summaryrefslogtreecommitdiff
path: root/drivers/cpufreq
diff options
context:
space:
mode:
authorArnd Bergmann <arnd@arndb.de>2019-02-15 19:26:16 +0300
committerArnd Bergmann <arnd@arndb.de>2019-02-15 19:29:54 +0300
commitf35635a6b769a63cae7e9c1a1f6cff7e1700584a (patch)
treef873caccdb163e6b33de5960de21685a2852e9e1 /drivers/cpufreq
parenta21c3f1795c151755e93f2fdf33caaa92304faea (diff)
parent43c36002b86d6027b48f7c68ac32245f73f29f6b (diff)
downloadlinux-f35635a6b769a63cae7e9c1a1f6cff7e1700584a.tar.xz
Merge tag 'tegra-for-5.1-cpufreq' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux into arm/drivers
cpufreq: tegra: Add support for Tegra210 This uses the DFLL clock support to enable CPU frequency scaling on Tegra210. * tag 'tegra-for-5.1-cpufreq' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux: cpufreq: dt-platdev: add Tegra210 to blacklist cpufreq: tegra124: extend to support Tegra210 cpufreq: tegra124: do not handle the CPU rail Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'drivers/cpufreq')
-rw-r--r--drivers/cpufreq/Kconfig.arm4
-rw-r--r--drivers/cpufreq/cpufreq-dt-platdev.c1
-rw-r--r--drivers/cpufreq/tegra124-cpufreq.c44
3 files changed, 7 insertions, 42 deletions
diff --git a/drivers/cpufreq/Kconfig.arm b/drivers/cpufreq/Kconfig.arm
index 688f10227793..1a6778e81f90 100644
--- a/drivers/cpufreq/Kconfig.arm
+++ b/drivers/cpufreq/Kconfig.arm
@@ -272,8 +272,8 @@ config ARM_TEGRA20_CPUFREQ
This adds the CPUFreq driver support for Tegra20 SOCs.
config ARM_TEGRA124_CPUFREQ
- tristate "Tegra124 CPUFreq support"
- depends on ARCH_TEGRA && CPUFREQ_DT && REGULATOR
+ bool "Tegra124 CPUFreq support"
+ depends on ARCH_TEGRA && CPUFREQ_DT
default y
help
This adds the CPUFreq driver support for Tegra124 SOCs.
diff --git a/drivers/cpufreq/cpufreq-dt-platdev.c b/drivers/cpufreq/cpufreq-dt-platdev.c
index b1c5468dca16..47729a22c159 100644
--- a/drivers/cpufreq/cpufreq-dt-platdev.c
+++ b/drivers/cpufreq/cpufreq-dt-platdev.c
@@ -119,6 +119,7 @@ static const struct of_device_id blacklist[] __initconst = {
{ .compatible = "mediatek,mt8176", },
{ .compatible = "nvidia,tegra124", },
+ { .compatible = "nvidia,tegra210", },
{ .compatible = "qcom,apq8096", },
{ .compatible = "qcom,msm8996", },
diff --git a/drivers/cpufreq/tegra124-cpufreq.c b/drivers/cpufreq/tegra124-cpufreq.c
index 43530254201a..ba3795e13ac6 100644
--- a/drivers/cpufreq/tegra124-cpufreq.c
+++ b/drivers/cpufreq/tegra124-cpufreq.c
@@ -22,11 +22,9 @@
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/pm_opp.h>
-#include <linux/regulator/consumer.h>
#include <linux/types.h>
struct tegra124_cpufreq_priv {
- struct regulator *vdd_cpu_reg;
struct clk *cpu_clk;
struct clk *pllp_clk;
struct clk *pllx_clk;
@@ -60,14 +58,6 @@ out:
return ret;
}
-static void tegra124_cpu_switch_to_pllx(struct tegra124_cpufreq_priv *priv)
-{
- clk_set_parent(priv->cpu_clk, priv->pllp_clk);
- clk_disable_unprepare(priv->dfll_clk);
- regulator_sync_voltage(priv->vdd_cpu_reg);
- clk_set_parent(priv->cpu_clk, priv->pllx_clk);
-}
-
static int tegra124_cpufreq_probe(struct platform_device *pdev)
{
struct tegra124_cpufreq_priv *priv;
@@ -88,16 +78,10 @@ static int tegra124_cpufreq_probe(struct platform_device *pdev)
if (!np)
return -ENODEV;
- priv->vdd_cpu_reg = regulator_get(cpu_dev, "vdd-cpu");
- if (IS_ERR(priv->vdd_cpu_reg)) {
- ret = PTR_ERR(priv->vdd_cpu_reg);
- goto out_put_np;
- }
-
priv->cpu_clk = of_clk_get_by_name(np, "cpu_g");
if (IS_ERR(priv->cpu_clk)) {
ret = PTR_ERR(priv->cpu_clk);
- goto out_put_vdd_cpu_reg;
+ goto out_put_np;
}
priv->dfll_clk = of_clk_get_by_name(np, "dfll");
@@ -129,15 +113,13 @@ static int tegra124_cpufreq_probe(struct platform_device *pdev)
platform_device_register_full(&cpufreq_dt_devinfo);
if (IS_ERR(priv->cpufreq_dt_pdev)) {
ret = PTR_ERR(priv->cpufreq_dt_pdev);
- goto out_switch_to_pllx;
+ goto out_put_pllp_clk;
}
platform_set_drvdata(pdev, priv);
return 0;
-out_switch_to_pllx:
- tegra124_cpu_switch_to_pllx(priv);
out_put_pllp_clk:
clk_put(priv->pllp_clk);
out_put_pllx_clk:
@@ -146,34 +128,15 @@ out_put_dfll_clk:
clk_put(priv->dfll_clk);
out_put_cpu_clk:
clk_put(priv->cpu_clk);
-out_put_vdd_cpu_reg:
- regulator_put(priv->vdd_cpu_reg);
out_put_np:
of_node_put(np);
return ret;
}
-static int tegra124_cpufreq_remove(struct platform_device *pdev)
-{
- struct tegra124_cpufreq_priv *priv = platform_get_drvdata(pdev);
-
- platform_device_unregister(priv->cpufreq_dt_pdev);
- tegra124_cpu_switch_to_pllx(priv);
-
- clk_put(priv->pllp_clk);
- clk_put(priv->pllx_clk);
- clk_put(priv->dfll_clk);
- clk_put(priv->cpu_clk);
- regulator_put(priv->vdd_cpu_reg);
-
- return 0;
-}
-
static struct platform_driver tegra124_cpufreq_platdrv = {
.driver.name = "cpufreq-tegra124",
.probe = tegra124_cpufreq_probe,
- .remove = tegra124_cpufreq_remove,
};
static int __init tegra_cpufreq_init(void)
@@ -181,7 +144,8 @@ static int __init tegra_cpufreq_init(void)
int ret;
struct platform_device *pdev;
- if (!of_machine_is_compatible("nvidia,tegra124"))
+ if (!(of_machine_is_compatible("nvidia,tegra124") ||
+ of_machine_is_compatible("nvidia,tegra210")))
return -ENODEV;
/*