From cfef4bcaccf35f0b80acc5c79967996b2eb88ba6 Mon Sep 17 00:00:00 2001 From: Jon Hunter Date: Wed, 2 Dec 2020 09:14:17 +0000 Subject: [PATCH] cpufreq: tegra186: Simplify cluster information lookup The CPUFREQ driver framework references each individual CPUs when getting and setting the speed. Tegra186 has 3 clusters of A57 CPUs and 1 cluster of Denver CPUs. Hence, the Tegra186 CPUFREQ driver need to know which cluster a given CPU belongs to. The logic in the Tegra186 driver can be greatly simplified by storing the cluster ID associated with each CPU in the tegra186_cpufreq_cpu structure. This allow us to completely remove the Tegra cluster info structure from the driver and simplifiy the code. Signed-off-by: Jon Hunter Signed-off-by: Viresh Kumar --- drivers/cpufreq/tegra186-cpufreq.c | 85 +++++++++----------------------------- 1 file changed, 20 insertions(+), 65 deletions(-) diff --git a/drivers/cpufreq/tegra186-cpufreq.c b/drivers/cpufreq/tegra186-cpufreq.c index 98b5f32..e566ea2 100644 --- a/drivers/cpufreq/tegra186-cpufreq.c +++ b/drivers/cpufreq/tegra186-cpufreq.c @@ -12,6 +12,7 @@ #include #include +#define TEGRA186_NUM_CLUSTERS 2 #define EDVD_OFFSET_A57(core) ((SZ_64K * 6) + (0x20 + (core) * 0x4)) #define EDVD_OFFSET_DENVER(core) ((SZ_64K * 7) + (0x20 + (core) * 0x4)) #define EDVD_CORE_VOLT_FREQ_F_SHIFT 0 @@ -19,58 +20,44 @@ #define EDVD_CORE_VOLT_FREQ_V_SHIFT 16 struct tegra186_cpufreq_cpu { + unsigned int bpmp_cluster_id; unsigned int edvd_offset; }; static const struct tegra186_cpufreq_cpu tegra186_cpus[] = { /* CPU0 - A57 Cluster */ { + .bpmp_cluster_id = 1, .edvd_offset = EDVD_OFFSET_A57(0) }, /* CPU1 - Denver Cluster */ { + .bpmp_cluster_id = 0, .edvd_offset = EDVD_OFFSET_DENVER(0) }, /* CPU2 - Denver Cluster */ { + .bpmp_cluster_id = 0, .edvd_offset = EDVD_OFFSET_DENVER(1) }, /* CPU3 - A57 Cluster */ { + .bpmp_cluster_id = 1, .edvd_offset = EDVD_OFFSET_A57(1) }, /* CPU4 - A57 Cluster */ { + .bpmp_cluster_id = 1, .edvd_offset = EDVD_OFFSET_A57(2) }, /* CPU5 - A57 Cluster */ { - .edvd_offset = EDVD_OFFSET_A57(3) - }, - -}; - -struct tegra186_cpufreq_cluster_info { - int cpus[4]; - unsigned int bpmp_cluster_id; -}; - -#define NO_CPU -1 -static const struct tegra186_cpufreq_cluster_info tegra186_clusters[] = { - /* Denver cluster */ - { - .cpus = { 1, 2, NO_CPU, NO_CPU }, - .bpmp_cluster_id = 0, - }, - /* A57 cluster */ - { - .cpus = { 0, 3, 4, 5 }, .bpmp_cluster_id = 1, + .edvd_offset = EDVD_OFFSET_A57(3) }, }; struct tegra186_cpufreq_cluster { - const struct tegra186_cpufreq_cluster_info *info; struct cpufreq_frequency_table *table; u32 ref_clk_khz; u32 div; @@ -78,8 +65,6 @@ struct tegra186_cpufreq_cluster { struct tegra186_cpufreq_data { void __iomem *regs; - - size_t num_clusters; struct tegra186_cpufreq_cluster *clusters; const struct tegra186_cpufreq_cpu *cpus; }; @@ -87,25 +72,9 @@ struct tegra186_cpufreq_data { static int tegra186_cpufreq_init(struct cpufreq_policy *policy) { struct tegra186_cpufreq_data *data = cpufreq_get_driver_data(); - unsigned int i; - - for (i = 0; i < data->num_clusters; i++) { - struct tegra186_cpufreq_cluster *cluster = &data->clusters[i]; - const struct tegra186_cpufreq_cluster_info *info = - cluster->info; - int core; - - for (core = 0; core < ARRAY_SIZE(info->cpus); core++) { - if (info->cpus[core] == policy->cpu) - break; - } - if (core == ARRAY_SIZE(info->cpus)) - continue; - - policy->freq_table = cluster->table; - break; - } + unsigned int cluster = data->cpus[policy->cpu].bpmp_cluster_id; + policy->freq_table = data->clusters[cluster].table; policy->cpuinfo.transition_latency = 300 * 1000; policy->driver_data = NULL; @@ -128,8 +97,9 @@ static int tegra186_cpufreq_set_target(struct cpufreq_policy *policy, static unsigned int tegra186_cpufreq_get(unsigned int cpu) { struct tegra186_cpufreq_data *data = cpufreq_get_driver_data(); + struct tegra186_cpufreq_cluster *cluster; struct cpufreq_policy *policy; - unsigned int i, edvd_offset, freq = 0; + unsigned int edvd_offset, cluster_id; u32 ndiv; policy = cpufreq_cpu_get(cpu); @@ -138,24 +108,11 @@ static unsigned int tegra186_cpufreq_get(unsigned int cpu) edvd_offset = data->cpus[policy->cpu].edvd_offset; ndiv = readl(data->regs + edvd_offset) & EDVD_CORE_VOLT_FREQ_F_MASK; - - for (i = 0; i < data->num_clusters; i++) { - struct tegra186_cpufreq_cluster *cluster = &data->clusters[i]; - int core; - - for (core = 0; core < ARRAY_SIZE(cluster->info->cpus); core++) { - if (cluster->info->cpus[core] != policy->cpu) - continue; - - freq = (cluster->ref_clk_khz * ndiv) / cluster->div; - goto out; - } - } - -out: + cluster_id = data->cpus[policy->cpu].bpmp_cluster_id; + cluster = &data->clusters[cluster_id]; cpufreq_cpu_put(policy); - return freq; + return (cluster->ref_clk_khz * ndiv) / cluster->div; } static struct cpufreq_driver tegra186_cpufreq_driver = { @@ -171,7 +128,7 @@ static struct cpufreq_driver tegra186_cpufreq_driver = { static struct cpufreq_frequency_table *init_vhint_table( struct platform_device *pdev, struct tegra_bpmp *bpmp, - struct tegra186_cpufreq_cluster *cluster) + struct tegra186_cpufreq_cluster *cluster, unsigned int cluster_id) { struct cpufreq_frequency_table *table; struct mrq_cpu_vhint_request req; @@ -190,7 +147,7 @@ static struct cpufreq_frequency_table *init_vhint_table( memset(&req, 0, sizeof(req)); req.addr = phys; - req.cluster_id = cluster->info->bpmp_cluster_id; + req.cluster_id = cluster_id; memset(&msg, 0, sizeof(msg)); msg.mrq = MRQ_CPU_VHINT; @@ -264,12 +221,11 @@ static int tegra186_cpufreq_probe(struct platform_device *pdev) if (!data) return -ENOMEM; - data->clusters = devm_kcalloc(&pdev->dev, ARRAY_SIZE(tegra186_clusters), + data->clusters = devm_kcalloc(&pdev->dev, TEGRA186_NUM_CLUSTERS, sizeof(*data->clusters), GFP_KERNEL); if (!data->clusters) return -ENOMEM; - data->num_clusters = ARRAY_SIZE(tegra186_clusters); data->cpus = tegra186_cpus; bpmp = tegra_bpmp_get(&pdev->dev); @@ -282,11 +238,10 @@ static int tegra186_cpufreq_probe(struct platform_device *pdev) goto put_bpmp; } - for (i = 0; i < data->num_clusters; i++) { + for (i = 0; i < TEGRA186_NUM_CLUSTERS; i++) { struct tegra186_cpufreq_cluster *cluster = &data->clusters[i]; - cluster->info = &tegra186_clusters[i]; - cluster->table = init_vhint_table(pdev, bpmp, cluster); + cluster->table = init_vhint_table(pdev, bpmp, cluster, i); if (IS_ERR(cluster->table)) { err = PTR_ERR(cluster->table); goto put_bpmp; -- 2.7.4