diff options
author | Pankaj Dubey <pankaj.dubey@samsung.com> | 2015-12-18 03:32:16 (GMT) |
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committer | Krzysztof Kozlowski <k.kozlowski@samsung.com> | 2016-02-25 01:18:07 (GMT) |
commit | bfce552d0b10e8fd79e703c67c084b4cf89ad68a (patch) | |
tree | 1918e8bcbbb0b960f985aca484e64f203c463796 /arch/arm/mach-exynos/pmu.c | |
parent | 92c4bf04735130023188995cb5dbc21fdedda88c (diff) | |
download | linux-bfce552d0b10e8fd79e703c67c084b4cf89ad68a.tar.xz |
drivers: soc: Add support for Exynos PMU driver
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>
Diffstat (limited to 'arch/arm/mach-exynos/pmu.c')
-rw-r--r-- | arch/arm/mach-exynos/pmu.c | 141 |
1 files changed, 0 insertions, 141 deletions
diff --git a/arch/arm/mach-exynos/pmu.c b/arch/arm/mach-exynos/pmu.c deleted file mode 100644 index 0acdfd8..0000000 --- a/arch/arm/mach-exynos/pmu.c +++ /dev/null @@ -1,141 +0,0 @@ -/* - * Copyright (c) 2011-2014 Samsung Electronics Co., Ltd. - * http://www.samsung.com/ - * - * EXYNOS - CPU PMU(Power Management Unit) support - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#include <linux/of.h> -#include <linux/of_address.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) - 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); - } -} - -/* - * PMU platform driver and devicetree bindings. - */ -static const struct of_device_id exynos_pmu_of_device_ids[] = { - { - .compatible = "samsung,exynos3250-pmu", - .data = &exynos3250_pmu_data, - }, { - .compatible = "samsung,exynos4210-pmu", - .data = &exynos4210_pmu_data, - }, { - .compatible = "samsung,exynos4212-pmu", - .data = &exynos4212_pmu_data, - }, { - .compatible = "samsung,exynos4412-pmu", - .data = &exynos4412_pmu_data, - }, { - .compatible = "samsung,exynos5250-pmu", - .data = &exynos5250_pmu_data, - }, { - .compatible = "samsung,exynos5420-pmu", - .data = &exynos5420_pmu_data, - }, - { /*sentinel*/ }, -}; - -static int exynos_pmu_probe(struct platform_device *pdev) -{ - const struct of_device_id *match; - struct device *dev = &pdev->dev; - struct resource *res; - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - pmu_base_addr = devm_ioremap_resource(dev, res); - 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) { - dev_err(dev, "Cannot allocate memory.\n"); - return -ENOMEM; - } - pmu_context->dev = dev; - - match = of_match_node(exynos_pmu_of_device_ids, dev->of_node); - - pmu_context->pmu_data = match->data; - - if (pmu_context->pmu_data->pmu_init) - pmu_context->pmu_data->pmu_init(); - - platform_set_drvdata(pdev, pmu_context); - - 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); |