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Commit 5dad3de6 authored by Taniya Das's avatar Taniya Das Committed by Naveen Yadav
Browse files

cpufreq: qcom: Add sysfs to reflect the limit frequency 



The CPU node would have the sysfs entry which would indicate the max
limited frequency due to throttle.

Change-Id: I05b82be220111ab7a384349d620e4731d76b7834
Signed-off-by: default avatarTaniya Das <tdas@codeaurora.org>
parent dcedf3c5

drivers/cpufreq/qcom-cpufreq-hw.c

+16 −0
Original line number Diff line number Diff line
@@ -59,8 +59,10 @@ struct cpufreq_qcom { 
	struct cpufreq_frequency_table *table;

	void __iomem *base;

	cpumask_t related_cpus;

	unsigned long dcvsh_freq_limit;

	struct delayed_work freq_poll_work;

	struct mutex dcvsh_lock;

	struct device_attribute freq_limit_attr;

	int dcvsh_irq;

	char dcvsh_irq_name[MAX_FN_SIZE];

	bool is_irq_enabled;
@@ -95,6 +97,14 @@ static const u16 cpufreq_qcom_epss_std_offsets[REG_ARRAY_SIZE] = { 
static struct cpufreq_qcom *qcom_freq_domain_map[NR_CPUS];

static struct cpufreq_counter qcom_cpufreq_counter[NR_CPUS];



static ssize_t dcvsh_freq_limit_show(struct device *dev,

		struct device_attribute *attr, char *buf)

{

	struct cpufreq_qcom *c = container_of(attr, struct cpufreq_qcom,

						freq_limit_attr);

	return scnprintf(buf, PAGE_SIZE, "%lu\n", c->dcvsh_freq_limit);

}



static unsigned long limits_mitigation_notify(struct cpufreq_qcom *c)

{

	int i;
@@ -111,6 +121,7 @@ static unsigned long limits_mitigation_notify(struct cpufreq_qcom *c) 
					c->table[i].frequency);

			trace_dcvsh_freq(cpumask_first(&c->related_cpus),

						c->table[i].frequency);

			c->dcvsh_freq_limit = c->table[i].frequency;

			return c->table[i].frequency;

		}

	}
@@ -297,6 +308,11 @@ static int qcom_cpufreq_hw_cpu_init(struct cpufreq_policy *policy) 


		c->is_irq_enabled = true;

		writel_relaxed(LT_IRQ_STATUS, c->base + offsets[REG_INTR_EN]);

		c->freq_limit_attr.attr.name = "dcvsh_freq_limit";

		c->freq_limit_attr.show = dcvsh_freq_limit_show;

		c->freq_limit_attr.attr.mode = 0444;

		c->dcvsh_freq_limit = U32_MAX;

		device_create_file(cpu_dev, &c->freq_limit_attr);

	}



	return 0;