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reset: starfive: Add StarFive JH7110 reset driver

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Add auxiliary driver to support StarFive JH7110 system
and always-on resets.

Tested-by: Tommaso Merciai <tomm.merciai@gmail.com>
Reviewed-by: Emil Renner Berthing <emil.renner.berthing@canonical.com>
Signed-off-by: Hal Feng <hal.feng@starfivetech.com>
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
This commit is contained in:
Hal Feng 2023-04-01 19:19:27 +08:00 committed by Conor Dooley
parent b2ab3c94f4
commit 82327b127d
3 changed files with 79 additions and 0 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

8
drivers/reset/starfive/Kconfig
View file

@ -10,3 +10,11 @@ config RESET_STARFIVE_JH7100
default ARCH_STARFIVE
help
This enables the reset controller driver for the StarFive JH7100 SoC.
config RESET_STARFIVE_JH7110
bool "StarFive JH7110 Reset Driver"
depends on AUXILIARY_BUS && CLK_STARFIVE_JH7110_SYS
select RESET_STARFIVE_JH71X0
default ARCH_STARFIVE
help
This enables the reset controller driver for the StarFive JH7110 SoC.

1
drivers/reset/starfive/Makefile
View file

@ -2,3 +2,4 @@
obj-$(CONFIG_RESET_STARFIVE_JH71X0) += reset-starfive-jh71x0.o
obj-$(CONFIG_RESET_STARFIVE_JH7100) += reset-starfive-jh7100.o
obj-$(CONFIG_RESET_STARFIVE_JH7110) += reset-starfive-jh7110.o

70
drivers/reset/starfive/reset-starfive-jh7110.c Normal file
View file

@ -0,0 +1,70 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Reset driver for the StarFive JH7110 SoC
*
* Copyright (C) 2022 StarFive Technology Co., Ltd.
*/
#include <linux/auxiliary_bus.h>
#include "reset-starfive-jh71x0.h"
#include <dt-bindings/reset/starfive,jh7110-crg.h>
struct jh7110_reset_info {
unsigned int nr_resets;
unsigned int assert_offset;
unsigned int status_offset;
};
static const struct jh7110_reset_info jh7110_sys_info = {
.nr_resets = JH7110_SYSRST_END,
.assert_offset = 0x2F8,
.status_offset = 0x308,
};
static const struct jh7110_reset_info jh7110_aon_info = {
.nr_resets = JH7110_AONRST_END,
.assert_offset = 0x38,
.status_offset = 0x3C,
};
static int jh7110_reset_probe(struct auxiliary_device *adev,
const struct auxiliary_device_id *id)
{
struct jh7110_reset_info *info = (struct jh7110_reset_info *)(id->driver_data);
void __iomem **base = (void __iomem **)dev_get_drvdata(adev->dev.parent);
if (!info || !base)
return -ENODEV;
return reset_starfive_jh71x0_register(&adev->dev, adev->dev.parent->of_node,
*base + info->assert_offset,
*base + info->status_offset,
NULL,
info->nr_resets,
NULL);
}
static const struct auxiliary_device_id jh7110_reset_ids[] = {
{
.name = "clk_starfive_jh7110_sys.rst-sys",
.driver_data = (kernel_ulong_t)&jh7110_sys_info,
},
{
.name = "clk_starfive_jh7110_sys.rst-aon",
.driver_data = (kernel_ulong_t)&jh7110_aon_info,
},
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(auxiliary, jh7110_reset_ids);
static struct auxiliary_driver jh7110_reset_driver = {
.probe = jh7110_reset_probe,
.id_table = jh7110_reset_ids,
};
module_auxiliary_driver(jh7110_reset_driver);
MODULE_AUTHOR("Hal Feng <hal.feng@starfivetech.com>");
MODULE_DESCRIPTION("StarFive JH7110 reset driver");
MODULE_LICENSE("GPL");