mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-26 14:14:01 +08:00
648ea01340
Allow board support code to collect pre-declarations for MDIO devices by registering them with mdiobus_register_board_info(). SPI and I2C buses have a similar feature, we were missing this for MDIO devices, but this is particularly useful for e.g: MDIO-connected switches which need to provide their port layout (often board-specific) to a MDIO Ethernet switch driver. Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
87 lines
2.2 KiB
C
87 lines
2.2 KiB
C
/*
|
|
* mdio-boardinfo - Collect pre-declarations for MDIO devices
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/export.h>
|
|
#include <linux/mutex.h>
|
|
#include <linux/list.h>
|
|
|
|
#include "mdio-boardinfo.h"
|
|
|
|
static LIST_HEAD(mdio_board_list);
|
|
static DEFINE_MUTEX(mdio_board_lock);
|
|
|
|
/**
|
|
* mdiobus_setup_mdiodev_from_board_info - create and setup MDIO devices
|
|
* from pre-collected board specific MDIO information
|
|
* @mdiodev: MDIO device pointer
|
|
* Context: can sleep
|
|
*/
|
|
void mdiobus_setup_mdiodev_from_board_info(struct mii_bus *bus)
|
|
{
|
|
struct mdio_board_entry *be;
|
|
struct mdio_device *mdiodev;
|
|
struct mdio_board_info *bi;
|
|
int ret;
|
|
|
|
mutex_lock(&mdio_board_lock);
|
|
list_for_each_entry(be, &mdio_board_list, list) {
|
|
bi = &be->board_info;
|
|
|
|
if (strcmp(bus->id, bi->bus_id))
|
|
continue;
|
|
|
|
mdiodev = mdio_device_create(bus, bi->mdio_addr);
|
|
if (IS_ERR(mdiodev))
|
|
continue;
|
|
|
|
strncpy(mdiodev->modalias, bi->modalias,
|
|
sizeof(mdiodev->modalias));
|
|
mdiodev->bus_match = mdio_device_bus_match;
|
|
mdiodev->dev.platform_data = (void *)bi->platform_data;
|
|
|
|
ret = mdio_device_register(mdiodev);
|
|
if (ret) {
|
|
mdio_device_free(mdiodev);
|
|
continue;
|
|
}
|
|
}
|
|
mutex_unlock(&mdio_board_lock);
|
|
}
|
|
|
|
/**
|
|
* mdio_register_board_info - register MDIO devices for a given board
|
|
* @info: array of devices descriptors
|
|
* @n: number of descriptors provided
|
|
* Context: can sleep
|
|
*
|
|
* The board info passed can be marked with __initdata but be pointers
|
|
* such as platform_data etc. are copied as-is
|
|
*/
|
|
int mdiobus_register_board_info(const struct mdio_board_info *info,
|
|
unsigned int n)
|
|
{
|
|
struct mdio_board_entry *be;
|
|
unsigned int i;
|
|
|
|
be = kcalloc(n, sizeof(*be), GFP_KERNEL);
|
|
if (!be)
|
|
return -ENOMEM;
|
|
|
|
for (i = 0; i < n; i++, be++, info++) {
|
|
memcpy(&be->board_info, info, sizeof(*info));
|
|
mutex_lock(&mdio_board_lock);
|
|
list_add_tail(&be->list, &mdio_board_list);
|
|
mutex_unlock(&mdio_board_lock);
|
|
}
|
|
|
|
return 0;
|
|
}
|