1 // SPDX-License-Identifier: GPL-2.0
3 // Copyright (c) 2011-2014 Samsung Electronics Co., Ltd.
6 // Exynos - CPU PMU(Power Management Unit) support
8 #include <linux/arm-smccc.h>
18 #include <linux/soc/samsung/exynos-regs-pmu.h>
19 #include <linux/soc/samsung/exynos-pmu.h>
21 #include "exynos-pmu.h"
52 /* Write to a protected PMU register. */
62 	/* returns -EINVAL if access isn't allowed or 0 */  in tensor_sec_reg_write()
69 /* Read/Modify/Write a protected PMU register. */
79 	/* returns -EINVAL if access isn't allowed or 0 */  in tensor_sec_reg_rmw()
87  * Read a protected PMU register. All PMU registers can be read by Linux.
100  * the PMU register will be accessed by multiple masters.
102  * For example, to set bits 13:8 in PMU reg offset 0x3e80
105  * Set bit 8, and clear bits 13:9 PMU reg offset 0x3e80
176 	if (!pmu_context || !pmu_context->pmu_data)  in exynos_sys_powerdown_conf()
179 	pmu_data = pmu_context->pmu_data;  in exynos_sys_powerdown_conf()
181 	if (pmu_data->powerdown_conf)  in exynos_sys_powerdown_conf()
182 		pmu_data->powerdown_conf(mode);  in exynos_sys_powerdown_conf()
184 	if (pmu_data->pmu_config) {  in exynos_sys_powerdown_conf()
185 		for (i = 0; (pmu_data->pmu_config[i].offset != PMU_TABLE_END); i++)  in exynos_sys_powerdown_conf()
186 			pmu_raw_writel(pmu_data->pmu_config[i].val[mode],  in exynos_sys_powerdown_conf()
187 					pmu_data->pmu_config[i].offset);  in exynos_sys_powerdown_conf()
190 	if (pmu_data->powerdown_conf_extra)  in exynos_sys_powerdown_conf()
191 		pmu_data->powerdown_conf_extra(mode);  in exynos_sys_powerdown_conf()
193 	if (pmu_data->pmu_config_extra) {  in exynos_sys_powerdown_conf()
194 		for (i = 0; pmu_data->pmu_config_extra[i].offset != PMU_TABLE_END; i++)  in exynos_sys_powerdown_conf()
195 			pmu_raw_writel(pmu_data->pmu_config_extra[i].val[mode],  in exynos_sys_powerdown_conf()
196 				       pmu_data->pmu_config_extra[i].offset);  in exynos_sys_powerdown_conf()
228  * PMU platform driver and devicetree bindings.
232 		.compatible = "google,gs101-pmu",
235 		.compatible = "samsung,exynos3250-pmu",
238 		.compatible = "samsung,exynos4210-pmu",
241 		.compatible = "samsung,exynos4212-pmu",
244 		.compatible = "samsung,exynos4412-pmu",
247 		.compatible = "samsung,exynos5250-pmu",
250 		.compatible = "samsung,exynos5410-pmu",
252 		.compatible = "samsung,exynos5420-pmu",
255 		.compatible = "samsung,exynos5433-pmu",
257 		.compatible = "samsung,exynos7-pmu",
259 		.compatible = "samsung,exynos850-pmu",
265 	{ .name = "exynos-clkout", },
269  * exynos_get_pmu_regmap() - Obtain pmureg regmap
282 	return ERR_PTR(-ENODEV);  in exynos_get_pmu_regmap()
287  * exynos_get_pmu_regmap_by_phandle() - Obtain pmureg regmap via phandle
288  * @np: Device node holding PMU phandle property
308 		return ERR_PTR(-ENODEV);  in exynos_get_pmu_regmap_by_phandle()
311 	 * Determine if exynos-pmu device has probed and therefore regmap  in exynos_get_pmu_regmap_by_phandle()
313 	 * return -EPROBE_DEFER.  in exynos_get_pmu_regmap_by_phandle()
322 		return ERR_PTR(-EPROBE_DEFER);  in exynos_get_pmu_regmap_by_phandle()
330 	struct device *dev = &pdev->dev;  in exynos_pmu_probe()
340 	pmu_context = devm_kzalloc(&pdev->dev,  in exynos_pmu_probe()
344 		return -ENOMEM;  in exynos_pmu_probe()
348 		return -ENODEV;  in exynos_pmu_probe()
350 	pmu_context->pmu_data = of_device_get_match_data(dev);  in exynos_pmu_probe()
352 	/* For SoCs that secure PMU register writes use custom regmap */  in exynos_pmu_probe()
353 	if (pmu_context->pmu_data && pmu_context->pmu_data->pmu_secure) {  in exynos_pmu_probe()
355 		pmu_regmcfg.max_register = resource_size(res) -  in exynos_pmu_probe()
359 					  (void *)(uintptr_t)res->start,  in exynos_pmu_probe()
363 			return dev_err_probe(&pdev->dev, PTR_ERR(regmap),  in exynos_pmu_probe()
366 		ret = of_syscon_register_regmap(dev->of_node, regmap);  in exynos_pmu_probe()
371 		regmap = syscon_node_to_regmap(dev->of_node);  in exynos_pmu_probe()
373 			return dev_err_probe(&pdev->dev, PTR_ERR(regmap),  in exynos_pmu_probe()
377 	pmu_context->pmureg = regmap;  in exynos_pmu_probe()
378 	pmu_context->dev = dev;  in exynos_pmu_probe()
380 	if (pmu_context->pmu_data && pmu_context->pmu_data->pmu_init)  in exynos_pmu_probe()
381 		pmu_context->pmu_data->pmu_init();  in exynos_pmu_probe()
393 	dev_dbg(dev, "Exynos PMU Driver probe done\n");  in exynos_pmu_probe()
399 		.name   = "exynos-pmu",