#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_address.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/slab.h>
#include "clk-mtk.h"
#include "clk-gate.h"
#include "clk-mux.h"
const struct mtk_gate_regs cg_regs_dummy = { 0, 0, 0 };
EXPORT_SYMBOL_GPL(cg_regs_dummy);
static int mtk_clk_dummy_enable(struct clk_hw *hw)
{
return 0;
}
static void mtk_clk_dummy_disable(struct clk_hw *hw) { }
const struct clk_ops mtk_clk_dummy_ops = {
.enable = mtk_clk_dummy_enable,
.disable = mtk_clk_dummy_disable,
};
EXPORT_SYMBOL_GPL(mtk_clk_dummy_ops);
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_flex(*clk_data, hws, clk_num);
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,
ff->flags, 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(struct device *dev,
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_obj(*mux);
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_obj(*gate);
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_obj(*div);
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(dev, 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(struct device *dev,
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(dev, 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(struct device *dev,
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(dev, 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);
static int __mtk_clk_simple_probe(struct platform_device *pdev,
struct device_node *node)
{
const struct platform_device_id *id;
const struct mtk_clk_desc *mcd;
struct clk_hw_onecell_data *clk_data;
void __iomem *base = NULL;
int num_clks, r;
mcd = device_get_match_data(&pdev->dev);
if (!mcd) {
id = platform_get_device_id(pdev);
if (id)
mcd = (const struct mtk_clk_desc *)id->driver_data;
if (!mcd)
return -EINVAL;
}
if (mcd->composite_clks || mcd->divider_clks) {
if (!mcd->shared_io)
base = devm_platform_ioremap_resource(pdev, 0);
else
base = of_iomap(node, 0);
if (IS_ERR_OR_NULL(base))
return IS_ERR(base) ? PTR_ERR(base) : -ENOMEM;
}
if (mcd->need_runtime_pm) {
r = devm_pm_runtime_enable(&pdev->dev);
if (r)
goto unmap_io;
r = pm_runtime_resume_and_get(&pdev->dev);
if (r)
goto unmap_io;
}
num_clks = mcd->num_clks + mcd->num_composite_clks;
num_clks += mcd->num_fixed_clks + mcd->num_factor_clks;
num_clks += mcd->num_mux_clks + mcd->num_divider_clks;
clk_data = mtk_alloc_clk_data(num_clks);
if (!clk_data) {
r = -ENOMEM;
goto free_base;
}
if (mcd->fixed_clks) {
r = mtk_clk_register_fixed_clks(mcd->fixed_clks,
mcd->num_fixed_clks, clk_data);
if (r)
goto free_data;
}
if (mcd->factor_clks) {
r = mtk_clk_register_factors(mcd->factor_clks,
mcd->num_factor_clks, clk_data);
if (r)
goto unregister_fixed_clks;
}
if (mcd->mux_clks) {
r = mtk_clk_register_muxes(&pdev->dev, mcd->mux_clks,
mcd->num_mux_clks, node,
mcd->clk_lock, clk_data);
if (r)
goto unregister_factors;
}
if (mcd->composite_clks) {
r = mtk_clk_register_composites(&pdev->dev,
mcd->composite_clks,
mcd->num_composite_clks,
base, mcd->clk_lock, clk_data);
if (r)
goto unregister_muxes;
}
if (mcd->divider_clks) {
r = mtk_clk_register_dividers(&pdev->dev,
mcd->divider_clks,
mcd->num_divider_clks,
base, mcd->clk_lock, clk_data);
if (r)
goto unregister_composites;
}
if (mcd->clks) {
r = mtk_clk_register_gates(&pdev->dev, node, mcd->clks,
mcd->num_clks, clk_data);
if (r)
goto unregister_dividers;
}
if (mcd->clk_notifier_func) {
struct clk *mfg_mux = clk_data->hws[mcd->mfg_clk_idx]->clk;
r = mcd->clk_notifier_func(&pdev->dev, mfg_mux);
if (r)
goto unregister_clks;
}
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;
}
if (mcd->need_runtime_pm)
pm_runtime_put(&pdev->dev);
return r;
unregister_clks:
if (mcd->clks)
mtk_clk_unregister_gates(mcd->clks, mcd->num_clks, clk_data);
unregister_dividers:
if (mcd->divider_clks)
mtk_clk_unregister_dividers(mcd->divider_clks,
mcd->num_divider_clks, clk_data);
unregister_composites:
if (mcd->composite_clks)
mtk_clk_unregister_composites(mcd->composite_clks,
mcd->num_composite_clks, clk_data);
unregister_muxes:
if (mcd->mux_clks)
mtk_clk_unregister_muxes(mcd->mux_clks,
mcd->num_mux_clks, clk_data);
unregister_factors:
if (mcd->factor_clks)
mtk_clk_unregister_factors(mcd->factor_clks,
mcd->num_factor_clks, clk_data);
unregister_fixed_clks:
if (mcd->fixed_clks)
mtk_clk_unregister_fixed_clks(mcd->fixed_clks,
mcd->num_fixed_clks, clk_data);
free_data:
mtk_free_clk_data(clk_data);
free_base:
if (mcd->need_runtime_pm)
pm_runtime_put(&pdev->dev);
unmap_io:
if (mcd->shared_io && base)
iounmap(base);
return r;
}
static void __mtk_clk_simple_remove(struct platform_device *pdev,
struct device_node *node)
{
struct clk_hw_onecell_data *clk_data = platform_get_drvdata(pdev);
const struct mtk_clk_desc *mcd = device_get_match_data(&pdev->dev);
of_clk_del_provider(node);
if (mcd->clks)
mtk_clk_unregister_gates(mcd->clks, mcd->num_clks, clk_data);
if (mcd->divider_clks)
mtk_clk_unregister_dividers(mcd->divider_clks,
mcd->num_divider_clks, clk_data);
if (mcd->composite_clks)
mtk_clk_unregister_composites(mcd->composite_clks,
mcd->num_composite_clks, clk_data);
if (mcd->mux_clks)
mtk_clk_unregister_muxes(mcd->mux_clks,
mcd->num_mux_clks, clk_data);
if (mcd->factor_clks)
mtk_clk_unregister_factors(mcd->factor_clks,
mcd->num_factor_clks, clk_data);
if (mcd->fixed_clks)
mtk_clk_unregister_fixed_clks(mcd->fixed_clks,
mcd->num_fixed_clks, clk_data);
mtk_free_clk_data(clk_data);
}
int mtk_clk_pdev_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *node = dev->parent->of_node;
return __mtk_clk_simple_probe(pdev, node);
}
EXPORT_SYMBOL_GPL(mtk_clk_pdev_probe);
int mtk_clk_simple_probe(struct platform_device *pdev)
{
struct device_node *node = pdev->dev.of_node;
return __mtk_clk_simple_probe(pdev, node);
}
EXPORT_SYMBOL_GPL(mtk_clk_simple_probe);
void mtk_clk_pdev_remove(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *node = dev->parent->of_node;
__mtk_clk_simple_remove(pdev, node);
}
EXPORT_SYMBOL_GPL(mtk_clk_pdev_remove);
void mtk_clk_simple_remove(struct platform_device *pdev)
{
__mtk_clk_simple_remove(pdev, pdev->dev.of_node);
}
EXPORT_SYMBOL_GPL(mtk_clk_simple_remove);
struct regmap *mtk_clk_get_hwv_regmap(struct device_node *node)
{
struct device_node *hwv_node;
struct regmap *regmap_hwv;
hwv_node = of_parse_phandle(node, "mediatek,hardware-voter", 0);
if (!hwv_node)
return NULL;
regmap_hwv = device_node_to_regmap(hwv_node);
of_node_put(hwv_node);
return regmap_hwv;
}
EXPORT_SYMBOL_GPL(mtk_clk_get_hwv_regmap);
MODULE_LICENSE("GPL");
