[Feature] add GA346 baseline version
Change-Id: Ic62933698569507dcf98240cdf5d9931ae34348f
diff --git a/src/kernel/linux/v4.19/drivers/clk/clk-fixed-rate.c b/src/kernel/linux/v4.19/drivers/clk/clk-fixed-rate.c
new file mode 100644
index 0000000..6d6475c
--- /dev/null
+++ b/src/kernel/linux/v4.19/drivers/clk/clk-fixed-rate.c
@@ -0,0 +1,241 @@
+/*
+ * Copyright (C) 2010-2011 Canonical Ltd <jeremy.kerr@canonical.com>
+ * Copyright (C) 2011-2012 Mike Turquette, Linaro Ltd <mturquette@linaro.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Fixed rate clock implementation
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/io.h>
+#include <linux/err.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+
+/*
+ * DOC: basic fixed-rate clock that cannot gate
+ *
+ * Traits of this clock:
+ * prepare - clk_(un)prepare only ensures parents are prepared
+ * enable - clk_enable only ensures parents are enabled
+ * rate - rate is always a fixed value. No clk_set_rate support
+ * parent - fixed parent. No clk_set_parent support
+ */
+
+static unsigned long clk_fixed_rate_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ return to_clk_fixed_rate(hw)->fixed_rate;
+}
+
+static unsigned long clk_fixed_rate_recalc_accuracy(struct clk_hw *hw,
+ unsigned long parent_accuracy)
+{
+ return to_clk_fixed_rate(hw)->fixed_accuracy;
+}
+
+const struct clk_ops clk_fixed_rate_ops = {
+ .recalc_rate = clk_fixed_rate_recalc_rate,
+ .recalc_accuracy = clk_fixed_rate_recalc_accuracy,
+};
+EXPORT_SYMBOL_GPL(clk_fixed_rate_ops);
+
+/**
+ * clk_hw_register_fixed_rate_with_accuracy - register fixed-rate clock with
+ * the clock framework
+ * @dev: device that is registering this clock
+ * @name: name of this clock
+ * @parent_name: name of clock's parent
+ * @flags: framework-specific flags
+ * @fixed_rate: non-adjustable clock rate
+ * @fixed_accuracy: non-adjustable clock rate
+ */
+struct clk_hw *clk_hw_register_fixed_rate_with_accuracy(struct device *dev,
+ const char *name, const char *parent_name, unsigned long flags,
+ unsigned long fixed_rate, unsigned long fixed_accuracy)
+{
+ struct clk_fixed_rate *fixed;
+ struct clk_hw *hw;
+ struct clk_init_data init;
+ int ret;
+
+ /* allocate fixed-rate clock */
+ fixed = kzalloc(sizeof(*fixed), GFP_KERNEL);
+ if (!fixed)
+ return ERR_PTR(-ENOMEM);
+
+ init.name = name;
+ init.ops = &clk_fixed_rate_ops;
+ init.flags = flags | CLK_IS_BASIC;
+ init.parent_names = (parent_name ? &parent_name: NULL);
+ init.num_parents = (parent_name ? 1 : 0);
+
+ /* struct clk_fixed_rate assignments */
+ fixed->fixed_rate = fixed_rate;
+ fixed->fixed_accuracy = fixed_accuracy;
+ fixed->hw.init = &init;
+
+ /* register the clock */
+ hw = &fixed->hw;
+ ret = clk_hw_register(dev, hw);
+ if (ret) {
+ kfree(fixed);
+ hw = ERR_PTR(ret);
+ }
+
+ return hw;
+}
+EXPORT_SYMBOL_GPL(clk_hw_register_fixed_rate_with_accuracy);
+
+struct clk *clk_register_fixed_rate_with_accuracy(struct device *dev,
+ const char *name, const char *parent_name, unsigned long flags,
+ unsigned long fixed_rate, unsigned long fixed_accuracy)
+{
+ struct clk_hw *hw;
+
+ hw = clk_hw_register_fixed_rate_with_accuracy(dev, name, parent_name,
+ flags, fixed_rate, fixed_accuracy);
+ if (IS_ERR(hw))
+ return ERR_CAST(hw);
+ return hw->clk;
+}
+EXPORT_SYMBOL_GPL(clk_register_fixed_rate_with_accuracy);
+
+/**
+ * clk_hw_register_fixed_rate - register fixed-rate clock with the clock
+ * framework
+ * @dev: device that is registering this clock
+ * @name: name of this clock
+ * @parent_name: name of clock's parent
+ * @flags: framework-specific flags
+ * @fixed_rate: non-adjustable clock rate
+ */
+struct clk_hw *clk_hw_register_fixed_rate(struct device *dev, const char *name,
+ const char *parent_name, unsigned long flags,
+ unsigned long fixed_rate)
+{
+ return clk_hw_register_fixed_rate_with_accuracy(dev, name, parent_name,
+ flags, fixed_rate, 0);
+}
+EXPORT_SYMBOL_GPL(clk_hw_register_fixed_rate);
+
+struct clk *clk_register_fixed_rate(struct device *dev, const char *name,
+ const char *parent_name, unsigned long flags,
+ unsigned long fixed_rate)
+{
+ return clk_register_fixed_rate_with_accuracy(dev, name, parent_name,
+ flags, fixed_rate, 0);
+}
+EXPORT_SYMBOL_GPL(clk_register_fixed_rate);
+
+void clk_unregister_fixed_rate(struct clk *clk)
+{
+ struct clk_hw *hw;
+
+ hw = __clk_get_hw(clk);
+ if (!hw)
+ return;
+
+ clk_unregister(clk);
+ kfree(to_clk_fixed_rate(hw));
+}
+EXPORT_SYMBOL_GPL(clk_unregister_fixed_rate);
+
+void clk_hw_unregister_fixed_rate(struct clk_hw *hw)
+{
+ struct clk_fixed_rate *fixed;
+
+ fixed = to_clk_fixed_rate(hw);
+
+ clk_hw_unregister(hw);
+ kfree(fixed);
+}
+EXPORT_SYMBOL_GPL(clk_hw_unregister_fixed_rate);
+
+#ifdef CONFIG_OF
+static struct clk *_of_fixed_clk_setup(struct device_node *node)
+{
+ struct clk *clk;
+ const char *clk_name = node->name;
+ u32 rate;
+ u32 accuracy = 0;
+ int ret;
+
+ if (of_property_read_u32(node, "clock-frequency", &rate))
+ return ERR_PTR(-EIO);
+
+ of_property_read_u32(node, "clock-accuracy", &accuracy);
+
+ of_property_read_string(node, "clock-output-names", &clk_name);
+
+ clk = clk_register_fixed_rate_with_accuracy(NULL, clk_name, NULL,
+ 0, rate, accuracy);
+ if (IS_ERR(clk))
+ return clk;
+
+ ret = of_clk_add_provider(node, of_clk_src_simple_get, clk);
+ if (ret) {
+ clk_unregister(clk);
+ return ERR_PTR(ret);
+ }
+
+ return clk;
+}
+
+/**
+ * of_fixed_clk_setup() - Setup function for simple fixed rate clock
+ */
+void __init of_fixed_clk_setup(struct device_node *node)
+{
+ _of_fixed_clk_setup(node);
+}
+CLK_OF_DECLARE(fixed_clk, "fixed-clock", of_fixed_clk_setup);
+
+static int of_fixed_clk_remove(struct platform_device *pdev)
+{
+ struct clk *clk = platform_get_drvdata(pdev);
+
+ of_clk_del_provider(pdev->dev.of_node);
+ clk_unregister_fixed_rate(clk);
+
+ return 0;
+}
+
+static int of_fixed_clk_probe(struct platform_device *pdev)
+{
+ struct clk *clk;
+
+ /*
+ * This function is not executed when of_fixed_clk_setup
+ * succeeded.
+ */
+ clk = _of_fixed_clk_setup(pdev->dev.of_node);
+ if (IS_ERR(clk))
+ return PTR_ERR(clk);
+
+ platform_set_drvdata(pdev, clk);
+
+ return 0;
+}
+
+static const struct of_device_id of_fixed_clk_ids[] = {
+ { .compatible = "fixed-clock" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, of_fixed_clk_ids);
+
+static struct platform_driver of_fixed_clk_driver = {
+ .driver = {
+ .name = "of_fixed_clk",
+ .of_match_table = of_fixed_clk_ids,
+ },
+ .probe = of_fixed_clk_probe,
+ .remove = of_fixed_clk_remove,
+};
+builtin_platform_driver(of_fixed_clk_driver);
+#endif