | 14 ++++++++++++++ |
| 1 file changed, 14 insertions(+) |
| |
| --- a/drivers/mfd/palmas.c |
| +++ b/drivers/mfd/palmas.c |
| @@ -430,6 +430,20 @@ static void palmas_power_off(void) |
| { |
| unsigned int addr; |
| int ret, slave; |
| + struct device_node *np = palmas_dev->dev->of_node; |
| + |
| + if (of_property_read_bool(np, "ti,palmas-override-powerhold")) { |
| + addr = PALMAS_BASE_TO_REG(PALMAS_PU_PD_OD_BASE, |
| + PALMAS_PRIMARY_SECONDARY_PAD2); |
| + slave = PALMAS_BASE_TO_SLAVE(PALMAS_PU_PD_OD_BASE); |
| + |
| + ret = regmap_update_bits(palmas_dev->regmap[slave], addr, |
| + PALMAS_PRIMARY_SECONDARY_PAD2_GPIO_7_MASK, 0); |
| + if (ret) |
| + dev_err(palmas_dev->dev, |
| + "Unable to write PRIMARY_SECONDARY_PAD2 %d\n", |
| + ret); |
| + } |
| |
| if (!palmas_dev) |
| return; |
