1 files changed, 9 insertions, 105 deletions

diff --git a/drivers/reset/reset-sunxi.c b/drivers/reset/reset-sunxi.c
index cd585cd2f04d..e752594b6971 100644
--- a/drivers/reset/reset-sunxi.c
+++ b/drivers/reset/reset-sunxi.c
@@ -1,14 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Allwinner SoCs Reset Controller driver
  *
  * Copyright 2013 Maxime Ripard
  *
  * Maxime Ripard <maxime.ripard@free-electrons.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
  */
 
 #include <linux/err.h>
@@ -18,68 +14,15 @@
 #include <linux/of_address.h>
 #include <linux/platform_device.h>
 #include <linux/reset-controller.h>
+#include <linux/reset/reset-simple.h>
+#include <linux/reset/sunxi.h>
 #include <linux/slab.h>
 #include <linux/spinlock.h>
 #include <linux/types.h>
 
-struct sunxi_reset_data {
-	spinlock_t			lock;
-	void __iomem			*membase;
-	struct reset_controller_dev	rcdev;
-};
-
-static int sunxi_reset_assert(struct reset_controller_dev *rcdev,
-			      unsigned long id)
-{
-	struct sunxi_reset_data *data = container_of(rcdev,
-						     struct sunxi_reset_data,
-						     rcdev);
-	int reg_width = sizeof(u32);
-	int bank = id / (reg_width * BITS_PER_BYTE);
-	int offset = id % (reg_width * BITS_PER_BYTE);
-	unsigned long flags;
-	u32 reg;
-
-	spin_lock_irqsave(&data->lock, flags);
-
-	reg = readl(data->membase + (bank * reg_width));
-	writel(reg & ~BIT(offset), data->membase + (bank * reg_width));
-
-	spin_unlock_irqrestore(&data->lock, flags);
-
-	return 0;
-}
-
-static int sunxi_reset_deassert(struct reset_controller_dev *rcdev,
-				unsigned long id)
-{
-	struct sunxi_reset_data *data = container_of(rcdev,
-						     struct sunxi_reset_data,
-						     rcdev);
-	int reg_width = sizeof(u32);
-	int bank = id / (reg_width * BITS_PER_BYTE);
-	int offset = id % (reg_width * BITS_PER_BYTE);
-	unsigned long flags;
-	u32 reg;
-
-	spin_lock_irqsave(&data->lock, flags);
-
-	reg = readl(data->membase + (bank * reg_width));
-	writel(reg | BIT(offset), data->membase + (bank * reg_width));
-
-	spin_unlock_irqrestore(&data->lock, flags);
-
-	return 0;
-}
-
-static const struct reset_control_ops sunxi_reset_ops = {
-	.assert		= sunxi_reset_assert,
-	.deassert	= sunxi_reset_deassert,
-};
-
 static int sunxi_reset_init(struct device_node *np)
 {
-	struct sunxi_reset_data *data;
+	struct reset_simple_data *data;
 	struct resource res;
 	resource_size_t size;
 	int ret;
@@ -107,9 +50,10 @@ static int sunxi_reset_init(struct device_node *np)
 	spin_lock_init(&data->lock);
 
 	data->rcdev.owner = THIS_MODULE;
-	data->rcdev.nr_resets = size * 32;
-	data->rcdev.ops = &sunxi_reset_ops;
+	data->rcdev.nr_resets = size * 8;
+	data->rcdev.ops = &reset_simple_ops;
 	data->rcdev.of_node = np;
+	data->active_low = true;
 
 	return reset_controller_register(&data->rcdev);
 
@@ -122,6 +66,8 @@ err_alloc:
  * These are the reset controller we need to initialize early on in
  * our system, before we can even think of using a regular device
  * driver for it.
+ * The controllers that we can register through the regular device
+ * model are handled by the simple reset driver directly.
  */
 static const struct of_device_id sunxi_early_reset_dt_ids[] __initconst = {
 	{ .compatible = "allwinner,sun6i-a31-ahb1-reset", },
@@ -135,45 +81,3 @@ void __init sun6i_reset_init(void)
 	for_each_matching_node(np, sunxi_early_reset_dt_ids)
 		sunxi_reset_init(np);
 }
-
-/*
- * And these are the controllers we can register through the regular
- * device model.
- */
-static const struct of_device_id sunxi_reset_dt_ids[] = {
-	 { .compatible = "allwinner,sun6i-a31-clock-reset", },
-	 { /* sentinel */ },
-};
-
-static int sunxi_reset_probe(struct platform_device *pdev)
-{
-	struct sunxi_reset_data *data;
-	struct resource *res;
-
-	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
-	if (!data)
-		return -ENOMEM;
-
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	data->membase = devm_ioremap_resource(&pdev->dev, res);
-	if (IS_ERR(data->membase))
-		return PTR_ERR(data->membase);
-
-	spin_lock_init(&data->lock);
-
-	data->rcdev.owner = THIS_MODULE;
-	data->rcdev.nr_resets = resource_size(res) * 32;
-	data->rcdev.ops = &sunxi_reset_ops;
-	data->rcdev.of_node = pdev->dev.of_node;
-
-	return devm_reset_controller_register(&pdev->dev, &data->rcdev);
-}
-
-static struct platform_driver sunxi_reset_driver = {
-	.probe	= sunxi_reset_probe,
-	.driver = {
-		.name		= "sunxi-reset",
-		.of_match_table	= sunxi_reset_dt_ids,
-	},
-};
-builtin_platform_driver(sunxi_reset_driver);