mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-25 05:34:00 +08:00
57b33ff077
Chromebooks can have more than one Embedded Controller so the cros_ec device id has to be incremented for each EC registered. Add a new structure to represent multiple EC as different char devices (e.g: /dev/cros_ec, /dev/cros_pd). It connects to cros_ec_device and allows sysfs inferface for cros_pd. Also reduce number of allocated objects, make chromeos sysfs class object a static and add refcounting to prevent object deletion while command is in progress. Signed-off-by: Gwendal Grignou <gwendal@chromium.org> Reviewed-by: Dmitry Torokhov <dtor@chromium.org> Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk> Tested-by: Heiko Stuebner <heiko@sntech.de> Acked-by: Lee Jones <lee.jones@linaro.org> Acked-by: Olof Johansson <olof@lixom.net> Signed-off-by: Lee Jones <lee.jones@linaro.org>
47 lines
1.5 KiB
C
47 lines
1.5 KiB
C
/*
|
|
* cros_ec_dev - expose the Chrome OS Embedded Controller to userspace
|
|
*
|
|
* Copyright (C) 2014 Google, Inc.
|
|
*
|
|
* 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, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#ifndef _CROS_EC_DEV_H_
|
|
#define _CROS_EC_DEV_H_
|
|
|
|
#include <linux/ioctl.h>
|
|
#include <linux/types.h>
|
|
#include <linux/mfd/cros_ec.h>
|
|
|
|
#define CROS_EC_DEV_VERSION "1.0.0"
|
|
|
|
/*
|
|
* @offset: within EC_LPC_ADDR_MEMMAP region
|
|
* @bytes: number of bytes to read. zero means "read a string" (including '\0')
|
|
* (at most only EC_MEMMAP_SIZE bytes can be read)
|
|
* @buffer: where to store the result
|
|
* ioctl returns the number of bytes read, negative on error
|
|
*/
|
|
struct cros_ec_readmem {
|
|
uint32_t offset;
|
|
uint32_t bytes;
|
|
uint8_t buffer[EC_MEMMAP_SIZE];
|
|
};
|
|
|
|
#define CROS_EC_DEV_IOC 0xEC
|
|
#define CROS_EC_DEV_IOCXCMD _IOWR(CROS_EC_DEV_IOC, 0, struct cros_ec_command)
|
|
#define CROS_EC_DEV_IOCRDMEM _IOWR(CROS_EC_DEV_IOC, 1, struct cros_ec_readmem)
|
|
|
|
#endif /* _CROS_EC_DEV_H_ */
|