^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) //
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) // Copyright (c) 2011-2014 Samsung Electronics Co., Ltd.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) // http://www.samsung.com/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) //
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) // Exynos - CPU PMU(Power Management Unit) support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/of.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/of_address.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/of_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/mfd/syscon.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/soc/samsung/exynos-regs-pmu.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/soc/samsung/exynos-pmu.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include "exynos-pmu.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) struct exynos_pmu_context {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) struct device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) const struct exynos_pmu_data *pmu_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) void __iomem *pmu_base_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) static struct exynos_pmu_context *pmu_context;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) void pmu_raw_writel(u32 val, u32 offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) writel_relaxed(val, pmu_base_addr + offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) u32 pmu_raw_readl(u32 offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) return readl_relaxed(pmu_base_addr + offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) void exynos_sys_powerdown_conf(enum sys_powerdown mode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) unsigned int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) const struct exynos_pmu_data *pmu_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) if (!pmu_context || !pmu_context->pmu_data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) pmu_data = pmu_context->pmu_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) if (pmu_data->powerdown_conf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) pmu_data->powerdown_conf(mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) if (pmu_data->pmu_config) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) for (i = 0; (pmu_data->pmu_config[i].offset != PMU_TABLE_END); i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) pmu_raw_writel(pmu_data->pmu_config[i].val[mode],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) pmu_data->pmu_config[i].offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) if (pmu_data->powerdown_conf_extra)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) pmu_data->powerdown_conf_extra(mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) * Split the data between ARM architectures because it is relatively big
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) * and useless on other arch.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) #ifdef CONFIG_EXYNOS_PMU_ARM_DRIVERS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) #define exynos_pmu_data_arm_ptr(data) (&data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) #define exynos_pmu_data_arm_ptr(data) NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) * PMU platform driver and devicetree bindings.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) static const struct of_device_id exynos_pmu_of_device_ids[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) .compatible = "samsung,exynos3250-pmu",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) .data = exynos_pmu_data_arm_ptr(exynos3250_pmu_data),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) }, {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) .compatible = "samsung,exynos4210-pmu",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) .data = exynos_pmu_data_arm_ptr(exynos4210_pmu_data),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) }, {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) .compatible = "samsung,exynos4412-pmu",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) .data = exynos_pmu_data_arm_ptr(exynos4412_pmu_data),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) }, {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) .compatible = "samsung,exynos5250-pmu",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) .data = exynos_pmu_data_arm_ptr(exynos5250_pmu_data),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) }, {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) .compatible = "samsung,exynos5410-pmu",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) }, {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) .compatible = "samsung,exynos5420-pmu",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) .data = exynos_pmu_data_arm_ptr(exynos5420_pmu_data),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) }, {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) .compatible = "samsung,exynos5433-pmu",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) }, {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) .compatible = "samsung,exynos7-pmu",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) { /*sentinel*/ },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) struct regmap *exynos_get_pmu_regmap(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) struct device_node *np = of_find_matching_node(NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) exynos_pmu_of_device_ids);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) if (np)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) return syscon_node_to_regmap(np);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) return ERR_PTR(-ENODEV);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) EXPORT_SYMBOL_GPL(exynos_get_pmu_regmap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) static int exynos_pmu_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) struct device *dev = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) pmu_base_addr = devm_platform_ioremap_resource(pdev, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) if (IS_ERR(pmu_base_addr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) return PTR_ERR(pmu_base_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) pmu_context = devm_kzalloc(&pdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) sizeof(struct exynos_pmu_context),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) if (!pmu_context)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) pmu_context->dev = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) pmu_context->pmu_data = of_device_get_match_data(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) if (pmu_context->pmu_data && pmu_context->pmu_data->pmu_init)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) pmu_context->pmu_data->pmu_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) platform_set_drvdata(pdev, pmu_context);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) if (devm_of_platform_populate(dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) dev_err(dev, "Error populating children, reboot and poweroff might not work properly\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) dev_dbg(dev, "Exynos PMU Driver probe done\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) static struct platform_driver exynos_pmu_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) .name = "exynos-pmu",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) .of_match_table = exynos_pmu_of_device_ids,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) .probe = exynos_pmu_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) static int __init exynos_pmu_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) return platform_driver_register(&exynos_pmu_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) postcore_initcall(exynos_pmu_init);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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