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reset: oxnas: remove obsolete reset driver

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Due to lack of maintainance and stall of development for a few years now,
and since no new features will ever be added upstream, remove support
for OX810 and OX820 peripheral reset.

Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Acked-by: Daniel Golle <daniel@makrotopia.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20230331-topic-oxnas-upstream-remove-v1-17-5bd58fd1dd1f@linaro.org
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
This commit is contained in:
Neil Armstrong 2023-03-31 10:34:55 +02:00 committed by Philipp Zabel
parent 20a6a4d722
commit ac59ed9cdb
4 changed files with 0 additions and 150 deletions
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32
Documentation/devicetree/bindings/reset/oxnas,reset.txt
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@ -1,32 +0,0 @@
Oxford Semiconductor OXNAS SoC Family RESET Controller
================================================
Please also refer to reset.txt in this directory for common reset
controller binding usage.
Required properties:
- compatible: For OX810SE, should be "oxsemi,ox810se-reset"
For OX820, should be "oxsemi,ox820-reset"
- #reset-cells: 1, see below
Parent node should have the following properties :
- compatible: For OX810SE, should be :
"oxsemi,ox810se-sys-ctrl", "syscon", "simple-mfd"
For OX820, should be :
"oxsemi,ox820-sys-ctrl", "syscon", "simple-mfd"
Reset indices are in dt-bindings include files :
- For OX810SE: include/dt-bindings/reset/oxsemi,ox810se.h
- For OX820: include/dt-bindings/reset/oxsemi,ox820.h
example:
sys: sys-ctrl@000000 {
compatible = "oxsemi,ox810se-sys-ctrl", "syscon", "simple-mfd";
reg = <0x000000 0x100000>;
reset: reset-controller {
compatible = "oxsemi,ox810se-reset";
#reset-cells = <1>;
};
};

3
drivers/reset/Kconfig
View File

@ -143,9 +143,6 @@ config RESET_NPCM
This enables the reset controller driver for Nuvoton NPCM
BMC SoCs.
config RESET_OXNAS
bool
config RESET_PISTACHIO
bool "Pistachio Reset Driver"
depends on MIPS || COMPILE_TEST

1
drivers/reset/Makefile
View File

@ -21,7 +21,6 @@ obj-$(CONFIG_RESET_MCHP_SPARX5) += reset-microchip-sparx5.o
obj-$(CONFIG_RESET_MESON) += reset-meson.o
obj-$(CONFIG_RESET_MESON_AUDIO_ARB) += reset-meson-audio-arb.o
obj-$(CONFIG_RESET_NPCM) += reset-npcm.o
obj-$(CONFIG_RESET_OXNAS) += reset-oxnas.o
obj-$(CONFIG_RESET_PISTACHIO) += reset-pistachio.o
obj-$(CONFIG_RESET_POLARFIRE_SOC) += reset-mpfs.o
obj-$(CONFIG_RESET_QCOM_AOSS) += reset-qcom-aoss.o

114
drivers/reset/reset-oxnas.c
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@ -1,114 +0,0 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* Oxford Semiconductor Reset Controller driver
*
* Copyright (C) 2016 Neil Armstrong <narmstrong@baylibre.com>
* Copyright (C) 2014 Ma Haijun <mahaijuns@gmail.com>
* Copyright (C) 2009 Oxford Semiconductor Ltd
*/
#include <linux/err.h>
#include <linux/init.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/reset-controller.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/types.h>
#include <linux/regmap.h>
#include <linux/mfd/syscon.h>
/* Regmap offsets */
#define RST_SET_REGOFFSET 0x34
#define RST_CLR_REGOFFSET 0x38
struct oxnas_reset {
struct regmap *regmap;
struct reset_controller_dev rcdev;
};
static int oxnas_reset_reset(struct reset_controller_dev *rcdev,
unsigned long id)
{
struct oxnas_reset *data =
container_of(rcdev, struct oxnas_reset, rcdev);
regmap_write(data->regmap, RST_SET_REGOFFSET, BIT(id));
msleep(50);
regmap_write(data->regmap, RST_CLR_REGOFFSET, BIT(id));
return 0;
}
static int oxnas_reset_assert(struct reset_controller_dev *rcdev,
unsigned long id)
{
struct oxnas_reset *data =
container_of(rcdev, struct oxnas_reset, rcdev);
regmap_write(data->regmap, RST_SET_REGOFFSET, BIT(id));
return 0;
}
static int oxnas_reset_deassert(struct reset_controller_dev *rcdev,
unsigned long id)
{
struct oxnas_reset *data =
container_of(rcdev, struct oxnas_reset, rcdev);
regmap_write(data->regmap, RST_CLR_REGOFFSET, BIT(id));
return 0;
}
static const struct reset_control_ops oxnas_reset_ops = {
.reset = oxnas_reset_reset,
.assert = oxnas_reset_assert,
.deassert = oxnas_reset_deassert,
};
static const struct of_device_id oxnas_reset_dt_ids[] = {
{ .compatible = "oxsemi,ox810se-reset", },
{ .compatible = "oxsemi,ox820-reset", },
{ /* sentinel */ },
};
static int oxnas_reset_probe(struct platform_device *pdev)
{
struct oxnas_reset *data;
struct device *parent;
parent = pdev->dev.parent;
if (!parent) {
dev_err(&pdev->dev, "no parent\n");
return -ENODEV;
}
data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
if (!data)
return -ENOMEM;
data->regmap = syscon_node_to_regmap(parent->of_node);
if (IS_ERR(data->regmap)) {
dev_err(&pdev->dev, "failed to get parent regmap\n");
return PTR_ERR(data->regmap);
}
platform_set_drvdata(pdev, data);
data->rcdev.owner = THIS_MODULE;
data->rcdev.nr_resets = 32;
data->rcdev.ops = &oxnas_reset_ops;
data->rcdev.of_node = pdev->dev.of_node;
return devm_reset_controller_register(&pdev->dev, &data->rcdev);
}
static struct platform_driver oxnas_reset_driver = {
.probe = oxnas_reset_probe,
.driver = {
.name = "oxnas-reset",
.of_match_table = oxnas_reset_dt_ids,
},
};
builtin_platform_driver(oxnas_reset_driver);