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2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c 
 kernel/drivers/reset/reset-meson.c
....@@ -1,75 +1,31 @@
1
+// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
12 /*
23  * Amlogic Meson Reset Controller driver
34  *
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- * This file is provided under a dual BSD/GPLv2 license.  When using or
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- * redistributing this file, you may do so under either license.
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- *
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- * GPL LICENSE SUMMARY
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- *
95  * Copyright (c) 2016 BayLibre, SAS.
106  * Author: Neil Armstrong <narmstrong@baylibre.com>
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of version 2 of the GNU General Public License as
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- * published by the Free Software Foundation.
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- *
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- * This program is distributed in the hope that it will be useful, but
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- * WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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- * General Public License for more details.
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- *
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- * You should have received a copy of the GNU General Public License
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- * along with this program; if not, see <http://www.gnu.org/licenses/>.
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- * The full GNU General Public License is included in this distribution
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- * in the file called COPYING.
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- *
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- * BSD LICENSE
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- *
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- * Copyright (c) 2016 BayLibre, SAS.
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- * Author: Neil Armstrong <narmstrong@baylibre.com>
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- *
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- * Redistribution and use in source and binary forms, with or without
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- * modification, are permitted provided that the following conditions
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- * are met:
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- *
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- *   * Redistributions of source code must retain the above copyright
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- *     notice, this list of conditions and the following disclaimer.
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- *   * Redistributions in binary form must reproduce the above copyright
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- *     notice, this list of conditions and the following disclaimer in
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- *     the documentation and/or other materials provided with the
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- *     distribution.
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- *   * Neither the name of Intel Corporation nor the names of its
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- *     contributors may be used to endorse or promote products derived
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- *     from this software without specific prior written permission.
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- *
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- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
567  */
578 #include <linux/err.h>
589 #include <linux/init.h>
5910 #include <linux/io.h>
6011 #include <linux/of.h>
12
+#include <linux/module.h>
6113 #include <linux/platform_device.h>
6214 #include <linux/reset-controller.h>
6315 #include <linux/slab.h>
6416 #include <linux/types.h>
6517 #include <linux/of_device.h>
6618 
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-#define REG_COUNT	8
6819 #define BITS_PER_REG	32
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-#define LEVEL_OFFSET	0x7c
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+
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+struct meson_reset_param {
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+	int reg_count;
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+	int level_offset;
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+};
7025 
7126 struct meson_reset {
7227 	void __iomem *reg_base;
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+	const struct meson_reset_param *param;
7329 	struct reset_controller_dev rcdev;
7430 	spinlock_t lock;
7531 };
....@@ -95,9 +51,11 @@
9551 		container_of(rcdev, struct meson_reset, rcdev);
9652 	unsigned int bank = id / BITS_PER_REG;
9753 	unsigned int offset = id % BITS_PER_REG;
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-	void __iomem *reg_addr = data->reg_base + LEVEL_OFFSET + (bank << 2);
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+	void __iomem *reg_addr;
9955 	unsigned long flags;
10056 	u32 reg;
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+
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+	reg_addr = data->reg_base + data->param->level_offset + (bank << 2);
10159 
10260 	spin_lock_irqsave(&data->lock, flags);
10361 
....@@ -130,12 +88,24 @@
13088 	.deassert	= meson_reset_deassert,
13189 };
13290 
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+static const struct meson_reset_param meson8b_param = {
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+	.reg_count	= 8,
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+	.level_offset	= 0x7c,
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+};
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+
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+static const struct meson_reset_param meson_a1_param = {
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+	.reg_count	= 3,
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+	.level_offset	= 0x40,
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+};
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+
133101 static const struct of_device_id meson_reset_dt_ids[] = {
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-	 { .compatible = "amlogic,meson8b-reset" },
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-	 { .compatible = "amlogic,meson-gxbb-reset" },
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-	 { .compatible = "amlogic,meson-axg-reset" },
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+	 { .compatible = "amlogic,meson8b-reset",    .data = &meson8b_param},
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+	 { .compatible = "amlogic,meson-gxbb-reset", .data = &meson8b_param},
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+	 { .compatible = "amlogic,meson-axg-reset",  .data = &meson8b_param},
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+	 { .compatible = "amlogic,meson-a1-reset",   .data = &meson_a1_param},
137106 	 { /* sentinel */ },
138107 };
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+MODULE_DEVICE_TABLE(of, meson_reset_dt_ids);
139109 
140110 static int meson_reset_probe(struct platform_device *pdev)
141111 {
....@@ -151,12 +121,16 @@
151121 	if (IS_ERR(data->reg_base))
152122 		return PTR_ERR(data->reg_base);
153123 
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+	data->param = of_device_get_match_data(&pdev->dev);
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+	if (!data->param)
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+		return -ENODEV;
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+
154128 	platform_set_drvdata(pdev, data);
155129 
156130 	spin_lock_init(&data->lock);
157131 
158132 	data->rcdev.owner = THIS_MODULE;
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-	data->rcdev.nr_resets = REG_COUNT * BITS_PER_REG;
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+	data->rcdev.nr_resets = data->param->reg_count * BITS_PER_REG;
160134 	data->rcdev.ops = &meson_reset_ops;
161135 	data->rcdev.of_node = pdev->dev.of_node;
162136 
....@@ -170,4 +144,8 @@
170144 		.of_match_table	= meson_reset_dt_ids,
171145 	},
172146 };
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-builtin_platform_driver(meson_reset_driver);
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+module_platform_driver(meson_reset_driver);
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+
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+MODULE_DESCRIPTION("Amlogic Meson Reset Controller driver");
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+MODULE_AUTHOR("Neil Armstrong <narmstrong@baylibre.com>");
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+MODULE_LICENSE("Dual BSD/GPL");