+++ /dev/null
-From patchwork Fri Dec 8 09:42:29 2017
-Content-Type: text/plain; charset="utf-8"
-MIME-Version: 1.0
-Content-Transfer-Encoding: 7bit
-Subject: [v4,11/12] cpufreq: Add module to register cpufreq on Krait CPUs
-From: Sricharan R <sricharan@codeaurora.org>
-X-Patchwork-Id: 10102075
-Message-Id: <1512726150-7204-12-git-send-email-sricharan@codeaurora.org>
-To: mturquette@baylibre.com, sboyd@codeaurora.org,
- devicetree@vger.kernel.org, linux-pm@vger.kernel.org,
- linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org,
- viresh.kumar@linaro.org, linux-arm-kernel@lists.infradead.org
-Cc: sricharan@codeaurora.org
-Date: Fri, 8 Dec 2017 15:12:29 +0530
-
-From: Stephen Boyd <sboyd@codeaurora.org>
-
-Register a cpufreq-generic device whenever we detect that a
-"qcom,krait" compatible CPU is present in DT.
-
-Cc: <devicetree@vger.kernel.org>
-Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
----
- .../devicetree/bindings/arm/msm/qcom,pvs.txt | 38 ++++
- drivers/cpufreq/Kconfig.arm | 9 +
- drivers/cpufreq/Makefile | 1 +
- drivers/cpufreq/qcom-cpufreq.c | 204 +++++++++++++++++++++
- 4 files changed, 252 insertions(+)
- create mode 100644 Documentation/devicetree/bindings/arm/msm/qcom,pvs.txt
- create mode 100644 drivers/cpufreq/qcom-cpufreq.c
-
---- /dev/null
-+++ b/Documentation/devicetree/bindings/arm/msm/qcom,pvs.txt
-@@ -0,0 +1,38 @@
-+Qualcomm Process Voltage Scaling Tables
-+
-+The node name is required to be "qcom,pvs". There shall only be one
-+such node present in the root of the tree.
-+
-+PROPERTIES
-+
-+- qcom,pvs-format-a or qcom,pvs-format-b:
-+ Usage: required
-+ Value type: <empty>
-+ Definition: Indicates the format of qcom,speedX-pvsY-bin-vZ properties.
-+ If qcom,pvs-format-a is used the table is two columns
-+ (frequency and voltage in that order). If qcom,pvs-format-b is used the table is three columns (frequency, voltage,
-+ and current in that order).
-+
-+- qcom,speedX-pvsY-bin-vZ:
-+ Usage: required
-+ Value type: <prop-encoded-array>
-+ Definition: The PVS table corresponding to the speed bin X, pvs bin Y,
-+ and version Z.
-+Example:
-+
-+ qcom,pvs {
-+ qcom,pvs-format-a;
-+ qcom,speed0-pvs0-bin-v0 =
-+ < 384000000 950000 >,
-+ < 486000000 975000 >,
-+ < 594000000 1000000 >,
-+ < 702000000 1025000 >,
-+ < 810000000 1075000 >,
-+ < 918000000 1100000 >,
-+ < 1026000000 1125000 >,
-+ < 1134000000 1175000 >,
-+ < 1242000000 1200000 >,
-+ < 1350000000 1225000 >,
-+ < 1458000000 1237500 >,
-+ < 1512000000 1250000 >;
-+ };
---- a/drivers/cpufreq/Kconfig.arm
-+++ b/drivers/cpufreq/Kconfig.arm
-@@ -121,6 +121,15 @@ config ARM_QCOM_CPUFREQ_KRYO
-
- If in doubt, say N.
-
-+config ARM_QCOM_CPUFREQ
-+ tristate "Qualcomm based"
-+ depends on ARCH_QCOM
-+ select PM_OPP
-+ help
-+ This adds the CPUFreq driver for Qualcomm SoC based boards.
-+
-+ If in doubt, say N.
-+
- config ARM_S3C_CPUFREQ
- bool
- help
---- a/drivers/cpufreq/Makefile
-+++ b/drivers/cpufreq/Makefile
-@@ -64,6 +64,7 @@ obj-$(CONFIG_MACH_MVEBU_V7) += mvebu-cp
- obj-$(CONFIG_ARM_OMAP2PLUS_CPUFREQ) += omap-cpufreq.o
- obj-$(CONFIG_ARM_PXA2xx_CPUFREQ) += pxa2xx-cpufreq.o
- obj-$(CONFIG_PXA3xx) += pxa3xx-cpufreq.o
-+obj-$(CONFIG_ARM_QCOM_CPUFREQ) += qcom-cpufreq.o
- obj-$(CONFIG_ARM_QCOM_CPUFREQ_KRYO) += qcom-cpufreq-kryo.o
- obj-$(CONFIG_ARM_S3C2410_CPUFREQ) += s3c2410-cpufreq.o
- obj-$(CONFIG_ARM_S3C2412_CPUFREQ) += s3c2412-cpufreq.o
---- /dev/null
-+++ b/drivers/cpufreq/qcom-cpufreq.c
-@@ -0,0 +1,204 @@
-+/* Copyright (c) 2014, The Linux Foundation. All rights reserved.
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 and
-+ * only version 2 as published by the Free Software Foundation.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ */
-+
-+#include <linux/cpu.h>
-+#include <linux/err.h>
-+#include <linux/init.h>
-+#include <linux/io.h>
-+#include <linux/kernel.h>
-+#include <linux/module.h>
-+#include <linux/of.h>
-+#include <linux/platform_device.h>
-+#include <linux/pm_opp.h>
-+#include <linux/slab.h>
-+#include "cpufreq-dt.h"
-+
-+static void __init get_krait_bin_format_a(int *speed, int *pvs, int *pvs_ver)
-+{
-+ void __iomem *base;
-+ u32 pte_efuse;
-+
-+ *speed = *pvs = *pvs_ver = 0;
-+
-+ base = ioremap(0x007000c0, 4);
-+ if (!base) {
-+ pr_warn("Unable to read efuse data. Defaulting to 0!\n");
-+ return;
-+ }
-+
-+ pte_efuse = readl_relaxed(base);
-+ iounmap(base);
-+
-+ *speed = pte_efuse & 0xf;
-+ if (*speed == 0xf)
-+ *speed = (pte_efuse >> 4) & 0xf;
-+
-+ if (*speed == 0xf) {
-+ *speed = 0;
-+ pr_warn("Speed bin: Defaulting to %d\n", *speed);
-+ } else {
-+ pr_info("Speed bin: %d\n", *speed);
-+ }
-+
-+ *pvs = (pte_efuse >> 10) & 0x7;
-+ if (*pvs == 0x7)
-+ *pvs = (pte_efuse >> 13) & 0x7;
-+
-+ if (*pvs == 0x7) {
-+ *pvs = 0;
-+ pr_warn("PVS bin: Defaulting to %d\n", *pvs);
-+ } else {
-+ pr_info("PVS bin: %d\n", *pvs);
-+ }
-+}
-+
-+static void __init get_krait_bin_format_b(int *speed, int *pvs, int *pvs_ver)
-+{
-+ u32 pte_efuse, redundant_sel;
-+ void __iomem *base;
-+
-+ *speed = 0;
-+ *pvs = 0;
-+ *pvs_ver = 0;
-+
-+ base = ioremap(0xfc4b80b0, 8);
-+ if (!base) {
-+ pr_warn("Unable to read efuse data. Defaulting to 0!\n");
-+ return;
-+ }
-+
-+ pte_efuse = readl_relaxed(base);
-+ redundant_sel = (pte_efuse >> 24) & 0x7;
-+ *speed = pte_efuse & 0x7;
-+ /* 4 bits of PVS are in efuse register bits 31, 8-6. */
-+ *pvs = ((pte_efuse >> 28) & 0x8) | ((pte_efuse >> 6) & 0x7);
-+ *pvs_ver = (pte_efuse >> 4) & 0x3;
-+
-+ switch (redundant_sel) {
-+ case 1:
-+ *speed = (pte_efuse >> 27) & 0xf;
-+ break;
-+ case 2:
-+ *pvs = (pte_efuse >> 27) & 0xf;
-+ break;
-+ }
-+
-+ /* Check SPEED_BIN_BLOW_STATUS */
-+ if (pte_efuse & BIT(3)) {
-+ pr_info("Speed bin: %d\n", *speed);
-+ } else {
-+ pr_warn("Speed bin not set. Defaulting to 0!\n");
-+ *speed = 0;
-+ }
-+
-+ /* Check PVS_BLOW_STATUS */
-+ pte_efuse = readl_relaxed(base + 0x4) & BIT(21);
-+ if (pte_efuse) {
-+ pr_info("PVS bin: %d\n", *pvs);
-+ } else {
-+ pr_warn("PVS bin not set. Defaulting to 0!\n");
-+ *pvs = 0;
-+ }
-+
-+ pr_info("PVS version: %d\n", *pvs_ver);
-+ iounmap(base);
-+}
-+
-+static int __init qcom_cpufreq_populate_opps(void)
-+{
-+ int len, rows, cols, i, k, speed, pvs, pvs_ver;
-+ char table_name[] = "qcom,speedXX-pvsXX-bin-vXX";
-+ struct device_node *np;
-+ struct device *dev;
-+ int cpu = 0;
-+
-+ np = of_find_node_by_name(NULL, "qcom,pvs");
-+ if (!np)
-+ return -ENODEV;
-+
-+ if (of_property_read_bool(np, "qcom,pvs-format-a")) {
-+ get_krait_bin_format_a(&speed, &pvs, &pvs_ver);
-+ cols = 2;
-+ } else if (of_property_read_bool(np, "qcom,pvs-format-b")) {
-+ get_krait_bin_format_b(&speed, &pvs, &pvs_ver);
-+ cols = 3;
-+ } else {
-+ return -ENODEV;
-+ }
-+
-+ snprintf(table_name, sizeof(table_name),
-+ "qcom,speed%d-pvs%d-bin-v%d", speed, pvs, pvs_ver);
-+
-+ if (!of_find_property(np, table_name, &len))
-+ return -EINVAL;
-+
-+ len /= sizeof(u32);
-+ if (len % cols || len == 0)
-+ return -EINVAL;
-+
-+ rows = len / cols;
-+
-+ for (i = 0, k = 0; i < rows; i++) {
-+ u32 freq, volt;
-+
-+ of_property_read_u32_index(np, table_name, k++, &freq);
-+ of_property_read_u32_index(np, table_name, k++, &volt);
-+ while (k % cols)
-+ k++; /* Skip uA entries if present */
-+ for (cpu = 0; cpu < num_possible_cpus(); cpu++) {
-+ dev = get_cpu_device(cpu);
-+ if (!dev)
-+ return -ENODEV;
-+ if (dev_pm_opp_add(dev, freq, volt))
-+ pr_warn("failed to add OPP %u\n", freq);
-+ }
-+ }
-+
-+ return 0;
-+}
-+
-+static int __init qcom_cpufreq_driver_init(void)
-+{
-+ struct cpufreq_dt_platform_data pdata = { .independent_clocks = true };
-+ struct platform_device_info devinfo = {
-+ .name = "cpufreq-dt",
-+ .data = &pdata,
-+ .size_data = sizeof(pdata),
-+ };
-+ struct device *cpu_dev;
-+ struct device_node *np;
-+ int ret;
-+
-+ cpu_dev = get_cpu_device(0);
-+ if (!cpu_dev)
-+ return -ENODEV;
-+
-+ np = of_node_get(cpu_dev->of_node);
-+ if (!np)
-+ return -ENOENT;
-+
-+ if (!of_device_is_compatible(np, "qcom,krait")) {
-+ of_node_put(np);
-+ return -ENODEV;
-+ }
-+ of_node_put(np);
-+
-+ ret = qcom_cpufreq_populate_opps();
-+ if (ret)
-+ return ret;
-+
-+ return PTR_ERR_OR_ZERO(platform_device_register_full(&devinfo));
-+}
-+module_init(qcom_cpufreq_driver_init);
-+
-+MODULE_DESCRIPTION("Qualcomm CPUfreq driver");
-+MODULE_LICENSE("GPL v2");
+++ /dev/null
-From patchwork Fri Dec 8 09:42:30 2017
-Content-Type: text/plain; charset="utf-8"
-MIME-Version: 1.0
-Content-Transfer-Encoding: 7bit
-Subject: [v4,12/12] cpufreq: dt: Reintroduce independent_clocks platform data
-From: Sricharan R <sricharan@codeaurora.org>
-X-Patchwork-Id: 10102073
-Message-Id: <1512726150-7204-13-git-send-email-sricharan@codeaurora.org>
-To: mturquette@baylibre.com, sboyd@codeaurora.org,
- devicetree@vger.kernel.org, linux-pm@vger.kernel.org,
- linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org,
- viresh.kumar@linaro.org, linux-arm-kernel@lists.infradead.org
-Cc: sricharan@codeaurora.org
-Date: Fri, 8 Dec 2017 15:12:30 +0530
-
-The Platform data was removed earlier by,
-'commit eb96924acddc ("cpufreq: dt: Kill platform-data")'
-since there were no users at that time.
-Now this is required when the each of the cpu clocks
-can be scaled independently, which is the case
-for krait cores. So reintroduce it.
-
-Signed-off-by: Sricharan R <sricharan@codeaurora.org>
----
- drivers/cpufreq/cpufreq-dt.c | 7 ++++++-
- drivers/cpufreq/cpufreq-dt.h | 6 ++++++
- 2 files changed, 12 insertions(+), 1 deletion(-)
-
---- a/drivers/cpufreq/cpufreq-dt.c
-+++ b/drivers/cpufreq/cpufreq-dt.c
-@@ -239,7 +239,10 @@ static int cpufreq_init(struct cpufreq_p
- }
-
- if (fallback) {
-- cpumask_setall(policy->cpus);
-+ struct cpufreq_dt_platform_data *pd = cpufreq_get_driver_data();
-+
-+ if (!pd || !pd->independent_clocks)
-+ cpumask_setall(policy->cpus);
-
- /*
- * OPP tables are initialized only for policy->cpu, do it for
-@@ -359,6 +362,8 @@ static int dt_cpufreq_probe(struct platf
- dt_cpufreq_driver.suspend = data->suspend;
- }
-
-+ dt_cpufreq_driver.driver_data = data;
-+
- ret = cpufreq_register_driver(&dt_cpufreq_driver);
- if (ret)
- dev_err(&pdev->dev, "failed register driver: %d\n", ret);
---- a/drivers/cpufreq/cpufreq-dt.h
-+++ b/drivers/cpufreq/cpufreq-dt.h
-@@ -15,6 +15,12 @@
- struct cpufreq_policy;
-
- struct cpufreq_dt_platform_data {
-+ /*
-+ * True when each CPU has its own clock to control its
-+ * frequency, false when all CPUs are controlled by a single
-+ * clock.
-+ */
-+ bool independent_clocks;
- bool have_governor_per_policy;
-
- int (*suspend)(struct cpufreq_policy *policy);
projects / openwrt / openwrt.git / commitdiff