mirror of
https://github.com/torvalds/linux.git
synced 2024-11-04 11:04:38 +00:00
f39bb4579c
The mtk_reset_ops structure is never modified. Make it const. Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de> Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
98 lines
2.3 KiB
C
98 lines
2.3 KiB
C
/*
|
|
* Copyright (c) 2014 MediaTek Inc.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#include <linux/mfd/syscon.h>
|
|
#include <linux/module.h>
|
|
#include <linux/of.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/regmap.h>
|
|
#include <linux/reset-controller.h>
|
|
#include <linux/slab.h>
|
|
|
|
#include "clk-mtk.h"
|
|
|
|
struct mtk_reset {
|
|
struct regmap *regmap;
|
|
int regofs;
|
|
struct reset_controller_dev rcdev;
|
|
};
|
|
|
|
static int mtk_reset_assert(struct reset_controller_dev *rcdev,
|
|
unsigned long id)
|
|
{
|
|
struct mtk_reset *data = container_of(rcdev, struct mtk_reset, rcdev);
|
|
|
|
return regmap_update_bits(data->regmap, data->regofs + ((id / 32) << 2),
|
|
BIT(id % 32), ~0);
|
|
}
|
|
|
|
static int mtk_reset_deassert(struct reset_controller_dev *rcdev,
|
|
unsigned long id)
|
|
{
|
|
struct mtk_reset *data = container_of(rcdev, struct mtk_reset, rcdev);
|
|
|
|
return regmap_update_bits(data->regmap, data->regofs + ((id / 32) << 2),
|
|
BIT(id % 32), 0);
|
|
}
|
|
|
|
static int mtk_reset(struct reset_controller_dev *rcdev,
|
|
unsigned long id)
|
|
{
|
|
int ret;
|
|
|
|
ret = mtk_reset_assert(rcdev, id);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return mtk_reset_deassert(rcdev, id);
|
|
}
|
|
|
|
static const struct reset_control_ops mtk_reset_ops = {
|
|
.assert = mtk_reset_assert,
|
|
.deassert = mtk_reset_deassert,
|
|
.reset = mtk_reset,
|
|
};
|
|
|
|
void mtk_register_reset_controller(struct device_node *np,
|
|
unsigned int num_regs, int regofs)
|
|
{
|
|
struct mtk_reset *data;
|
|
int ret;
|
|
struct regmap *regmap;
|
|
|
|
regmap = syscon_node_to_regmap(np);
|
|
if (IS_ERR(regmap)) {
|
|
pr_err("Cannot find regmap for %s: %ld\n", np->full_name,
|
|
PTR_ERR(regmap));
|
|
return;
|
|
}
|
|
|
|
data = kzalloc(sizeof(*data), GFP_KERNEL);
|
|
if (!data)
|
|
return;
|
|
|
|
data->regmap = regmap;
|
|
data->regofs = regofs;
|
|
data->rcdev.owner = THIS_MODULE;
|
|
data->rcdev.nr_resets = num_regs * 32;
|
|
data->rcdev.ops = &mtk_reset_ops;
|
|
data->rcdev.of_node = np;
|
|
|
|
ret = reset_controller_register(&data->rcdev);
|
|
if (ret) {
|
|
pr_err("could not register reset controller: %d\n", ret);
|
|
kfree(data);
|
|
return;
|
|
}
|
|
}
|