1 files changed, 88 insertions, 0 deletions
diff --git a/drivers/clk/meson/meson-aoclk.c b/drivers/clk/meson/meson-aoclk.c
new file mode 100644
index 000000000000..8f6bdea18119
--- /dev/null
+++ b/drivers/clk/meson/meson-aoclk.c
@@ -0,0 +1,88 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Amlogic Meson-AXG Clock Controller Driver
+ *
+ * Copyright (c) 2016 BayLibre, SAS.
+ * Author: Neil Armstrong <narmstrong@baylibre.com>
+ *
+ * Copyright (c) 2018 Amlogic, inc.
+ * Author: Qiufang Dai <qiufang.dai@amlogic.com>
+ * Author: Yixun Lan <yixun.lan@amlogic.com>
+ */
+
+#include <linux/platform_device.h>
+#include <linux/reset-controller.h>
+#include <linux/mfd/syscon.h>
+#include <linux/of.h>
+#include <linux/module.h>
+
+#include <linux/slab.h>
+#include "meson-aoclk.h"
+#include "clk-regmap.h"
+
+static int meson_aoclk_do_reset(struct reset_controller_dev *rcdev,
+			       unsigned long id)
+{
+	struct meson_aoclk_reset_controller *rstc =
+		container_of(rcdev, struct meson_aoclk_reset_controller, reset);
+
+	return regmap_write(rstc->regmap, rstc->data->reset_reg,
+			    BIT(rstc->data->reset[id]));
+}
+
+static const struct reset_control_ops meson_aoclk_reset_ops = {
+	.reset = meson_aoclk_do_reset,
+};
+
+int meson_aoclkc_probe(struct platform_device *pdev)
+{
+	struct meson_aoclk_reset_controller *rstc;
+	const struct meson_clkc_data *clkc_data;
+	const struct meson_aoclk_data *data;
+	struct device *dev = &pdev->dev;
+	struct device_node *np;
+	struct regmap *regmap;
+	int ret;
+
+	clkc_data = of_device_get_match_data(dev);
+	if (!clkc_data)
+		return -EINVAL;
+
+	ret = meson_clkc_syscon_probe(pdev);
+	if (ret)
+		return ret;
+
+	data = container_of(clkc_data, struct meson_aoclk_data,
+			    clkc_data);
+
+	rstc = devm_kzalloc(dev, sizeof(*rstc), GFP_KERNEL);
+	if (!rstc)
+		return -ENOMEM;
+
+	np = of_get_parent(dev->of_node);
+	regmap = syscon_node_to_regmap(np);
+	of_node_put(np);
+	if (IS_ERR(regmap)) {
+		dev_err(dev, "failed to get regmap\n");
+		return PTR_ERR(regmap);
+	}
+
+	/* Reset Controller */
+	rstc->data = data;
+	rstc->regmap = regmap;
+	rstc->reset.ops = &meson_aoclk_reset_ops;
+	rstc->reset.nr_resets = data->num_reset;
+	rstc->reset.of_node = dev->of_node;
+	ret = devm_reset_controller_register(dev, &rstc->reset);
+	if (ret) {
+		dev_err(dev, "failed to register reset controller\n");
+		return ret;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_NS_GPL(meson_aoclkc_probe, "CLK_MESON");
+
+MODULE_DESCRIPTION("Amlogic Always-ON Clock Controller helpers");
+MODULE_LICENSE("GPL");
+MODULE_IMPORT_NS("CLK_MESON");