linux/drivers/mfd/rsmu_core.c
Min Li a1867f85e0 mfd: Add Renesas Synchronization Management Unit (SMU) support
Add support for ClockMatrix(TM) and 82P33xxx families of timing
and synchronization devices. The access interface can be either
SPI or I2C. Currently, it will create 2 types of MFD devices,
which are to be used by the corresponding rsmu character device
driver and the PTP hardware clock driver, respectively.

Signed-off-by: Min Li <min.li.xe@renesas.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
2021-07-13 12:20:44 +01:00

89 lines
1.6 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* Core driver for Renesas Synchronization Management Unit (SMU) devices.
*
* Copyright (C) 2021 Integrated Device Technology, Inc., a Renesas Company.
*/
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/mfd/core.h>
#include <linux/mfd/rsmu.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include "rsmu.h"
enum {
RSMU_PHC = 0,
RSMU_CDEV = 1,
RSMU_N_DEVS = 2,
};
static struct mfd_cell rsmu_cm_devs[] = {
[RSMU_PHC] = {
.name = "8a3400x-phc",
},
[RSMU_CDEV] = {
.name = "8a3400x-cdev",
},
};
static struct mfd_cell rsmu_sabre_devs[] = {
[RSMU_PHC] = {
.name = "82p33x1x-phc",
},
[RSMU_CDEV] = {
.name = "82p33x1x-cdev",
},
};
static struct mfd_cell rsmu_sl_devs[] = {
[RSMU_PHC] = {
.name = "8v19n85x-phc",
},
[RSMU_CDEV] = {
.name = "8v19n85x-cdev",
},
};
int rsmu_core_init(struct rsmu_ddata *rsmu)
{
struct mfd_cell *cells;
int ret;
switch (rsmu->type) {
case RSMU_CM:
cells = rsmu_cm_devs;
break;
case RSMU_SABRE:
cells = rsmu_sabre_devs;
break;
case RSMU_SL:
cells = rsmu_sl_devs;
break;
default:
dev_err(rsmu->dev, "Unsupported RSMU device type: %d\n", rsmu->type);
return -ENODEV;
}
mutex_init(&rsmu->lock);
ret = devm_mfd_add_devices(rsmu->dev, PLATFORM_DEVID_AUTO, cells,
RSMU_N_DEVS, NULL, 0, NULL);
if (ret < 0)
dev_err(rsmu->dev, "Failed to register sub-devices: %d\n", ret);
return ret;
}
void rsmu_core_exit(struct rsmu_ddata *rsmu)
{
mutex_destroy(&rsmu->lock);
}
MODULE_DESCRIPTION("Renesas SMU core driver");
MODULE_LICENSE("GPL");