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-rw-r--r--drivers/soc/samsung/exynos-pmu.c173
1 files changed, 173 insertions, 0 deletions
diff --git a/drivers/soc/samsung/exynos-pmu.c b/drivers/soc/samsung/exynos-pmu.c
new file mode 100644
index 0000000000..250537d7cf
--- /dev/null
+++ b/drivers/soc/samsung/exynos-pmu.c
@@ -0,0 +1,173 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Copyright (c) 2011-2014 Samsung Electronics Co., Ltd.
+// http://www.samsung.com/
+//
+// Exynos - CPU PMU(Power Management Unit) support
+
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/syscon.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/delay.h>
+
+#include <linux/soc/samsung/exynos-regs-pmu.h>
+#include <linux/soc/samsung/exynos-pmu.h>
+
+#include "exynos-pmu.h"
+
+struct exynos_pmu_context {
+ struct device *dev;
+ const struct exynos_pmu_data *pmu_data;
+};
+
+void __iomem *pmu_base_addr;
+static struct exynos_pmu_context *pmu_context;
+
+void pmu_raw_writel(u32 val, u32 offset)
+{
+ writel_relaxed(val, pmu_base_addr + offset);
+}
+
+u32 pmu_raw_readl(u32 offset)
+{
+ return readl_relaxed(pmu_base_addr + offset);
+}
+
+void exynos_sys_powerdown_conf(enum sys_powerdown mode)
+{
+ unsigned int i;
+ const struct exynos_pmu_data *pmu_data;
+
+ if (!pmu_context || !pmu_context->pmu_data)
+ return;
+
+ pmu_data = pmu_context->pmu_data;
+
+ if (pmu_data->powerdown_conf)
+ pmu_data->powerdown_conf(mode);
+
+ if (pmu_data->pmu_config) {
+ for (i = 0; (pmu_data->pmu_config[i].offset != PMU_TABLE_END); i++)
+ pmu_raw_writel(pmu_data->pmu_config[i].val[mode],
+ pmu_data->pmu_config[i].offset);
+ }
+
+ if (pmu_data->powerdown_conf_extra)
+ pmu_data->powerdown_conf_extra(mode);
+
+ if (pmu_data->pmu_config_extra) {
+ for (i = 0; pmu_data->pmu_config_extra[i].offset != PMU_TABLE_END; i++)
+ pmu_raw_writel(pmu_data->pmu_config_extra[i].val[mode],
+ pmu_data->pmu_config_extra[i].offset);
+ }
+}
+
+/*
+ * Split the data between ARM architectures because it is relatively big
+ * and useless on other arch.
+ */
+#ifdef CONFIG_EXYNOS_PMU_ARM_DRIVERS
+#define exynos_pmu_data_arm_ptr(data) (&data)
+#else
+#define exynos_pmu_data_arm_ptr(data) NULL
+#endif
+
+/*
+ * PMU platform driver and devicetree bindings.
+ */
+static const struct of_device_id exynos_pmu_of_device_ids[] = {
+ {
+ .compatible = "samsung,exynos3250-pmu",
+ .data = exynos_pmu_data_arm_ptr(exynos3250_pmu_data),
+ }, {
+ .compatible = "samsung,exynos4210-pmu",
+ .data = exynos_pmu_data_arm_ptr(exynos4210_pmu_data),
+ }, {
+ .compatible = "samsung,exynos4212-pmu",
+ .data = exynos_pmu_data_arm_ptr(exynos4212_pmu_data),
+ }, {
+ .compatible = "samsung,exynos4412-pmu",
+ .data = exynos_pmu_data_arm_ptr(exynos4412_pmu_data),
+ }, {
+ .compatible = "samsung,exynos5250-pmu",
+ .data = exynos_pmu_data_arm_ptr(exynos5250_pmu_data),
+ }, {
+ .compatible = "samsung,exynos5410-pmu",
+ }, {
+ .compatible = "samsung,exynos5420-pmu",
+ .data = exynos_pmu_data_arm_ptr(exynos5420_pmu_data),
+ }, {
+ .compatible = "samsung,exynos5433-pmu",
+ }, {
+ .compatible = "samsung,exynos7-pmu",
+ }, {
+ .compatible = "samsung,exynos850-pmu",
+ },
+ { /*sentinel*/ },
+};
+
+static const struct mfd_cell exynos_pmu_devs[] = {
+ { .name = "exynos-clkout", },
+};
+
+struct regmap *exynos_get_pmu_regmap(void)
+{
+ struct device_node *np = of_find_matching_node(NULL,
+ exynos_pmu_of_device_ids);
+ if (np)
+ return syscon_node_to_regmap(np);
+ return ERR_PTR(-ENODEV);
+}
+EXPORT_SYMBOL_GPL(exynos_get_pmu_regmap);
+
+static int exynos_pmu_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ int ret;
+
+ pmu_base_addr = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(pmu_base_addr))
+ return PTR_ERR(pmu_base_addr);
+
+ pmu_context = devm_kzalloc(&pdev->dev,
+ sizeof(struct exynos_pmu_context),
+ GFP_KERNEL);
+ if (!pmu_context)
+ return -ENOMEM;
+ pmu_context->dev = dev;
+ pmu_context->pmu_data = of_device_get_match_data(dev);
+
+ if (pmu_context->pmu_data && pmu_context->pmu_data->pmu_init)
+ pmu_context->pmu_data->pmu_init();
+
+ platform_set_drvdata(pdev, pmu_context);
+
+ ret = devm_mfd_add_devices(dev, PLATFORM_DEVID_NONE, exynos_pmu_devs,
+ ARRAY_SIZE(exynos_pmu_devs), NULL, 0, NULL);
+ if (ret)
+ return ret;
+
+ if (devm_of_platform_populate(dev))
+ dev_err(dev, "Error populating children, reboot and poweroff might not work properly\n");
+
+ dev_dbg(dev, "Exynos PMU Driver probe done\n");
+ return 0;
+}
+
+static struct platform_driver exynos_pmu_driver = {
+ .driver = {
+ .name = "exynos-pmu",
+ .of_match_table = exynos_pmu_of_device_ids,
+ },
+ .probe = exynos_pmu_probe,
+};
+
+static int __init exynos_pmu_init(void)
+{
+ return platform_driver_register(&exynos_pmu_driver);
+
+}
+postcore_initcall(exynos_pmu_init);