| Message ID | 20240906093630.2428329-3-bigfoot@classfun.cn (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | Introduce Photonicat power management MCU driver | expand |
On 06/09/2024 11:36, Junhao Xie wrote: > This driver implements the shutdown function of Photonicat PMU: > > - Host notifies PMU to shutdown: > When powering off, a shutdown command (0x0F) needs to be sent > to the MCU. > > - PMU notifies host to shutdown: > If the power button is long pressed, the MCU will send a shutdown > command (0x0D) to the system. > If system does not shutdown within 60 seconds, > the power will be turned off directly. > > Signed-off-by: Junhao Xie <bigfoot@classfun.cn> > --- > drivers/power/reset/Kconfig | 12 +++ > drivers/power/reset/Makefile | 1 + > drivers/power/reset/photonicat-poweroff.c | 95 +++++++++++++++++++++++ > 3 files changed, 108 insertions(+) > create mode 100644 drivers/power/reset/photonicat-poweroff.c > > diff --git a/drivers/power/reset/Kconfig b/drivers/power/reset/Kconfig > index fece990af4a7..c59529ce25a2 100644 > --- a/drivers/power/reset/Kconfig > +++ b/drivers/power/reset/Kconfig > @@ -148,6 +148,18 @@ config POWER_RESET_ODROID_GO_ULTRA_POWEROFF > help > This driver supports Power off for Odroid Go Ultra device. > > +config POWER_RESET_PHOTONICAT_POWEROFF > + tristate "Photonicat PMU power-off driver" > + depends on MFD_PHOTONICAT_PMU || COMPILE_TEST, no? > + help > + This driver supports Power off for Photonicat PMU device. > + > + Supports operations: > + Host notifies PMU to shutdown > + PMU notifies host to shutdown > + > + Say Y if you have a Photonicat board. > + > config POWER_RESET_PIIX4_POWEROFF > tristate "Intel PIIX4 power-off driver" > depends on PCI > diff --git a/drivers/power/reset/Makefile b/drivers/power/reset/Makefile > index a95d1bd275d1..339b36812b95 100644 > --- a/drivers/power/reset/Makefile > +++ b/drivers/power/reset/Makefile > @@ -17,6 +17,7 @@ obj-$(CONFIG_POWER_RESET_MT6323) += mt6323-poweroff.o > obj-$(CONFIG_POWER_RESET_QCOM_PON) += qcom-pon.o > obj-$(CONFIG_POWER_RESET_OCELOT_RESET) += ocelot-reset.o > obj-$(CONFIG_POWER_RESET_ODROID_GO_ULTRA_POWEROFF) += odroid-go-ultra-poweroff.o > +obj-$(CONFIG_POWER_RESET_PHOTONICAT_POWEROFF) += photonicat-poweroff.o > obj-$(CONFIG_POWER_RESET_PIIX4_POWEROFF) += piix4-poweroff.o > obj-$(CONFIG_POWER_RESET_LTC2952) += ltc2952-poweroff.o > obj-$(CONFIG_POWER_RESET_QNAP) += qnap-poweroff.o > diff --git a/drivers/power/reset/photonicat-poweroff.c b/drivers/power/reset/photonicat-poweroff.c > new file mode 100644 > index 000000000000..f9f1ea179247 > --- /dev/null > +++ b/drivers/power/reset/photonicat-poweroff.c > @@ -0,0 +1,95 @@ > +// SPDX-License-Identifier: GPL-2.0-only > +/* > + * Copyright (c) 2024 Junhao Xie <bigfoot@classfun.cn> > + */ > + > +#include <linux/mfd/photonicat-pmu.h> > +#include <linux/module.h> > +#include <linux/of.h> > +#include <linux/platform_device.h> > +#include <linux/reboot.h> > + > +struct pcat_poweroff { > + struct device *dev; > + struct pcat_pmu *pmu; > + struct notifier_block nb; > +}; > + > +static int pcat_do_poweroff(struct sys_off_data *data) > +{ > + struct pcat_poweroff *poweroff = data->cb_data; > + > + dev_info(poweroff->dev, "Host request PMU shutdown\n"); > + pcat_pmu_write_data(poweroff->pmu, PCAT_CMD_HOST_REQUEST_SHUTDOWN, > + NULL, 0); > + > + return NOTIFY_DONE; > +} > + > +static int pcat_poweroff_notify(struct notifier_block *nb, unsigned long action, > + void *data) > +{ > + struct pcat_poweroff *poweroff = > + container_of(nb, struct pcat_poweroff, nb); > + > + if (action != PCAT_CMD_PMU_REQUEST_SHUTDOWN) > + return NOTIFY_DONE; > + > + dev_info(poweroff->dev, "PMU request host shutdown\n"); Nope. Drop. > + orderly_poweroff(true); > + > + return NOTIFY_DONE; Best regards, Krzysztof
On 2024/9/6 17:44, Krzysztof Kozlowski wrote: > On 06/09/2024 11:36, Junhao Xie wrote: >> This driver implements the shutdown function of Photonicat PMU: >> [...] >> >> +config POWER_RESET_PHOTONICAT_POWEROFF >> + tristate "Photonicat PMU power-off driver" >> + depends on MFD_PHOTONICAT_PMU > > || COMPILE_TEST, no? I will add it depends on MFD_PHOTONICAT_PMU || COMPILE_TEST > >> + help >> + This driver supports Power off for Photonicat PMU device. [...] >> + >> +static int pcat_poweroff_notify(struct notifier_block *nb, unsigned long action, >> + void *data) >> +{ >> + struct pcat_poweroff *poweroff = >> + container_of(nb, struct pcat_poweroff, nb); >> + >> + if (action != PCAT_CMD_PMU_REQUEST_SHUTDOWN) >> + return NOTIFY_DONE; >> + >> + dev_info(poweroff->dev, "PMU request host shutdown\n"); > > Nope. Drop. I will remove this log print. The PMU will send a shutdown command when the power button is long pressed or the battery is low. I added this line of log to indicate the shutdown command initiated by the PMU so that users will not be confused by the sudden shutdown. > >> + orderly_poweroff(true); >> + >> + return NOTIFY_DONE; > Best regards, > Krzysztof > Thanks for your review, I will fix all problems in next version! Best regards, Junhao
diff --git a/drivers/power/reset/Kconfig b/drivers/power/reset/Kconfig index fece990af4a7..c59529ce25a2 100644 --- a/drivers/power/reset/Kconfig +++ b/drivers/power/reset/Kconfig @@ -148,6 +148,18 @@ config POWER_RESET_ODROID_GO_ULTRA_POWEROFF help This driver supports Power off for Odroid Go Ultra device. +config POWER_RESET_PHOTONICAT_POWEROFF + tristate "Photonicat PMU power-off driver" + depends on MFD_PHOTONICAT_PMU + help + This driver supports Power off for Photonicat PMU device. + + Supports operations: + Host notifies PMU to shutdown + PMU notifies host to shutdown + + Say Y if you have a Photonicat board. + config POWER_RESET_PIIX4_POWEROFF tristate "Intel PIIX4 power-off driver" depends on PCI diff --git a/drivers/power/reset/Makefile b/drivers/power/reset/Makefile index a95d1bd275d1..339b36812b95 100644 --- a/drivers/power/reset/Makefile +++ b/drivers/power/reset/Makefile @@ -17,6 +17,7 @@ obj-$(CONFIG_POWER_RESET_MT6323) += mt6323-poweroff.o obj-$(CONFIG_POWER_RESET_QCOM_PON) += qcom-pon.o obj-$(CONFIG_POWER_RESET_OCELOT_RESET) += ocelot-reset.o obj-$(CONFIG_POWER_RESET_ODROID_GO_ULTRA_POWEROFF) += odroid-go-ultra-poweroff.o +obj-$(CONFIG_POWER_RESET_PHOTONICAT_POWEROFF) += photonicat-poweroff.o obj-$(CONFIG_POWER_RESET_PIIX4_POWEROFF) += piix4-poweroff.o obj-$(CONFIG_POWER_RESET_LTC2952) += ltc2952-poweroff.o obj-$(CONFIG_POWER_RESET_QNAP) += qnap-poweroff.o diff --git a/drivers/power/reset/photonicat-poweroff.c b/drivers/power/reset/photonicat-poweroff.c new file mode 100644 index 000000000000..f9f1ea179247 --- /dev/null +++ b/drivers/power/reset/photonicat-poweroff.c @@ -0,0 +1,95 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2024 Junhao Xie <bigfoot@classfun.cn> + */ + +#include <linux/mfd/photonicat-pmu.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/reboot.h> + +struct pcat_poweroff { + struct device *dev; + struct pcat_pmu *pmu; + struct notifier_block nb; +}; + +static int pcat_do_poweroff(struct sys_off_data *data) +{ + struct pcat_poweroff *poweroff = data->cb_data; + + dev_info(poweroff->dev, "Host request PMU shutdown\n"); + pcat_pmu_write_data(poweroff->pmu, PCAT_CMD_HOST_REQUEST_SHUTDOWN, + NULL, 0); + + return NOTIFY_DONE; +} + +static int pcat_poweroff_notify(struct notifier_block *nb, unsigned long action, + void *data) +{ + struct pcat_poweroff *poweroff = + container_of(nb, struct pcat_poweroff, nb); + + if (action != PCAT_CMD_PMU_REQUEST_SHUTDOWN) + return NOTIFY_DONE; + + dev_info(poweroff->dev, "PMU request host shutdown\n"); + orderly_poweroff(true); + + return NOTIFY_DONE; +} + +static int pcat_poweroff_probe(struct platform_device *pdev) +{ + int ret; + struct device *dev = &pdev->dev; + struct pcat_poweroff *poweroff; + + poweroff = devm_kzalloc(dev, sizeof(*poweroff), GFP_KERNEL); + if (!poweroff) + return -ENOMEM; + + poweroff->dev = dev; + poweroff->pmu = dev_get_drvdata(dev->parent); + poweroff->nb.notifier_call = pcat_poweroff_notify; + platform_set_drvdata(pdev, poweroff); + + ret = devm_register_sys_off_handler(&pdev->dev, + SYS_OFF_MODE_POWER_OFF, + SYS_OFF_PRIO_DEFAULT, + pcat_do_poweroff, + poweroff); + if (ret) + return ret; + + return pcat_pmu_register_notify(poweroff->pmu, &poweroff->nb); +} + +static void pcat_poweroff_remove(struct platform_device *pdev) +{ + struct pcat_poweroff *poweroff = platform_get_drvdata(pdev); + + pcat_pmu_unregister_notify(poweroff->pmu, &poweroff->nb); +} + +static const struct of_device_id pcat_poweroff_dt_ids[] = { + { .compatible = "ariaboard,photonicat-pmu-poweroff", }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, pcat_poweroff_dt_ids); + +static struct platform_driver pcat_poweroff_driver = { + .driver = { + .name = "photonicat-poweroff", + .of_match_table = pcat_poweroff_dt_ids, + }, + .probe = pcat_poweroff_probe, + .remove = pcat_poweroff_remove, +}; +module_platform_driver(pcat_poweroff_driver); + +MODULE_AUTHOR("Junhao Xie <bigfoot@classfun.cn>"); +MODULE_DESCRIPTION("Photonicat PMU Poweroff"); +MODULE_LICENSE("GPL");
This driver implements the shutdown function of Photonicat PMU: - Host notifies PMU to shutdown: When powering off, a shutdown command (0x0F) needs to be sent to the MCU. - PMU notifies host to shutdown: If the power button is long pressed, the MCU will send a shutdown command (0x0D) to the system. If system does not shutdown within 60 seconds, the power will be turned off directly. Signed-off-by: Junhao Xie <bigfoot@classfun.cn> --- drivers/power/reset/Kconfig | 12 +++ drivers/power/reset/Makefile | 1 + drivers/power/reset/photonicat-poweroff.c | 95 +++++++++++++++++++++++ 3 files changed, 108 insertions(+) create mode 100644 drivers/power/reset/photonicat-poweroff.c