Lines Matching full:emc
47 * to control the EMC frequency. The top-level directory can be found here:
49 * /sys/kernel/debug/emc
54 * EMC frequencies.
58 * configured EMC frequency, this will cause the frequency to be
63 * the value is lower than the currently configured EMC frequency, this
68 static bool tegra186_emc_validate_rate(struct tegra186_emc *emc, in tegra186_emc_validate_rate() argument
73 for (i = 0; i < emc->num_dvfs; i++) in tegra186_emc_validate_rate()
74 if (rate == emc->dvfs[i].rate) in tegra186_emc_validate_rate()
83 struct tegra186_emc *emc = s->private; in tegra186_emc_debug_available_rates_show() local
87 for (i = 0; i < emc->num_dvfs; i++) { in tegra186_emc_debug_available_rates_show()
88 seq_printf(s, "%s%lu", prefix, emc->dvfs[i].rate); in tegra186_emc_debug_available_rates_show()
100 struct tegra186_emc *emc = data; in tegra186_emc_debug_min_rate_get() local
102 *rate = emc->debugfs.min_rate; in tegra186_emc_debug_min_rate_get()
109 struct tegra186_emc *emc = data; in tegra186_emc_debug_min_rate_set() local
112 if (!tegra186_emc_validate_rate(emc, rate)) in tegra186_emc_debug_min_rate_set()
115 err = clk_set_min_rate(emc->clk, rate); in tegra186_emc_debug_min_rate_set()
119 emc->debugfs.min_rate = rate; in tegra186_emc_debug_min_rate_set()
130 struct tegra186_emc *emc = data; in tegra186_emc_debug_max_rate_get() local
132 *rate = emc->debugfs.max_rate; in tegra186_emc_debug_max_rate_get()
139 struct tegra186_emc *emc = data; in tegra186_emc_debug_max_rate_set() local
142 if (!tegra186_emc_validate_rate(emc, rate)) in tegra186_emc_debug_max_rate_set()
145 err = clk_set_max_rate(emc->clk, rate); in tegra186_emc_debug_max_rate_set()
149 emc->debugfs.max_rate = rate; in tegra186_emc_debug_max_rate_set()
158 static int tegra186_emc_get_emc_dvfs_latency(struct tegra186_emc *emc) in tegra186_emc_get_emc_dvfs_latency() argument
172 err = tegra_bpmp_transfer(emc->bpmp, &msg); in tegra186_emc_get_emc_dvfs_latency()
174 dev_err(emc->dev, "failed to EMC DVFS pairs: %d\n", err); in tegra186_emc_get_emc_dvfs_latency()
178 dev_err(emc->dev, "EMC DVFS MRQ failed: %d (BPMP error code)\n", msg.rx.ret); in tegra186_emc_get_emc_dvfs_latency()
182 emc->debugfs.min_rate = ULONG_MAX; in tegra186_emc_get_emc_dvfs_latency()
183 emc->debugfs.max_rate = 0; in tegra186_emc_get_emc_dvfs_latency()
185 emc->num_dvfs = response.num_pairs; in tegra186_emc_get_emc_dvfs_latency()
187 emc->dvfs = devm_kmalloc_array(emc->dev, emc->num_dvfs, sizeof(*emc->dvfs), GFP_KERNEL); in tegra186_emc_get_emc_dvfs_latency()
188 if (!emc->dvfs) in tegra186_emc_get_emc_dvfs_latency()
191 dev_dbg(emc->dev, "%u DVFS pairs:\n", emc->num_dvfs); in tegra186_emc_get_emc_dvfs_latency()
193 for (i = 0; i < emc->num_dvfs; i++) { in tegra186_emc_get_emc_dvfs_latency()
194 emc->dvfs[i].rate = response.pairs[i].freq * 1000; in tegra186_emc_get_emc_dvfs_latency()
195 emc->dvfs[i].latency = response.pairs[i].latency; in tegra186_emc_get_emc_dvfs_latency()
197 if (emc->dvfs[i].rate < emc->debugfs.min_rate) in tegra186_emc_get_emc_dvfs_latency()
198 emc->debugfs.min_rate = emc->dvfs[i].rate; in tegra186_emc_get_emc_dvfs_latency()
200 if (emc->dvfs[i].rate > emc->debugfs.max_rate) in tegra186_emc_get_emc_dvfs_latency()
201 emc->debugfs.max_rate = emc->dvfs[i].rate; in tegra186_emc_get_emc_dvfs_latency()
203 dev_dbg(emc->dev, " %2u: %lu Hz -> %lu us\n", i, in tegra186_emc_get_emc_dvfs_latency()
204 emc->dvfs[i].rate, emc->dvfs[i].latency); in tegra186_emc_get_emc_dvfs_latency()
207 err = clk_set_rate_range(emc->clk, emc->debugfs.min_rate, emc->debugfs.max_rate); in tegra186_emc_get_emc_dvfs_latency()
209 dev_err(emc->dev, "failed to set rate range [%lu-%lu] for %pC\n", in tegra186_emc_get_emc_dvfs_latency()
210 emc->debugfs.min_rate, emc->debugfs.max_rate, emc->clk); in tegra186_emc_get_emc_dvfs_latency()
214 emc->debugfs.root = debugfs_create_dir("emc", NULL); in tegra186_emc_get_emc_dvfs_latency()
215 debugfs_create_file("available_rates", 0444, emc->debugfs.root, emc, in tegra186_emc_get_emc_dvfs_latency()
217 debugfs_create_file("min_rate", 0644, emc->debugfs.root, emc, in tegra186_emc_get_emc_dvfs_latency()
219 debugfs_create_file("max_rate", 0644, emc->debugfs.root, emc, in tegra186_emc_get_emc_dvfs_latency()
226 * tegra_emc_icc_set_bw() - Set BW api for EMC provider
227 * @src: ICC node for External Memory Controller (EMC)
263 static int tegra_emc_interconnect_init(struct tegra186_emc *emc) in tegra_emc_interconnect_init() argument
265 struct tegra_mc *mc = dev_get_drvdata(emc->dev->parent); in tegra_emc_interconnect_init()
270 emc->provider.dev = emc->dev; in tegra_emc_interconnect_init()
271 emc->provider.set = tegra_emc_icc_set_bw; in tegra_emc_interconnect_init()
272 emc->provider.data = &emc->provider; in tegra_emc_interconnect_init()
273 emc->provider.aggregate = soc->icc_ops->aggregate; in tegra_emc_interconnect_init()
274 emc->provider.xlate = tegra_emc_of_icc_xlate; in tegra_emc_interconnect_init()
275 emc->provider.get_bw = tegra_emc_icc_get_init_bw; in tegra_emc_interconnect_init()
277 icc_provider_init(&emc->provider); in tegra_emc_interconnect_init()
287 icc_node_add(node, &emc->provider); in tegra_emc_interconnect_init()
302 icc_node_add(node, &emc->provider); in tegra_emc_interconnect_init()
304 err = icc_provider_register(&emc->provider); in tegra_emc_interconnect_init()
311 icc_nodes_remove(&emc->provider); in tegra_emc_interconnect_init()
313 dev_err(emc->dev, "failed to initialize ICC: %d\n", err); in tegra_emc_interconnect_init()
321 struct tegra186_emc *emc; in tegra186_emc_probe() local
324 emc = devm_kzalloc(&pdev->dev, sizeof(*emc), GFP_KERNEL); in tegra186_emc_probe()
325 if (!emc) in tegra186_emc_probe()
328 emc->bpmp = tegra_bpmp_get(&pdev->dev); in tegra186_emc_probe()
329 if (IS_ERR(emc->bpmp)) in tegra186_emc_probe()
330 return dev_err_probe(&pdev->dev, PTR_ERR(emc->bpmp), "failed to get BPMP\n"); in tegra186_emc_probe()
332 emc->clk = devm_clk_get(&pdev->dev, "emc"); in tegra186_emc_probe()
333 if (IS_ERR(emc->clk)) { in tegra186_emc_probe()
334 err = PTR_ERR(emc->clk); in tegra186_emc_probe()
335 dev_err(&pdev->dev, "failed to get EMC clock: %d\n", err); in tegra186_emc_probe()
339 platform_set_drvdata(pdev, emc); in tegra186_emc_probe()
340 emc->dev = &pdev->dev; in tegra186_emc_probe()
342 if (tegra_bpmp_mrq_is_supported(emc->bpmp, MRQ_EMC_DVFS_LATENCY)) { in tegra186_emc_probe()
343 err = tegra186_emc_get_emc_dvfs_latency(emc); in tegra186_emc_probe()
349 if (tegra_bpmp_mrq_is_supported(emc->bpmp, MRQ_BWMGR_INT)) { in tegra186_emc_probe()
354 * earlier than BPMP. So, save the BPMP ref got from the EMC in tegra186_emc_probe()
357 mc->bpmp = emc->bpmp; in tegra186_emc_probe()
367 err = tegra_emc_interconnect_init(emc); in tegra186_emc_probe()
377 tegra_bpmp_put(emc->bpmp); in tegra186_emc_probe()
384 struct tegra186_emc *emc = platform_get_drvdata(pdev); in tegra186_emc_remove() local
386 debugfs_remove_recursive(emc->debugfs.root); in tegra186_emc_remove()
389 tegra_bpmp_put(emc->bpmp); in tegra186_emc_remove()
394 { .compatible = "nvidia,tegra186-emc" },
397 { .compatible = "nvidia,tegra194-emc" },
400 { .compatible = "nvidia,tegra234-emc" },
408 .name = "tegra186-emc",