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