7353c54620
The syscon poweroff and restart nodes logically belong to the Power Management Unit so populate possible children. This also requires providing compatibles for Exynos5410 and Exynos7 so the PMU device and its children will be instantiated for them as well. Just like Exynos5433, these chipsets are not yet supported by the PMU driver. Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Reviewed-by: Rob Herring <robh@kernel.org> Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
154 lines
3.7 KiB
C
154 lines
3.7 KiB
C
// 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/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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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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struct resource *res;
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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pmu_base_addr = devm_ioremap_resource(dev, res);
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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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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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