Orange Pi5 kernel

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (c) 2013-2014, The Linux Foundation. All rights reserved.
 */
 
#include <linux/export.h>
#include <linux/module.h>
#include <linux/regmap.h>
#include <linux/platform_device.h>
#include <linux/clk-provider.h>
#include <linux/reset-controller.h>
#include <linux/of.h>
 
#include "common.h"
#include "clk-rcg.h"
#include "clk-regmap.h"
#include "reset.h"
#include "gdsc.h"
 
struct qcom_cc {
<------>struct qcom_reset_controller reset;
<------>struct clk_regmap **rclks;
<------>size_t num_rclks;
};
 
const
struct freq_tbl *qcom_find_freq(const struct freq_tbl *f, unsigned long rate)
{
<------>if (!f)
<------><------>return NULL;
 
<------>if (!f->freq)
<------><------>return f;
 
<------>for (; f->freq; f++)
<------><------>if (rate <= f->freq)
<------><------><------>return f;
 
<------>/* Default to our fastest rate */
<------>return f - 1;
}
EXPORT_SYMBOL_GPL(qcom_find_freq);
 
const struct freq_tbl *qcom_find_freq_floor(const struct freq_tbl *f,
<------><------><------><------><------>    unsigned long rate)
{
<------>const struct freq_tbl *best = NULL;
 
<------>for ( ; f->freq; f++) {
<------><------>if (rate >= f->freq)
<------><------><------>best = f;
<------><------>else
<------><------><------>break;
<------>}
 
<------>return best;
}
EXPORT_SYMBOL_GPL(qcom_find_freq_floor);
 
int qcom_find_src_index(struct clk_hw *hw, const struct parent_map *map, u8 src)
{
<------>int i, num_parents = clk_hw_get_num_parents(hw);
 
<------>for (i = 0; i < num_parents; i++)
<------><------>if (src == map[i].src)
<------><------><------>return i;
 
<------>return -ENOENT;
}
EXPORT_SYMBOL_GPL(qcom_find_src_index);
 
int qcom_find_cfg_index(struct clk_hw *hw, const struct parent_map *map, u8 cfg)
{
<------>int i, num_parents = clk_hw_get_num_parents(hw);
 
<------>for (i = 0; i < num_parents; i++)
<------><------>if (cfg == map[i].cfg)
<------><------><------>return i;
 
<------>return -ENOENT;
}
EXPORT_SYMBOL_GPL(qcom_find_cfg_index);
 
struct regmap *
qcom_cc_map(struct platform_device *pdev, const struct qcom_cc_desc *desc)
{
<------>void __iomem *base;
<------>struct resource *res;
<------>struct device *dev = &pdev->dev;
 
<------>res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
<------>base = devm_ioremap_resource(dev, res);
<------>if (IS_ERR(base))
<------><------>return ERR_CAST(base);
 
<------>return devm_regmap_init_mmio(dev, base, desc->config);
}
EXPORT_SYMBOL_GPL(qcom_cc_map);
 
void
qcom_pll_set_fsm_mode(struct regmap *map, u32 reg, u8 bias_count, u8 lock_count)
{
<------>u32 val;
<------>u32 mask;
 
<------>/* De-assert reset to FSM */
<------>regmap_update_bits(map, reg, PLL_VOTE_FSM_RESET, 0);
 
<------>/* Program bias count and lock count */
<------>val = bias_count << PLL_BIAS_COUNT_SHIFT |
<------><------>lock_count << PLL_LOCK_COUNT_SHIFT;
<------>mask = PLL_BIAS_COUNT_MASK << PLL_BIAS_COUNT_SHIFT;
<------>mask |= PLL_LOCK_COUNT_MASK << PLL_LOCK_COUNT_SHIFT;
<------>regmap_update_bits(map, reg, mask, val);
 
<------>/* Enable PLL FSM voting */
<------>regmap_update_bits(map, reg, PLL_VOTE_FSM_ENA, PLL_VOTE_FSM_ENA);
}
EXPORT_SYMBOL_GPL(qcom_pll_set_fsm_mode);
 
static void qcom_cc_gdsc_unregister(void *data)
{
<------>gdsc_unregister(data);
}
 
/*
 * Backwards compatibility with old DTs. Register a pass-through factor 1/1
 * clock to translate 'path' clk into 'name' clk and register the 'path'
 * clk as a fixed rate clock if it isn't present.
 */
static int _qcom_cc_register_board_clk(struct device *dev, const char *path,
<------><------><------><------>       const char *name, unsigned long rate,
<------><------><------><------>       bool add_factor)
{
<------>struct device_node *node = NULL;
<------>struct device_node *clocks_node;
<------>struct clk_fixed_factor *factor;
<------>struct clk_fixed_rate *fixed;
<------>struct clk_init_data init_data = { };
<------>int ret;
 
<------>clocks_node = of_find_node_by_path("/clocks");
<------>if (clocks_node) {
<------><------>node = of_get_child_by_name(clocks_node, path);
<------><------>of_node_put(clocks_node);
<------>}
 
<------>if (!node) {
<------><------>fixed = devm_kzalloc(dev, sizeof(*fixed), GFP_KERNEL);
<------><------>if (!fixed)
<------><------><------>return -EINVAL;
 
<------><------>fixed->fixed_rate = rate;
<------><------>fixed->hw.init = &init_data;
 
<------><------>init_data.name = path;
<------><------>init_data.ops = &clk_fixed_rate_ops;
 
<------><------>ret = devm_clk_hw_register(dev, &fixed->hw);
<------><------>if (ret)
<------><------><------>return ret;
<------>}
<------>of_node_put(node);
 
<------>if (add_factor) {
<------><------>factor = devm_kzalloc(dev, sizeof(*factor), GFP_KERNEL);
<------><------>if (!factor)
<------><------><------>return -EINVAL;
 
<------><------>factor->mult = factor->div = 1;
<------><------>factor->hw.init = &init_data;
 
<------><------>init_data.name = name;
<------><------>init_data.parent_names = &path;
<------><------>init_data.num_parents = 1;
<------><------>init_data.flags = 0;
<------><------>init_data.ops = &clk_fixed_factor_ops;
 
<------><------>ret = devm_clk_hw_register(dev, &factor->hw);
<------><------>if (ret)
<------><------><------>return ret;
<------>}
 
<------>return 0;
}
 
int qcom_cc_register_board_clk(struct device *dev, const char *path,
<------><------><------>       const char *name, unsigned long rate)
{
<------>bool add_factor = true;
 
<------>/*
<------> * TODO: The RPM clock driver currently does not support the xo clock.
<------> * When xo is added to the RPM clock driver, we should change this
<------> * function to skip registration of xo factor clocks.
<------> */
 
<------>return _qcom_cc_register_board_clk(dev, path, name, rate, add_factor);
}
EXPORT_SYMBOL_GPL(qcom_cc_register_board_clk);
 
int qcom_cc_register_sleep_clk(struct device *dev)
{
<------>return _qcom_cc_register_board_clk(dev, "sleep_clk", "sleep_clk_src",
<------><------><------><------><------>   32768, true);
}
EXPORT_SYMBOL_GPL(qcom_cc_register_sleep_clk);
 
/* Drop 'protected-clocks' from the list of clocks to register */
static void qcom_cc_drop_protected(struct device *dev, struct qcom_cc *cc)
{
<------>struct device_node *np = dev->of_node;
<------>struct property *prop;
<------>const __be32 *p;
<------>u32 i;
 
<------>of_property_for_each_u32(np, "protected-clocks", prop, p, i) {
<------><------>if (i >= cc->num_rclks)
<------><------><------>continue;
 
<------><------>cc->rclks[i] = NULL;
<------>}
}
 
static struct clk_hw *qcom_cc_clk_hw_get(struct of_phandle_args *clkspec,
<------><------><------><------><------> void *data)
{
<------>struct qcom_cc *cc = data;
<------>unsigned int idx = clkspec->args[0];
 
<------>if (idx >= cc->num_rclks) {
<------><------>pr_err("%s: invalid index %u\n", __func__, idx);
<------><------>return ERR_PTR(-EINVAL);
<------>}
 
<------>return cc->rclks[idx] ? &cc->rclks[idx]->hw : NULL;
}
 
int qcom_cc_really_probe(struct platform_device *pdev,
<------><------><------> const struct qcom_cc_desc *desc, struct regmap *regmap)
{
<------>int i, ret;
<------>struct device *dev = &pdev->dev;
<------>struct qcom_reset_controller *reset;
<------>struct qcom_cc *cc;
<------>struct gdsc_desc *scd;
<------>size_t num_clks = desc->num_clks;
<------>struct clk_regmap **rclks = desc->clks;
<------>size_t num_clk_hws = desc->num_clk_hws;
<------>struct clk_hw **clk_hws = desc->clk_hws;
 
<------>cc = devm_kzalloc(dev, sizeof(*cc), GFP_KERNEL);
<------>if (!cc)
<------><------>return -ENOMEM;
 
<------>reset = &cc->reset;
<------>reset->rcdev.of_node = dev->of_node;
<------>reset->rcdev.ops = &qcom_reset_ops;
<------>reset->rcdev.owner = dev->driver->owner;
<------>reset->rcdev.nr_resets = desc->num_resets;
<------>reset->regmap = regmap;
<------>reset->reset_map = desc->resets;
 
<------>ret = devm_reset_controller_register(dev, &reset->rcdev);
<------>if (ret)
<------><------>return ret;
 
<------>if (desc->gdscs && desc->num_gdscs) {
<------><------>scd = devm_kzalloc(dev, sizeof(*scd), GFP_KERNEL);
<------><------>if (!scd)
<------><------><------>return -ENOMEM;
<------><------>scd->dev = dev;
<------><------>scd->scs = desc->gdscs;
<------><------>scd->num = desc->num_gdscs;
<------><------>ret = gdsc_register(scd, &reset->rcdev, regmap);
<------><------>if (ret)
<------><------><------>return ret;
<------><------>ret = devm_add_action_or_reset(dev, qcom_cc_gdsc_unregister,
<------><------><------><------><------>       scd);
<------><------>if (ret)
<------><------><------>return ret;
<------>}
 
<------>cc->rclks = rclks;
<------>cc->num_rclks = num_clks;
 
<------>qcom_cc_drop_protected(dev, cc);
 
<------>for (i = 0; i < num_clk_hws; i++) {
<------><------>ret = devm_clk_hw_register(dev, clk_hws[i]);
<------><------>if (ret)
<------><------><------>return ret;
<------>}
 
<------>for (i = 0; i < num_clks; i++) {
<------><------>if (!rclks[i])
<------><------><------>continue;
 
<------><------>ret = devm_clk_register_regmap(dev, rclks[i]);
<------><------>if (ret)
<------><------><------>return ret;
<------>}
 
<------>ret = devm_of_clk_add_hw_provider(dev, qcom_cc_clk_hw_get, cc);
<------>if (ret)
<------><------>return ret;
 
<------>return 0;
}
EXPORT_SYMBOL_GPL(qcom_cc_really_probe);
 
int qcom_cc_probe(struct platform_device *pdev, const struct qcom_cc_desc *desc)
{
<------>struct regmap *regmap;
 
<------>regmap = qcom_cc_map(pdev, desc);
<------>if (IS_ERR(regmap))
<------><------>return PTR_ERR(regmap);
 
<------>return qcom_cc_really_probe(pdev, desc, regmap);
}
EXPORT_SYMBOL_GPL(qcom_cc_probe);
 
int qcom_cc_probe_by_index(struct platform_device *pdev, int index,
<------><------><------>   const struct qcom_cc_desc *desc)
{
<------>struct regmap *regmap;
<------>struct resource *res;
<------>void __iomem *base;
 
<------>res = platform_get_resource(pdev, IORESOURCE_MEM, index);
<------>base = devm_ioremap_resource(&pdev->dev, res);
<------>if (IS_ERR(base))
<------><------>return -ENOMEM;
 
<------>regmap = devm_regmap_init_mmio(&pdev->dev, base, desc->config);
<------>if (IS_ERR(regmap))
<------><------>return PTR_ERR(regmap);
 
<------>return qcom_cc_really_probe(pdev, desc, regmap);
}
EXPORT_SYMBOL_GPL(qcom_cc_probe_by_index);
 
MODULE_LICENSE("GPL v2");