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Fri, 10 Feb 2023 02:03:37 -0800 (PST) Received: from arrakeen.starnux.net ([2a01:e0a:982:cbb0:8261:5fff:fe11:bdda]) by smtp.gmail.com with ESMTPSA id c63-20020a1c3542000000b003df14531724sm7959820wma.21.2023.02.10.02.03.36 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 10 Feb 2023 02:03:37 -0800 (PST) From: Neil Armstrong Date: Fri, 10 Feb 2023 11:03:36 +0100 Subject: [PATCH v3] power: reset: add Odroid Go Ultra poweroff driver MIME-Version: 1.0 Message-Id: <20230126-b4-odroid-go-ultra-poweroff-v3-1-0a7fd3d5c4b3@linaro.org> X-B4-Tracking: v=1; b=H4sIAHcW5mMC/42OTQ6CMBBGr0K6dgy2SNCV9zAs+jOFJk2HTAE1h LtbOYHL9xbf+zaRkQNmca82wbiGHCgVUKdK2FGnASG4wkLWUtUX2YJpgBxTcDAQLHFmDRO9kMl 7sJ13Vt+UV2hEWTA6IxjWyY5lIy0xFjkx+vA+ks++8BjyTPw5HqzyZ/+LrRIuoDt7rbu29Y22j xiSZjoTD6Lf9/0LZsbnltwAAAA= To: Sebastian Reichel Cc: linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, linux-amlogic@lists.infradead.org, Neil Armstrong X-Mailer: b4 0.12.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230210_020340_079095_0B264E53 X-CRM114-Status: GOOD ( 21.02 ) X-BeenThere: linux-amlogic@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-amlogic" Errors-To: linux-amlogic-bounces+linux-amlogic=archiver.kernel.org@lists.infradead.org The Hardkernel Odroid Go Ultra poweroff scheme requires requesting a poweroff to its two PMICs in order, this represents the poweroff scheme needed to complete a clean poweroff of the system. This implement this scheme by implementing a self registering driver to permit using probe defer until both pmics are finally probed. Signed-off-by: Neil Armstrong --- Previous submission was at [1], but I converted it to an independent platform device with device auto registration to permit waiting for both the PMICs drivers to probe. [1] https://lore.kernel.org/all/20221031-b4-odroid-go-ultra-initial-v1-2-42e3dbea86d5@linaro.org/ --- Changes in v3: - Removed dependency with rk08 - Switched to storing struct device of pmics - Fixed module init/exit - Link to v2: https://lore.kernel.org/r/20230126-b4-odroid-go-ultra-poweroff-v2-1-a8c50866f4ac@linaro.org Changes in v2: - Switched to devm_register_sys_off_handler() - Link to v1: https://lore.kernel.org/r/20221031-b4-odroid-go-ultra-initial-v1-2-42e3dbea86d5@linaro.org --- drivers/power/reset/Kconfig | 7 + drivers/power/reset/Makefile | 1 + drivers/power/reset/odroid-go-ultra-poweroff.c | 193 +++++++++++++++++++++++++ 3 files changed, 201 insertions(+) --- base-commit: 38d2b86a665b5e86371a1a30228bce259aa6c101 change-id: 20230126-b4-odroid-go-ultra-poweroff-c8fdca93f3eb Best regards, diff --git a/drivers/power/reset/Kconfig b/drivers/power/reset/Kconfig index a8c46ba5878f..a47ef7a9fc13 100644 --- a/drivers/power/reset/Kconfig +++ b/drivers/power/reset/Kconfig @@ -141,6 +141,13 @@ config POWER_RESET_OCELOT_RESET help This driver supports restart for Microsemi Ocelot SoC and similar. +config POWER_RESET_ODROID_GO_ULTRA_POWEROFF + bool "Odroid Go Ultra power-off driver" + depends on ARCH_MESON || COMPILE_TEST + depends on OF + help + This driver supports Power off for Odroid Go Ultra device. + config POWER_RESET_OXNAS bool "OXNAS SoC restart driver" depends on ARCH_OXNAS diff --git a/drivers/power/reset/Makefile b/drivers/power/reset/Makefile index 0a39424fc558..d763e6735ee3 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_OXNAS) += oxnas-restart.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_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/odroid-go-ultra-poweroff.c b/drivers/power/reset/odroid-go-ultra-poweroff.c new file mode 100644 index 000000000000..30a005088fbe --- /dev/null +++ b/drivers/power/reset/odroid-go-ultra-poweroff.c @@ -0,0 +1,193 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (c) 2023 Neil Armstrong + */ +#include +#include +#include +#include +#include +#include +#include +#include + +/* + * The Odroid Go Ultra has 2 PMICs: + * - RK818 (manages the battery and USB-C power supply) + * - RK817 + * Both PMICs feeds power to the S922X SoC, so they must be powered-off in sequence. + * Vendor does power-off the RK817 first, then the RK818 so here we follow this sequence. + */ + +struct odroid_go_ultra_poweroff_data { + struct device *dev; + struct device *rk817; + struct device *rk818; +}; + +static int odroid_go_ultra_poweroff_prepare(struct sys_off_data *data) +{ + struct odroid_go_ultra_poweroff_data *poweroff_data = data->cb_data; + struct regmap *rk817, *rk818; + int ret; + + /* RK817 Regmap */ + rk817 = dev_get_regmap(poweroff_data->rk817, NULL); + if (!rk817) { + dev_err(poweroff_data->dev, "failed to get rk817 regmap\n"); + return notifier_from_errno(-EINVAL); + } + + /* RK818 Regmap */ + rk818 = dev_get_regmap(poweroff_data->rk818, NULL); + if (!rk818) { + dev_err(poweroff_data->dev, "failed to get rk818 regmap\n"); + return notifier_from_errno(-EINVAL); + } + + dev_info(poweroff_data->dev, "Setting PMICs for power off"); + + /* RK817 */ + ret = regmap_update_bits(rk817, RK817_SYS_CFG(3), DEV_OFF, DEV_OFF); + if (ret) { + dev_err(poweroff_data->dev, "failed to poweroff rk817\n"); + return notifier_from_errno(ret); + } + + /* RK818 */ + ret = regmap_update_bits(rk818, RK818_DEVCTRL_REG, DEV_OFF, DEV_OFF); + if (ret) { + dev_err(poweroff_data->dev, "failed to poweroff rk818\n"); + return notifier_from_errno(ret); + } + + return NOTIFY_OK; +} + +static int odroid_go_ultra_poweroff_get_pmic_device(const char *compatible, struct device **pmic) +{ + struct device_node *pmic_node; + struct i2c_client *pmic_client; + + pmic_node = of_find_compatible_node(NULL, NULL, compatible); + if (!pmic_node) + return -ENODEV; + + pmic_client = of_find_i2c_device_by_node(pmic_node); + of_node_put(pmic_node); + if (!pmic_client) + return -EPROBE_DEFER; + + *pmic = &pmic_client->dev; + + return 0; +} + +static int odroid_go_ultra_poweroff_probe(struct platform_device *pdev) +{ + struct odroid_go_ultra_poweroff_data *poweroff_data; + int ret; + + poweroff_data = devm_kzalloc(&pdev->dev, sizeof(*poweroff_data), GFP_KERNEL); + if (!poweroff_data) + return -ENOMEM; + + dev_set_drvdata(&pdev->dev, poweroff_data); + + /* RK818 PMIC Device */ + ret = odroid_go_ultra_poweroff_get_pmic_device("rockchip,rk818", + &poweroff_data->rk818); + if (ret) + return dev_err_probe(&pdev->dev, ret, "failed to get rk818 mfd data\n"); + + /* RK817 PMIC Device */ + ret = odroid_go_ultra_poweroff_get_pmic_device("rockchip,rk817", + &poweroff_data->rk817); + if (ret) { + ret = dev_err_probe(&pdev->dev, ret, "failed to get rk817 mfd data\n"); + goto put_rk818_device; + } + + /* Register as SYS_OFF_MODE_POWER_OFF_PREPARE because regmap_update_bits may sleep */ + ret = devm_register_sys_off_handler(&pdev->dev, + SYS_OFF_MODE_POWER_OFF_PREPARE, + SYS_OFF_PRIO_DEFAULT, + odroid_go_ultra_poweroff_prepare, + poweroff_data); + if (ret) { + ret = dev_err_probe(&pdev->dev, ret, "failed to register sys-off handler\n"); + goto put_rk817_device; + } + + dev_info(&pdev->dev, "Registered Power-Off handler\n"); + + return 0; + +put_rk817_device: + put_device(poweroff_data->rk817); + +put_rk818_device: + put_device(poweroff_data->rk818); + + return ret; +} + +static int odroid_go_ultra_poweroff_remove(struct platform_device *pdev) +{ + struct odroid_go_ultra_poweroff_data *poweroff_data = dev_get_drvdata(&pdev->dev); + + put_device(poweroff_data->rk818); + put_device(poweroff_data->rk817); + + return 0; +} + +static struct platform_device *pdev; + +static struct platform_driver odroid_go_ultra_poweroff_driver = { + .driver = { + .name = "odroid-go-ultra-poweroff", + }, + .probe = odroid_go_ultra_poweroff_probe, + .remove = odroid_go_ultra_poweroff_remove, +}; + +static int __init odroid_go_ultra_poweroff_init(void) +{ + int ret; + + /* Only create when running on the Odroid Go Ultra device */ + if (!of_device_is_compatible(of_root, "hardkernel,odroid-go-ultra")) + return -ENODEV; + + ret = platform_driver_register(&odroid_go_ultra_poweroff_driver); + if (ret) + return ret; + + pdev = platform_device_register_resndata(NULL, "odroid-go-ultra-poweroff", -1, + NULL, 0, NULL, 0); + + if (IS_ERR(pdev)) { + platform_driver_unregister(&odroid_go_ultra_poweroff_driver); + return PTR_ERR(pdev); + } + + return 0; +} + +static void __exit odroid_go_ultra_poweroff_exit(void) +{ + /* Only delete when running on the Odroid Go Ultra device */ + if (!of_device_is_compatible(of_root, "hardkernel,odroid-go-ultra")) + return; + + platform_device_unregister(pdev); + platform_driver_unregister(&odroid_go_ultra_poweroff_driver); +} + +module_init(odroid_go_ultra_poweroff_init); +module_exit(odroid_go_ultra_poweroff_exit); + +MODULE_AUTHOR("Neil Armstrong "); +MODULE_DESCRIPTION("Odroid Go Ultra poweroff driver"); +MODULE_LICENSE("GPL");