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| author | Michael Walle <mwalle@kernel.org> | 2025-08-26 16:46:31 +0300 |
|---|---|---|
| committer | Lee Jones <lee@kernel.org> | 2025-09-03 13:28:36 +0300 |
| commit | 2215a87b02ad8d353cd3edebd1bed01db2458986 (patch) | |
| tree | 385040e1af68699e74f13ca1a67e48d3625395d8 | |
| parent | d766ca01c208bdf0f36098607efe1e250ccf41c5 (diff) | |
| download | linux-2215a87b02ad8d353cd3edebd1bed01db2458986.tar.xz | |
mfd: tps6594: Add board power-off support
Add a system level power-off handler if the "system-power-controller"
flag is set for this device in the device tree.
A power-off request is triggered by writing the TRIGGER_I2C_0 bit (which
is actually just a convention and really depends on the freely
programmable FSM).
Co-developed-by: Job Sava <jsava@criticallink.com>
Signed-off-by: Job Sava <jsava@criticallink.com>
Signed-off-by: Michael Walle <mwalle@kernel.org>
Link: https://lore.kernel.org/r/20250826134631.1499936-4-mwalle@kernel.org
Signed-off-by: Lee Jones <lee@kernel.org>
| -rw-r--r-- | drivers/mfd/tps6594-core.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/mfd/tps6594-core.c b/drivers/mfd/tps6594-core.c index 9195c9059489..7127af7142f5 100644 --- a/drivers/mfd/tps6594-core.c +++ b/drivers/mfd/tps6594-core.c @@ -15,6 +15,7 @@ #include <linux/interrupt.h> #include <linux/module.h> #include <linux/of.h> +#include <linux/reboot.h> #include <linux/mfd/core.h> #include <linux/mfd/tps6594.h> @@ -688,6 +689,19 @@ static int tps6594_enable_crc(struct tps6594 *tps) return ret; } +static int tps6594_power_off_handler(struct sys_off_data *data) +{ + struct tps6594 *tps = data->cb_data; + int ret; + + ret = regmap_update_bits(tps->regmap, TPS6594_REG_FSM_I2C_TRIGGERS, + TPS6594_BIT_TRIGGER_I2C(0), TPS6594_BIT_TRIGGER_I2C(0)); + if (ret) + return notifier_from_errno(ret); + + return NOTIFY_DONE; +} + int tps6594_device_init(struct tps6594 *tps, bool enable_crc) { struct device *dev = tps->dev; @@ -770,6 +784,12 @@ int tps6594_device_init(struct tps6594 *tps, bool enable_crc) return dev_err_probe(dev, ret, "Failed to add RTC child device\n"); } + if (of_device_is_system_power_controller(dev->of_node)) { + ret = devm_register_power_off_handler(tps->dev, tps6594_power_off_handler, tps); + if (ret) + return dev_err_probe(dev, ret, "Failed to register power-off handler\n"); + } + return 0; } EXPORT_SYMBOL_GPL(tps6594_device_init); |