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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/clk/mediatek/clk-mtk.c
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/clk/mediatek/clk-mtk.c')
-rw-r--r--drivers/clk/mediatek/clk-mtk.c504
1 files changed, 504 insertions, 0 deletions
diff --git a/drivers/clk/mediatek/clk-mtk.c b/drivers/clk/mediatek/clk-mtk.c
new file mode 100644
index 000000000..d31f01d0b
--- /dev/null
+++ b/drivers/clk/mediatek/clk-mtk.c
@@ -0,0 +1,504 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2014 MediaTek Inc.
+ * Author: James Liao <jamesjj.liao@mediatek.com>
+ */
+
+#include <linux/bitops.h>
+#include <linux/clk-provider.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+#include "clk-mtk.h"
+#include "clk-gate.h"
+
+static void mtk_init_clk_data(struct clk_hw_onecell_data *clk_data,
+ unsigned int clk_num)
+{
+ int i;
+
+ clk_data->num = clk_num;
+
+ for (i = 0; i < clk_num; i++)
+ clk_data->hws[i] = ERR_PTR(-ENOENT);
+}
+
+struct clk_hw_onecell_data *mtk_devm_alloc_clk_data(struct device *dev,
+ unsigned int clk_num)
+{
+ struct clk_hw_onecell_data *clk_data;
+
+ clk_data = devm_kzalloc(dev, struct_size(clk_data, hws, clk_num),
+ GFP_KERNEL);
+ if (!clk_data)
+ return NULL;
+
+ mtk_init_clk_data(clk_data, clk_num);
+
+ return clk_data;
+}
+EXPORT_SYMBOL_GPL(mtk_devm_alloc_clk_data);
+
+struct clk_hw_onecell_data *mtk_alloc_clk_data(unsigned int clk_num)
+{
+ struct clk_hw_onecell_data *clk_data;
+
+ clk_data = kzalloc(struct_size(clk_data, hws, clk_num), GFP_KERNEL);
+ if (!clk_data)
+ return NULL;
+
+ mtk_init_clk_data(clk_data, clk_num);
+
+ return clk_data;
+}
+EXPORT_SYMBOL_GPL(mtk_alloc_clk_data);
+
+void mtk_free_clk_data(struct clk_hw_onecell_data *clk_data)
+{
+ kfree(clk_data);
+}
+EXPORT_SYMBOL_GPL(mtk_free_clk_data);
+
+int mtk_clk_register_fixed_clks(const struct mtk_fixed_clk *clks, int num,
+ struct clk_hw_onecell_data *clk_data)
+{
+ int i;
+ struct clk_hw *hw;
+
+ if (!clk_data)
+ return -ENOMEM;
+
+ for (i = 0; i < num; i++) {
+ const struct mtk_fixed_clk *rc = &clks[i];
+
+ if (!IS_ERR_OR_NULL(clk_data->hws[rc->id])) {
+ pr_warn("Trying to register duplicate clock ID: %d\n", rc->id);
+ continue;
+ }
+
+ hw = clk_hw_register_fixed_rate(NULL, rc->name, rc->parent, 0,
+ rc->rate);
+
+ if (IS_ERR(hw)) {
+ pr_err("Failed to register clk %s: %pe\n", rc->name,
+ hw);
+ goto err;
+ }
+
+ clk_data->hws[rc->id] = hw;
+ }
+
+ return 0;
+
+err:
+ while (--i >= 0) {
+ const struct mtk_fixed_clk *rc = &clks[i];
+
+ if (IS_ERR_OR_NULL(clk_data->hws[rc->id]))
+ continue;
+
+ clk_hw_unregister_fixed_rate(clk_data->hws[rc->id]);
+ clk_data->hws[rc->id] = ERR_PTR(-ENOENT);
+ }
+
+ return PTR_ERR(hw);
+}
+EXPORT_SYMBOL_GPL(mtk_clk_register_fixed_clks);
+
+void mtk_clk_unregister_fixed_clks(const struct mtk_fixed_clk *clks, int num,
+ struct clk_hw_onecell_data *clk_data)
+{
+ int i;
+
+ if (!clk_data)
+ return;
+
+ for (i = num; i > 0; i--) {
+ const struct mtk_fixed_clk *rc = &clks[i - 1];
+
+ if (IS_ERR_OR_NULL(clk_data->hws[rc->id]))
+ continue;
+
+ clk_hw_unregister_fixed_rate(clk_data->hws[rc->id]);
+ clk_data->hws[rc->id] = ERR_PTR(-ENOENT);
+ }
+}
+EXPORT_SYMBOL_GPL(mtk_clk_unregister_fixed_clks);
+
+int mtk_clk_register_factors(const struct mtk_fixed_factor *clks, int num,
+ struct clk_hw_onecell_data *clk_data)
+{
+ int i;
+ struct clk_hw *hw;
+
+ if (!clk_data)
+ return -ENOMEM;
+
+ for (i = 0; i < num; i++) {
+ const struct mtk_fixed_factor *ff = &clks[i];
+
+ if (!IS_ERR_OR_NULL(clk_data->hws[ff->id])) {
+ pr_warn("Trying to register duplicate clock ID: %d\n", ff->id);
+ continue;
+ }
+
+ hw = clk_hw_register_fixed_factor(NULL, ff->name, ff->parent_name,
+ CLK_SET_RATE_PARENT, ff->mult, ff->div);
+
+ if (IS_ERR(hw)) {
+ pr_err("Failed to register clk %s: %pe\n", ff->name,
+ hw);
+ goto err;
+ }
+
+ clk_data->hws[ff->id] = hw;
+ }
+
+ return 0;
+
+err:
+ while (--i >= 0) {
+ const struct mtk_fixed_factor *ff = &clks[i];
+
+ if (IS_ERR_OR_NULL(clk_data->hws[ff->id]))
+ continue;
+
+ clk_hw_unregister_fixed_factor(clk_data->hws[ff->id]);
+ clk_data->hws[ff->id] = ERR_PTR(-ENOENT);
+ }
+
+ return PTR_ERR(hw);
+}
+EXPORT_SYMBOL_GPL(mtk_clk_register_factors);
+
+void mtk_clk_unregister_factors(const struct mtk_fixed_factor *clks, int num,
+ struct clk_hw_onecell_data *clk_data)
+{
+ int i;
+
+ if (!clk_data)
+ return;
+
+ for (i = num; i > 0; i--) {
+ const struct mtk_fixed_factor *ff = &clks[i - 1];
+
+ if (IS_ERR_OR_NULL(clk_data->hws[ff->id]))
+ continue;
+
+ clk_hw_unregister_fixed_factor(clk_data->hws[ff->id]);
+ clk_data->hws[ff->id] = ERR_PTR(-ENOENT);
+ }
+}
+EXPORT_SYMBOL_GPL(mtk_clk_unregister_factors);
+
+static struct clk_hw *mtk_clk_register_composite(const struct mtk_composite *mc,
+ void __iomem *base, spinlock_t *lock)
+{
+ struct clk_hw *hw;
+ struct clk_mux *mux = NULL;
+ struct clk_gate *gate = NULL;
+ struct clk_divider *div = NULL;
+ struct clk_hw *mux_hw = NULL, *gate_hw = NULL, *div_hw = NULL;
+ const struct clk_ops *mux_ops = NULL, *gate_ops = NULL, *div_ops = NULL;
+ const char * const *parent_names;
+ const char *parent;
+ int num_parents;
+ int ret;
+
+ if (mc->mux_shift >= 0) {
+ mux = kzalloc(sizeof(*mux), GFP_KERNEL);
+ if (!mux)
+ return ERR_PTR(-ENOMEM);
+
+ mux->reg = base + mc->mux_reg;
+ mux->mask = BIT(mc->mux_width) - 1;
+ mux->shift = mc->mux_shift;
+ mux->lock = lock;
+ mux->flags = mc->mux_flags;
+ mux_hw = &mux->hw;
+ mux_ops = &clk_mux_ops;
+
+ parent_names = mc->parent_names;
+ num_parents = mc->num_parents;
+ } else {
+ parent = mc->parent;
+ parent_names = &parent;
+ num_parents = 1;
+ }
+
+ if (mc->gate_shift >= 0) {
+ gate = kzalloc(sizeof(*gate), GFP_KERNEL);
+ if (!gate) {
+ ret = -ENOMEM;
+ goto err_out;
+ }
+
+ gate->reg = base + mc->gate_reg;
+ gate->bit_idx = mc->gate_shift;
+ gate->flags = CLK_GATE_SET_TO_DISABLE;
+ gate->lock = lock;
+
+ gate_hw = &gate->hw;
+ gate_ops = &clk_gate_ops;
+ }
+
+ if (mc->divider_shift >= 0) {
+ div = kzalloc(sizeof(*div), GFP_KERNEL);
+ if (!div) {
+ ret = -ENOMEM;
+ goto err_out;
+ }
+
+ div->reg = base + mc->divider_reg;
+ div->shift = mc->divider_shift;
+ div->width = mc->divider_width;
+ div->lock = lock;
+
+ div_hw = &div->hw;
+ div_ops = &clk_divider_ops;
+ }
+
+ hw = clk_hw_register_composite(NULL, mc->name, parent_names, num_parents,
+ mux_hw, mux_ops,
+ div_hw, div_ops,
+ gate_hw, gate_ops,
+ mc->flags);
+
+ if (IS_ERR(hw)) {
+ ret = PTR_ERR(hw);
+ goto err_out;
+ }
+
+ return hw;
+err_out:
+ kfree(div);
+ kfree(gate);
+ kfree(mux);
+
+ return ERR_PTR(ret);
+}
+
+static void mtk_clk_unregister_composite(struct clk_hw *hw)
+{
+ struct clk_composite *composite;
+ struct clk_mux *mux = NULL;
+ struct clk_gate *gate = NULL;
+ struct clk_divider *div = NULL;
+
+ if (!hw)
+ return;
+
+ composite = to_clk_composite(hw);
+ if (composite->mux_hw)
+ mux = to_clk_mux(composite->mux_hw);
+ if (composite->gate_hw)
+ gate = to_clk_gate(composite->gate_hw);
+ if (composite->rate_hw)
+ div = to_clk_divider(composite->rate_hw);
+
+ clk_hw_unregister_composite(hw);
+ kfree(div);
+ kfree(gate);
+ kfree(mux);
+}
+
+int mtk_clk_register_composites(const struct mtk_composite *mcs, int num,
+ void __iomem *base, spinlock_t *lock,
+ struct clk_hw_onecell_data *clk_data)
+{
+ struct clk_hw *hw;
+ int i;
+
+ if (!clk_data)
+ return -ENOMEM;
+
+ for (i = 0; i < num; i++) {
+ const struct mtk_composite *mc = &mcs[i];
+
+ if (!IS_ERR_OR_NULL(clk_data->hws[mc->id])) {
+ pr_warn("Trying to register duplicate clock ID: %d\n",
+ mc->id);
+ continue;
+ }
+
+ hw = mtk_clk_register_composite(mc, base, lock);
+
+ if (IS_ERR(hw)) {
+ pr_err("Failed to register clk %s: %pe\n", mc->name,
+ hw);
+ goto err;
+ }
+
+ clk_data->hws[mc->id] = hw;
+ }
+
+ return 0;
+
+err:
+ while (--i >= 0) {
+ const struct mtk_composite *mc = &mcs[i];
+
+ if (IS_ERR_OR_NULL(clk_data->hws[mcs->id]))
+ continue;
+
+ mtk_clk_unregister_composite(clk_data->hws[mc->id]);
+ clk_data->hws[mc->id] = ERR_PTR(-ENOENT);
+ }
+
+ return PTR_ERR(hw);
+}
+EXPORT_SYMBOL_GPL(mtk_clk_register_composites);
+
+void mtk_clk_unregister_composites(const struct mtk_composite *mcs, int num,
+ struct clk_hw_onecell_data *clk_data)
+{
+ int i;
+
+ if (!clk_data)
+ return;
+
+ for (i = num; i > 0; i--) {
+ const struct mtk_composite *mc = &mcs[i - 1];
+
+ if (IS_ERR_OR_NULL(clk_data->hws[mc->id]))
+ continue;
+
+ mtk_clk_unregister_composite(clk_data->hws[mc->id]);
+ clk_data->hws[mc->id] = ERR_PTR(-ENOENT);
+ }
+}
+EXPORT_SYMBOL_GPL(mtk_clk_unregister_composites);
+
+int mtk_clk_register_dividers(const struct mtk_clk_divider *mcds, int num,
+ void __iomem *base, spinlock_t *lock,
+ struct clk_hw_onecell_data *clk_data)
+{
+ struct clk_hw *hw;
+ int i;
+
+ if (!clk_data)
+ return -ENOMEM;
+
+ for (i = 0; i < num; i++) {
+ const struct mtk_clk_divider *mcd = &mcds[i];
+
+ if (!IS_ERR_OR_NULL(clk_data->hws[mcd->id])) {
+ pr_warn("Trying to register duplicate clock ID: %d\n",
+ mcd->id);
+ continue;
+ }
+
+ hw = clk_hw_register_divider(NULL, mcd->name, mcd->parent_name,
+ mcd->flags, base + mcd->div_reg, mcd->div_shift,
+ mcd->div_width, mcd->clk_divider_flags, lock);
+
+ if (IS_ERR(hw)) {
+ pr_err("Failed to register clk %s: %pe\n", mcd->name,
+ hw);
+ goto err;
+ }
+
+ clk_data->hws[mcd->id] = hw;
+ }
+
+ return 0;
+
+err:
+ while (--i >= 0) {
+ const struct mtk_clk_divider *mcd = &mcds[i];
+
+ if (IS_ERR_OR_NULL(clk_data->hws[mcd->id]))
+ continue;
+
+ clk_hw_unregister_divider(clk_data->hws[mcd->id]);
+ clk_data->hws[mcd->id] = ERR_PTR(-ENOENT);
+ }
+
+ return PTR_ERR(hw);
+}
+EXPORT_SYMBOL_GPL(mtk_clk_register_dividers);
+
+void mtk_clk_unregister_dividers(const struct mtk_clk_divider *mcds, int num,
+ struct clk_hw_onecell_data *clk_data)
+{
+ int i;
+
+ if (!clk_data)
+ return;
+
+ for (i = num; i > 0; i--) {
+ const struct mtk_clk_divider *mcd = &mcds[i - 1];
+
+ if (IS_ERR_OR_NULL(clk_data->hws[mcd->id]))
+ continue;
+
+ clk_hw_unregister_divider(clk_data->hws[mcd->id]);
+ clk_data->hws[mcd->id] = ERR_PTR(-ENOENT);
+ }
+}
+EXPORT_SYMBOL_GPL(mtk_clk_unregister_dividers);
+
+int mtk_clk_simple_probe(struct platform_device *pdev)
+{
+ const struct mtk_clk_desc *mcd;
+ struct clk_hw_onecell_data *clk_data;
+ struct device_node *node = pdev->dev.of_node;
+ int r;
+
+ mcd = of_device_get_match_data(&pdev->dev);
+ if (!mcd)
+ return -EINVAL;
+
+ clk_data = mtk_alloc_clk_data(mcd->num_clks);
+ if (!clk_data)
+ return -ENOMEM;
+
+ r = mtk_clk_register_gates_with_dev(node, mcd->clks, mcd->num_clks,
+ clk_data, &pdev->dev);
+ if (r)
+ goto free_data;
+
+ r = of_clk_add_hw_provider(node, of_clk_hw_onecell_get, clk_data);
+ if (r)
+ goto unregister_clks;
+
+ platform_set_drvdata(pdev, clk_data);
+
+ if (mcd->rst_desc) {
+ r = mtk_register_reset_controller_with_dev(&pdev->dev,
+ mcd->rst_desc);
+ if (r)
+ goto unregister_clks;
+ }
+
+ return r;
+
+unregister_clks:
+ mtk_clk_unregister_gates(mcd->clks, mcd->num_clks, clk_data);
+free_data:
+ mtk_free_clk_data(clk_data);
+ return r;
+}
+EXPORT_SYMBOL_GPL(mtk_clk_simple_probe);
+
+int mtk_clk_simple_remove(struct platform_device *pdev)
+{
+ const struct mtk_clk_desc *mcd = of_device_get_match_data(&pdev->dev);
+ struct clk_hw_onecell_data *clk_data = platform_get_drvdata(pdev);
+ struct device_node *node = pdev->dev.of_node;
+
+ of_clk_del_provider(node);
+ mtk_clk_unregister_gates(mcd->clks, mcd->num_clks, clk_data);
+ mtk_free_clk_data(clk_data);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(mtk_clk_simple_remove);
+
+MODULE_LICENSE("GPL");