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-rw-r--r--drivers/reset/amlogic/reset-meson.c105
1 files changed, 105 insertions, 0 deletions
diff --git a/drivers/reset/amlogic/reset-meson.c b/drivers/reset/amlogic/reset-meson.c
new file mode 100644
index 000000000000..6ae4ed6b7f8b
--- /dev/null
+++ b/drivers/reset/amlogic/reset-meson.c
@@ -0,0 +1,105 @@
+// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
+/*
+ * Amlogic Meson Reset Controller driver
+ *
+ * Copyright (c) 2016-2024 BayLibre, SAS.
+ * Authors: Neil Armstrong <narmstrong@baylibre.com>
+ * Jerome Brunet <jbrunet@baylibre.com>
+ */
+
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/reset-controller.h>
+
+#include "reset-meson.h"
+
+static const struct meson_reset_param meson8b_param = {
+ .reset_ops = &meson_reset_ops,
+ .reset_num = 256,
+ .reset_offset = 0x0,
+ .level_offset = 0x7c,
+ .level_low_reset = true,
+};
+
+static const struct meson_reset_param meson_a1_param = {
+ .reset_ops = &meson_reset_ops,
+ .reset_num = 96,
+ .reset_offset = 0x0,
+ .level_offset = 0x40,
+ .level_low_reset = true,
+};
+
+static const struct meson_reset_param meson_s4_param = {
+ .reset_ops = &meson_reset_ops,
+ .reset_num = 192,
+ .reset_offset = 0x0,
+ .level_offset = 0x40,
+ .level_low_reset = true,
+};
+
+static const struct meson_reset_param t7_param = {
+ .reset_num = 224,
+ .reset_offset = 0x0,
+ .level_offset = 0x40,
+ .level_low_reset = true,
+};
+
+static const struct of_device_id meson_reset_dt_ids[] = {
+ { .compatible = "amlogic,meson8b-reset", .data = &meson8b_param},
+ { .compatible = "amlogic,meson-gxbb-reset", .data = &meson8b_param},
+ { .compatible = "amlogic,meson-axg-reset", .data = &meson8b_param},
+ { .compatible = "amlogic,meson-a1-reset", .data = &meson_a1_param},
+ { .compatible = "amlogic,meson-s4-reset", .data = &meson_s4_param},
+ { .compatible = "amlogic,c3-reset", .data = &meson_s4_param},
+ { .compatible = "amlogic,t7-reset", .data = &t7_param},
+ { /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, meson_reset_dt_ids);
+
+static const struct regmap_config regmap_config = {
+ .reg_bits = 32,
+ .val_bits = 32,
+ .reg_stride = 4,
+};
+
+static int meson_reset_probe(struct platform_device *pdev)
+{
+ const struct meson_reset_param *param;
+ struct device *dev = &pdev->dev;
+ struct regmap *map;
+ void __iomem *base;
+
+ base = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(base))
+ return PTR_ERR(base);
+
+ param = device_get_match_data(dev);
+ if (!param)
+ return -ENODEV;
+
+ map = devm_regmap_init_mmio(dev, base, &regmap_config);
+ if (IS_ERR(map))
+ return dev_err_probe(dev, PTR_ERR(map),
+ "can't init regmap mmio region\n");
+
+ return meson_reset_controller_register(dev, map, param);
+}
+
+static struct platform_driver meson_reset_driver = {
+ .probe = meson_reset_probe,
+ .driver = {
+ .name = "meson_reset",
+ .of_match_table = meson_reset_dt_ids,
+ },
+};
+module_platform_driver(meson_reset_driver);
+
+MODULE_DESCRIPTION("Amlogic Meson Reset Controller driver");
+MODULE_AUTHOR("Neil Armstrong <narmstrong@baylibre.com>");
+MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_IMPORT_NS(MESON_RESET);