summaryrefslogtreecommitdiff
path: root/drivers/cpufreq
diff options
context:
space:
mode:
authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2020-12-14 22:29:50 +0300
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2020-12-14 22:29:50 +0300
commit30c768829af2574a2f60ca85c4cc3ba2ed8d0e58 (patch)
tree2ee0a1abda5cf2c1053e1e4c1a6d15a19bf0f6f2 /drivers/cpufreq
parentb96f038432362a20b96d4c52cefeb2936e2cfd2f (diff)
parentc8bb4520543823a9b3da3861304273dc7232e2c7 (diff)
downloadlinux-30c768829af2574a2f60ca85c4cc3ba2ed8d0e58.tar.xz
Merge branch 'cpufreq/arm/linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm
Pull ARM cpufreq updates for 5.11-rc1 from Viresh Kumar: "This contains the following updates: - Fix imx's NVMEM_IMX_OCOTP dependency (Arnd Bergmann). - Add support for mt8167 and blacklist mt8516 (Fabien Parent). - Some ->get() callback related cleanups to the tegra194 driver and some optimizations in tegra186 driver (Jon Hunter and Sumit Gupta). - Power scale improvements to arm_scmi driver (Lukasz Luba). - Add missing MODULE_DEVICE_TABLE and MODULE_ALIAS to several drivers (Pali Rohár). - Fix error path in mediatek driver (Qinglang Miao). - Fix memleak in ST's cpufreq driver (Yangtao Li)." * 'cpufreq/arm/linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm: (22 commits) cpufreq: arm_scmi: Discover the power scale in performance protocol firmware: arm_scmi: Add power_scale_mw_get() interface cpufreq: tegra194: Rename tegra194_get_speed_common function cpufreq: tegra194: Remove unnecessary frequency calculation cpufreq: tegra186: Simplify cluster information lookup cpufreq: tegra186: Fix sparse 'incorrect type in assignment' warning cpufreq: imx: fix NVMEM_IMX_OCOTP dependency cpufreq: vexpress-spc: Add missing MODULE_ALIAS cpufreq: scpi: Add missing MODULE_ALIAS cpufreq: loongson1: Add missing MODULE_ALIAS cpufreq: sun50i: Add missing MODULE_DEVICE_TABLE cpufreq: st: Add missing MODULE_DEVICE_TABLE cpufreq: qcom: Add missing MODULE_DEVICE_TABLE cpufreq: mediatek: Add missing MODULE_DEVICE_TABLE cpufreq: highbank: Add missing MODULE_DEVICE_TABLE cpufreq: ap806: Add missing MODULE_DEVICE_TABLE cpufreq: mediatek: add missing platform_driver_unregister() on error in mtk_cpufreq_driver_init cpufreq: tegra194: get consistent cpuinfo_cur_freq cpufreq: blacklist mt8516 in cpufreq-dt-platdev cpufreq: mediatek: Add support for mt8167 ...
Diffstat (limited to 'drivers/cpufreq')
-rw-r--r--drivers/cpufreq/Kconfig.arm2
-rw-r--r--drivers/cpufreq/armada-8k-cpufreq.c6
-rw-r--r--drivers/cpufreq/cpufreq-dt-platdev.c2
-rw-r--r--drivers/cpufreq/highbank-cpufreq.c7
-rw-r--r--drivers/cpufreq/loongson1-cpufreq.c1
-rw-r--r--drivers/cpufreq/mediatek-cpufreq.c3
-rw-r--r--drivers/cpufreq/qcom-cpufreq-nvmem.c1
-rw-r--r--drivers/cpufreq/scmi-cpufreq.c5
-rw-r--r--drivers/cpufreq/scpi-cpufreq.c1
-rw-r--r--drivers/cpufreq/sti-cpufreq.c14
-rw-r--r--drivers/cpufreq/sun50i-cpufreq-nvmem.c1
-rw-r--r--drivers/cpufreq/tegra186-cpufreq.c122
-rw-r--r--drivers/cpufreq/tegra194-cpufreq.c72
-rw-r--r--drivers/cpufreq/vexpress-spc-cpufreq.c1
14 files changed, 150 insertions, 88 deletions
diff --git a/drivers/cpufreq/Kconfig.arm b/drivers/cpufreq/Kconfig.arm
index 015ec0c02835..1f73fa75b1a0 100644
--- a/drivers/cpufreq/Kconfig.arm
+++ b/drivers/cpufreq/Kconfig.arm
@@ -94,7 +94,7 @@ config ARM_IMX6Q_CPUFREQ
tristate "Freescale i.MX6 cpufreq support"
depends on ARCH_MXC
depends on REGULATOR_ANATOP
- select NVMEM_IMX_OCOTP
+ depends on NVMEM_IMX_OCOTP || COMPILE_TEST
select PM_OPP
help
This adds cpufreq driver support for Freescale i.MX6 series SoCs.
diff --git a/drivers/cpufreq/armada-8k-cpufreq.c b/drivers/cpufreq/armada-8k-cpufreq.c
index 39e34f5066d3..b0fc5e84f857 100644
--- a/drivers/cpufreq/armada-8k-cpufreq.c
+++ b/drivers/cpufreq/armada-8k-cpufreq.c
@@ -204,6 +204,12 @@ static void __exit armada_8k_cpufreq_exit(void)
}
module_exit(armada_8k_cpufreq_exit);
+static const struct of_device_id __maybe_unused armada_8k_cpufreq_of_match[] = {
+ { .compatible = "marvell,ap806-cpu-clock" },
+ { },
+};
+MODULE_DEVICE_TABLE(of, armada_8k_cpufreq_of_match);
+
MODULE_AUTHOR("Gregory Clement <gregory.clement@bootlin.com>");
MODULE_DESCRIPTION("Armada 8K cpufreq driver");
MODULE_LICENSE("GPL");
diff --git a/drivers/cpufreq/cpufreq-dt-platdev.c b/drivers/cpufreq/cpufreq-dt-platdev.c
index 3776d960f405..bd2db0188cbb 100644
--- a/drivers/cpufreq/cpufreq-dt-platdev.c
+++ b/drivers/cpufreq/cpufreq-dt-platdev.c
@@ -119,10 +119,12 @@ static const struct of_device_id blacklist[] __initconst = {
{ .compatible = "mediatek,mt2712", },
{ .compatible = "mediatek,mt7622", },
{ .compatible = "mediatek,mt7623", },
+ { .compatible = "mediatek,mt8167", },
{ .compatible = "mediatek,mt817x", },
{ .compatible = "mediatek,mt8173", },
{ .compatible = "mediatek,mt8176", },
{ .compatible = "mediatek,mt8183", },
+ { .compatible = "mediatek,mt8516", },
{ .compatible = "nvidia,tegra20", },
{ .compatible = "nvidia,tegra30", },
diff --git a/drivers/cpufreq/highbank-cpufreq.c b/drivers/cpufreq/highbank-cpufreq.c
index 5a7f6dafcddb..ac57cddc5f2f 100644
--- a/drivers/cpufreq/highbank-cpufreq.c
+++ b/drivers/cpufreq/highbank-cpufreq.c
@@ -101,6 +101,13 @@ out_put_node:
}
module_init(hb_cpufreq_driver_init);
+static const struct of_device_id __maybe_unused hb_cpufreq_of_match[] = {
+ { .compatible = "calxeda,highbank" },
+ { .compatible = "calxeda,ecx-2000" },
+ { },
+};
+MODULE_DEVICE_TABLE(of, hb_cpufreq_of_match);
+
MODULE_AUTHOR("Mark Langsdorf <mark.langsdorf@calxeda.com>");
MODULE_DESCRIPTION("Calxeda Highbank cpufreq driver");
MODULE_LICENSE("GPL");
diff --git a/drivers/cpufreq/loongson1-cpufreq.c b/drivers/cpufreq/loongson1-cpufreq.c
index 0ea88778882a..86f612593e49 100644
--- a/drivers/cpufreq/loongson1-cpufreq.c
+++ b/drivers/cpufreq/loongson1-cpufreq.c
@@ -216,6 +216,7 @@ static struct platform_driver ls1x_cpufreq_platdrv = {
module_platform_driver(ls1x_cpufreq_platdrv);
+MODULE_ALIAS("platform:ls1x-cpufreq");
MODULE_AUTHOR("Kelvin Cheung <keguang.zhang@gmail.com>");
MODULE_DESCRIPTION("Loongson1 CPUFreq driver");
MODULE_LICENSE("GPL");
diff --git a/drivers/cpufreq/mediatek-cpufreq.c b/drivers/cpufreq/mediatek-cpufreq.c
index 7d1212c9b7c8..022e3e966e71 100644
--- a/drivers/cpufreq/mediatek-cpufreq.c
+++ b/drivers/cpufreq/mediatek-cpufreq.c
@@ -532,6 +532,7 @@ static const struct of_device_id mtk_cpufreq_machines[] __initconst = {
{ .compatible = "mediatek,mt2712", },
{ .compatible = "mediatek,mt7622", },
{ .compatible = "mediatek,mt7623", },
+ { .compatible = "mediatek,mt8167", },
{ .compatible = "mediatek,mt817x", },
{ .compatible = "mediatek,mt8173", },
{ .compatible = "mediatek,mt8176", },
@@ -540,6 +541,7 @@ static const struct of_device_id mtk_cpufreq_machines[] __initconst = {
{ }
};
+MODULE_DEVICE_TABLE(of, mtk_cpufreq_machines);
static int __init mtk_cpufreq_driver_init(void)
{
@@ -572,6 +574,7 @@ static int __init mtk_cpufreq_driver_init(void)
pdev = platform_device_register_simple("mtk-cpufreq", -1, NULL, 0);
if (IS_ERR(pdev)) {
pr_err("failed to register mtk-cpufreq platform device\n");
+ platform_driver_unregister(&mtk_cpufreq_platdrv);
return PTR_ERR(pdev);
}
diff --git a/drivers/cpufreq/qcom-cpufreq-nvmem.c b/drivers/cpufreq/qcom-cpufreq-nvmem.c
index d06b37822c3d..fba9937a406b 100644
--- a/drivers/cpufreq/qcom-cpufreq-nvmem.c
+++ b/drivers/cpufreq/qcom-cpufreq-nvmem.c
@@ -464,6 +464,7 @@ static const struct of_device_id qcom_cpufreq_match_list[] __initconst = {
{ .compatible = "qcom,msm8960", .data = &match_data_krait },
{},
};
+MODULE_DEVICE_TABLE(of, qcom_cpufreq_match_list);
/*
* Since the driver depends on smem and nvmem drivers, which may
diff --git a/drivers/cpufreq/scmi-cpufreq.c b/drivers/cpufreq/scmi-cpufreq.c
index 8286205c7165..491a0a24fb1e 100644
--- a/drivers/cpufreq/scmi-cpufreq.c
+++ b/drivers/cpufreq/scmi-cpufreq.c
@@ -126,6 +126,7 @@ static int scmi_cpufreq_init(struct cpufreq_policy *policy)
struct scmi_data *priv;
struct cpufreq_frequency_table *freq_table;
struct em_data_callback em_cb = EM_DATA_CB(scmi_get_cpu_power);
+ bool power_scale_mw;
cpu_dev = get_cpu_device(policy->cpu);
if (!cpu_dev) {
@@ -189,7 +190,9 @@ static int scmi_cpufreq_init(struct cpufreq_policy *policy)
policy->fast_switch_possible =
handle->perf_ops->fast_switch_possible(handle, cpu_dev);
- em_dev_register_perf_domain(cpu_dev, nr_opp, &em_cb, policy->cpus);
+ power_scale_mw = handle->perf_ops->power_scale_mw_get(handle);
+ em_dev_register_perf_domain(cpu_dev, nr_opp, &em_cb, policy->cpus,
+ power_scale_mw);
return 0;
diff --git a/drivers/cpufreq/scpi-cpufreq.c b/drivers/cpufreq/scpi-cpufreq.c
index 43db05b949d9..e5140ad63db8 100644
--- a/drivers/cpufreq/scpi-cpufreq.c
+++ b/drivers/cpufreq/scpi-cpufreq.c
@@ -233,6 +233,7 @@ static struct platform_driver scpi_cpufreq_platdrv = {
};
module_platform_driver(scpi_cpufreq_platdrv);
+MODULE_ALIAS("platform:scpi-cpufreq");
MODULE_AUTHOR("Sudeep Holla <sudeep.holla@arm.com>");
MODULE_DESCRIPTION("ARM SCPI CPUFreq interface driver");
MODULE_LICENSE("GPL v2");
diff --git a/drivers/cpufreq/sti-cpufreq.c b/drivers/cpufreq/sti-cpufreq.c
index 4ac6fb23792a..fdb0a722d881 100644
--- a/drivers/cpufreq/sti-cpufreq.c
+++ b/drivers/cpufreq/sti-cpufreq.c
@@ -223,7 +223,8 @@ use_defaults:
opp_table = dev_pm_opp_set_supported_hw(dev, version, VERSION_ELEMENTS);
if (IS_ERR(opp_table)) {
dev_err(dev, "Failed to set supported hardware\n");
- return PTR_ERR(opp_table);
+ ret = PTR_ERR(opp_table);
+ goto err_put_prop_name;
}
dev_dbg(dev, "pcode: %d major: %d minor: %d substrate: %d\n",
@@ -232,6 +233,10 @@ use_defaults:
version[0], version[1], version[2]);
return 0;
+
+err_put_prop_name:
+ dev_pm_opp_put_prop_name(opp_table);
+ return ret;
}
static int sti_cpufreq_fetch_syscon_registers(void)
@@ -292,6 +297,13 @@ register_cpufreq_dt:
}
module_init(sti_cpufreq_init);
+static const struct of_device_id __maybe_unused sti_cpufreq_of_match[] = {
+ { .compatible = "st,stih407" },
+ { .compatible = "st,stih410" },
+ { },
+};
+MODULE_DEVICE_TABLE(of, sti_cpufreq_of_match);
+
MODULE_DESCRIPTION("STMicroelectronics CPUFreq/OPP driver");
MODULE_AUTHOR("Ajitpal Singh <ajitpal.singh@st.com>");
MODULE_AUTHOR("Lee Jones <lee.jones@linaro.org>");
diff --git a/drivers/cpufreq/sun50i-cpufreq-nvmem.c b/drivers/cpufreq/sun50i-cpufreq-nvmem.c
index 9907a165135b..2deed8d8773f 100644
--- a/drivers/cpufreq/sun50i-cpufreq-nvmem.c
+++ b/drivers/cpufreq/sun50i-cpufreq-nvmem.c
@@ -167,6 +167,7 @@ static const struct of_device_id sun50i_cpufreq_match_list[] = {
{ .compatible = "allwinner,sun50i-h6" },
{}
};
+MODULE_DEVICE_TABLE(of, sun50i_cpufreq_match_list);
static const struct of_device_id *sun50i_cpufreq_match_node(void)
{
diff --git a/drivers/cpufreq/tegra186-cpufreq.c b/drivers/cpufreq/tegra186-cpufreq.c
index 7eb2c56c65de..e566ea298b59 100644
--- a/drivers/cpufreq/tegra186-cpufreq.c
+++ b/drivers/cpufreq/tegra186-cpufreq.c
@@ -12,35 +12,52 @@
#include <soc/tegra/bpmp.h>
#include <soc/tegra/bpmp-abi.h>
-#define EDVD_CORE_VOLT_FREQ(core) (0x20 + (core) * 0x4)
-#define EDVD_CORE_VOLT_FREQ_F_SHIFT 0
-#define EDVD_CORE_VOLT_FREQ_F_MASK 0xffff
-#define EDVD_CORE_VOLT_FREQ_V_SHIFT 16
-
-struct tegra186_cpufreq_cluster_info {
- unsigned long offset;
- int cpus[4];
+#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
+#define EDVD_CORE_VOLT_FREQ_F_MASK 0xffff
+#define EDVD_CORE_VOLT_FREQ_V_SHIFT 16
+
+struct tegra186_cpufreq_cpu {
unsigned int bpmp_cluster_id;
+ unsigned int edvd_offset;
};
-#define NO_CPU -1
-static const struct tegra186_cpufreq_cluster_info tegra186_clusters[] = {
- /* Denver cluster */
+static const struct tegra186_cpufreq_cpu tegra186_cpus[] = {
+ /* CPU0 - A57 Cluster */
+ {
+ .bpmp_cluster_id = 1,
+ .edvd_offset = EDVD_OFFSET_A57(0)
+ },
+ /* CPU1 - Denver Cluster */
{
- .offset = SZ_64K * 7,
- .cpus = { 1, 2, NO_CPU, NO_CPU },
.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)
},
- /* A57 cluster */
+ /* CPU4 - A57 Cluster */
{
- .offset = SZ_64K * 6,
- .cpus = { 0, 3, 4, 5 },
.bpmp_cluster_id = 1,
+ .edvd_offset = EDVD_OFFSET_A57(2)
+ },
+ /* CPU5 - A57 Cluster */
+ {
+ .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;
@@ -48,36 +65,18 @@ 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;
};
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->driver_data =
- data->regs + info->offset + EDVD_CORE_VOLT_FREQ(core);
- 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;
return 0;
}
@@ -85,11 +84,12 @@ static int tegra186_cpufreq_init(struct cpufreq_policy *policy)
static int tegra186_cpufreq_set_target(struct cpufreq_policy *policy,
unsigned int index)
{
+ struct tegra186_cpufreq_data *data = cpufreq_get_driver_data();
struct cpufreq_frequency_table *tbl = policy->freq_table + index;
- void __iomem *edvd_reg = policy->driver_data;
+ unsigned int edvd_offset = data->cpus[policy->cpu].edvd_offset;
u32 edvd_val = tbl->driver_data;
- writel(edvd_val, edvd_reg);
+ writel(edvd_val, data->regs + edvd_offset);
return 0;
}
@@ -97,35 +97,22 @@ 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;
- void __iomem *edvd_reg;
- unsigned int i, freq = 0;
+ unsigned int edvd_offset, cluster_id;
u32 ndiv;
policy = cpufreq_cpu_get(cpu);
if (!policy)
return 0;
- edvd_reg = policy->driver_data;
- ndiv = readl(edvd_reg) & 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:
+ edvd_offset = data->cpus[policy->cpu].edvd_offset;
+ ndiv = readl(data->regs + edvd_offset) & EDVD_CORE_VOLT_FREQ_F_MASK;
+ 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 = {
@@ -141,7 +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;
@@ -160,7 +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;
@@ -234,12 +221,12 @@ 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);
if (IS_ERR(bpmp))
@@ -251,11 +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;
diff --git a/drivers/cpufreq/tegra194-cpufreq.c b/drivers/cpufreq/tegra194-cpufreq.c
index e1d931c457a7..6a67f36f3b80 100644
--- a/drivers/cpufreq/tegra194-cpufreq.c
+++ b/drivers/cpufreq/tegra194-cpufreq.c
@@ -21,7 +21,6 @@
#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
@@ -44,7 +43,6 @@ struct tegra194_cpufreq_data {
struct tegra_cpu_ctr {
u32 cpu;
- u32 delay;
u32 coreclk_cnt, last_coreclk_cnt;
u32 refclk_cnt, last_refclk_cnt;
};
@@ -112,7 +110,7 @@ static void tegra_read_counters(struct work_struct *work)
val = read_freq_feedback();
c->last_refclk_cnt = lower_32_bits(val);
c->last_coreclk_cnt = upper_32_bits(val);
- udelay(c->delay);
+ udelay(US_DELAY);
val = read_freq_feedback();
c->refclk_cnt = lower_32_bits(val);
c->coreclk_cnt = upper_32_bits(val);
@@ -139,7 +137,7 @@ static void tegra_read_counters(struct work_struct *work)
* @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)
+static unsigned int tegra194_calculate_speed(u32 cpu)
{
struct read_counters_work read_counters_work;
struct tegra_cpu_ctr c;
@@ -153,7 +151,6 @@ static unsigned int tegra194_get_speed_common(u32 cpu, u32 delay)
* 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);
@@ -180,9 +177,61 @@ static unsigned int tegra194_get_speed_common(u32 cpu, u32 delay)
return (rate_mhz * KHZ); /* in KHz */
}
+static void get_cpu_ndiv(void *ndiv)
+{
+ u64 ndiv_val;
+
+ asm volatile("mrs %0, s3_0_c15_c0_4" : "=r" (ndiv_val) : );
+
+ *(u64 *)ndiv = ndiv_val;
+}
+
+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 unsigned int tegra194_get_speed(u32 cpu)
{
- return tegra194_get_speed_common(cpu, US_DELAY);
+ struct tegra194_cpufreq_data *data = cpufreq_get_driver_data();
+ struct cpufreq_frequency_table *pos;
+ unsigned int rate;
+ u64 ndiv;
+ int ret;
+ u32 cl;
+
+ smp_call_function_single(cpu, get_cpu_cluster, &cl, true);
+
+ /* reconstruct actual cpu freq using counters */
+ rate = tegra194_calculate_speed(cpu);
+
+ /* get last written ndiv value */
+ ret = smp_call_function_single(cpu, get_cpu_ndiv, &ndiv, true);
+ if (WARN_ON_ONCE(ret))
+ return rate;
+
+ /*
+ * If the reconstructed frequency has acceptable delta from
+ * the last written value, then return freq corresponding
+ * to the last written ndiv value from freq_table. This is
+ * done to return consistent value.
+ */
+ cpufreq_for_each_valid_entry(pos, data->tables[cl]) {
+ if (pos->driver_data != ndiv)
+ continue;
+
+ if (abs(pos->frequency - rate) > 115200) {
+ pr_warn("cpufreq: cpu%d,cur:%u,set:%u,set ndiv:%llu\n",
+ cpu, rate, pos->frequency, ndiv);
+ } else {
+ rate = pos->frequency;
+ }
+ break;
+ }
+ return rate;
}
static int tegra194_cpufreq_init(struct cpufreq_policy *policy)
@@ -196,9 +245,6 @@ static int tegra194_cpufreq_init(struct cpufreq_policy *policy)
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);
@@ -209,14 +255,6 @@ static int tegra194_cpufreq_init(struct cpufreq_policy *policy)
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)
{
diff --git a/drivers/cpufreq/vexpress-spc-cpufreq.c b/drivers/cpufreq/vexpress-spc-cpufreq.c
index e89b905754d2..f711d8eaea6a 100644
--- a/drivers/cpufreq/vexpress-spc-cpufreq.c
+++ b/drivers/cpufreq/vexpress-spc-cpufreq.c
@@ -591,6 +591,7 @@ static struct platform_driver ve_spc_cpufreq_platdrv = {
};
module_platform_driver(ve_spc_cpufreq_platdrv);
+MODULE_ALIAS("platform:vexpress-spc-cpufreq");
MODULE_AUTHOR("Viresh Kumar <viresh.kumar@linaro.org>");
MODULE_AUTHOR("Sudeep Holla <sudeep.holla@arm.com>");
MODULE_DESCRIPTION("Vexpress SPC ARM big LITTLE cpufreq driver");