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cpufreq: qcom: Add support for qcs404 on nvmem driver 

Add support for qcs404 on nvmem driver.

The qcs404 SoC has support for Core Power Reduction (CPR), which is
implemented as a power domain provider, therefore add optional support
in this driver to attach to a genpd power domain.

Co-developed-by: Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org>
Signed-off-by: Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org>
Signed-off-by: Niklas Cassel <niklas.cassel@linaro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
This commit is contained in:
Niklas Cassel 2019-07-25 12:41:35 +02:00 committed by Viresh Kumar
parent 57f2f8b4aa
commit 1cb8339ca2
1 changed files with 47 additions and 3 deletions
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50
drivers/cpufreq/qcom-cpufreq-nvmem.c
View File

@ -24,6 +24,7 @@
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/pm_domain.h>
#include <linux/pm_opp.h>
#include <linux/slab.h>
#include <linux/soc/qcom/smem.h>
@ -49,10 +50,12 @@ struct qcom_cpufreq_match_data {
int (*get_version)(struct device *cpu_dev,
struct nvmem_cell *speedbin_nvmem,
struct qcom_cpufreq_drv *drv);
const char **genpd_names;
};
struct qcom_cpufreq_drv {
struct opp_table **opp_tables;
struct opp_table **genpd_opp_tables;
u32 versions;
const struct qcom_cpufreq_match_data *data;
};
@ -126,6 +129,12 @@ static const struct qcom_cpufreq_match_data match_data_kryo = {
.get_version = qcom_cpufreq_kryo_name_version,
};
static const char *qcs404_genpd_names[] = { "cpr", NULL };
static const struct qcom_cpufreq_match_data match_data_qcs404 = {
.genpd_names = qcs404_genpd_names,
};
static int qcom_cpufreq_probe(struct platform_device *pdev)
{
struct qcom_cpufreq_drv *drv;
@ -188,11 +197,19 @@ static int qcom_cpufreq_probe(struct platform_device *pdev)
goto free_drv;
}
drv->genpd_opp_tables = kcalloc(num_possible_cpus(),
sizeof(*drv->genpd_opp_tables),
GFP_KERNEL);
if (!drv->genpd_opp_tables) {
ret = -ENOMEM;
goto free_opp;
}
for_each_possible_cpu(cpu) {
cpu_dev = get_cpu_device(cpu);
if (NULL == cpu_dev) {
ret = -ENODEV;
goto free_opp;
goto free_genpd_opp;
}
if (drv->data->get_version) {
@ -203,7 +220,22 @@ static int qcom_cpufreq_probe(struct platform_device *pdev)
ret = PTR_ERR(drv->opp_tables[cpu]);
dev_err(cpu_dev,
"Failed to set supported hardware\n");
goto free_opp;
goto free_genpd_opp;
}
}
if (drv->data->genpd_names) {
drv->genpd_opp_tables[cpu] =
dev_pm_opp_attach_genpd(cpu_dev,
drv->data->genpd_names,
NULL);
if (IS_ERR(drv->genpd_opp_tables[cpu])) {
ret = PTR_ERR(drv->genpd_opp_tables[cpu]);
if (ret != -EPROBE_DEFER)
dev_err(cpu_dev,
"Could not attach to pm_domain: %d\n",
ret);
goto free_genpd_opp;
}
}
}
@ -218,6 +250,13 @@ static int qcom_cpufreq_probe(struct platform_device *pdev)
ret = PTR_ERR(cpufreq_dt_pdev);
dev_err(cpu_dev, "Failed to register platform device\n");
free_genpd_opp:
for_each_possible_cpu(cpu) {
if (IS_ERR_OR_NULL(drv->genpd_opp_tables[cpu]))
break;
dev_pm_opp_detach_genpd(drv->genpd_opp_tables[cpu]);
}
kfree(drv->genpd_opp_tables);
free_opp:
for_each_possible_cpu(cpu) {
if (IS_ERR_OR_NULL(drv->opp_tables[cpu]))
@ -238,11 +277,15 @@ static int qcom_cpufreq_remove(struct platform_device *pdev)
platform_device_unregister(cpufreq_dt_pdev);
for_each_possible_cpu(cpu)
for_each_possible_cpu(cpu) {
if (drv->opp_tables[cpu])
dev_pm_opp_put_supported_hw(drv->opp_tables[cpu]);
if (drv->genpd_opp_tables[cpu])
dev_pm_opp_detach_genpd(drv->genpd_opp_tables[cpu]);
}
kfree(drv->opp_tables);
kfree(drv->genpd_opp_tables);
kfree(drv);
return 0;
@ -259,6 +302,7 @@ static struct platform_driver qcom_cpufreq_driver = {
static const struct of_device_id qcom_cpufreq_match_list[] __initconst = {
{ .compatible = "qcom,apq8096", .data = &match_data_kryo },
{ .compatible = "qcom,msm8996", .data = &match_data_kryo },
{ .compatible = "qcom,qcs404", .data = &match_data_qcs404 },
{},
};