1 files changed, 93 insertions, 0 deletions
diff --git a/drivers/clk/meson/meson-aoclk.c b/drivers/clk/meson/meson-aoclk.c
new file mode 100644
index 000000000..434cd8f9d
--- /dev/null
+++ b/drivers/clk/meson/meson-aoclk.c
@@ -0,0 +1,93 @@
+// 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_device.h>
+#include <linux/module.h>
+
+#include <linux/slab.h>
+#include "meson-aoclk.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;
+	struct meson_aoclk_data *data;
+	struct device *dev = &pdev->dev;
+	struct device_node *np;
+	struct regmap *regmap;
+	int ret, clkid;
+
+	data = (struct meson_aoclk_data *) of_device_get_match_data(dev);
+	if (!data)
+		return -ENODEV;
+
+	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;
+	}
+
+	/* Populate regmap */
+	for (clkid = 0; clkid < data->num_clks; clkid++)
+		data->clks[clkid]->map = regmap;
+
+	/* Register all clks */
+	for (clkid = 0; clkid < data->hw_data->num; clkid++) {
+		if (!data->hw_data->hws[clkid])
+			continue;
+
+		ret = devm_clk_hw_register(dev, data->hw_data->hws[clkid]);
+		if (ret) {
+			dev_err(dev, "Clock registration failed\n");
+			return ret;
+		}
+	}
+
+	return devm_of_clk_add_hw_provider(dev, of_clk_hw_onecell_get,
+		(void *) data->hw_data);
+}
+EXPORT_SYMBOL_GPL(meson_aoclkc_probe);
+MODULE_LICENSE("GPL v2");