[PATCH 2/4] mfd: palmas: Reset the POWERHOLD mux during power off
From: Keerthy <j-keerthy@ti.com>
Date: 2016-10-27 09:10:12
Subsystem:
multifunction devices (mfd), omap2+ support, the rest · Maintainers:
Lee Jones, Aaro Koskinen, Andreas Kemnade, Kevin Hilman, Roger Quadros, Tony Lindgren, Linus Torvalds
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> --- drivers/mfd/palmas.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+)
diff --git a/drivers/mfd/palmas.c b/drivers/mfd/palmas.c
index 8f8bacb..8fbc5e0 100644
--- a/drivers/mfd/palmas.c
+++ b/drivers/mfd/palmas.c@@ -430,10 +430,28 @@ static void palmas_power_off(void) { unsigned int addr; int ret, slave; + struct device_node *node; + bool override_powerhold; if (!palmas_dev) return; + node = palmas_dev->dev->of_node; + override_powerhold = of_property_read_bool(node, + "ti,palmas-override-powerhold"); + + if (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) + pr_err("%s: Unable to write PALMAS_PRIMARY_SECONDARY_PAD2 %d\n", + __func__, ret); + } + slave = PALMAS_BASE_TO_SLAVE(PALMAS_PMU_CONTROL_BASE); addr = PALMAS_BASE_TO_REG(PALMAS_PMU_CONTROL_BASE, PALMAS_DEV_CTRL);
--
1.9.1