168 lines
4.9 KiB
Diff
168 lines
4.9 KiB
Diff
From 147c507542ee7feb5bd85212669eeaec2c0420b1 Mon Sep 17 00:00:00 2001
|
|
From: Romuald JEANNE <romuald.jeanne@st.com>
|
|
Date: Tue, 16 Mar 2021 08:56:21 +0100
|
|
Subject: [PATCH 03/22] ARM 5.10.10-stm32mp1-r1 CPUFREQ
|
|
|
|
---
|
|
drivers/cpufreq/Kconfig.arm | 7 ++
|
|
drivers/cpufreq/Makefile | 1 +
|
|
drivers/cpufreq/cpufreq-dt-platdev.c | 3 +
|
|
drivers/cpufreq/stm32-cpufreq.c | 101 +++++++++++++++++++++++++++
|
|
4 files changed, 112 insertions(+)
|
|
create mode 100644 drivers/cpufreq/stm32-cpufreq.c
|
|
|
|
diff --git a/drivers/cpufreq/Kconfig.arm b/drivers/cpufreq/Kconfig.arm
|
|
index 1f73fa75b1a0..56b210670b50 100644
|
|
--- a/drivers/cpufreq/Kconfig.arm
|
|
+++ b/drivers/cpufreq/Kconfig.arm
|
|
@@ -289,6 +289,13 @@ config ARM_STI_CPUFREQ
|
|
this config option if you wish to add CPUFreq support for STi based
|
|
SoCs.
|
|
|
|
+config ARM_STM32_CPUFREQ
|
|
+ tristate "STM32 CPUFreq support"
|
|
+ depends on MACH_STM32MP157
|
|
+ default y
|
|
+ help
|
|
+ This adds the CPUFreq driver support for STM32 MPU SOCs.
|
|
+
|
|
config ARM_TANGO_CPUFREQ
|
|
bool
|
|
depends on CPUFREQ_DT && ARCH_TANGO
|
|
diff --git a/drivers/cpufreq/Makefile b/drivers/cpufreq/Makefile
|
|
index f1b7e3dd6e5d..b373f97f26a2 100644
|
|
--- a/drivers/cpufreq/Makefile
|
|
+++ b/drivers/cpufreq/Makefile
|
|
@@ -78,6 +78,7 @@ obj-$(CONFIG_ARM_SCMI_CPUFREQ) += scmi-cpufreq.o
|
|
obj-$(CONFIG_ARM_SCPI_CPUFREQ) += scpi-cpufreq.o
|
|
obj-$(CONFIG_ARM_SPEAR_CPUFREQ) += spear-cpufreq.o
|
|
obj-$(CONFIG_ARM_STI_CPUFREQ) += sti-cpufreq.o
|
|
+obj-$(CONFIG_ARM_STM32_CPUFREQ) += stm32-cpufreq.o
|
|
obj-$(CONFIG_ARM_ALLWINNER_SUN50I_CPUFREQ_NVMEM) += sun50i-cpufreq-nvmem.o
|
|
obj-$(CONFIG_ARM_TANGO_CPUFREQ) += tango-cpufreq.o
|
|
obj-$(CONFIG_ARM_TEGRA20_CPUFREQ) += tegra20-cpufreq.o
|
|
diff --git a/drivers/cpufreq/cpufreq-dt-platdev.c b/drivers/cpufreq/cpufreq-dt-platdev.c
|
|
index 3776d960f405..86fcbb6fa5b8 100644
|
|
--- a/drivers/cpufreq/cpufreq-dt-platdev.c
|
|
+++ b/drivers/cpufreq/cpufreq-dt-platdev.c
|
|
@@ -138,6 +138,9 @@ static const struct of_device_id blacklist[] __initconst = {
|
|
{ .compatible = "st,stih407", },
|
|
{ .compatible = "st,stih410", },
|
|
{ .compatible = "st,stih418", },
|
|
+ { .compatible = "st,stm32mp151", },
|
|
+ { .compatible = "st,stm32mp153", },
|
|
+ { .compatible = "st,stm32mp157", },
|
|
|
|
{ .compatible = "sigma,tango4", },
|
|
|
|
diff --git a/drivers/cpufreq/stm32-cpufreq.c b/drivers/cpufreq/stm32-cpufreq.c
|
|
new file mode 100644
|
|
index 000000000000..35fb3520d48d
|
|
--- /dev/null
|
|
+++ b/drivers/cpufreq/stm32-cpufreq.c
|
|
@@ -0,0 +1,101 @@
|
|
+// SPDX-License-Identifier: GPL-2.0-only
|
|
+/*
|
|
+ * Copyright (C) STMicroelectronics 2019 - All Rights Reserved
|
|
+ * Authors: Alexandre Torgue <alexandre.torgue@st.com> for STMicroelectronics.
|
|
+ */
|
|
+
|
|
+#include <linux/cpu.h>
|
|
+#include <linux/cpufreq.h>
|
|
+#include <linux/init.h>
|
|
+#include <linux/kernel.h>
|
|
+#include <linux/module.h>
|
|
+#include <linux/nvmem-consumer.h>
|
|
+#include <linux/of_platform.h>
|
|
+#include <linux/pm_opp.h>
|
|
+
|
|
+struct stm32_cpufreq_priv {
|
|
+ struct opp_table *opps;
|
|
+ struct platform_device *cpufreq_dt_pdev;
|
|
+};
|
|
+
|
|
+static int stm32_cpufreq_probe(struct platform_device *pdev)
|
|
+{
|
|
+ struct stm32_cpufreq_priv *priv;
|
|
+ struct device_node *opp_node;
|
|
+ struct device *cpu_dev;
|
|
+ u8 part_number;
|
|
+ u32 supported_hw;
|
|
+ int ret;
|
|
+
|
|
+ cpu_dev = get_cpu_device(0);
|
|
+ if (!cpu_dev) {
|
|
+ dev_err(&pdev->dev, "failed to get cpu0 device\n");
|
|
+ return -ENODEV;
|
|
+ }
|
|
+ opp_node = dev_pm_opp_of_get_opp_desc_node(cpu_dev);
|
|
+ if (!opp_node) {
|
|
+ dev_err(&pdev->dev, "OPP-v2 not supported\n");
|
|
+ return -ENODEV;
|
|
+ }
|
|
+
|
|
+ /* Get chip info */
|
|
+ ret = nvmem_cell_read_u8(cpu_dev, "part_number", &part_number);
|
|
+ if (ret) {
|
|
+ dev_err(&pdev->dev, "Failed to get chip info: %d\n", ret);
|
|
+ return ret;
|
|
+ }
|
|
+
|
|
+ supported_hw = BIT((part_number & 0x80) >> 7);
|
|
+
|
|
+ priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
|
|
+ if (!priv)
|
|
+ return -ENOMEM;
|
|
+
|
|
+ priv->opps = dev_pm_opp_set_supported_hw(cpu_dev, &supported_hw, 1);
|
|
+ if (IS_ERR(priv->opps)) {
|
|
+ ret = PTR_ERR(priv->opps);
|
|
+ if (ret != -EPROBE_DEFER)
|
|
+ dev_err(&pdev->dev, "Failed to set supported opp: %d\n",
|
|
+ ret);
|
|
+ return ret;
|
|
+ }
|
|
+
|
|
+ of_node_put(opp_node);
|
|
+ priv->cpufreq_dt_pdev = platform_device_register_simple("cpufreq-dt",
|
|
+ -1, NULL, 0);
|
|
+
|
|
+ platform_set_drvdata(pdev, priv);
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static int stm32_cpufreq_remove(struct platform_device *pdev)
|
|
+{
|
|
+ struct stm32_cpufreq_priv *priv = platform_get_drvdata(pdev);
|
|
+
|
|
+ platform_device_unregister(priv->cpufreq_dt_pdev);
|
|
+ dev_pm_opp_put_supported_hw(priv->opps);
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static int stm32_cpufreq_init(void)
|
|
+{
|
|
+ platform_device_register_simple("stm32-cpufreq", -1, NULL, 0);
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+module_init(stm32_cpufreq_init);
|
|
+
|
|
+static struct platform_driver stm32_cpufreq_platdrv = {
|
|
+ .driver = {
|
|
+ .name = "stm32-cpufreq",
|
|
+ },
|
|
+ .probe = stm32_cpufreq_probe,
|
|
+ .remove = stm32_cpufreq_remove,
|
|
+};
|
|
+module_platform_driver(stm32_cpufreq_platdrv);
|
|
+
|
|
+MODULE_DESCRIPTION("STM32 CPU freq driver");
|
|
+MODULE_AUTHOR("Alexandre Torgue <alexandre.torgue@st.com>");
|
|
+MODULE_LICENSE("GPL v2");
|
|
--
|
|
2.17.1
|
|
|