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// 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/of_device.h>
#include <linux/mfd/core.h>
#include <linux/mfd/syscon.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);
}
/*
* 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,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",
},
{ /*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);
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