mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-16 00:56:49 +07:00
1ab0a1192d
Drivers which use the SMBus extensions select I2C_SMBUS, so the stubs are not needed. Signed-off-by: Jean Delvare <jdelvare@suse.de> Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
81 lines
2.8 KiB
C
81 lines
2.8 KiB
C
/*
|
|
* i2c-smbus.h - SMBus extensions to the I2C protocol
|
|
*
|
|
* Copyright (C) 2010 Jean Delvare <jdelvare@suse.de>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
|
|
* MA 02110-1301 USA.
|
|
*/
|
|
|
|
#ifndef _LINUX_I2C_SMBUS_H
|
|
#define _LINUX_I2C_SMBUS_H
|
|
|
|
#include <linux/i2c.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/workqueue.h>
|
|
|
|
|
|
/**
|
|
* i2c_smbus_alert_setup - platform data for the smbus_alert i2c client
|
|
* @alert_edge_triggered: whether the alert interrupt is edge (1) or level (0)
|
|
* triggered
|
|
* @irq: IRQ number, if the smbus_alert driver should take care of interrupt
|
|
* handling
|
|
*
|
|
* If irq is not specified, the smbus_alert driver doesn't take care of
|
|
* interrupt handling. In that case it is up to the I2C bus driver to either
|
|
* handle the interrupts or to poll for alerts.
|
|
*
|
|
* If irq is specified then it it crucial that alert_edge_triggered is
|
|
* properly set.
|
|
*/
|
|
struct i2c_smbus_alert_setup {
|
|
unsigned int alert_edge_triggered:1;
|
|
int irq;
|
|
};
|
|
|
|
struct i2c_client *i2c_setup_smbus_alert(struct i2c_adapter *adapter,
|
|
struct i2c_smbus_alert_setup *setup);
|
|
int i2c_handle_smbus_alert(struct i2c_client *ara);
|
|
|
|
/**
|
|
* smbus_host_notify - internal structure used by the Host Notify mechanism.
|
|
* @adapter: the I2C adapter associated with this struct
|
|
* @work: worker used to schedule the IRQ in the slave device
|
|
* @lock: spinlock to check if a notification is already pending
|
|
* @pending: flag set when a notification is pending (any new notification will
|
|
* be rejected if pending is true)
|
|
* @payload: the actual payload of the Host Notify event
|
|
* @addr: the address of the slave device which raised the notification
|
|
*
|
|
* This struct needs to be allocated by i2c_setup_smbus_host_notify() and does
|
|
* not need to be freed. Internally, i2c_setup_smbus_host_notify() uses a
|
|
* managed resource to clean this up when the adapter get released.
|
|
*/
|
|
struct smbus_host_notify {
|
|
struct i2c_adapter *adapter;
|
|
struct work_struct work;
|
|
spinlock_t lock;
|
|
bool pending;
|
|
u16 payload;
|
|
u8 addr;
|
|
};
|
|
|
|
struct smbus_host_notify *i2c_setup_smbus_host_notify(struct i2c_adapter *adap);
|
|
int i2c_handle_smbus_host_notify(struct smbus_host_notify *host_notify,
|
|
unsigned short addr, unsigned int data);
|
|
|
|
#endif /* _LINUX_I2C_SMBUS_H */
|