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cpufreq: ti-cpufreq: Add support for multiple regulators 

Some platforms, like those in the DRA7 and AM57 families, require the
scaling of multiple regulators in order to properly support higher OPPs.
Let the ti-cpufreq driver determine when this is required and pass the
appropriate regulator names to the OPP core so that they can be properly
managed.

Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
hifive-unleashed-5.1
Dave Gerlach 2017-12-14 22:25:26 -06:00 committed by Rafael J. Wysocki
parent db410b2b38
commit c8343e83d4
1 changed files with 24 additions and 4 deletions
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28
drivers/cpufreq/ti-cpufreq.c
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@ -51,6 +51,7 @@ struct ti_cpufreq_soc_data {
unsigned long efuse_mask;
unsigned long efuse_shift;
unsigned long rev_offset;
bool multi_regulator;
};
struct ti_cpufreq_data {
@ -58,6 +59,7 @@ struct ti_cpufreq_data {
struct device_node *opp_node;
struct regmap *syscon;
const struct ti_cpufreq_soc_data *soc_data;
struct opp_table *opp_table;
};
static unsigned long amx3_efuse_xlate(struct ti_cpufreq_data *opp_data,
@ -96,6 +98,7 @@ static struct ti_cpufreq_soc_data am3x_soc_data = {
.efuse_offset = 0x07fc,
.efuse_mask = 0x1fff,
.rev_offset = 0x600,
.multi_regulator = false,
};
static struct ti_cpufreq_soc_data am4x_soc_data = {
@ -104,6 +107,7 @@ static struct ti_cpufreq_soc_data am4x_soc_data = {
.efuse_offset = 0x0610,
.efuse_mask = 0x3f,
.rev_offset = 0x600,
.multi_regulator = false,
};
static struct ti_cpufreq_soc_data dra7_soc_data = {
@ -112,6 +116,7 @@ static struct ti_cpufreq_soc_data dra7_soc_data = {
.efuse_mask = 0xf80000,
.efuse_shift = 19,
.rev_offset = 0x204,
.multi_regulator = true,
};
/**
@ -201,7 +206,9 @@ static int ti_cpufreq_probe(struct platform_device *pdev)
u32 version[VERSION_COUNT];
struct device_node *np;
const struct of_device_id *match;
struct opp_table *ti_opp_table;
struct ti_cpufreq_data *opp_data;
const char * const reg_names[] = {"vdd", "vbb"};
int ret;
np = of_find_node_by_path("/");
@ -248,16 +255,29 @@ static int ti_cpufreq_probe(struct platform_device *pdev)
if (ret)
goto fail_put_node;
ret = PTR_ERR_OR_ZERO(dev_pm_opp_set_supported_hw(opp_data->cpu_dev,
version, VERSION_COUNT));
if (ret) {
ti_opp_table = dev_pm_opp_set_supported_hw(opp_data->cpu_dev,
version, VERSION_COUNT);
if (IS_ERR(ti_opp_table)) {
dev_err(opp_data->cpu_dev,
"Failed to set supported hardware\n");
ret = PTR_ERR(ti_opp_table);
goto fail_put_node;
}
of_node_put(opp_data->opp_node);
opp_data->opp_table = ti_opp_table;
if (opp_data->soc_data->multi_regulator) {
ti_opp_table = dev_pm_opp_set_regulators(opp_data->cpu_dev,
reg_names,
ARRAY_SIZE(reg_names));
if (IS_ERR(ti_opp_table)) {
dev_pm_opp_put_supported_hw(opp_data->opp_table);
ret = PTR_ERR(ti_opp_table);
goto fail_put_node;
}
}
of_node_put(opp_data->opp_node);
register_cpufreq_dt:
platform_device_register_simple("cpufreq-dt", -1, NULL, 0);