Merge "clk: qcom: Add additional clock debugfs support"

This commit is contained in:
qctecmdr 2019-12-10 12:44:53 -08:00 • committed by Gerrit - the friendly Code Review server
commit 365ba81c39
13 changed files with 777 additions and 5 deletions

View file

@ -23,6 +23,15 @@ config COMMON_CLK
menu "Common Clock Framework"
depends on COMMON_CLK
config COMMON_CLK_QCOM_DEBUG
bool "QCOM clock debug features"
depends on DEBUG_FS && QGKI
help
Support for QCOM debug features. These features include
modifications to existing debugfs nodes to make them writable (e.g.
clk_enable_count, clk_rate), as well as new debugfs nodes (e.g.
clk_enabled_list, debug_suspend, trace_clocks).
config COMMON_CLK_WM831X
tristate "Clock driver for WM831x/2x PMICs"
depends on MFD_WM831X

View file

@ -3127,6 +3127,76 @@ static int clk_max_rate_show(struct seq_file *s, void *data)
}
DEFINE_SHOW_ATTRIBUTE(clk_max_rate);
static int clock_debug_rate_set(void *data, u64 val)
{
struct clk_core *core = data;
int ret;
ret = clk_set_rate(core->hw->clk, val);
if (ret)
pr_err("clk_set_rate(%lu) failed (%d)\n",
(unsigned long)val, ret);
return ret;
}
static int clock_debug_rate_get(void *data, u64 *val)
{
struct clk_core *core = data;
*val = clk_get_rate(core->hw->clk);
return 0;
}
DEFINE_DEBUGFS_ATTRIBUTE(clock_rate_fops, clock_debug_rate_get,
clock_debug_rate_set, "%llu\n");
static ssize_t clock_parent_read(struct file *filp, char __user *ubuf,
size_t cnt, loff_t *ppos)
{
char name[256] = {0};
struct clk_core *core = filp->private_data;
struct clk_core *p = core->hw->core->parent;
snprintf(name, sizeof(name), "%s\n", p ? p->name : "None\n");
return simple_read_from_buffer(ubuf, cnt, ppos, name, strlen(name));
}
static const struct file_operations clock_parent_fops = {
.open = simple_open,
.read = clock_parent_read,
};
static int clock_debug_enable_set(void *data, u64 val)
{
struct clk_core *core = data;
int rc = 0;
if (val)
rc = clk_prepare_enable(core->hw->clk);
else
clk_disable_unprepare(core->hw->clk);
return rc;
}
static int clock_debug_enable_get(void *data, u64 *val)
{
struct clk_core *core = data;
int enabled = 0;
enabled = core->enable_count;
*val = enabled;
return 0;
}
DEFINE_DEBUGFS_ATTRIBUTE(clock_enable_fops, clock_debug_enable_get,
clock_debug_enable_set, "%lld\n");
static void clk_debug_create_one(struct clk_core *core, struct dentry *pdentry)
{
struct dentry *root;
@ -3137,14 +3207,15 @@ static void clk_debug_create_one(struct clk_core *core, struct dentry *pdentry)
root = debugfs_create_dir(core->name, pdentry);
core->dentry = root;
debugfs_create_ulong("clk_rate", 0444, root, &core->rate);
debugfs_create_file("clk_rate", 0444, root, core, &clock_rate_fops);
debugfs_create_file("clk_min_rate", 0444, root, core, &clk_min_rate_fops);
debugfs_create_file("clk_max_rate", 0444, root, core, &clk_max_rate_fops);
debugfs_create_ulong("clk_accuracy", 0444, root, &core->accuracy);
debugfs_create_u32("clk_phase", 0444, root, &core->phase);
debugfs_create_file("clk_flags", 0444, root, core, &clk_flags_fops);
debugfs_create_u32("clk_prepare_count", 0444, root, &core->prepare_count);
debugfs_create_u32("clk_enable_count", 0444, root, &core->enable_count);
debugfs_create_file("clk_enable_count", 0444, root, core,
&clock_enable_fops);
debugfs_create_u32("clk_protect_count", 0444, root, &core->protect_count);
debugfs_create_u32("clk_notifier_count", 0444, root, &core->notifier_count);
debugfs_create_file("clk_duty_cycle", 0444, root, core,
@ -3196,6 +3267,156 @@ static void clk_debug_unregister(struct clk_core *core)
mutex_unlock(&clk_debug_lock);
}
#ifdef CONFIG_COMMON_CLK_QCOM_DEBUG
#define clock_debug_output(m, fmt, ...) \
do { \
if (m) \
seq_printf(m, fmt, ##__VA_ARGS__); \
else \
pr_info(fmt, ##__VA_ARGS__); \
} while (0)
static int clock_debug_print_clock(struct clk_core *c, struct seq_file *s)
{
char *start = "\t";
struct clk *clk;
if (!c || !c->prepare_count)
return 0;
clk = c->hw->clk;
do {
c = clk->core;
if (c->ops->list_rate_vdd_level)
clock_debug_output(s, "%s%s:%u:%u [%ld, %d]", start,
c->name,
c->prepare_count,
c->enable_count,
c->rate,
c->ops->list_rate_vdd_level(c->hw, c->rate));
else
clock_debug_output(s, "%s%s:%u:%u [%ld]", start,
c->name,
c->prepare_count,
c->enable_count,
c->rate);
start = " -> ";
} while (s && (clk = clk_get_parent(clk)));
if (s)
clock_debug_output(s, "\n");
return 1;
}
/*
* clock_debug_print_enabled_clocks() - Print names of enabled clocks
*/
static void clock_debug_print_enabled_clocks(struct seq_file *s)
{
struct clk_core *core;
int cnt = 0;
clock_debug_output(s, "Enabled clocks:\n");
hlist_for_each_entry(core, &clk_debug_list, debug_node)
cnt += clock_debug_print_clock(core, s);
if (cnt)
clock_debug_output(s, "Enabled clock count: %d\n", cnt);
else
clock_debug_output(s, "No clocks enabled.\n");
}
static int enabled_clocks_show(struct seq_file *s, void *unused)
{
mutex_lock(&clk_debug_lock);
clock_debug_print_enabled_clocks(s);
mutex_unlock(&clk_debug_lock);
return 0;
}
static int enabled_clocks_open(struct inode *inode, struct file *file)
{
return single_open(file, enabled_clocks_show, inode->i_private);
}
static const struct file_operations clk_enabled_list_fops = {
.open = enabled_clocks_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release,
};
static u32 debug_suspend;
/*
* Print the names of all enabled clocks and their parents if
* debug_suspend is set from debugfs.
*/
void clock_debug_print_enabled(void)
{
if (likely(!debug_suspend))
return;
if (!mutex_trylock(&clk_debug_lock))
return;
clock_debug_print_enabled_clocks(NULL);
mutex_unlock(&clk_debug_lock);
}
EXPORT_SYMBOL(clock_debug_print_enabled);
static void clk_state_subtree(struct clk_core *c)
{
int vdd_level = 0;
struct clk_core *child;
if (!c)
return;
if (c->ops->list_rate_vdd_level)
vdd_level = c->ops->list_rate_vdd_level(c->hw, c->rate);
trace_clk_state(c->name, c->prepare_count, c->enable_count,
c->rate, vdd_level);
hlist_for_each_entry(child, &c->children, child_node)
clk_state_subtree(child);
}
static int clk_state_show(struct seq_file *s, void *data)
{
struct clk_core *c;
struct hlist_head **lists = (struct hlist_head **)s->private;
clk_prepare_lock();
for (; *lists; lists++)
hlist_for_each_entry(c, *lists, child_node)
clk_state_subtree(c);
clk_prepare_unlock();
return 0;
}
static int clk_state_open(struct inode *inode, struct file *file)
{
return single_open(file, clk_state_show, inode->i_private);
}
static const struct file_operations clk_state_fops = {
.open = clk_state_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
#endif
/**
* clk_debug_init - lazily populate the debugfs clk directory
*
@ -3220,6 +3441,14 @@ static int __init clk_debug_init(void)
debugfs_create_file("clk_orphan_dump", 0444, rootdir, &orphan_list,
&clk_dump_fops);
#ifdef CONFIG_COMMON_CLK_QCOM_DEBUG
debugfs_create_file("clk_enabled_list", 0444, rootdir,
&clk_debug_list, &clk_enabled_list_fops);
debugfs_create_u32("debug_suspend", 0644, rootdir, &debug_suspend);
debugfs_create_file("trace_clocks", 0444, rootdir, &all_lists,
&clk_state_fops);
#endif
mutex_lock(&clk_debug_lock);
hlist_for_each_entry(core, &clk_debug_list, debug_node)
clk_debug_create_one(core, rootdir);

View file

@ -25,6 +25,10 @@ struct clk_hw *clk_find_hw(const char *dev_id, const char *con_id);
struct clk *clk_hw_create_clk(struct device *dev, struct clk_hw *hw,
const char *dev_id, const char *con_id);
void __clk_put(struct clk *clk);
/* Debugfs API to print the enabled clocks */
void clock_debug_print_enabled(void);
#else
/* All these casts to avoid ifdefs in clkdev... */
static inline struct clk *

View file

@ -11,6 +11,7 @@
#include <linux/delay.h>
#include "clk-alpha-pll.h"
#include "clk-debug.h"
#include "common.h"
#define PLL_MODE(p) ((p)->offset + 0x0)
@ -1331,6 +1332,53 @@ static void clk_zonda_5lpe_pll_disable(struct clk_hw *hw)
return;
}
static void clk_alpha_pll_list_registers(struct seq_file *f, struct clk_hw *hw)
{
struct clk_alpha_pll *pll = to_clk_alpha_pll(hw);
int size, i, val;
static struct clk_register_data data[] = {
{"PLL_MODE", 0x0},
{"PLL_L_VAL", 0x4},
{"PLL_ALPHA_VAL", 0x8},
{"PLL_ALPHA_VAL_U", 0xC},
{"PLL_USER_CTL", 0x10},
{"PLL_CONFIG_CTL", 0x18},
};
static struct clk_register_data data1[] = {
{"APSS_PLL_VOTE", 0x0},
};
size = ARRAY_SIZE(data);
for (i = 0; i < size; i++) {
regmap_read(pll->clkr.regmap, pll->offset + data[i].offset,
&val);
seq_printf(f, "%20s: 0x%.8x\n", data[i].name, val);
}
regmap_read(pll->clkr.regmap, pll->offset + data[0].offset, &val);
if (val & PLL_FSM_ENA) {
regmap_read(pll->clkr.regmap, pll->clkr.enable_reg +
data1[0].offset, &val);
seq_printf(f, "%20s: 0x%.8x\n", data1[0].name, val);
}
}
static struct clk_regmap_ops clk_alpha_pll_regmap_ops = {
.list_registers = clk_alpha_pll_list_registers,
};
static void clk_alpha_pll_init(struct clk_hw *hw)
{
struct clk_regmap *rclk = to_clk_regmap(hw);
if (!rclk->ops)
rclk->ops = &clk_alpha_pll_regmap_ops;
}
const struct clk_ops clk_alpha_pll_ops = {
.prepare = clk_prepare_regmap,
.unprepare = clk_unprepare_regmap,
@ -1342,6 +1390,11 @@ const struct clk_ops clk_alpha_pll_ops = {
.recalc_rate = clk_alpha_pll_recalc_rate,
.round_rate = clk_alpha_pll_round_rate,
.set_rate = clk_alpha_pll_set_rate,
.init = clk_alpha_pll_init,
.debug_init = clk_common_debug_init,
#ifdef CONFIG_COMMON_CLK_QCOM_DEBUG
.list_rate_vdd_level = clk_list_rate_vdd_level,
#endif
};
EXPORT_SYMBOL_GPL(clk_alpha_pll_ops);
@ -1356,6 +1409,9 @@ const struct clk_ops clk_alpha_pll_huayra_ops = {
.recalc_rate = alpha_pll_huayra_recalc_rate,
.round_rate = alpha_pll_huayra_round_rate,
.set_rate = alpha_pll_huayra_set_rate,
#ifdef CONFIG_COMMON_CLK_QCOM_DEBUG
.list_rate_vdd_level = clk_list_rate_vdd_level,
#endif
};
EXPORT_SYMBOL_GPL(clk_alpha_pll_huayra_ops);
@ -1370,6 +1426,10 @@ const struct clk_ops clk_alpha_pll_hwfsm_ops = {
.recalc_rate = clk_alpha_pll_recalc_rate,
.round_rate = clk_alpha_pll_round_rate,
.set_rate = clk_alpha_pll_hwfsm_set_rate,
.debug_init = clk_common_debug_init,
#ifdef CONFIG_COMMON_CLK_QCOM_DEBUG
.list_rate_vdd_level = clk_list_rate_vdd_level,
#endif
};
EXPORT_SYMBOL_GPL(clk_alpha_pll_hwfsm_ops);
@ -1383,6 +1443,9 @@ const struct clk_ops clk_trion_fixed_pll_ops = {
.is_enabled = clk_trion_pll_is_enabled,
.recalc_rate = clk_trion_pll_recalc_rate,
.round_rate = clk_trion_pll_round_rate,
#ifdef CONFIG_COMMON_CLK_QCOM_DEBUG
.list_rate_vdd_level = clk_list_rate_vdd_level,
#endif
};
EXPORT_SYMBOL_GPL(clk_trion_fixed_pll_ops);
@ -1397,6 +1460,9 @@ const struct clk_ops clk_alpha_pll_zonda_ops = {
.recalc_rate = clk_zonda_pll_recalc_rate,
.round_rate = clk_alpha_pll_round_rate,
.set_rate = clk_zonda_pll_set_rate,
#ifdef CONFIG_COMMON_CLK_QCOM_DEBUG
.list_rate_vdd_level = clk_list_rate_vdd_level,
#endif
};
EXPORT_SYMBOL(clk_alpha_pll_zonda_ops);
@ -1681,6 +1747,9 @@ const struct clk_ops clk_alpha_pll_fabia_ops = {
.set_rate = alpha_pll_fabia_set_rate,
.recalc_rate = alpha_pll_fabia_recalc_rate,
.round_rate = clk_alpha_pll_round_rate,
#ifdef CONFIG_COMMON_CLK_QCOM_DEBUG
.list_rate_vdd_level = clk_list_rate_vdd_level,
#endif
};
EXPORT_SYMBOL_GPL(clk_alpha_pll_fabia_ops);
@ -1694,6 +1763,9 @@ const struct clk_ops clk_alpha_pll_fixed_fabia_ops = {
.is_enabled = clk_alpha_pll_is_enabled,
.recalc_rate = alpha_pll_fabia_recalc_rate,
.round_rate = clk_alpha_pll_round_rate,
#ifdef CONFIG_COMMON_CLK_QCOM_DEBUG
.list_rate_vdd_level = clk_list_rate_vdd_level,
#endif
};
EXPORT_SYMBOL_GPL(clk_alpha_pll_fixed_fabia_ops);
@ -2476,6 +2548,9 @@ const struct clk_ops clk_alpha_pll_lucid_ops = {
.recalc_rate = alpha_pll_lucid_recalc_rate,
.round_rate = clk_alpha_pll_round_rate,
.set_rate = alpha_pll_lucid_set_rate,
#ifdef CONFIG_COMMON_CLK_QCOM_DEBUG
.list_rate_vdd_level = clk_list_rate_vdd_level,
#endif
};
EXPORT_SYMBOL(clk_alpha_pll_lucid_ops);
@ -2490,6 +2565,10 @@ const struct clk_ops clk_alpha_pll_lucid_5lpe_ops = {
.recalc_rate = alpha_pll_lucid_recalc_rate,
.round_rate = clk_alpha_pll_round_rate,
.set_rate = alpha_pll_lucid_5lpe_set_rate,
.debug_init = clk_common_debug_init,
#ifdef CONFIG_COMMON_CLK_QCOM_DEBUG
.list_rate_vdd_level = clk_list_rate_vdd_level,
#endif
};
EXPORT_SYMBOL(clk_alpha_pll_lucid_5lpe_ops);
@ -2503,6 +2582,9 @@ const struct clk_ops clk_alpha_pll_fixed_lucid_ops = {
.is_enabled = alpha_pll_lucid_is_enabled,
.recalc_rate = alpha_pll_lucid_recalc_rate,
.round_rate = clk_alpha_pll_round_rate,
#ifdef CONFIG_COMMON_CLK_QCOM_DEBUG
.list_rate_vdd_level = clk_list_rate_vdd_level,
#endif
};
EXPORT_SYMBOL(clk_alpha_pll_fixed_lucid_ops);
@ -2523,6 +2605,10 @@ const struct clk_ops clk_alpha_pll_fixed_lucid_5lpe_ops = {
.is_enabled = alpha_pll_lucid_is_enabled,
.recalc_rate = alpha_pll_lucid_recalc_rate,
.round_rate = clk_alpha_pll_round_rate,
.debug_init = clk_common_debug_init,
#ifdef CONFIG_COMMON_CLK_QCOM_DEBUG
.list_rate_vdd_level = clk_list_rate_vdd_level,
#endif
};
EXPORT_SYMBOL(clk_alpha_pll_fixed_lucid_5lpe_ops);

View file

@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2013, 2016, The Linux Foundation. All rights reserved.
* Copyright (c) 2013, 2016-2019, The Linux Foundation. All rights reserved.
*/
#include <linux/kernel.h>
@ -14,6 +14,7 @@
#include "clk-branch.h"
#include "clk-debug.h"
#include "clk-regmap.h"
static bool clk_branch_in_hwcg_mode(const struct clk_branch *br)
{
@ -124,10 +125,17 @@ static void clk_branch_disable(struct clk_hw *hw)
clk_branch_toggle(hw, false, clk_branch_check_halt);
}
static void clk_branch_debug_init(struct clk_hw *hw, struct dentry *dentry)
{
clk_common_debug_init(hw, dentry);
clk_debug_measure_add(hw, dentry);
}
const struct clk_ops clk_branch_ops = {
.enable = clk_branch_enable,
.disable = clk_branch_disable,
.is_enabled = clk_is_enabled_regmap,
.debug_init = clk_branch_debug_init,
};
EXPORT_SYMBOL_GPL(clk_branch_ops);
@ -141,17 +149,69 @@ static void clk_branch2_disable(struct clk_hw *hw)
clk_branch_toggle(hw, false, clk_branch2_check_halt);
}
static void clk_branch2_list_registers(struct seq_file *f, struct clk_hw *hw)
{
struct clk_branch *br = to_clk_branch(hw);
struct clk_regmap *rclk = to_clk_regmap(hw);
int size, i, val;
static struct clk_register_data data[] = {
{"CBCR", 0x0},
};
static struct clk_register_data data1[] = {
{"APSS_VOTE", 0x0},
{"APSS_SLEEP_VOTE", 0x4},
};
size = ARRAY_SIZE(data);
for (i = 0; i < size; i++) {
regmap_read(br->clkr.regmap, br->halt_reg + data[i].offset,
&val);
seq_printf(f, "%20s: 0x%.8x\n", data[i].name, val);
}
if ((br->halt_check & BRANCH_HALT_VOTED) &&
!(br->halt_check & BRANCH_VOTED)) {
if (rclk->enable_reg) {
size = ARRAY_SIZE(data1);
for (i = 0; i < size; i++) {
regmap_read(br->clkr.regmap, rclk->enable_reg +
data1[i].offset, &val);
seq_printf(f, "%20s: 0x%.8x\n",
data1[i].name, val);
}
}
}
}
static struct clk_regmap_ops clk_branch2_regmap_ops = {
.list_registers = clk_branch2_list_registers,
};
static void clk_branch2_init(struct clk_hw *hw)
{
struct clk_regmap *rclk = to_clk_regmap(hw);
if (!rclk->ops)
rclk->ops = &clk_branch2_regmap_ops;
}
const struct clk_ops clk_branch2_ops = {
.enable = clk_branch2_enable,
.disable = clk_branch2_disable,
.is_enabled = clk_is_enabled_regmap,
.debug_init = clk_debug_measure_add,
.init = clk_branch2_init,
.debug_init = clk_branch_debug_init,
};
EXPORT_SYMBOL_GPL(clk_branch2_ops);
const struct clk_ops clk_branch2_aon_ops = {
.enable = clk_branch2_enable,
.is_enabled = clk_is_enabled_regmap,
.init = clk_branch2_init,
.debug_init = clk_branch_debug_init,
};
EXPORT_SYMBOL_GPL(clk_branch2_aon_ops);

View file

@ -386,3 +386,177 @@ int map_debug_bases(struct platform_device *pdev, const char *base,
return 0;
}
EXPORT_SYMBOL(map_debug_bases);
static void clock_print_rate_max_by_level(struct clk_hw *hw,
struct seq_file *s, int level)
{
struct clk_regmap *rclk = to_clk_regmap(hw);
struct clk_vdd_class_data *vdd_data = &rclk->vdd_data;
struct clk_vdd_class *vdd_class = vdd_data->vdd_class;
int off, i, vdd_level, nregs = vdd_class->num_regulators;
unsigned long rate;
rate = clk_get_rate(hw->clk);
vdd_level = clk_find_vdd_level(hw, vdd_data, rate);
seq_printf(s, "%2s%10lu", vdd_level == level ? "[" : "",
vdd_data->rate_max[level]);
for (i = 0; i < nregs; i++) {
off = nregs*level + i;
if (vdd_class->vdd_uv)
seq_printf(s, "%10u", vdd_class->vdd_uv[off]);
}
if (vdd_level == level)
seq_puts(s, "]");
seq_puts(s, "\n");
}
static int rate_max_show(struct seq_file *s, void *unused)
{
struct clk_hw *hw = s->private;
struct clk_regmap *rclk = to_clk_regmap(hw);
struct clk_vdd_class_data *vdd_data = &rclk->vdd_data;
struct clk_vdd_class *vdd_class = vdd_data->vdd_class;
int level = 0, i, nregs = vdd_class->num_regulators, vdd_level;
char reg_name[10];
unsigned long rate;
rate = clk_get_rate(hw->clk);
vdd_level = clk_find_vdd_level(hw, vdd_data, rate);
if (vdd_level < 0) {
seq_printf(s, "could not find_vdd_level for %s, %ld\n",
clk_hw_get_name(hw), rate);
return 0;
}
seq_printf(s, "%12s", "");
for (i = 0; i < nregs; i++) {
snprintf(reg_name, ARRAY_SIZE(reg_name), "reg %d", i);
seq_printf(s, "%10s", reg_name);
}
seq_printf(s, "\n%12s", "freq");
for (i = 0; i < nregs; i++)
seq_printf(s, "%10s", "uV");
seq_puts(s, "\n");
for (level = 0; level < vdd_data->num_rate_max; level++)
clock_print_rate_max_by_level(hw, s, level);
return 0;
}
static int rate_max_open(struct inode *inode, struct file *file)
{
return single_open(file, rate_max_show, inode->i_private);
}
static const struct file_operations rate_max_fops = {
.open = rate_max_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release,
};
static int list_rates_show(struct seq_file *s, void *unused)
{
struct clk_hw *hw = s->private;
struct clk_regmap *rclk = to_clk_regmap(hw);
struct clk_vdd_class_data *vdd_data = &rclk->vdd_data;
struct clk_vdd_class *vdd_class = vdd_data->vdd_class;
int i = 0, level;
unsigned long rate, rate_max = 0;
/* Find max frequency supported within voltage constraints. */
if (!vdd_class) {
rate_max = ULONG_MAX;
} else {
for (level = 0; level < vdd_data->num_rate_max; level++)
if (vdd_data->rate_max[level])
rate_max = vdd_data->rate_max[level];
}
/*
* List supported frequencies <= rate_max. Higher frequencies may
* appear in the frequency table, but are not valid and should not
* be listed.
*/
while (!IS_ERR_VALUE(rate = rclk->ops->list_rate(hw, i++, rate_max))) {
if (rate <= 0)
break;
seq_printf(s, "%lu\n", rate);
}
return 0;
}
static int list_rates_open(struct inode *inode, struct file *file)
{
return single_open(file, list_rates_show, inode->i_private);
}
static const struct file_operations list_rates_fops = {
.open = list_rates_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release,
};
static void clk_debug_print_hw(struct clk_hw *hw, struct seq_file *f)
{
struct clk_regmap *rclk = to_clk_regmap(hw);
if (IS_ERR_OR_NULL(hw))
return;
clk_debug_print_hw(clk_hw_get_parent(hw), f);
seq_printf(f, "%s\n", clk_hw_get_name(hw));
if (rclk->ops && rclk->ops->list_registers)
rclk->ops->list_registers(f, hw);
}
static int print_hw_show(struct seq_file *m, void *unused)
{
struct clk_hw *hw = m->private;
clk_debug_print_hw(hw, m);
return 0;
}
static int print_hw_open(struct inode *inode, struct file *file)
{
return single_open(file, print_hw_show, inode->i_private);
}
static const struct file_operations clock_print_hw_fops = {
.open = print_hw_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release,
};
void clk_common_debug_init(struct clk_hw *hw, struct dentry *dentry)
{
struct clk_regmap *rclk = to_clk_regmap(hw);
if (rclk->vdd_data.vdd_class)
debugfs_create_file("clk_rate_max", 0444, dentry, hw,
&rate_max_fops);
if (rclk->ops && rclk->ops->list_rate)
debugfs_create_file("clk_list_rates", 0444, dentry, hw,
&list_rates_fops);
debugfs_create_file("clk_print_regs", 0444, dentry, hw,
&clock_print_hw_fops);
};

View file

@ -90,4 +90,6 @@ void clk_debug_measure_add(struct clk_hw *hw, struct dentry *dentry);
int map_debug_bases(struct platform_device *pdev, const char *base,
struct clk_debug_mux *mux);
void clk_common_debug_init(struct clk_hw *hw, struct dentry *dentry);
#endif

View file

@ -20,6 +20,7 @@
#include "clk-rcg.h"
#include "common.h"
#include "clk-debug.h"
#define CMD_REG 0x0
#define CMD_UPDATE BIT(0)
@ -444,6 +445,61 @@ static int clk_rcg2_configure(struct clk_rcg2 *rcg, const struct freq_tbl *f)
return update_config(rcg);
}
static void clk_rcg2_list_registers(struct seq_file *f, struct clk_hw *hw)
{
struct clk_rcg2 *rcg = to_clk_rcg2(hw);
int i = 0, size = 0, val;
static struct clk_register_data data[] = {
{"CMD_RCGR", 0x0},
{"CFG_RCGR", 0x4},
};
static struct clk_register_data data1[] = {
{"CMD_RCGR", 0x0},
{"CFG_RCGR", 0x4},
{"M_VAL", 0x8},
{"N_VAL", 0xC},
{"D_VAL", 0x10},
};
if (rcg->mnd_width) {
size = ARRAY_SIZE(data1);
for (i = 0; i < size; i++) {
regmap_read(rcg->clkr.regmap, (rcg->cmd_rcgr +
data1[i].offset), &val);
seq_printf(f, "%20s: 0x%.8x\n", data1[i].name, val);
}
} else {
size = ARRAY_SIZE(data);
for (i = 0; i < size; i++) {
regmap_read(rcg->clkr.regmap, (rcg->cmd_rcgr +
data[i].offset), &val);
seq_printf(f, "%20s: 0x%.8x\n", data[i].name, val);
}
}
}
/* Return the nth supported frequency for a given clock. */
static long clk_rcg2_list_rate(struct clk_hw *hw, unsigned int n,
unsigned long fmax)
{
struct clk_rcg2 *rcg = to_clk_rcg2(hw);
const struct freq_tbl *f = rcg->freq_tbl;
size_t freq_tbl_size = 0;
if (!f)
return -ENXIO;
for (; f->freq; f++)
freq_tbl_size++;
if (n > freq_tbl_size - 1)
return -EINVAL;
return (rcg->freq_tbl + n)->freq;
}
static int __clk_rcg2_set_rate(struct clk_hw *hw, unsigned long rate,
enum freq_policy policy)
{
@ -628,6 +684,19 @@ static void clk_rcg2_disable(struct clk_hw *hw)
clk_rcg2_clear_force_enable(hw);
}
static struct clk_regmap_ops clk_rcg2_regmap_ops = {
.list_rate = clk_rcg2_list_rate,
.list_registers = clk_rcg2_list_registers,
};
static void clk_rcg2_init(struct clk_hw *hw)
{
struct clk_regmap *rclk = to_clk_regmap(hw);
if (!rclk->ops)
rclk->ops = &clk_rcg2_regmap_ops;
}
const struct clk_ops clk_rcg2_ops = {
.prepare = clk_prepare_regmap,
.unprepare = clk_unprepare_regmap,
@ -642,6 +711,11 @@ const struct clk_ops clk_rcg2_ops = {
.determine_rate = clk_rcg2_determine_rate,
.set_rate = clk_rcg2_set_rate,
.set_rate_and_parent = clk_rcg2_set_rate_and_parent,
.init = clk_rcg2_init,
.debug_init = clk_common_debug_init,
#ifdef CONFIG_COMMON_CLK_QCOM_DEBUG
.list_rate_vdd_level = clk_list_rate_vdd_level,
#endif
};
EXPORT_SYMBOL_GPL(clk_rcg2_ops);
@ -657,6 +731,11 @@ const struct clk_ops clk_rcg2_floor_ops = {
.determine_rate = clk_rcg2_determine_floor_rate,
.set_rate = clk_rcg2_set_floor_rate,
.set_rate_and_parent = clk_rcg2_set_floor_rate_and_parent,
.init = clk_rcg2_init,
.debug_init = clk_common_debug_init,
#ifdef CONFIG_COMMON_CLK_QCOM_DEBUG
.list_rate_vdd_level = clk_list_rate_vdd_level,
#endif
};
EXPORT_SYMBOL_GPL(clk_rcg2_floor_ops);
@ -790,6 +869,11 @@ const struct clk_ops clk_edp_pixel_ops = {
.set_rate = clk_edp_pixel_set_rate,
.set_rate_and_parent = clk_edp_pixel_set_rate_and_parent,
.determine_rate = clk_edp_pixel_determine_rate,
.init = clk_rcg2_init,
.debug_init = clk_common_debug_init,
#ifdef CONFIG_COMMON_CLK_QCOM_DEBUG
.list_rate_vdd_level = clk_list_rate_vdd_level,
#endif
};
EXPORT_SYMBOL_GPL(clk_edp_pixel_ops);
@ -854,6 +938,11 @@ const struct clk_ops clk_byte_ops = {
.set_rate = clk_byte_set_rate,
.set_rate_and_parent = clk_byte_set_rate_and_parent,
.determine_rate = clk_byte_determine_rate,
.init = clk_rcg2_init,
.debug_init = clk_common_debug_init,
#ifdef CONFIG_COMMON_CLK_QCOM_DEBUG
.list_rate_vdd_level = clk_list_rate_vdd_level,
#endif
};
EXPORT_SYMBOL_GPL(clk_byte_ops);
@ -928,6 +1017,11 @@ const struct clk_ops clk_byte2_ops = {
.set_rate = clk_byte2_set_rate,
.set_rate_and_parent = clk_byte2_set_rate_and_parent,
.determine_rate = clk_byte2_determine_rate,
.init = clk_rcg2_init,
.debug_init = clk_common_debug_init,
#ifdef CONFIG_COMMON_CLK_QCOM_DEBUG
.list_rate_vdd_level = clk_list_rate_vdd_level,
#endif
};
EXPORT_SYMBOL_GPL(clk_byte2_ops);
@ -1022,6 +1116,11 @@ const struct clk_ops clk_pixel_ops = {
.set_rate = clk_pixel_set_rate,
.set_rate_and_parent = clk_pixel_set_rate_and_parent,
.determine_rate = clk_pixel_determine_rate,
.init = clk_rcg2_init,
.debug_init = clk_common_debug_init,
#ifdef CONFIG_COMMON_CLK_QCOM_DEBUG
.list_rate_vdd_level = clk_list_rate_vdd_level,
#endif
};
EXPORT_SYMBOL_GPL(clk_pixel_ops);
@ -1108,6 +1207,11 @@ const struct clk_ops clk_dp_ops = {
.set_rate = clk_dp_set_rate,
.set_rate_and_parent = clk_dp_set_rate_and_parent,
.determine_rate = clk_dp_determine_rate,
.init = clk_rcg2_init,
.debug_init = clk_common_debug_init,
#ifdef CONFIG_COMMON_CLK_QCOM_DEBUG
.list_rate_vdd_level = clk_list_rate_vdd_level,
#endif
};
EXPORT_SYMBOL(clk_dp_ops);
@ -1203,6 +1307,11 @@ const struct clk_ops clk_gfx3d_ops = {
.set_rate = clk_gfx3d_set_rate,
.set_rate_and_parent = clk_gfx3d_set_rate_and_parent,
.determine_rate = clk_gfx3d_determine_rate,
.init = clk_rcg2_init,
.debug_init = clk_common_debug_init,
#ifdef CONFIG_COMMON_CLK_QCOM_DEBUG
.list_rate_vdd_level = clk_list_rate_vdd_level,
#endif
};
EXPORT_SYMBOL_GPL(clk_gfx3d_ops);
@ -1314,6 +1423,11 @@ const struct clk_ops clk_rcg2_shared_ops = {
.determine_rate = clk_rcg2_determine_rate,
.set_rate = clk_rcg2_shared_set_rate,
.set_rate_and_parent = clk_rcg2_shared_set_rate_and_parent,
.init = clk_rcg2_init,
.debug_init = clk_common_debug_init,
#ifdef CONFIG_COMMON_CLK_QCOM_DEBUG
.list_rate_vdd_level = clk_list_rate_vdd_level,
#endif
};
EXPORT_SYMBOL_GPL(clk_rcg2_shared_ops);
@ -1458,6 +1572,11 @@ static const struct clk_ops clk_rcg2_dfs_ops = {
.get_parent = clk_rcg2_get_parent,
.determine_rate = clk_rcg2_dfs_determine_rate,
.recalc_rate = clk_rcg2_dfs_recalc_rate,
.init = clk_rcg2_init,
.debug_init = clk_common_debug_init,
#ifdef CONFIG_COMMON_CLK_QCOM_DEBUG
.list_rate_vdd_level = clk_list_rate_vdd_level,
#endif
};
static int clk_rcg2_enable_dfs(const struct clk_rcg_dfs_data *data,
@ -1601,5 +1720,10 @@ const struct clk_ops clk_rcg2_dependent_ops = {
.determine_rate = clk_rcg2_dependent_determine_rate,
.set_rate = clk_rcg2_dependent_set_rate,
.set_rate_and_parent = clk_rcg2_dependent_set_rate_and_parent,
.init = clk_rcg2_init,
.debug_init = clk_common_debug_init,
#ifdef CONFIG_COMMON_CLK_QCOM_DEBUG
.list_rate_vdd_level = clk_list_rate_vdd_level,
#endif
};
EXPORT_SYMBOL(clk_rcg2_dependent_ops);

View file

@ -5,10 +5,28 @@
#define __QCOM_CLK_REGMAP_H__
#include <linux/clk-provider.h>
#include <linux/debugfs.h>
#include "vdd-class.h"
struct regmap;
/**
* struct clk_regmap_ops - Operations for clk_regmap.
*
* @list_registers: Queries the hardware to get the current register contents.
* This callback is optional.
*
* @list_rate: On success, return the nth supported frequency for a given
* clock that is below rate_max. Return -ENXIO in case there is
* no frequency table.
*/
struct clk_regmap_ops {
void (*list_registers)(struct seq_file *f,
struct clk_hw *hw);
long (*list_rate)(struct clk_hw *hw, unsigned int n,
unsigned long rate_max);
};
/**
* struct clk_regmap - regmap supporting clock
* @hw: handle between common and hardware-specific interfaces
@ -19,7 +37,9 @@ struct regmap;
* @enable_is_inverted: flag to indicate set enable_mask bits to disable
* when using clock_enable_regmap and friends APIs.
* @vdd_data: struct containing vdd-class data for this clock
* @ops: operations this clk_regmap supports
*/
struct clk_regmap {
struct clk_hw hw;
struct clk_hw *dependent_hw;
@ -28,6 +48,7 @@ struct clk_regmap {
unsigned int enable_mask;
bool enable_is_inverted;
struct clk_vdd_class_data vdd_data;
struct clk_regmap_ops *ops;
};
#define to_clk_regmap(_hw) container_of(_hw, struct clk_regmap, hw)
@ -42,4 +63,9 @@ int clk_post_change_regmap(struct clk_hw *hw, unsigned long old_rate,
unsigned long cur_rate);
int devm_clk_register_regmap(struct device *dev, struct clk_regmap *rclk);
struct clk_register_data {
char *name;
u32 offset;
};
#endif

View file

@ -6,6 +6,7 @@
#include <linux/regulator/consumer.h>
#include "vdd-class.h"
#include "clk-regmap.h"
/*
* Aggregate the vdd_class level votes and call regulator framework functions
@ -169,3 +170,15 @@ int clk_find_vdd_level(struct clk_hw *hw,
return level;
}
EXPORT_SYMBOL(clk_find_vdd_level);
int clk_list_rate_vdd_level(struct clk_hw *hw, unsigned int rate)
{
struct clk_regmap *rclk = to_clk_regmap(hw);
struct clk_vdd_class_data *vdd_data = &rclk->vdd_data;
if (!vdd_data->vdd_class)
return 0;
return clk_find_vdd_level(hw, vdd_data, rate);
}

View file

@ -66,5 +66,6 @@ int clk_find_vdd_level(struct clk_hw *hw, struct clk_vdd_class_data *vdd_data,
unsigned long rate);
int clk_vote_vdd_level(struct clk_vdd_class_data *vdd_class, int level);
int clk_unvote_vdd_level(struct clk_vdd_class_data *vdd_class, int level);
int clk_list_rate_vdd_level(struct clk_hw *hw, unsigned int rate);
#endif

View file

@ -208,6 +208,10 @@ struct clk_duty {
* requirements that were needed while the clock and its tree
* was changing states. Returns 0 on success, -EERROR otherwise.
*
* @list_rate_vdd_level: Queries the required voltage level for the given rate.
* The return value may not represent an exact voltage and instead
* may be an abstract index or voltage "corner".
*
* The clk_enable/clk_disable and clk_prepare/clk_unprepare pairs allow
* implementations to split any work between atomic (enable) and sleepable
* (prepare) contexts. If enabling a clock requires code that might sleep,
@ -259,6 +263,10 @@ struct clk_ops {
int (*post_rate_change)(struct clk_hw *hw,
unsigned long old_rate,
unsigned long rate);
#ifdef CONFIG_COMMON_CLK_QCOM_DEBUG
int (*list_rate_vdd_level)(struct clk_hw *hw,
unsigned int rate);
#endif
};
/**

View file

@ -1,6 +1,6 @@
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (c) 2014-2015, The Linux Foundation. All rights reserved.
* Copyright (c) 2014-2016, The Linux Foundation. All rights reserved.
*/
#undef TRACE_SYSTEM
#define TRACE_SYSTEM clk
@ -220,6 +220,42 @@ DEFINE_EVENT(clk_duty_cycle, clk_set_duty_cycle_complete,
TP_ARGS(core, duty)
);
DECLARE_EVENT_CLASS(clk_state_dump,
TP_PROTO(const char *name, unsigned int prepare_count,
unsigned int enable_count, unsigned long rate, unsigned int vdd_level),
TP_ARGS(name, prepare_count, enable_count, rate, vdd_level),
TP_STRUCT__entry(
__string(name, name)
__field(unsigned int, prepare_count)
__field(unsigned int, enable_count)
__field(unsigned long, rate)
__field(unsigned int, vdd_level)
),
TP_fast_assign(
__assign_str(name, name);
__entry->prepare_count = prepare_count;
__entry->enable_count = enable_count;
__entry->rate = rate;
__entry->vdd_level = vdd_level;
),
TP_printk("%s\tprepare:enable cnt [%u:%u]\trate: vdd_level [%lu:%u]",
__get_str(name), __entry->prepare_count, __entry->enable_count,
__entry->rate, __entry->vdd_level)
);
DEFINE_EVENT(clk_state_dump, clk_state,
TP_PROTO(const char *name, unsigned int prepare_count,
unsigned int enable_count, unsigned long rate, unsigned int vdd_level),
TP_ARGS(name, prepare_count, enable_count, rate, vdd_level)
);
#endif /* _TRACE_CLK_H */
/* This part must be outside protection */