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cpufreq: qcom-cpufreq-hw: Move CPUFreq HW registers entry to sysfs

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Move the logging of CPUFreq HW debug registers from debugfs to
sysfs under /sys/kernel/qcom-cpufreq-hw.

Change-Id: I2d23052d013125ee69de852dcec621c104f0d50a
Signed-off-by: Jagadeesh Kona <jkona@codeaurora.org>
This commit is contained in:
Jagadeesh Kona 2021-04-16 11:57:02 +05:30 • committed by Gerrit - the friendly Code Review server
commit f622aa8eeb
1 changed files with 30 additions and 33 deletions
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65
drivers/cpufreq/qcom-cpufreq-hw-debug.c
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@ -5,7 +5,6 @@
#define pr_fmt(fmt) "cpufreq_hw_debug: %s: " fmt, __func__
#include <linux/debugfs.h>
#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/mfd/syscon.h>
@ -19,6 +18,7 @@ enum debug_hw_regs_data {
REG_PSTATE_STATUS,
REG_EPSS_DEBUG_STATUS,
REG_EPSS_DEBUG_SRB,
REG_EPSS_DEBUG_LUT,
REG_ARRAY_SIZE,
};
@ -26,7 +26,6 @@ enum debug_hw_regs_data {
struct cpufreq_hwregs {
void __iomem *base[REG_ARRAY_SIZE];
int domain_cnt;
struct dentry *debugfs_base;
};
struct cpufreq_register_data {
@ -36,6 +35,8 @@ struct cpufreq_register_data {
static struct cpufreq_hwregs *hw_regs;
static const u16 *offsets;
static struct kobj_attribute cpufreq_hwregs_attr;
static struct kobject *cpufreqhw_kobj;
static const u16 cpufreq_qcom_std_data[] = {
[REG_PERF_STATE] = 0x920,
@ -49,12 +50,14 @@ static const u16 cpufreq_qcom_std_epss_data[] = {
[REG_PSTATE_STATUS] = 0x020,
[REG_EPSS_DEBUG_STATUS] = 0x01c,
[REG_EPSS_DEBUG_SRB] = 0x0bc,
[REG_EPSS_DEBUG_LUT] = 0x100,
};
static int print_cpufreq_hw_debug_regs(struct seq_file *s, void *unused)
static ssize_t cpufreq_hwregs_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
int i, j, size = ARRAY_SIZE(cpufreq_qcom_std_data);
u32 regval;
u32 regval, count = 0;
static struct cpufreq_register_data data[] = {
{"PERF_STATE_DESIRED", REG_PERF_STATE},
@ -62,35 +65,26 @@ static int print_cpufreq_hw_debug_regs(struct seq_file *s, void *unused)
{"PSTATE_STATUS", REG_PSTATE_STATUS},
{"EPSS_DEBUG_STATUS", REG_EPSS_DEBUG_STATUS},
{"EPSS_DEBUG_SRB", REG_EPSS_DEBUG_SRB},
{"EPSS_DEBUG_LUT", REG_EPSS_DEBUG_LUT},
};
if (offsets == cpufreq_qcom_std_epss_data)
size = ARRAY_SIZE(cpufreq_qcom_std_epss_data);
for (i = 0; i < hw_regs->domain_cnt; i++) {
seq_printf(s, "FREQUENCY DOMAIN %d\n", i);
count += scnprintf(buf + count, PAGE_SIZE,
"FREQUENCY DOMAIN %d\n", i);
for (j = 0; j < size; j++) {
regval = readl_relaxed(hw_regs->base[i] +
offsets[data[j].offset]);
seq_printf(s, "%25s: 0x%.8x\n", data[j].name, regval);
count += scnprintf(buf + count, PAGE_SIZE,
"%25s: 0x%.8x\n", data[j].name, regval);
}
}
return 0;
return count;
}
static int print_cpufreq_hw_reg_open(struct inode *inode, struct file *file)
{
return single_open(file, print_cpufreq_hw_debug_regs, NULL);
}
static const struct file_operations cpufreq_debug_register_fops = {
.open = print_cpufreq_hw_reg_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release,
};
static int cpufreq_panic_callback(struct notifier_block *nfb,
unsigned long event, void *unused)
{
@ -103,6 +97,7 @@ static int cpufreq_panic_callback(struct notifier_block *nfb,
{"PSTATE_STATUS", REG_PSTATE_STATUS},
{"EPSS_DEBUG_STATUS", REG_EPSS_DEBUG_STATUS},
{"EPSS_DEBUG_SRB", REG_EPSS_DEBUG_SRB},
{"EPSS_DEBUG_LUT", REG_EPSS_DEBUG_LUT},
};
if (offsets == cpufreq_qcom_std_epss_data)
@ -181,22 +176,23 @@ static int enable_cpufreq_hw_debug(struct platform_device *pdev)
return ret;
}
hw_regs->debugfs_base = debugfs_create_dir("qcom-cpufreq-hw", NULL);
if (!hw_regs->debugfs_base) {
dev_err(&pdev->dev, "Failed to create debugfs entry\n");
return -ENODEV;
cpufreqhw_kobj = kobject_create_and_add("qcom-cpufreq-hw",
kernel_kobj);
if (!cpufreqhw_kobj)
return -ENOMEM;
sysfs_attr_init(&cpufreq_hwregs_attr.attr);
cpufreq_hwregs_attr.attr.name = "print_cpufreq_debug_regs";
cpufreq_hwregs_attr.show = cpufreq_hwregs_show;
cpufreq_hwregs_attr.attr.mode = 0444;
ret = sysfs_create_file(cpufreqhw_kobj, &cpufreq_hwregs_attr.attr);
if (ret) {
dev_err(&pdev->dev, "Failed to create sysfs entry\n");
kobject_put(cpufreqhw_kobj);
}
if (!debugfs_create_file("print_cpufreq_debug_regs", 0444,
hw_regs->debugfs_base, NULL, &cpufreq_debug_register_fops))
goto debugfs_fail;
return 0;
debugfs_fail:
dev_err(&pdev->dev, "Failed to create debugfs entry so cleaning up\n");
debugfs_remove_recursive(hw_regs->debugfs_base);
return -ENODEV;
return ret;
}
static int qcom_cpufreq_hw_debug_probe(struct platform_device *pdev)
@ -206,7 +202,8 @@ static int qcom_cpufreq_hw_debug_probe(struct platform_device *pdev)
static int qcom_cpufreq_hw_debug_remove(struct platform_device *pdev)
{
debugfs_remove_recursive(hw_regs->debugfs_base);
sysfs_remove_file(kernel_kobj, &cpufreq_hwregs_attr.attr);
kobject_put(cpufreqhw_kobj);
return 0;
}