1 // SPDX-License-Identifier: GPL-2.0
3  * Renesas R-Car V3U System Controller
22 #include <dt-bindings/power/r8a779a0-sysc.h>
28 #define PD_SCU		BIT(1)	/* Area contains SCU and L2 cache */
32 #define PD_ALWAYS_ON	PD_NO_CR	  /* Always-on area */
40 	int parent;		/* -1 if none */
45  * SoC-specific Power Area Description
53 	{ "always-on",	R8A779A0_PD_ALWAYS_ON, -1, PD_ALWAYS_ON },
68 	{ "3dg-a",	R8A779A0_PD_3DG_A, R8A779A0_PD_ALWAYS_ON },
69 	{ "3dg-b",	R8A779A0_PD_3DG_B, R8A779A0_PD_3DG_A },
106 #define SYSCPONSR(x)	(0x800 + ((x) * 0x4)) /* Power-ON Status Register 0 */
107 #define SYSCPOFFSR(x)	(0x808 + ((x) * 0x4)) /* Power-OFF Status Register */
119 #define PWRON_PWROFF		BIT(0)	/* Power-ON/OFF request */
125 #define PDRSR_OFF		BIT(0)	/* Power-OFF state */
126 #define PDRSR_ON		BIT(4)	/* Power-ON state */
127 #define PDRSR_OFF_STATE		BIT(8)  /* Processing Power-OFF sequence */
128 #define PDRSR_ON_STATE		BIT(12) /* Processing Power-ON sequence */
162 		return -EAGAIN;  in r8a779a0_sysc_pwr_on_off()
182 		return -EIO;  in clear_irq_flags()
232 		ret = -EIO;  in r8a779a0_sysc_power()
241 		ret = -EIO;  in r8a779a0_sysc_power()
253 	pr_debug("sysc power %s domain %d: %08x -> %d\n", on ? "on" : "off",  in r8a779a0_sysc_power()
284 	struct r8a779a0_sysc_pd *pd = to_r8a779a0_pd(genpd);  in r8a779a0_sysc_pd_power_off()  local
286 	pr_debug("%s: %s\n", __func__, genpd->name);  in r8a779a0_sysc_pd_power_off()
287 	return r8a779a0_sysc_power(pd->pdr, false);  in r8a779a0_sysc_pd_power_off()
292 	struct r8a779a0_sysc_pd *pd = to_r8a779a0_pd(genpd);  in r8a779a0_sysc_pd_power_on()  local
294 	pr_debug("%s: %s\n", __func__, genpd->name);  in r8a779a0_sysc_pd_power_on()
295 	return r8a779a0_sysc_power(pd->pdr, true);  in r8a779a0_sysc_pd_power_on()
298 static int __init r8a779a0_sysc_pd_setup(struct r8a779a0_sysc_pd *pd)  in r8a779a0_sysc_pd_setup()  argument
300 	struct generic_pm_domain *genpd = &pd->genpd;  in r8a779a0_sysc_pd_setup()
301 	const char *name = pd->genpd.name;  in r8a779a0_sysc_pd_setup()
304 	if (pd->flags & PD_CPU) {  in r8a779a0_sysc_pd_setup()
310 		genpd->flags |= GENPD_FLAG_ALWAYS_ON;  in r8a779a0_sysc_pd_setup()
311 	} else if (pd->flags & PD_SCU) {  in r8a779a0_sysc_pd_setup()
313 		 * This domain contains an SCU and cache-controller, and  in r8a779a0_sysc_pd_setup()
317 		pr_debug("PM domain %s contains %s\n", name, "SCU");  in r8a779a0_sysc_pd_setup()
318 		genpd->flags |= GENPD_FLAG_ALWAYS_ON;  in r8a779a0_sysc_pd_setup()
319 	} else if (pd->flags & PD_NO_CR) {  in r8a779a0_sysc_pd_setup()
323 		genpd->flags |= GENPD_FLAG_ALWAYS_ON;  in r8a779a0_sysc_pd_setup()
326 	if (!(pd->flags & (PD_CPU | PD_SCU))) {  in r8a779a0_sysc_pd_setup()
328 		genpd->flags |= GENPD_FLAG_PM_CLK | GENPD_FLAG_ACTIVE_WAKEUP;  in r8a779a0_sysc_pd_setup()
329 		genpd->attach_dev = cpg_mssr_attach_dev;  in r8a779a0_sysc_pd_setup()
330 		genpd->detach_dev = cpg_mssr_detach_dev;  in r8a779a0_sysc_pd_setup()
333 	genpd->power_off = r8a779a0_sysc_pd_power_off;  in r8a779a0_sysc_pd_setup()
334 	genpd->power_on = r8a779a0_sysc_pd_power_on;  in r8a779a0_sysc_pd_setup()
336 	if (pd->flags & (PD_CPU | PD_NO_CR)) {  in r8a779a0_sysc_pd_setup()
338 		pr_debug("%s: Not touching %s\n", __func__, genpd->name);  in r8a779a0_sysc_pd_setup()
342 	if (!r8a779a0_sysc_power_is_off(pd->pdr)) {  in r8a779a0_sysc_pd_setup()
343 		pr_debug("%s: %s is already powered\n", __func__, genpd->name);  in r8a779a0_sysc_pd_setup()
347 	r8a779a0_sysc_power(pd->pdr, true);  in r8a779a0_sysc_pd_setup()
358 	{ .compatible = "renesas,r8a779a0-sysc", .data = &r8a779a0_sysc_info },
381 		return -ENODEV;  in r8a779a0_sysc_pd_init()
383 	info = match->data;  in r8a779a0_sysc_pd_init()
388 		error = -ENOMEM;  in r8a779a0_sysc_pd_init()
396 		error = -ENOMEM;  in r8a779a0_sysc_pd_init()
400 	domains->onecell_data.domains = domains->domains;  in r8a779a0_sysc_pd_init()
401 	domains->onecell_data.num_domains = ARRAY_SIZE(domains->domains);  in r8a779a0_sysc_pd_init()
402 	r8a779a0_sysc_onecell_data = &domains->onecell_data;  in r8a779a0_sysc_pd_init()
404 	for (i = 0; i < info->num_areas; i++) {  in r8a779a0_sysc_pd_init()
405 		const struct r8a779a0_sysc_area *area = &info->areas[i];  in r8a779a0_sysc_pd_init()
406 		struct r8a779a0_sysc_pd *pd;  in r8a779a0_sysc_pd_init()  local
408 		if (!area->name) {  in r8a779a0_sysc_pd_init()
413 		pd = kzalloc(sizeof(*pd) + strlen(area->name) + 1, GFP_KERNEL);  in r8a779a0_sysc_pd_init()
414 		if (!pd) {  in r8a779a0_sysc_pd_init()
415 			error = -ENOMEM;  in r8a779a0_sysc_pd_init()
419 		strcpy(pd->name, area->name);  in r8a779a0_sysc_pd_init()
420 		pd->genpd.name = pd->name;  in r8a779a0_sysc_pd_init()
421 		pd->pdr = area->pdr;  in r8a779a0_sysc_pd_init()
422 		pd->flags = area->flags;  in r8a779a0_sysc_pd_init()
424 		error = r8a779a0_sysc_pd_setup(pd);  in r8a779a0_sysc_pd_init()
428 		domains->domains[area->pdr] = &pd->genpd;  in r8a779a0_sysc_pd_init()
430 		if (area->parent < 0)  in r8a779a0_sysc_pd_init()
433 		error = pm_genpd_add_subdomain(domains->domains[area->parent],  in r8a779a0_sysc_pd_init()
434 					       &pd->genpd);  in r8a779a0_sysc_pd_init()
437 				area->name, area->parent);  in r8a779a0_sysc_pd_init()
442 	error = of_genpd_add_provider_onecell(np, &domains->onecell_data);  in r8a779a0_sysc_pd_init()