diff options
Diffstat (limited to 'drivers/cpufreq/qcom-cpufreq-hw.c')
| -rw-r--r-- | drivers/cpufreq/qcom-cpufreq-hw.c | 55 |
1 files changed, 47 insertions, 8 deletions
diff --git a/drivers/cpufreq/qcom-cpufreq-hw.c b/drivers/cpufreq/qcom-cpufreq-hw.c index 9ed5341dc515..dcc6546e2759 100644 --- a/drivers/cpufreq/qcom-cpufreq-hw.c +++ b/drivers/cpufreq/qcom-cpufreq-hw.c @@ -12,6 +12,7 @@ #include <linux/of_address.h> #include <linux/of_platform.h> #include <linux/pm_opp.h> +#include <linux/regmap.h> #include <linux/slab.h> #define LUT_MAX_ENTRIES 40U @@ -32,6 +33,7 @@ struct qcom_cpufreq_soc_data { struct qcom_cpufreq_data { void __iomem *base; + struct regmap *regmap; const struct qcom_cpufreq_soc_data *soc_data; }; @@ -85,8 +87,11 @@ static int qcom_cpufreq_hw_target_index(struct cpufreq_policy *policy, struct qcom_cpufreq_data *data = policy->driver_data; const struct qcom_cpufreq_soc_data *soc_data = data->soc_data; unsigned long freq = policy->freq_table[index].frequency; + int ret; - writel_relaxed(index, data->base + soc_data->reg_perf_state); + ret = regmap_write(data->regmap, soc_data->reg_perf_state, index); + if (ret) + return ret; if (icc_scaling_enabled) qcom_cpufreq_set_bw(policy, freq); @@ -100,6 +105,7 @@ static unsigned int qcom_cpufreq_hw_get(unsigned int cpu) const struct qcom_cpufreq_soc_data *soc_data; struct cpufreq_policy *policy; unsigned int index; + int ret; policy = cpufreq_cpu_get_raw(cpu); if (!policy) @@ -108,7 +114,10 @@ static unsigned int qcom_cpufreq_hw_get(unsigned int cpu) data = policy->driver_data; soc_data = data->soc_data; - index = readl_relaxed(data->base + soc_data->reg_perf_state); + ret = regmap_read(data->regmap, soc_data->reg_perf_state, &index); + if (ret) + return 0; + index = min(index, LUT_MAX_ENTRIES - 1); return policy->freq_table[index].frequency; @@ -120,9 +129,12 @@ static unsigned int qcom_cpufreq_hw_fast_switch(struct cpufreq_policy *policy, struct qcom_cpufreq_data *data = policy->driver_data; const struct qcom_cpufreq_soc_data *soc_data = data->soc_data; unsigned int index; + int ret; index = policy->cached_resolved_idx; - writel_relaxed(index, data->base + soc_data->reg_perf_state); + ret = regmap_write(data->regmap, soc_data->reg_perf_state, index); + if (ret) + return 0; return policy->freq_table[index].frequency; } @@ -164,14 +176,24 @@ static int qcom_cpufreq_hw_read_lut(struct device *cpu_dev, } for (i = 0; i < LUT_MAX_ENTRIES; i++) { - data = readl_relaxed(drv_data->base + soc_data->reg_freq_lut + - i * soc_data->lut_row_size); + ret = regmap_read(drv_data->regmap, soc_data->reg_freq_lut + + i * soc_data->lut_row_size, &data); + if (ret) { + kfree(table); + return ret; + } + src = FIELD_GET(LUT_SRC, data); lval = FIELD_GET(LUT_L_VAL, data); core_count = FIELD_GET(LUT_CORE_COUNT, data); - data = readl_relaxed(drv_data->base + soc_data->reg_volt_lut + - i * soc_data->lut_row_size); + ret = regmap_read(drv_data->regmap, soc_data->reg_volt_lut + + i * soc_data->lut_row_size, &data); + if (ret) { + kfree(table); + return ret; + } + volt = FIELD_GET(LUT_VOLT, data) * 1000; if (src) @@ -250,6 +272,13 @@ static void qcom_get_related_cpus(int index, struct cpumask *m) } } +static struct regmap_config qcom_cpufreq_regmap = { + .reg_bits = 32, + .reg_stride = 4, + .val_bits = 32, + .fast_io = true, +}; + static const struct qcom_cpufreq_soc_data qcom_soc_data = { .reg_enable = 0x0, .reg_freq_lut = 0x110, @@ -283,6 +312,7 @@ static int qcom_cpufreq_hw_cpu_init(struct cpufreq_policy *policy) void __iomem *base; struct qcom_cpufreq_data *data; int ret, index; + u32 val; cpu_dev = get_cpu_device(policy->cpu); if (!cpu_dev) { @@ -315,9 +345,18 @@ static int qcom_cpufreq_hw_cpu_init(struct cpufreq_policy *policy) data->soc_data = of_device_get_match_data(&pdev->dev); data->base = base; + data->regmap = devm_regmap_init_mmio(dev, base, &qcom_cpufreq_regmap); + if (IS_ERR(data->regmap)) { + ret = PTR_ERR(data->regmap); + goto error; + } /* HW should be in enabled state to proceed */ - if (!(readl_relaxed(base + data->soc_data->reg_enable) & 0x1)) { + ret = regmap_read(data->regmap, data->soc_data->reg_enable, &val); + if (ret) + goto error; + + if (!(val & 0x1)) { dev_err(dev, "Domain-%d cpufreq hardware not enabled\n", index); ret = -ENODEV; goto error; |