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authorLinus Torvalds <torvalds@linux-foundation.org>2020-08-07 23:13:09 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2020-08-07 23:13:09 +0300
commitf6235eb189706bf38c82b5fa5f2db0d21bc1dcef (patch)
treea4b49e04d5262623bc59197e39293ce5d925313f /drivers
parent2f12d44085dabf5fa5779ff0bb0aaa1b2cc768cb (diff)
parent0873ad923a05751a29a92229739ce2737c29d348 (diff)
downloadlinux-f6235eb189706bf38c82b5fa5f2db0d21bc1dcef.tar.xz
Merge tag 'pm-5.9-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull more power management updates from Rafael Wysocki: "These are mostly ARM cpufreq driver updates plus a cpufreq core cleanup, an ARM-wide change to make schedutil the default scaling governor, an intel_pstate driver fix and some runtime PM changes regarding kerneldoc comments. Specifics: - Add adaptive voltage scaling (AVS) support to the brcmstb cpufreq driver and clean it up (Florian Fainelli, Markus Mayer). - Add a new Tegra cpufreq driver and clean up the existing one (Jon Hunter, Sumit Gupta). - Add bandwidth level support to the Qcom cpufreq driver along with OPP changes (Sibi Sankar). - Clean up the sti, cpufreq-dt, ap806, CPPC cpufreq drivers (Viresh Kumar, Lee Jones, Ivan Kokshaysky, Sven Auhagen, Xin Hao). - Make schedutil the default governor for ARM (Valentin Schneider). - Fix dependency issues for the imx cpufreq driver (Walter Lozano). - Clean up cached_resolved_idx handlihng in the cpufreq core (Viresh Kumar). - Fix the intel_pstate driver to use the correct maximum frequency value when MSR_TURBO_RATIO_LIMIT is 0 (Srinivas Pandruvada). - Provide kenrneldoc comments for multiple runtime PM helpers and improve the pm_runtime_get_if_active() kerneldoc (Rafael Wysocki)" * tag 'pm-5.9-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (22 commits) cpufreq: intel_pstate: Fix cpuinfo_max_freq when MSR_TURBO_RATIO_LIMIT is 0 PM: runtime: Improve kerneldoc of pm_runtime_get_if_active() PM: runtime: Add kerneldoc comments to multiple helpers cpufreq: make schedutil the default for arm and arm64 cpufreq: cached_resolved_idx can not be negative cpufreq: Add Tegra194 cpufreq driver dt-bindings: arm: Add NVIDIA Tegra194 CPU Complex binding cpufreq: imx: Select NVMEM_IMX_OCOTP cpufreq: sti-cpufreq: Fix some formatting and misspelling issues cpufreq: tegra186: Simplify probe return path cpufreq: CPPC: Reuse caps variable in few routines cpufreq: ap806: fix cpufreq driver needs ap cpu clk cpufreq: cppc: Reorder code and remove apply_hisi_workaround variable cpufreq: dt: fix oops on armada37xx cpufreq: brcmstb-avs-cpufreq: send S2_ENTER / S2_EXIT commands to AVS cpufreq: brcmstb-avs-cpufreq: Support polling AVS firmware cpufreq: brcmstb-avs-cpufreq: more flexible interface for __issue_avs_command() cpufreq: qcom: Disable fast switch when scaling DDR/L3 cpufreq: qcom: Update the bandwidth levels on frequency change OPP: Add and export helper to set bandwidth ...
Diffstat (limited to 'drivers')
-rw-r--r--drivers/base/power/runtime.c26
-rw-r--r--drivers/cpufreq/Kconfig2
-rw-r--r--drivers/cpufreq/Kconfig.arm9
-rw-r--r--drivers/cpufreq/Makefile1
-rw-r--r--drivers/cpufreq/armada-37xx-cpufreq.c1
-rw-r--r--drivers/cpufreq/brcmstb-avs-cpufreq.c89
-rw-r--r--drivers/cpufreq/cppc_cpufreq.c95
-rw-r--r--drivers/cpufreq/cpufreq-dt-platdev.c2
-rw-r--r--drivers/cpufreq/cpufreq.c2
-rw-r--r--drivers/cpufreq/intel_pstate.c1
-rw-r--r--drivers/cpufreq/qcom-cpufreq-hw.c91
-rw-r--r--drivers/cpufreq/sti-cpufreq.c8
-rw-r--r--drivers/cpufreq/tegra186-cpufreq.c6
-rw-r--r--drivers/cpufreq/tegra194-cpufreq.c390
-rw-r--r--drivers/opp/core.c31
15 files changed, 641 insertions, 113 deletions
diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c
index 9f62790f644c..8143210a5c54 100644
--- a/drivers/base/power/runtime.c
+++ b/drivers/base/power/runtime.c
@@ -1085,24 +1085,26 @@ int __pm_runtime_resume(struct device *dev, int rpmflags)
EXPORT_SYMBOL_GPL(__pm_runtime_resume);
/**
- * pm_runtime_get_if_active - Conditionally bump up the device's usage counter.
+ * pm_runtime_get_if_active - Conditionally bump up device usage counter.
* @dev: Device to handle.
+ * @ign_usage_count: Whether or not to look at the current usage counter value.
*
- * Return -EINVAL if runtime PM is disabled for the device.
+ * Return -EINVAL if runtime PM is disabled for @dev.
*
- * Otherwise, if the device's runtime PM status is RPM_ACTIVE and either
- * ign_usage_count is true or the device's usage_count is non-zero, increment
- * the counter and return 1. Otherwise return 0 without changing the counter.
+ * Otherwise, if the runtime PM status of @dev is %RPM_ACTIVE and either
+ * @ign_usage_count is %true or the runtime PM usage counter of @dev is not
+ * zero, increment the usage counter of @dev and return 1. Otherwise, return 0
+ * without changing the usage counter.
*
- * If ign_usage_count is true, the function can be used to prevent suspending
- * the device when its runtime PM status is RPM_ACTIVE.
+ * If @ign_usage_count is %true, this function can be used to prevent suspending
+ * the device when its runtime PM status is %RPM_ACTIVE.
*
- * If ign_usage_count is false, the function can be used to prevent suspending
- * the device when both its runtime PM status is RPM_ACTIVE and its usage_count
- * is non-zero.
+ * If @ign_usage_count is %false, this function can be used to prevent
+ * suspending the device when both its runtime PM status is %RPM_ACTIVE and its
+ * runtime PM usage counter is not zero.
*
- * The caller is resposible for putting the device's usage count when ther
- * return value is greater than zero.
+ * The caller is resposible for decrementing the runtime PM usage counter of
+ * @dev after this function has returned a positive value for it.
*/
int pm_runtime_get_if_active(struct device *dev, bool ign_usage_count)
{
diff --git a/drivers/cpufreq/Kconfig b/drivers/cpufreq/Kconfig
index e91750132552..2c7171e0b001 100644
--- a/drivers/cpufreq/Kconfig
+++ b/drivers/cpufreq/Kconfig
@@ -37,7 +37,7 @@ config CPU_FREQ_STAT
choice
prompt "Default CPUFreq governor"
default CPU_FREQ_DEFAULT_GOV_USERSPACE if ARM_SA1100_CPUFREQ || ARM_SA1110_CPUFREQ
- default CPU_FREQ_DEFAULT_GOV_SCHEDUTIL if BIG_LITTLE
+ default CPU_FREQ_DEFAULT_GOV_SCHEDUTIL if ARM64 || ARM
default CPU_FREQ_DEFAULT_GOV_SCHEDUTIL if X86_INTEL_PSTATE && SMP
default CPU_FREQ_DEFAULT_GOV_PERFORMANCE
help
diff --git a/drivers/cpufreq/Kconfig.arm b/drivers/cpufreq/Kconfig.arm
index c6cbfc8baf72..cb72fb507d57 100644
--- a/drivers/cpufreq/Kconfig.arm
+++ b/drivers/cpufreq/Kconfig.arm
@@ -41,6 +41,7 @@ config ARM_ARMADA_37XX_CPUFREQ
config ARM_ARMADA_8K_CPUFREQ
tristate "Armada 8K CPUFreq driver"
depends on ARCH_MVEBU && CPUFREQ_DT
+ select ARMADA_AP_CPU_CLK
help
This enables the CPUFreq driver support for Marvell
Armada8k SOCs.
@@ -93,6 +94,7 @@ config ARM_IMX6Q_CPUFREQ
tristate "Freescale i.MX6 cpufreq support"
depends on ARCH_MXC
depends on REGULATOR_ANATOP
+ select NVMEM_IMX_OCOTP
select PM_OPP
help
This adds cpufreq driver support for Freescale i.MX6 series SoCs.
@@ -314,6 +316,13 @@ config ARM_TEGRA186_CPUFREQ
help
This adds the CPUFreq driver support for Tegra186 SOCs.
+config ARM_TEGRA194_CPUFREQ
+ tristate "Tegra194 CPUFreq support"
+ depends on ARCH_TEGRA_194_SOC && TEGRA_BPMP
+ default y
+ help
+ This adds CPU frequency driver support for Tegra194 SOCs.
+
config ARM_TI_CPUFREQ
bool "Texas Instruments CPUFreq support"
depends on ARCH_OMAP2PLUS
diff --git a/drivers/cpufreq/Makefile b/drivers/cpufreq/Makefile
index 089938ead681..f1b7e3dd6e5d 100644
--- a/drivers/cpufreq/Makefile
+++ b/drivers/cpufreq/Makefile
@@ -83,6 +83,7 @@ obj-$(CONFIG_ARM_TANGO_CPUFREQ) += tango-cpufreq.o
obj-$(CONFIG_ARM_TEGRA20_CPUFREQ) += tegra20-cpufreq.o
obj-$(CONFIG_ARM_TEGRA124_CPUFREQ) += tegra124-cpufreq.o
obj-$(CONFIG_ARM_TEGRA186_CPUFREQ) += tegra186-cpufreq.o
+obj-$(CONFIG_ARM_TEGRA194_CPUFREQ) += tegra194-cpufreq.o
obj-$(CONFIG_ARM_TI_CPUFREQ) += ti-cpufreq.o
obj-$(CONFIG_ARM_VEXPRESS_SPC_CPUFREQ) += vexpress-spc-cpufreq.o
diff --git a/drivers/cpufreq/armada-37xx-cpufreq.c b/drivers/cpufreq/armada-37xx-cpufreq.c
index aa0f06dec959..df1c941260d1 100644
--- a/drivers/cpufreq/armada-37xx-cpufreq.c
+++ b/drivers/cpufreq/armada-37xx-cpufreq.c
@@ -456,6 +456,7 @@ static int __init armada37xx_cpufreq_driver_init(void)
/* Now that everything is setup, enable the DVFS at hardware level */
armada37xx_cpufreq_enable_dvfs(nb_pm_base);
+ memset(&pdata, 0, sizeof(pdata));
pdata.suspend = armada37xx_cpufreq_suspend;
pdata.resume = armada37xx_cpufreq_resume;
diff --git a/drivers/cpufreq/brcmstb-avs-cpufreq.c b/drivers/cpufreq/brcmstb-avs-cpufreq.c
index 4f86ce2db34f..3e31e5d28b79 100644
--- a/drivers/cpufreq/brcmstb-avs-cpufreq.c
+++ b/drivers/cpufreq/brcmstb-avs-cpufreq.c
@@ -42,6 +42,7 @@
*/
#include <linux/cpufreq.h>
+#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/module.h>
@@ -178,6 +179,7 @@ struct private_data {
struct completion done;
struct semaphore sem;
struct pmap pmap;
+ int host_irq;
};
static void __iomem *__map_region(const char *name)
@@ -195,11 +197,36 @@ static void __iomem *__map_region(const char *name)
return ptr;
}
-static int __issue_avs_command(struct private_data *priv, int cmd, bool is_send,
+static unsigned long wait_for_avs_command(struct private_data *priv,
+ unsigned long timeout)
+{
+ unsigned long time_left = 0;
+ u32 val;
+
+ /* Event driven, wait for the command interrupt */
+ if (priv->host_irq >= 0)
+ return wait_for_completion_timeout(&priv->done,
+ msecs_to_jiffies(timeout));
+
+ /* Polling for command completion */
+ do {
+ time_left = timeout;
+ val = readl(priv->base + AVS_MBOX_STATUS);
+ if (val)
+ break;
+
+ usleep_range(1000, 2000);
+ } while (--timeout);
+
+ return time_left;
+}
+
+static int __issue_avs_command(struct private_data *priv, unsigned int cmd,
+ unsigned int num_in, unsigned int num_out,
u32 args[])
{
- unsigned long time_left = msecs_to_jiffies(AVS_TIMEOUT);
void __iomem *base = priv->base;
+ unsigned long time_left;
unsigned int i;
int ret;
u32 val;
@@ -225,11 +252,9 @@ static int __issue_avs_command(struct private_data *priv, int cmd, bool is_send,
/* Clear status before we begin. */
writel(AVS_STATUS_CLEAR, base + AVS_MBOX_STATUS);
- /* We need to send arguments for this command. */
- if (args && is_send) {
- for (i = 0; i < AVS_MAX_CMD_ARGS; i++)
- writel(args[i], base + AVS_MBOX_PARAM(i));
- }
+ /* Provide input parameters */
+ for (i = 0; i < num_in; i++)
+ writel(args[i], base + AVS_MBOX_PARAM(i));
/* Protect from spurious interrupts. */
reinit_completion(&priv->done);
@@ -239,7 +264,7 @@ static int __issue_avs_command(struct private_data *priv, int cmd, bool is_send,
writel(AVS_CPU_L2_INT_MASK, priv->avs_intr_base + AVS_CPU_L2_SET0);
/* Wait for AVS co-processor to finish processing the command. */
- time_left = wait_for_completion_timeout(&priv->done, time_left);
+ time_left = wait_for_avs_command(priv, AVS_TIMEOUT);
/*
* If the AVS status is not in the expected range, it means AVS didn't
@@ -256,11 +281,9 @@ static int __issue_avs_command(struct private_data *priv, int cmd, bool is_send,
goto out;
}
- /* This command returned arguments, so we read them back. */
- if (args && !is_send) {
- for (i = 0; i < AVS_MAX_CMD_ARGS; i++)
- args[i] = readl(base + AVS_MBOX_PARAM(i));
- }
+ /* Process returned values */
+ for (i = 0; i < num_out; i++)
+ args[i] = readl(base + AVS_MBOX_PARAM(i));
/* Clear status to tell AVS co-processor we are done. */
writel(AVS_STATUS_CLEAR, base + AVS_MBOX_STATUS);
@@ -338,7 +361,7 @@ static int brcm_avs_get_pmap(struct private_data *priv, struct pmap *pmap)
u32 args[AVS_MAX_CMD_ARGS];
int ret;
- ret = __issue_avs_command(priv, AVS_CMD_GET_PMAP, false, args);
+ ret = __issue_avs_command(priv, AVS_CMD_GET_PMAP, 0, 4, args);
if (ret || !pmap)
return ret;
@@ -359,7 +382,7 @@ static int brcm_avs_set_pmap(struct private_data *priv, struct pmap *pmap)
args[2] = pmap->p2;
args[3] = pmap->state;
- return __issue_avs_command(priv, AVS_CMD_SET_PMAP, true, args);
+ return __issue_avs_command(priv, AVS_CMD_SET_PMAP, 4, 0, args);
}
static int brcm_avs_get_pstate(struct private_data *priv, unsigned int *pstate)
@@ -367,7 +390,7 @@ static int brcm_avs_get_pstate(struct private_data *priv, unsigned int *pstate)
u32 args[AVS_MAX_CMD_ARGS];
int ret;
- ret = __issue_avs_command(priv, AVS_CMD_GET_PSTATE, false, args);
+ ret = __issue_avs_command(priv, AVS_CMD_GET_PSTATE, 0, 1, args);
if (ret)
return ret;
*pstate = args[0];
@@ -381,7 +404,8 @@ static int brcm_avs_set_pstate(struct private_data *priv, unsigned int pstate)
args[0] = pstate;
- return __issue_avs_command(priv, AVS_CMD_SET_PSTATE, true, args);
+ return __issue_avs_command(priv, AVS_CMD_SET_PSTATE, 1, 0, args);
+
}
static u32 brcm_avs_get_voltage(void __iomem *base)
@@ -482,7 +506,14 @@ static int brcm_avs_suspend(struct cpufreq_policy *policy)
* AVS co-processor, not necessarily the P-state we are running at now.
* So, we get the current P-state explicitly.
*/
- return brcm_avs_get_pstate(priv, &priv->pmap.state);
+ ret = brcm_avs_get_pstate(priv, &priv->pmap.state);
+ if (ret)
+ return ret;
+
+ /* This is best effort. Nothing to do if it fails. */
+ (void)__issue_avs_command(priv, AVS_CMD_S2_ENTER, 0, 0, NULL);
+
+ return 0;
}
static int brcm_avs_resume(struct cpufreq_policy *policy)
@@ -490,6 +521,9 @@ static int brcm_avs_resume(struct cpufreq_policy *policy)
struct private_data *priv = policy->driver_data;
int ret;
+ /* This is best effort. Nothing to do if it fails. */
+ (void)__issue_avs_command(priv, AVS_CMD_S2_EXIT, 0, 0, NULL);
+
ret = brcm_avs_set_pmap(priv, &priv->pmap);
if (ret == -EEXIST) {
struct platform_device *pdev = cpufreq_get_driver_data();
@@ -511,7 +545,7 @@ static int brcm_avs_prepare_init(struct platform_device *pdev)
{
struct private_data *priv;
struct device *dev;
- int host_irq, ret;
+ int ret;
dev = &pdev->dev;
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
@@ -538,19 +572,14 @@ static int brcm_avs_prepare_init(struct platform_device *pdev)
goto unmap_base;
}
- host_irq = platform_get_irq_byname(pdev, BRCM_AVS_HOST_INTR);
- if (host_irq < 0) {
- dev_err(dev, "Couldn't find interrupt %s -- %d\n",
- BRCM_AVS_HOST_INTR, host_irq);
- ret = host_irq;
- goto unmap_intr_base;
- }
+ priv->host_irq = platform_get_irq_byname(pdev, BRCM_AVS_HOST_INTR);
- ret = devm_request_irq(dev, host_irq, irq_handler, IRQF_TRIGGER_RISING,
+ ret = devm_request_irq(dev, priv->host_irq, irq_handler,
+ IRQF_TRIGGER_RISING,
BRCM_AVS_HOST_INTR, priv);
- if (ret) {
+ if (ret && priv->host_irq >= 0) {
dev_err(dev, "IRQ request failed: %s (%d) -- %d\n",
- BRCM_AVS_HOST_INTR, host_irq, ret);
+ BRCM_AVS_HOST_INTR, priv->host_irq, ret);
goto unmap_intr_base;
}
@@ -593,7 +622,7 @@ static int brcm_avs_cpufreq_init(struct cpufreq_policy *policy)
/* All cores share the same clock and thus the same policy. */
cpumask_setall(policy->cpus);
- ret = __issue_avs_command(priv, AVS_CMD_ENABLE, false, NULL);
+ ret = __issue_avs_command(priv, AVS_CMD_ENABLE, 0, 0, NULL);
if (!ret) {
unsigned int pstate;
diff --git a/drivers/cpufreq/cppc_cpufreq.c b/drivers/cpufreq/cppc_cpufreq.c
index 257d726a4456..f29e8d0553a8 100644
--- a/drivers/cpufreq/cppc_cpufreq.c
+++ b/drivers/cpufreq/cppc_cpufreq.c
@@ -45,8 +45,6 @@ struct cppc_workaround_oem_info {
u32 oem_revision;
};
-static bool apply_hisi_workaround;
-
static struct cppc_workaround_oem_info wa_info[] = {
{
.oem_id = "HISI ",
@@ -59,50 +57,6 @@ static struct cppc_workaround_oem_info wa_info[] = {
}
};
-static unsigned int cppc_cpufreq_perf_to_khz(struct cppc_cpudata *cpu,
- unsigned int perf);
-
-/*
- * HISI platform does not support delivered performance counter and
- * reference performance counter. It can calculate the performance using the
- * platform specific mechanism. We reuse the desired performance register to
- * store the real performance calculated by the platform.
- */
-static unsigned int hisi_cppc_cpufreq_get_rate(unsigned int cpunum)
-{
- struct cppc_cpudata *cpudata = all_cpu_data[cpunum];
- u64 desired_perf;
- int ret;
-
- ret = cppc_get_desired_perf(cpunum, &desired_perf);
- if (ret < 0)
- return -EIO;
-
- return cppc_cpufreq_perf_to_khz(cpudata, desired_perf);
-}
-
-static void cppc_check_hisi_workaround(void)
-{
- struct acpi_table_header *tbl;
- acpi_status status = AE_OK;
- int i;
-
- status = acpi_get_table(ACPI_SIG_PCCT, 0, &tbl);
- if (ACPI_FAILURE(status) || !tbl)
- return;
-
- for (i = 0; i < ARRAY_SIZE(wa_info); i++) {
- if (!memcmp(wa_info[i].oem_id, tbl->oem_id, ACPI_OEM_ID_SIZE) &&
- !memcmp(wa_info[i].oem_table_id, tbl->oem_table_id, ACPI_OEM_TABLE_ID_SIZE) &&
- wa_info[i].oem_revision == tbl->oem_revision) {
- apply_hisi_workaround = true;
- break;
- }
- }
-
- acpi_put_table(tbl);
-}
-
/* Callback function used to retrieve the max frequency from DMI */
static void cppc_find_dmi_mhz(const struct dmi_header *dm, void *private)
{
@@ -161,7 +115,7 @@ static unsigned int cppc_cpufreq_perf_to_khz(struct cppc_cpudata *cpu,
if (!max_khz)
max_khz = cppc_get_dmi_max_khz();
mul = max_khz;
- div = cpu->perf_caps.highest_perf;
+ div = caps->highest_perf;
}
return (u64)perf * mul / div;
}
@@ -184,7 +138,7 @@ static unsigned int cppc_cpufreq_khz_to_perf(struct cppc_cpudata *cpu,
} else {
if (!max_khz)
max_khz = cppc_get_dmi_max_khz();
- mul = cpu->perf_caps.highest_perf;
+ mul = caps->highest_perf;
div = max_khz;
}
@@ -402,9 +356,6 @@ static unsigned int cppc_cpufreq_get_rate(unsigned int cpunum)
struct cppc_cpudata *cpu = all_cpu_data[cpunum];
int ret;
- if (apply_hisi_workaround)
- return hisi_cppc_cpufreq_get_rate(cpunum);
-
ret = cppc_get_perf_ctrs(cpunum, &fb_ctrs_t0);
if (ret)
return ret;
@@ -455,6 +406,48 @@ static struct cpufreq_driver cppc_cpufreq_driver = {
.name = "cppc_cpufreq",
};
+/*
+ * HISI platform does not support delivered performance counter and
+ * reference performance counter. It can calculate the performance using the
+ * platform specific mechanism. We reuse the desired performance register to
+ * store the real performance calculated by the platform.
+ */
+static unsigned int hisi_cppc_cpufreq_get_rate(unsigned int cpunum)
+{
+ struct cppc_cpudata *cpudata = all_cpu_data[cpunum];
+ u64 desired_perf;
+ int ret;
+
+ ret = cppc_get_desired_perf(cpunum, &desired_perf);
+ if (ret < 0)
+ return -EIO;
+
+ return cppc_cpufreq_perf_to_khz(cpudata, desired_perf);
+}
+
+static void cppc_check_hisi_workaround(void)
+{
+ struct acpi_table_header *tbl;
+ acpi_status status = AE_OK;
+ int i;
+
+ status = acpi_get_table(ACPI_SIG_PCCT, 0, &tbl);
+ if (ACPI_FAILURE(status) || !tbl)
+ return;
+
+ for (i = 0; i < ARRAY_SIZE(wa_info); i++) {
+ if (!memcmp(wa_info[i].oem_id, tbl->oem_id, ACPI_OEM_ID_SIZE) &&
+ !memcmp(wa_info[i].oem_table_id, tbl->oem_table_id, ACPI_OEM_TABLE_ID_SIZE) &&
+ wa_info[i].oem_revision == tbl->oem_revision) {
+ /* Overwrite the get() callback */
+ cppc_cpufreq_driver.get = hisi_cppc_cpufreq_get_rate;
+ break;
+ }
+ }
+
+ acpi_put_table(tbl);
+}
+
static int __init cppc_cpufreq_init(void)
{
int i, ret = 0;
diff --git a/drivers/cpufreq/cpufreq-dt-platdev.c b/drivers/cpufreq/cpufreq-dt-platdev.c
index e8e20fef400b..7d01df7bfa6c 100644
--- a/drivers/cpufreq/cpufreq-dt-platdev.c
+++ b/drivers/cpufreq/cpufreq-dt-platdev.c
@@ -132,6 +132,8 @@ static const struct of_device_id blacklist[] __initconst = {
{ .compatible = "qcom,apq8096", },
{ .compatible = "qcom,msm8996", },
{ .compatible = "qcom,qcs404", },
+ { .compatible = "qcom,sc7180", },
+ { .compatible = "qcom,sdm845", },
{ .compatible = "st,stih407", },
{ .compatible = "st,stih410", },
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index 17c1c3becd92..afad06b91c77 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -541,7 +541,7 @@ unsigned int cpufreq_driver_resolve_freq(struct cpufreq_policy *policy,
policy->cached_target_freq = target_freq;
if (cpufreq_driver->target_index) {
- int idx;
+ unsigned int idx;
idx = cpufreq_frequency_table_target(policy, target_freq,
CPUFREQ_RELATION_L);
diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c
index 7f5d81931483..fc459c9c00ff 100644
--- a/drivers/cpufreq/intel_pstate.c
+++ b/drivers/cpufreq/intel_pstate.c
@@ -1647,6 +1647,7 @@ static void intel_pstate_get_cpu_pstates(struct cpudata *cpu)
intel_pstate_get_hwp_max(cpu->cpu, &phy_max, &current_max);
cpu->pstate.turbo_freq = phy_max * cpu->pstate.scaling;
+ cpu->pstate.turbo_pstate = phy_max;
} else {
cpu->pstate.turbo_freq = cpu->pstate.turbo_pstate * cpu->pstate.scaling;
}
diff --git a/drivers/cpufreq/qcom-cpufreq-hw.c b/drivers/cpufreq/qcom-cpufreq-hw.c
index 0a04b6f03b9a..3fb044b907a8 100644
--- a/drivers/cpufreq/qcom-cpufreq-hw.c
+++ b/drivers/cpufreq/qcom-cpufreq-hw.c
@@ -6,6 +6,7 @@
#include <linux/bitfield.h>
#include <linux/cpufreq.h>
#include <linux/init.h>
+#include <linux/interconnect.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of_address.h>
@@ -30,6 +31,48 @@
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,
+ unsigned long freq_khz)
+{
+ unsigned long freq_hz = freq_khz * 1000;
+ struct dev_pm_opp *opp;
+ struct device *dev;
+ int ret;
+
+ dev = get_cpu_device(policy->cpu);
+ if (!dev)
+ return -ENODEV;
+
+ opp = dev_pm_opp_find_freq_exact(dev, freq_hz, true);
+ if (IS_ERR(opp))
+ return PTR_ERR(opp);
+
+ ret = dev_pm_opp_set_bw(dev, opp);
+ dev_pm_opp_put(opp);
+ return ret;
+}
+
+static int qcom_cpufreq_update_opp(struct device *cpu_dev,
+ unsigned long freq_khz,
+ unsigned long volt)
+{
+ unsigned long freq_hz = freq_khz * 1000;
+ int ret;
+
+ /* Skip voltage update if the opp table is not available */
+ if (!icc_scaling_enabled)
+ return dev_pm_opp_add(cpu_dev, freq_hz, volt);
+
+ ret = dev_pm_opp_adjust_voltage(cpu_dev, freq_hz, volt, volt, volt);
+ if (ret) {
+ dev_err(cpu_dev, "Voltage update failed freq=%ld\n", freq_khz);
+ return ret;
+ }
+
+ return dev_pm_opp_enable(cpu_dev, freq_hz);
+}
static int qcom_cpufreq_hw_target_index(struct cpufreq_policy *policy,
unsigned int index)
@@ -39,6 +82,9 @@ static int qcom_cpufreq_hw_target_index(struct cpufreq_policy *policy,
writel_relaxed(index, perf_state_reg);
+ if (icc_scaling_enabled)
+ qcom_cpufreq_set_bw(policy, freq);
+
arch_set_freq_scale(policy->related_cpus, freq,
policy->cpuinfo.max_freq);
return 0;
@@ -66,13 +112,10 @@ static unsigned int qcom_cpufreq_hw_fast_switch(struct cpufreq_policy *policy,
unsigned int target_freq)
{
void __iomem *perf_state_reg = policy->driver_data;
- int index;
+ unsigned int index;
unsigned long freq;
index = policy->cached_resolved_idx;
- if (index < 0)
- return 0;
-
writel_relaxed(index, perf_state_reg);
freq = policy->freq_table[index].frequency;
@@ -89,11 +132,34 @@ static int qcom_cpufreq_hw_read_lut(struct device *cpu_dev,
u32 data, src, lval, i, core_count, prev_freq = 0, freq;
u32 volt;
struct cpufreq_frequency_table *table;
+ struct dev_pm_opp *opp;
+ unsigned long rate;
+ int ret;
table = kcalloc(LUT_MAX_ENTRIES + 1, sizeof(*table), GFP_KERNEL);
if (!table)
return -ENOMEM;
+ ret = dev_pm_opp_of_add_table(cpu_dev);
+ if (!ret) {
+ /* Disable all opps and cross-validate against LUT later */
+ icc_scaling_enabled = true;
+ for (rate = 0; ; rate++) {
+ opp = dev_pm_opp_find_freq_ceil(cpu_dev, &rate);
+ if (IS_ERR(opp))
+ break;
+
+ dev_pm_opp_put(opp);
+ dev_pm_opp_disable(cpu_dev, rate);
+ }
+ } else if (ret != -ENODEV) {
+ dev_err(cpu_dev, "Invalid opp table in device tree\n");
+ return ret;
+ } else {
+ policy->fast_switch_possible = true;
+ icc_scaling_enabled = false;
+ }
+
for (i = 0; i < LUT_MAX_ENTRIES; i++) {
data = readl_relaxed(base + REG_FREQ_LUT +
i * LUT_ROW_SIZE);
@@ -112,7 +178,7 @@ static int qcom_cpufreq_hw_read_lut(struct device *cpu_dev,
if (freq != prev_freq && core_count != LUT_TURBO_IND) {
table[i].frequency = freq;
- dev_pm_opp_add(cpu_dev, freq * 1000, volt);
+ qcom_cpufreq_update_opp(cpu_dev, freq, volt);
dev_dbg(cpu_dev, "index=%d freq=%d, core_count %d\n", i,
freq, core_count);
} else if (core_count == LUT_TURBO_IND) {
@@ -133,7 +199,7 @@ static int qcom_cpufreq_hw_read_lut(struct device *cpu_dev,
if (prev->frequency == CPUFREQ_ENTRY_INVALID) {
prev->frequency = prev_freq;
prev->flags = CPUFREQ_BOOST_FREQ;
- dev_pm_opp_add(cpu_dev, prev_freq * 1000, volt);
+ qcom_cpufreq_update_opp(cpu_dev, prev_freq, volt);
}
break;
@@ -240,8 +306,6 @@ static int qcom_cpufreq_hw_cpu_init(struct cpufreq_policy *policy)
dev_pm_opp_of_register_em(cpu_dev, policy->cpus);
- policy->fast_switch_possible = true;
-
return 0;
error:
devm_iounmap(dev, base);
@@ -254,6 +318,7 @@ static int qcom_cpufreq_hw_cpu_exit(struct cpufreq_policy *policy)
void __iomem *base = policy->driver_data - REG_PERF_STATE;
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);
@@ -282,6 +347,7 @@ static struct cpufreq_driver cpufreq_qcom_hw_driver = {
static int qcom_cpufreq_hw_driver_probe(struct platform_device *pdev)
{
+ struct device *cpu_dev;
struct clk *clk;
int ret;
@@ -301,6 +367,15 @@ static int qcom_cpufreq_hw_driver_probe(struct platform_device *pdev)
global_pdev = pdev;
+ /* Check for optional interconnect paths on CPU0 */
+ cpu_dev = get_cpu_device(0);
+ if (!cpu_dev)
+ return -EPROBE_DEFER;
+
+ ret = dev_pm_opp_of_find_icc_paths(cpu_dev, NULL);
+ if (ret)
+ return ret;
+
ret = cpufreq_register_driver(&cpufreq_qcom_hw_driver);
if (ret)
dev_err(&pdev->dev, "CPUFreq HW driver failed to register\n");
diff --git a/drivers/cpufreq/sti-cpufreq.c b/drivers/cpufreq/sti-cpufreq.c
index 8f16bbb164b8..a5ad96d29adc 100644
--- a/drivers/cpufreq/sti-cpufreq.c
+++ b/drivers/cpufreq/sti-cpufreq.c
@@ -40,11 +40,11 @@ enum {
};
/**
- * ST CPUFreq Driver Data
+ * struct sti_cpufreq_ddata - ST CPUFreq Driver Data
*
- * @cpu_node CPU's OF node
- * @syscfg_eng Engineering Syscon register map
- * @regmap Syscon register map
+ * @cpu: CPU's OF node
+ * @syscfg_eng: Engineering Syscon register map
+ * @syscfg: Syscon register map
*/
static struct sti_cpufreq_ddata {
struct device *cpu;
diff --git a/drivers/cpufreq/tegra186-cpufreq.c b/drivers/cpufreq/tegra186-cpufreq.c
index 3d2f143748ef..01e1f58ba422 100644
--- a/drivers/cpufreq/tegra186-cpufreq.c
+++ b/drivers/cpufreq/tegra186-cpufreq.c
@@ -223,15 +223,9 @@ static int tegra186_cpufreq_probe(struct platform_device *pdev)
}
}
- tegra_bpmp_put(bpmp);
-
tegra186_cpufreq_driver.driver_data = data;
err = cpufreq_register_driver(&tegra186_cpufreq_driver);
- if (err)
- return err;
-
- return 0;
put_bpmp:
tegra_bpmp_put(bpmp);
diff --git a/drivers/cpufreq/tegra194-cpufreq.c b/drivers/cpufreq/tegra194-cpufreq.c
new file mode 100644
index 000000000000..bae527e507e0
--- /dev/null
+++ b/drivers/cpufreq/tegra194-cpufreq.c
@@ -0,0 +1,390 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2020, NVIDIA CORPORATION. All rights reserved
+ */
+
+#include <linux/cpu.h>
+#include <linux/cpufreq.h>
+#include <linux/delay.h>
+#include <linux/dma-mapping.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+#include <asm/smp_plat.h>
+
+#include <soc/tegra/bpmp.h>
+#include <soc/tegra/bpmp-abi.h>
+
+#define KHZ 1000
+#define REF_CLK_MHZ 408 /* 408 MHz */
+#define US_DELAY 500
+#define US_DELAY_MIN 2
+#define CPUFREQ_TBL_STEP_HZ (50 * KHZ * KHZ)
+#define MAX_CNT ~0U
+
+/* cpufreq transisition latency */
+#define TEGRA_CPUFREQ_TRANSITION_LATENCY (300 * 1000) /* unit in nanoseconds */
+
+enum cluster {
+ CLUSTER0,
+ CLUSTER1,
+ CLUSTER2,
+ CLUSTER3,
+ MAX_CLUSTERS,
+};
+
+struct tegra194_cpufreq_data {
+ void __iomem *regs;
+ size_t num_clusters;
+ struct cpufreq_frequency_table **tables;
+};
+
+struct tegra_cpu_ctr {
+ u32 cpu;
+ u32 delay;
+ u32 coreclk_cnt, last_coreclk_cnt;
+ u32 refclk_cnt, last_refclk_cnt;
+};
+
+struct read_counters_work {
+ struct work_struct work;
+ struct tegra_cpu_ctr c;
+};
+
+static struct workqueue_struct *read_counters_wq;
+
+static enum cluster get_cpu_cluster(u8 cpu)
+{
+ return MPIDR_AFFINITY_LEVEL(cpu_logical_map(cpu), 1);
+}
+
+/*
+ * Read per-core Read-only system register NVFREQ_FEEDBACK_EL1.
+ * The register provides frequency feedback information to
+ * determine the average actual frequency a core has run at over
+ * a period of time.
+ * [31:0] PLLP counter: Counts at fixed frequency (408 MHz)
+ * [63:32] Core clock counter: counts on every core clock cycle
+ * where the core is architecturally clocking
+ */
+static u64 read_freq_feedback(void)
+{
+ u64 val = 0;
+
+ asm volatile("mrs %0, s3_0_c15_c0_5" : "=r" (val) : );
+
+ return val;
+}
+
+static inline u32 map_ndiv_to_freq(struct mrq_cpu_ndiv_limits_response
+ *nltbl, u16 ndiv)
+{
+ return nltbl->ref_clk_hz / KHZ * ndiv / (nltbl->pdiv * nltbl->mdiv);
+}
+
+static void tegra_read_counters(struct work_struct *work)
+{
+ struct read_counters_work *read_counters_work;
+ struct tegra_cpu_ctr *c;
+ u64 val;
+
+ /*
+ * ref_clk_counter(32 bit counter) runs on constant clk,
+ * pll_p(408MHz).
+ * It will take = 2 ^ 32 / 408 MHz to overflow ref clk counter
+ * = 10526880 usec = 10.527 sec to overflow
+ *
+ * Like wise core_clk_counter(32 bit counter) runs on core clock.
+ * It's synchronized to crab_clk (cpu_crab_clk) which runs at
+ * freq of cluster. Assuming max cluster clock ~2000MHz,
+ * It will take = 2 ^ 32 / 2000 MHz to overflow core clk counter
+ * = ~2.147 sec to overflow
+ */
+ read_counters_work = container_of(work, struct read_counters_work,
+ work);
+ c = &read_counters_work->c;
+
+ val = read_freq_feedback();
+ c->last_refclk_cnt = lower_32_bits(val);
+ c->last_coreclk_cnt = upper_32_bits(val);
+ udelay(c->delay);
+ val = read_freq_feedback();
+ c->refclk_cnt = lower_32_bits(val);
+ c->coreclk_cnt = upper_32_bits(val);
+}
+
+/*
+ * Return instantaneous cpu speed
+ * Instantaneous freq is calculated as -
+ * -Takes sample on every query of getting the freq.
+ * - Read core and ref clock counters;
+ * - Delay for X us
+ * - Read above cycle counters again
+ * - Calculates freq by subtracting current and previous counters
+ * divided by the delay time or eqv. of ref_clk_counter in delta time
+ * - Return Kcycles/second, freq in KHz
+ *
+ * delta time period = x sec
+ * = delta ref_clk_counter / (408 * 10^6) sec
+ * freq in Hz = cycles/sec
+ * = (delta cycles / x sec
+ * = (delta cycles * 408 * 10^6) / delta ref_clk_counter
+ * in KHz = (delta cycles * 408 * 10^3) / delta ref_clk_counter
+ *
+ * @cpu - logical cpu whose freq to be updated
+ * Returns freq in KHz on success, 0 if cpu is offline
+ */
+static unsigned int tegra194_get_speed_common(u32 cpu, u32 delay)
+{
+ struct read_counters_work read_counters_work;
+ struct tegra_cpu_ctr c;
+ u32 delta_refcnt;
+ u32 delta_ccnt;
+ u32 rate_mhz;
+
+ /*
+ * udelay() is required to reconstruct cpu frequency over an
+ * observation window. Using workqueue to call udelay() with
+ * interrupts enabled.
+ */
+ read_counters_work.c.cpu = cpu;
+ read_counters_work.c.delay = delay;
+ INIT_WORK_ONSTACK(&read_counters_work.work, tegra_read_counters);
+ queue_work_on(cpu, read_counters_wq, &read_counters_work.work);
+ flush_work(&read_counters_work.work);
+ c = read_counters_work.c;
+
+ if (c.coreclk_cnt < c.last_coreclk_cnt)
+ delta_ccnt = c.coreclk_cnt + (MAX_CNT - c.last_coreclk_cnt);
+ else
+ delta_ccnt = c.coreclk_cnt - c.last_coreclk_cnt;
+ if (!delta_ccnt)
+ return 0;
+
+ /* ref clock is 32 bits */
+ if (c.refclk_cnt < c.last_refclk_cnt)
+ delta_refcnt = c.refclk_cnt + (MAX_CNT - c.last_refclk_cnt);
+ else
+ delta_refcnt = c.refclk_cnt - c.last_refclk_cnt;
+ if (!delta_refcnt) {
+ pr_debug("cpufreq: %d is idle, delta_refcnt: 0\n", cpu);
+ return 0;
+ }
+ rate_mhz = ((unsigned long)(delta_ccnt * REF_CLK_MHZ)) / delta_refcnt;
+
+ return (rate_mhz * KHZ); /* in KHz */
+}
+
+static unsigned int tegra194_get_speed(u32 cpu)
+{
+ return tegra194_get_speed_common(cpu, US_DELAY);
+}
+
+static int tegra194_cpufreq_init(struct cpufreq_policy *policy)
+{
+ struct tegra194_cpufreq_data *data = cpufreq_get_driver_data();
+ int cl = get_cpu_cluster(policy->cpu);
+ u32 cpu;
+
+ if (cl >= data->num_clusters)
+ return -EINVAL;
+
+ /* boot freq */
+ policy->cur = tegra194_get_speed_common(policy->cpu, US_DELAY_MIN);
+
+ /* set same policy for all cpus in a cluster */
+ for (cpu = (cl * 2); cpu < ((cl + 1) * 2); cpu++)
+ cpumask_set_cpu(cpu, policy->cpus);
+
+ policy->freq_table = data->tables[cl];
+ policy->cpuinfo.transition_latency = TEGRA_CPUFREQ_TRANSITION_LATENCY;
+
+ return 0;
+}
+
+static void set_cpu_ndiv(void *data)
+{
+ struct cpufreq_frequency_table *tbl = data;
+ u64 ndiv_val = (u64)tbl->driver_data;
+
+ asm volatile("msr s3_0_c15_c0_4, %0" : : "r" (ndiv_val));
+}
+
+static int tegra194_cpufreq_set_target(struct cpufreq_policy *policy,
+ unsigned int index)
+{
+ struct cpufreq_frequency_table *tbl = policy->freq_table + index;
+
+ /*
+ * Each core writes frequency in per core register. Then both cores
+ * in a cluster run at same frequency which is the maximum frequency
+ * request out of the values requested by both cores in that cluster.
+ */
+ on_each_cpu_mask(policy->cpus, set_cpu_ndiv, tbl, true);
+
+ return 0;
+}
+
+static struct cpufreq_driver tegra194_cpufreq_driver = {
+ .name = "tegra194",
+ .flags = CPUFREQ_STICKY | CPUFREQ_CONST_LOOPS |
+ CPUFREQ_NEED_INITIAL_FREQ_CHECK,
+ .verify = cpufreq_generic_frequency_table_verify,
+ .target_index = tegra194_cpufreq_set_target,
+ .get = tegra194_get_speed,
+ .init = tegra194_cpufreq_init,
+ .attr = cpufreq_generic_attr,
+};
+
+static void tegra194_cpufreq_free_resources(void)
+{
+ destroy_workqueue(read_counters_wq);
+}
+
+static struct cpufreq_frequency_table *
+init_freq_table(struct platform_device *pdev, struct tegra_bpmp *bpmp,
+ unsigned int cluster_id)
+{
+ struct cpufreq_frequency_table *freq_table;
+ struct mrq_cpu_ndiv_limits_response resp;
+ unsigned int num_freqs, ndiv, delta_ndiv;
+ struct mrq_cpu_ndiv_limits_request req;
+ struct tegra_bpmp_message msg;
+ u16 freq_table_step_size;
+ int err, index;
+
+ memset(&req, 0, sizeof(req));
+ req.cluster_id = cluster_id;
+
+ memset(&msg, 0, sizeof(msg));
+ msg.mrq = MRQ_CPU_NDIV_LIMITS;
+ msg.tx.data = &req;
+ msg.tx.size = sizeof(req);
+ msg.rx.data = &resp;
+ msg.rx.size = sizeof(resp);
+
+ err = tegra_bpmp_transfer(bpmp, &msg);
+ if (err)
+ return ERR_PTR(err);
+
+ /*
+ * Make sure frequency table step is a multiple of mdiv to match
+ * vhint table granularity.
+ */
+ freq_table_step_size = resp.mdiv *
+ DIV_ROUND_UP(CPUFREQ_TBL_STEP_HZ, resp.ref_clk_hz);
+
+ dev_dbg(&pdev->dev, "cluster %d: frequency table step size: %d\n",
+ cluster_id, freq_table_step_size);
+
+ delta_ndiv = resp.ndiv_max - resp.ndiv_min;
+
+ if (unlikely(delta_ndiv == 0)) {
+ num_freqs = 1;
+ } else {
+ /* We store both ndiv_min and ndiv_max hence the +1 */
+ num_freqs = delta_ndiv / freq_table_step_size + 1;
+ }
+
+ num_freqs += (delta_ndiv % freq_table_step_size) ? 1 : 0;
+
+ freq_table = devm_kcalloc(&pdev->dev, num_freqs + 1,
+ sizeof(*freq_table), GFP_KERNEL);
+ if (!freq_table)
+ return ERR_PTR(-ENOMEM);
+
+ for (index = 0, ndiv = resp.ndiv_min;
+ ndiv < resp.ndiv_max;
+ index++, ndiv += freq_table_step_size) {
+ freq_table[index].driver_data = ndiv;
+ freq_table[index].frequency = map_ndiv_to_freq(&resp, ndiv);
+ }
+
+ freq_table[index].driver_data = resp.ndiv_max;
+ freq_table[index++].frequency = map_ndiv_to_freq(&resp, resp.ndiv_max);
+ freq_table[index].frequency = CPUFREQ_TABLE_END;
+
+ return freq_table;
+}
+
+static int tegra194_cpufreq_probe(struct platform_device *pdev)
+{
+ struct tegra194_cpufreq_data *data;
+ struct tegra_bpmp *bpmp;
+ int err, i;
+
+ data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ data->num_clusters = MAX_CLUSTERS;
+ data->tables = devm_kcalloc(&pdev->dev, data->num_clusters,
+ sizeof(*data->tables), GFP_KERNEL);
+ if (!data->tables)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, data);
+
+ bpmp = tegra_bpmp_get(&pdev->dev);
+ if (IS_ERR(bpmp))
+ return PTR_ERR(bpmp);
+
+ read_counters_wq = alloc_workqueue("read_counters_wq", __WQ_LEGACY, 1);
+ if (!read_counters_wq) {
+ dev_err(&pdev->dev, "fail to create_workqueue\n");
+ err = -EINVAL;
+ goto put_bpmp;
+ }
+
+ for (i = 0; i < data->num_clusters; i++) {
+ data->tables[i] = init_freq_table(pdev, bpmp, i);
+ if (IS_ERR(data->tables[i])) {
+ err = PTR_ERR(data->tables[i]);
+ goto err_free_res;
+ }
+ }
+
+ tegra194_cpufreq_driver.driver_data = data;
+
+ err = cpufreq_register_driver(&tegra194_cpufreq_driver);
+ if (!err)
+ goto put_bpmp;
+
+err_free_res:
+ tegra194_cpufreq_free_resources();
+put_bpmp:
+ tegra_bpmp_put(bpmp);
+ return err;
+}
+
+static int tegra194_cpufreq_remove(struct platform_device *pdev)
+{
+ cpufreq_unregister_driver(&tegra194_cpufreq_driver);
+ tegra194_cpufreq_free_resources();
+
+ return 0;
+}
+
+static const struct of_device_id tegra194_cpufreq_of_match[] = {
+ { .compatible = "nvidia,tegra194-ccplex", },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, tegra194_cpufreq_of_match);
+
+static struct platform_driver tegra194_ccplex_driver = {
+ .driver = {
+ .name = "tegra194-cpufreq",
+ .of_match_table = tegra194_cpufreq_of_match,
+ },
+ .probe = tegra194_cpufreq_probe,
+ .remove = tegra194_cpufreq_remove,
+};
+module_platform_driver(tegra194_ccplex_driver);
+
+MODULE_AUTHOR("Mikko Perttunen <mperttunen@nvidia.com>");
+MODULE_AUTHOR("Sumit Gupta <sumitg@nvidia.com>");
+MODULE_DESCRIPTION("NVIDIA Tegra194 cpufreq driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/opp/core.c b/drivers/opp/core.c
index 0c8c74a3c868..9d7fb45b1786 100644
--- a/drivers/opp/core.c
+++ b/drivers/opp/core.c
@@ -832,6 +832,37 @@ static int _set_required_opps(struct device *dev,
}
/**
+ * dev_pm_opp_set_bw() - sets bandwidth levels corresponding to an opp
+ * @dev: device for which we do this operation
+ * @opp: opp based on which the bandwidth levels are to be configured
+ *
+ * This configures the bandwidth to the levels specified by the OPP. However
+ * if the OPP specified is NULL the bandwidth levels are cleared out.
+ *
+ * Return: 0 on success or a negative error value.
+ */
+int dev_pm_opp_set_bw(struct device *dev, struct dev_pm_opp *opp)
+{
+ struct opp_table *opp_table;
+ int ret;
+
+ opp_table = _find_opp_table(dev);
+ if (IS_ERR(opp_table)) {
+ dev_err(dev, "%s: device opp table doesn't exist\n", __func__);
+ return PTR_ERR(opp_table);
+ }
+
+ if (opp)
+ ret = _set_opp_bw(opp_table, opp, dev, false);
+ else
+ ret = _set_opp_bw(opp_table, NULL, dev, true);
+
+ dev_pm_opp_put_opp_table(opp_table);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(dev_pm_opp_set_bw);
+
+/**
* dev_pm_opp_set_rate() - Configure new OPP based on frequency
* @dev: device for which we do this operation
* @target_freq: frequency to achieve