[PATCH RFC 17/20] reset: oxnas: remove obsolete reset driver

[Neil Armstrong <neil.armstrong@linaro.org>]

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>
---
 .../devicetree/bindings/reset/oxnas,reset.txt      |  32 ------
 drivers/reset/Kconfig                              |   3 -
 drivers/reset/Makefile                             |   1 -
 drivers/reset/reset-oxnas.c                        | 114 ---------------------
 4 files changed, 150 deletions(-)

diff --git a/Documentation/devicetree/bindings/reset/oxnas,reset.txt b/Documentation/devicetree/bindings/reset/oxnas,reset.txt
deleted file mode 100644
index d27ccb5d04fc..000000000000
--- a/Documentation/devicetree/bindings/reset/oxnas,reset.txt
+++ /dev/null
@@ -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>;
-	};
-};
diff --git a/drivers/reset/Kconfig b/drivers/reset/Kconfig
index 2a52c990d4fe..695419d888ab 100644
--- a/drivers/reset/Kconfig
+++ b/drivers/reset/Kconfig
@@ -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
diff --git a/drivers/reset/Makefile b/drivers/reset/Makefile
index 3e7e5fd633a8..cb1f229e20a6 100644
--- a/drivers/reset/Makefile
+++ b/drivers/reset/Makefile
@@ -20,7 +20,6 @@ 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
diff --git a/drivers/reset/reset-oxnas.c b/drivers/reset/reset-oxnas.c
deleted file mode 100644
index 8209f922dc16..000000000000
--- a/drivers/reset/reset-oxnas.c
+++ /dev/null
@@ -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);

-- 
2.34.1