Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
60 lines
1.5 KiB
C
60 lines
1.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Copyright (c) 2013, The Linux Foundation. All rights reserved.
|
|
*/
|
|
|
|
#include <linux/bitops.h>
|
|
#include <linux/export.h>
|
|
#include <linux/regmap.h>
|
|
#include <linux/reset-controller.h>
|
|
#include <linux/delay.h>
|
|
|
|
#include "reset.h"
|
|
|
|
static int qcom_reset(struct reset_controller_dev *rcdev, unsigned long id)
|
|
{
|
|
struct qcom_reset_controller *rst = to_qcom_reset_controller(rcdev);
|
|
|
|
rcdev->ops->assert(rcdev, id);
|
|
fsleep(rst->reset_map[id].udelay ?: 1); /* use 1 us as default */
|
|
|
|
rcdev->ops->deassert(rcdev, id);
|
|
return 0;
|
|
}
|
|
|
|
static int qcom_reset_set_assert(struct reset_controller_dev *rcdev,
|
|
unsigned long id, bool assert)
|
|
{
|
|
struct qcom_reset_controller *rst;
|
|
const struct qcom_reset_map *map;
|
|
u32 mask;
|
|
|
|
rst = to_qcom_reset_controller(rcdev);
|
|
map = &rst->reset_map[id];
|
|
mask = map->bitmask ? map->bitmask : BIT(map->bit);
|
|
|
|
regmap_update_bits(rst->regmap, map->reg, mask, assert ? mask : 0);
|
|
|
|
/* Read back the register to ensure write completion, ignore the value */
|
|
regmap_read(rst->regmap, map->reg, &mask);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int qcom_reset_assert(struct reset_controller_dev *rcdev, unsigned long id)
|
|
{
|
|
return qcom_reset_set_assert(rcdev, id, true);
|
|
}
|
|
|
|
static int qcom_reset_deassert(struct reset_controller_dev *rcdev, unsigned long id)
|
|
{
|
|
return qcom_reset_set_assert(rcdev, id, false);
|
|
}
|
|
|
|
const struct reset_control_ops qcom_reset_ops = {
|
|
.reset = qcom_reset,
|
|
.assert = qcom_reset_assert,
|
|
.deassert = qcom_reset_deassert,
|
|
};
|
|
EXPORT_SYMBOL_GPL(qcom_reset_ops);
|