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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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bfce552d0b
This patch moves Exynos PMU driver implementation from "arm/mach-exynos" to "drivers/soc/samsung". This driver is mainly used for setting misc bits of register from PMU IP of Exynos SoC which will be required to configure before Suspend/Resume. Currently all these settings are done in "arch/arm/mach-exynos/pmu.c" but moving ahead for ARM64 based SoC support, there is a need of this PMU driver in driver/* folder. This driver uses existing DT binding information and there should be no functionality change in the supported platforms. Signed-off-by: Amit Daniel Kachhap <amitdanielk@gmail.com> [tested on Peach-Pi (Exynos5880)] Signed-off-by: Pankaj Dubey <pankaj.dubey@samsung.com> Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> [for testing on Trats2 (Exynos4412) and Odroid XU3 (Exynos5422)] Tested-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> [k.kozlowski: Rebased, add necessary infrastructure for building and selecting drivers/soc because original patchset was on top of movement SROMc to drivers/soc] Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
142 lines
3.3 KiB
C
142 lines
3.3 KiB
C
/*
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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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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/of.h>
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#include <linux/of_address.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)
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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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if (pmu_data->pmu_config_extra) {
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for (i = 0; pmu_data->pmu_config_extra[i].offset != PMU_TABLE_END; i++)
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pmu_raw_writel(pmu_data->pmu_config_extra[i].val[mode],
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pmu_data->pmu_config_extra[i].offset);
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}
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}
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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 = &exynos3250_pmu_data,
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}, {
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.compatible = "samsung,exynos4210-pmu",
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.data = &exynos4210_pmu_data,
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}, {
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.compatible = "samsung,exynos4212-pmu",
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.data = &exynos4212_pmu_data,
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}, {
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.compatible = "samsung,exynos4412-pmu",
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.data = &exynos4412_pmu_data,
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}, {
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.compatible = "samsung,exynos5250-pmu",
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.data = &exynos5250_pmu_data,
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}, {
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.compatible = "samsung,exynos5420-pmu",
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.data = &exynos5420_pmu_data,
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},
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{ /*sentinel*/ },
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};
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static int exynos_pmu_probe(struct platform_device *pdev)
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{
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const struct of_device_id *match;
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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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dev_err(dev, "Cannot allocate memory.\n");
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return -ENOMEM;
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}
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pmu_context->dev = dev;
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match = of_match_node(exynos_pmu_of_device_ids, dev->of_node);
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pmu_context->pmu_data = match->data;
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if (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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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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