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/* SPDX-License-Identifier: GPL-2.0-only */ /* Copyright (c) 2012-2013, The Linux Foundation. All rights reserved. */ #ifndef _LINUX_SPMI_H #define _LINUX_SPMI_H #include <linux/types.h> #include <linux/device.h> #include <linux/mod_devicetable.h> /* Maximum slave identifier */ #define SPMI_MAX_SLAVE_ID 16 /* SPMI Commands */ #define SPMI_CMD_EXT_WRITE 0x00 #define SPMI_CMD_RESET 0x10 #define SPMI_CMD_SLEEP 0x11 #define SPMI_CMD_SHUTDOWN 0x12 #define SPMI_CMD_WAKEUP 0x13 #define SPMI_CMD_AUTHENTICATE 0x14 #define SPMI_CMD_MSTR_READ 0x15 #define SPMI_CMD_MSTR_WRITE 0x16 #define SPMI_CMD_TRANSFER_BUS_OWNERSHIP 0x1A #define SPMI_CMD_DDB_MASTER_READ 0x1B #define SPMI_CMD_DDB_SLAVE_READ 0x1C #define SPMI_CMD_EXT_READ 0x20 #define SPMI_CMD_EXT_WRITEL 0x30 #define SPMI_CMD_EXT_READL 0x38 #define SPMI_CMD_WRITE 0x40 #define SPMI_CMD_READ 0x60 #define SPMI_CMD_ZERO_WRITE 0x80 /** * struct spmi_device - Basic representation of an SPMI device * @dev: Driver model representation of the device. * @ctrl: SPMI controller managing the bus hosting this device. * @usid: This devices' Unique Slave IDentifier. */ struct spmi_device { struct device dev; struct spmi_controller *ctrl; u8 usid; }; static inline struct spmi_device *to_spmi_device(struct device *d) { return container_of(d, struct spmi_device, dev); } static inline void *spmi_device_get_drvdata(const struct spmi_device *sdev) { return dev_get_drvdata(&sdev->dev); } static inline void spmi_device_set_drvdata(struct spmi_device *sdev, void *data) { dev_set_drvdata(&sdev->dev, data); } struct spmi_device *spmi_device_alloc(struct spmi_controller *ctrl); static inline void spmi_device_put(struct spmi_device *sdev) { if (sdev) put_device(&sdev->dev); } int spmi_device_add(struct spmi_device *sdev); void spmi_device_remove(struct spmi_device *sdev); /** * struct spmi_controller - interface to the SPMI master controller * @dev: Driver model representation of the device. * @nr: board-specific number identifier for this controller/bus * @cmd: sends a non-data command sequence on the SPMI bus. * @read_cmd: sends a register read command sequence on the SPMI bus. * @write_cmd: sends a register write command sequence on the SPMI bus. */ struct spmi_controller { struct device dev; unsigned int nr; int (*cmd)(struct spmi_controller *ctrl, u8 opcode, u8 sid); int (*read_cmd)(struct spmi_controller *ctrl, u8 opcode, u8 sid, u16 addr, u8 *buf, size_t len); int (*write_cmd)(struct spmi_controller *ctrl, u8 opcode, u8 sid, u16 addr, const u8 *buf, size_t len); }; static inline struct spmi_controller *to_spmi_controller(struct device *d) { return container_of(d, struct spmi_controller, dev); } static inline void *spmi_controller_get_drvdata(const struct spmi_controller *ctrl) { return dev_get_drvdata(&ctrl->dev); } static inline void spmi_controller_set_drvdata(struct spmi_controller *ctrl, void *data) { dev_set_drvdata(&ctrl->dev, data); } struct spmi_controller *spmi_controller_alloc(struct device *parent, size_t size); /** * spmi_controller_put() - decrement controller refcount * @ctrl SPMI controller. */ static inline void spmi_controller_put(struct spmi_controller *ctrl) { if (ctrl) put_device(&ctrl->dev); } int spmi_controller_add(struct spmi_controller *ctrl); void spmi_controller_remove(struct spmi_controller *ctrl); struct spmi_controller *devm_spmi_controller_alloc(struct device *parent, size_t size); int devm_spmi_controller_add(struct device *parent, struct spmi_controller *ctrl); /** * struct spmi_driver - SPMI slave device driver * @driver: SPMI device drivers should initialize name and owner field of * this structure. * @probe: binds this driver to a SPMI device. * @remove: unbinds this driver from the SPMI device. * * If PM runtime support is desired for a slave, a device driver can call * pm_runtime_put() from their probe() routine (and a balancing * pm_runtime_get() in remove()). PM runtime support for a slave is * implemented by issuing a SLEEP command to the slave on runtime_suspend(), * transitioning the slave into the SLEEP state. On runtime_resume(), a WAKEUP * command is sent to the slave to bring it back to ACTIVE. */ struct spmi_driver { struct device_driver driver; int (*probe)(struct spmi_device *sdev); void (*remove)(struct spmi_device *sdev); void (*shutdown)(struct spmi_device *sdev); }; static inline struct spmi_driver *to_spmi_driver(struct device_driver *d) { return container_of(d, struct spmi_driver, driver); } #define spmi_driver_register(sdrv) \ __spmi_driver_register(sdrv, THIS_MODULE) int __spmi_driver_register(struct spmi_driver *sdrv, struct module *owner); /** * spmi_driver_unregister() - unregister an SPMI client driver * @sdrv: the driver to unregister */ static inline void spmi_driver_unregister(struct spmi_driver *sdrv) { if (sdrv) driver_unregister(&sdrv->driver); } #define module_spmi_driver(__spmi_driver) \ module_driver(__spmi_driver, spmi_driver_register, \ spmi_driver_unregister) struct device_node; struct spmi_device *spmi_find_device_by_of_node(struct device_node *np); int spmi_register_read(struct spmi_device *sdev, u8 addr, u8 *buf); int spmi_ext_register_read(struct spmi_device *sdev, u8 addr, u8 *buf, size_t len); int spmi_ext_register_readl(struct spmi_device *sdev, u16 addr, u8 *buf, size_t len); int spmi_register_write(struct spmi_device *sdev, u8 addr, u8 data); int spmi_register_zero_write(struct spmi_device *sdev, u8 data); int spmi_ext_register_write(struct spmi_device *sdev, u8 addr, const u8 *buf, size_t len); int spmi_ext_register_writel(struct spmi_device *sdev, u16 addr, const u8 *buf, size_t len); int spmi_command_reset(struct spmi_device *sdev); int spmi_command_sleep(struct spmi_device *sdev); int spmi_command_wakeup(struct spmi_device *sdev); int spmi_command_shutdown(struct spmi_device *sdev); #endif