diff options
Diffstat (limited to 'drivers/cpufreq/qcom-cpufreq-hw.c')
| -rw-r--r-- | drivers/cpufreq/qcom-cpufreq-hw.c | 144 |
1 files changed, 90 insertions, 54 deletions
diff --git a/drivers/cpufreq/qcom-cpufreq-hw.c b/drivers/cpufreq/qcom-cpufreq-hw.c index 3fb044b907a8..9ed5341dc515 100644 --- a/drivers/cpufreq/qcom-cpufreq-hw.c +++ b/drivers/cpufreq/qcom-cpufreq-hw.c @@ -19,18 +19,23 @@ #define LUT_L_VAL GENMASK(7, 0) #define LUT_CORE_COUNT GENMASK(18, 16) #define LUT_VOLT GENMASK(11, 0) -#define LUT_ROW_SIZE 32 #define CLK_HW_DIV 2 #define LUT_TURBO_IND 1 -/* Register offsets */ -#define REG_ENABLE 0x0 -#define REG_FREQ_LUT 0x110 -#define REG_VOLT_LUT 0x114 -#define REG_PERF_STATE 0x920 +struct qcom_cpufreq_soc_data { + u32 reg_enable; + u32 reg_freq_lut; + u32 reg_volt_lut; + u32 reg_perf_state; + u8 lut_row_size; +}; + +struct qcom_cpufreq_data { + void __iomem *base; + const struct qcom_cpufreq_soc_data *soc_data; +}; static unsigned long cpu_hw_rate, xo_rate; -static struct platform_device *global_pdev; static bool icc_scaling_enabled; static int qcom_cpufreq_set_bw(struct cpufreq_policy *policy, @@ -77,22 +82,22 @@ static int qcom_cpufreq_update_opp(struct device *cpu_dev, static int qcom_cpufreq_hw_target_index(struct cpufreq_policy *policy, unsigned int index) { - void __iomem *perf_state_reg = policy->driver_data; + 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; - writel_relaxed(index, perf_state_reg); + writel_relaxed(index, data->base + soc_data->reg_perf_state); if (icc_scaling_enabled) qcom_cpufreq_set_bw(policy, freq); - arch_set_freq_scale(policy->related_cpus, freq, - policy->cpuinfo.max_freq); return 0; } static unsigned int qcom_cpufreq_hw_get(unsigned int cpu) { - void __iomem *perf_state_reg; + struct qcom_cpufreq_data *data; + const struct qcom_cpufreq_soc_data *soc_data; struct cpufreq_policy *policy; unsigned int index; @@ -100,9 +105,10 @@ static unsigned int qcom_cpufreq_hw_get(unsigned int cpu) if (!policy) return 0; - perf_state_reg = policy->driver_data; + data = policy->driver_data; + soc_data = data->soc_data; - index = readl_relaxed(perf_state_reg); + index = readl_relaxed(data->base + soc_data->reg_perf_state); index = min(index, LUT_MAX_ENTRIES - 1); return policy->freq_table[index].frequency; @@ -111,23 +117,18 @@ static unsigned int qcom_cpufreq_hw_get(unsigned int cpu) static unsigned int qcom_cpufreq_hw_fast_switch(struct cpufreq_policy *policy, unsigned int target_freq) { - void __iomem *perf_state_reg = policy->driver_data; + struct qcom_cpufreq_data *data = policy->driver_data; + const struct qcom_cpufreq_soc_data *soc_data = data->soc_data; unsigned int index; - unsigned long freq; index = policy->cached_resolved_idx; - writel_relaxed(index, perf_state_reg); + writel_relaxed(index, data->base + soc_data->reg_perf_state); - freq = policy->freq_table[index].frequency; - arch_set_freq_scale(policy->related_cpus, freq, - policy->cpuinfo.max_freq); - - return freq; + return policy->freq_table[index].frequency; } static int qcom_cpufreq_hw_read_lut(struct device *cpu_dev, - struct cpufreq_policy *policy, - void __iomem *base) + struct cpufreq_policy *policy) { u32 data, src, lval, i, core_count, prev_freq = 0, freq; u32 volt; @@ -135,6 +136,8 @@ static int qcom_cpufreq_hw_read_lut(struct device *cpu_dev, struct dev_pm_opp *opp; unsigned long rate; int ret; + struct qcom_cpufreq_data *drv_data = policy->driver_data; + const struct qcom_cpufreq_soc_data *soc_data = drv_data->soc_data; table = kcalloc(LUT_MAX_ENTRIES + 1, sizeof(*table), GFP_KERNEL); if (!table) @@ -161,14 +164,14 @@ static int qcom_cpufreq_hw_read_lut(struct device *cpu_dev, } for (i = 0; i < LUT_MAX_ENTRIES; i++) { - data = readl_relaxed(base + REG_FREQ_LUT + - i * LUT_ROW_SIZE); + data = readl_relaxed(drv_data->base + soc_data->reg_freq_lut + + i * soc_data->lut_row_size); src = FIELD_GET(LUT_SRC, data); lval = FIELD_GET(LUT_L_VAL, data); core_count = FIELD_GET(LUT_CORE_COUNT, data); - data = readl_relaxed(base + REG_VOLT_LUT + - i * LUT_ROW_SIZE); + data = readl_relaxed(drv_data->base + soc_data->reg_volt_lut + + i * soc_data->lut_row_size); volt = FIELD_GET(LUT_VOLT, data) * 1000; if (src) @@ -177,10 +180,15 @@ static int qcom_cpufreq_hw_read_lut(struct device *cpu_dev, freq = cpu_hw_rate / 1000; if (freq != prev_freq && core_count != LUT_TURBO_IND) { - table[i].frequency = freq; - qcom_cpufreq_update_opp(cpu_dev, freq, volt); - dev_dbg(cpu_dev, "index=%d freq=%d, core_count %d\n", i, + if (!qcom_cpufreq_update_opp(cpu_dev, freq, volt)) { + table[i].frequency = freq; + dev_dbg(cpu_dev, "index=%d freq=%d, core_count %d\n", i, freq, core_count); + } else { + dev_warn(cpu_dev, "failed to update OPP for freq=%d\n", freq); + table[i].frequency = CPUFREQ_ENTRY_INVALID; + } + } else if (core_count == LUT_TURBO_IND) { table[i].frequency = CPUFREQ_ENTRY_INVALID; } @@ -197,9 +205,13 @@ static int qcom_cpufreq_hw_read_lut(struct device *cpu_dev, * as the boost frequency */ if (prev->frequency == CPUFREQ_ENTRY_INVALID) { - prev->frequency = prev_freq; - prev->flags = CPUFREQ_BOOST_FREQ; - qcom_cpufreq_update_opp(cpu_dev, prev_freq, volt); + if (!qcom_cpufreq_update_opp(cpu_dev, prev_freq, volt)) { + prev->frequency = prev_freq; + prev->flags = CPUFREQ_BOOST_FREQ; + } else { + dev_warn(cpu_dev, "failed to update OPP for freq=%d\n", + freq); + } } break; @@ -238,14 +250,38 @@ static void qcom_get_related_cpus(int index, struct cpumask *m) } } +static const struct qcom_cpufreq_soc_data qcom_soc_data = { + .reg_enable = 0x0, + .reg_freq_lut = 0x110, + .reg_volt_lut = 0x114, + .reg_perf_state = 0x920, + .lut_row_size = 32, +}; + +static const struct qcom_cpufreq_soc_data epss_soc_data = { + .reg_enable = 0x0, + .reg_freq_lut = 0x100, + .reg_volt_lut = 0x200, + .reg_perf_state = 0x320, + .lut_row_size = 4, +}; + +static const struct of_device_id qcom_cpufreq_hw_match[] = { + { .compatible = "qcom,cpufreq-hw", .data = &qcom_soc_data }, + { .compatible = "qcom,cpufreq-epss", .data = &epss_soc_data }, + {} +}; +MODULE_DEVICE_TABLE(of, qcom_cpufreq_hw_match); + static int qcom_cpufreq_hw_cpu_init(struct cpufreq_policy *policy) { - struct device *dev = &global_pdev->dev; + struct platform_device *pdev = cpufreq_get_driver_data(); + struct device *dev = &pdev->dev; struct of_phandle_args args; struct device_node *cpu_np; struct device *cpu_dev; - struct resource *res; void __iomem *base; + struct qcom_cpufreq_data *data; int ret, index; cpu_dev = get_cpu_device(policy->cpu); @@ -267,16 +303,21 @@ static int qcom_cpufreq_hw_cpu_init(struct cpufreq_policy *policy) index = args.args[0]; - res = platform_get_resource(global_pdev, IORESOURCE_MEM, index); - if (!res) - return -ENODEV; + base = devm_platform_ioremap_resource(pdev, index); + if (IS_ERR(base)) + return PTR_ERR(base); - base = devm_ioremap(dev, res->start, resource_size(res)); - if (!base) - return -ENOMEM; + data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); + if (!data) { + ret = -ENOMEM; + goto error; + } + + data->soc_data = of_device_get_match_data(&pdev->dev); + data->base = base; /* HW should be in enabled state to proceed */ - if (!(readl_relaxed(base + REG_ENABLE) & 0x1)) { + if (!(readl_relaxed(base + data->soc_data->reg_enable) & 0x1)) { dev_err(dev, "Domain-%d cpufreq hardware not enabled\n", index); ret = -ENODEV; goto error; @@ -289,9 +330,9 @@ static int qcom_cpufreq_hw_cpu_init(struct cpufreq_policy *policy) goto error; } - policy->driver_data = base + REG_PERF_STATE; + policy->driver_data = data; - ret = qcom_cpufreq_hw_read_lut(cpu_dev, policy, base); + ret = qcom_cpufreq_hw_read_lut(cpu_dev, policy); if (ret) { dev_err(dev, "Domain-%d failed to read LUT\n", index); goto error; @@ -315,12 +356,13 @@ error: static int qcom_cpufreq_hw_cpu_exit(struct cpufreq_policy *policy) { struct device *cpu_dev = get_cpu_device(policy->cpu); - void __iomem *base = policy->driver_data - REG_PERF_STATE; + struct qcom_cpufreq_data *data = policy->driver_data; + struct platform_device *pdev = cpufreq_get_driver_data(); dev_pm_opp_remove_all_dynamic(cpu_dev); dev_pm_opp_of_cpumask_remove_table(policy->related_cpus); kfree(policy->freq_table); - devm_iounmap(&global_pdev->dev, base); + devm_iounmap(&pdev->dev, data->base); return 0; } @@ -365,7 +407,7 @@ static int qcom_cpufreq_hw_driver_probe(struct platform_device *pdev) cpu_hw_rate = clk_get_rate(clk) / CLK_HW_DIV; clk_put(clk); - global_pdev = pdev; + cpufreq_qcom_hw_driver.driver_data = pdev; /* Check for optional interconnect paths on CPU0 */ cpu_dev = get_cpu_device(0); @@ -390,12 +432,6 @@ static int qcom_cpufreq_hw_driver_remove(struct platform_device *pdev) return cpufreq_unregister_driver(&cpufreq_qcom_hw_driver); } -static const struct of_device_id qcom_cpufreq_hw_match[] = { - { .compatible = "qcom,cpufreq-hw" }, - {} -}; -MODULE_DEVICE_TABLE(of, qcom_cpufreq_hw_match); - static struct platform_driver qcom_cpufreq_hw_driver = { .probe = qcom_cpufreq_hw_driver_probe, .remove = qcom_cpufreq_hw_driver_remove, |