[deliverable/linux.git] / arch / arm / mach-shmobile / pm-rmobile.c

/*
 * rmobile power management support
 *
 * Copyright (C) 2012  Renesas Solutions Corp.
 * Copyright (C) 2012  Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
 * Copyright (C) 2014  Glider bvba
 *
 * based on pm-sh7372.c
 *  Copyright (C) 2011 Magnus Damm
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 */
#include <linux/console.h>
#include <linux/delay.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/pm.h>
#include <linux/pm_clock.h>
#include <linux/slab.h>

#include <asm/io.h>

#include "pm-rmobile.h"

/* SYSC */
#define SPDCR		0x08	/* SYS Power Down Control Register */
#define SWUCR		0x14	/* SYS Wakeup Control Register */
#define PSTR		0x80	/* Power Status Register */

#define PSTR_RETRIES	100
#define PSTR_DELAY_US	10

static int rmobile_pd_power_down(struct generic_pm_domain *genpd)
{
	struct rmobile_pm_domain *rmobile_pd = to_rmobile_pd(genpd);
	unsigned int mask;

	if (rmobile_pd->bit_shift == ~0)
		return -EBUSY;

	mask = 1 << rmobile_pd->bit_shift;
	if (rmobile_pd->suspend) {
		int ret = rmobile_pd->suspend();

		if (ret)
			return ret;
	}

	if (__raw_readl(rmobile_pd->base + PSTR) & mask) {
		unsigned int retry_count;
		__raw_writel(mask, rmobile_pd->base + SPDCR);

		for (retry_count = PSTR_RETRIES; retry_count; retry_count--) {
			if (!(__raw_readl(rmobile_pd->base + SPDCR) & mask))
				break;
			cpu_relax();
		}
	}

	if (!rmobile_pd->no_debug)
		pr_debug("%s: Power off, 0x%08x -> PSTR = 0x%08x\n",
			 genpd->name, mask,
			 __raw_readl(rmobile_pd->base + PSTR));

	return 0;
}

static int __rmobile_pd_power_up(struct rmobile_pm_domain *rmobile_pd,
				 bool do_resume)
{
	unsigned int mask;
	unsigned int retry_count;
	int ret = 0;

	if (rmobile_pd->bit_shift == ~0)
		return 0;

	mask = 1 << rmobile_pd->bit_shift;
	if (__raw_readl(rmobile_pd->base + PSTR) & mask)
		goto out;

	__raw_writel(mask, rmobile_pd->base + SWUCR);

	for (retry_count = 2 * PSTR_RETRIES; retry_count; retry_count--) {
		if (!(__raw_readl(rmobile_pd->base + SWUCR) & mask))
			break;
		if (retry_count > PSTR_RETRIES)
			udelay(PSTR_DELAY_US);
		else
			cpu_relax();
	}
	if (!retry_count)
		ret = -EIO;

	if (!rmobile_pd->no_debug)
		pr_debug("%s: Power on, 0x%08x -> PSTR = 0x%08x\n",
			 rmobile_pd->genpd.name, mask,
			 __raw_readl(rmobile_pd->base + PSTR));

out:
	if (ret == 0 && rmobile_pd->resume && do_resume)
		rmobile_pd->resume();

	return ret;
}

static int rmobile_pd_power_up(struct generic_pm_domain *genpd)
{
	return __rmobile_pd_power_up(to_rmobile_pd(genpd), true);
}

static bool rmobile_pd_active_wakeup(struct device *dev)
{
	return true;
}

static int rmobile_pd_attach_dev(struct generic_pm_domain *domain,
				 struct device *dev)
{
	int error;

	error = pm_clk_create(dev);
	if (error) {
		dev_err(dev, "pm_clk_create failed %d\n", error);
		return error;
	}

	error = pm_clk_add(dev, NULL);
	if (error) {
		dev_err(dev, "pm_clk_add failed %d\n", error);
		goto fail;
	}

	return 0;

fail:
	pm_clk_destroy(dev);
	return error;
}

static void rmobile_pd_detach_dev(struct generic_pm_domain *domain,
				  struct device *dev)
{
	pm_clk_destroy(dev);
}

static void rmobile_init_pm_domain(struct rmobile_pm_domain *rmobile_pd)
{
	struct generic_pm_domain *genpd = &rmobile_pd->genpd;
	struct dev_power_governor *gov = rmobile_pd->gov;

	genpd->flags = GENPD_FLAG_PM_CLK;
	pm_genpd_init(genpd, gov ? : &simple_qos_governor, false);
	genpd->dev_ops.active_wakeup	= rmobile_pd_active_wakeup;
	genpd->power_off		= rmobile_pd_power_down;
	genpd->power_on			= rmobile_pd_power_up;
	genpd->attach_dev		= rmobile_pd_attach_dev;
	genpd->detach_dev		= rmobile_pd_detach_dev;
	__rmobile_pd_power_up(rmobile_pd, false);
}

#ifdef CONFIG_ARCH_SHMOBILE_LEGACY

void rmobile_init_domains(struct rmobile_pm_domain domains[], int num)
{
	int j;

	for (j = 0; j < num; j++)
		rmobile_init_pm_domain(&domains[j]);
}

void rmobile_add_device_to_domain_td(const char *domain_name,
				     struct platform_device *pdev,
				     struct gpd_timing_data *td)
{
	struct device *dev = &pdev->dev;

	__pm_genpd_name_add_device(domain_name, dev, td);
}

void rmobile_add_devices_to_domains(struct pm_domain_device data[],
				    int size)
{
	struct gpd_timing_data latencies = {
		.stop_latency_ns = DEFAULT_DEV_LATENCY_NS,
		.start_latency_ns = DEFAULT_DEV_LATENCY_NS,
		.save_state_latency_ns = DEFAULT_DEV_LATENCY_NS,
		.restore_state_latency_ns = DEFAULT_DEV_LATENCY_NS,
	};
	int j;

	for (j = 0; j < size; j++)
		rmobile_add_device_to_domain_td(data[j].domain_name,
						data[j].pdev, &latencies);
}

#else /* !CONFIG_ARCH_SHMOBILE_LEGACY */

static int rmobile_pd_suspend_cpu(void)
{
	/*
	 * This domain contains the CPU core and therefore it should
	 * only be turned off if the CPU is not in use.
	 */
	return -EBUSY;
}

static int rmobile_pd_suspend_console(void)
{
	/*
	 * Serial consoles make use of SCIF hardware located in this domain,
	 * hence keep the power domain on if "no_console_suspend" is set.
	 */
	return console_suspend_enabled ? 0 : -EBUSY;
}

static int rmobile_pd_suspend_debug(void)
{
	/*
	 * This domain contains the Coresight-ETM hardware block and
	 * therefore it should only be turned off if the debug module is
	 * not in use.
	 */
	return -EBUSY;
}

#define MAX_NUM_CPU_PDS		8

static unsigned int num_cpu_pds __initdata;
static struct device_node *cpu_pds[MAX_NUM_CPU_PDS] __initdata;
static struct device_node *console_pd __initdata;
static struct device_node *debug_pd __initdata;

static void __init get_special_pds(void)
{
	struct device_node *np, *pd;
	unsigned int i;

	/* PM domains containing CPUs */
	for_each_node_by_type(np, "cpu") {
		pd = of_parse_phandle(np, "power-domains", 0);
		if (!pd)
			continue;

		for (i = 0; i < num_cpu_pds; i++)
			if (pd == cpu_pds[i])
				break;

		if (i < num_cpu_pds) {
			of_node_put(pd);
			continue;
		}

		if (num_cpu_pds == MAX_NUM_CPU_PDS) {
			pr_warn("Too many CPU PM domains\n");
			of_node_put(pd);
			continue;
		}

		cpu_pds[num_cpu_pds++] = pd;
	}

	/* PM domain containing console */
	if (of_stdout)
		console_pd = of_parse_phandle(of_stdout, "power-domains", 0);

	/* PM domain containing Coresight-ETM */
	np = of_find_compatible_node(NULL, NULL, "arm,coresight-etm3x");
	if (np) {
		debug_pd = of_parse_phandle(np, "power-domains", 0);
		of_node_put(np);
	}
}

static void __init put_special_pds(void)
{
	unsigned int i;

	for (i = 0; i < num_cpu_pds; i++)
		of_node_put(cpu_pds[i]);
	of_node_put(console_pd);
	of_node_put(debug_pd);
}

static bool __init pd_contains_cpu(const struct device_node *pd)
{
	unsigned int i;

	for (i = 0; i < num_cpu_pds; i++)
		if (pd == cpu_pds[i])
			return true;

	return false;
}

static void __init rmobile_setup_pm_domain(struct device_node *np,
					   struct rmobile_pm_domain *pd)
{
	const char *name = pd->genpd.name;

	if (pd_contains_cpu(np)) {
		pr_debug("PM domain %s contains CPU\n", name);
		pd->gov = &pm_domain_always_on_gov;
		pd->suspend = rmobile_pd_suspend_cpu;
	} else if (np == console_pd) {
		pr_debug("PM domain %s contains serial console\n", name);
		pd->gov = &pm_domain_always_on_gov;
		pd->suspend = rmobile_pd_suspend_console;
	} else if (np == debug_pd) {
		pr_debug("PM domain %s contains Coresight-ETM\n", name);
		pd->gov = &pm_domain_always_on_gov;
		pd->suspend = rmobile_pd_suspend_debug;
	}

	rmobile_init_pm_domain(pd);
}

static int __init rmobile_add_pm_domains(void __iomem *base,
					 struct device_node *parent,
					 struct generic_pm_domain *genpd_parent)
{
	struct device_node *np;

	for_each_child_of_node(parent, np) {
		struct rmobile_pm_domain *pd;
		u32 idx = ~0;

		if (of_property_read_u32(np, "reg", &idx)) {
			/* always-on domain */
		}

		pd = kzalloc(sizeof(*pd), GFP_KERNEL);
		if (!pd)
			return -ENOMEM;

		pd->genpd.name = np->name;
		pd->base = base;
		pd->bit_shift = idx;

		rmobile_setup_pm_domain(np, pd);
		if (genpd_parent)
			pm_genpd_add_subdomain(genpd_parent, &pd->genpd);
		of_genpd_add_provider_simple(np, &pd->genpd);

		rmobile_add_pm_domains(base, np, &pd->genpd);
	}
	return 0;
}

static int __init rmobile_init_pm_domains(void)
{
	struct device_node *np, *pmd;
	bool scanned = false;
	void __iomem *base;
	int ret = 0;

	for_each_compatible_node(np, NULL, "renesas,sysc-rmobile") {
		base = of_iomap(np, 0);
		if (!base) {
			pr_warn("%s cannot map reg 0\n", np->full_name);
			continue;
		}

		pmd = of_get_child_by_name(np, "pm-domains");
		if (!pmd) {
			pr_warn("%s lacks pm-domains node\n", np->full_name);
			continue;
		}

		if (!scanned) {
			/* Find PM domains containing special blocks */
			get_special_pds();
			scanned = true;
		}

		ret = rmobile_add_pm_domains(base, pmd, NULL);
		of_node_put(pmd);
		if (ret) {
			of_node_put(np);
			break;
		}
	}

	put_special_pds();

	return ret;
}

core_initcall(rmobile_init_pm_domains);

#endif /* !CONFIG_ARCH_SHMOBILE_LEGACY */
Commit	Line	Data
8f45b112 KM	1	/*
	2	* rmobile power management support
	3	*
	4	* Copyright (C) 2012 Renesas Solutions Corp.
	5	* Copyright (C) 2012 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
2173fc7c	6	* Copyright (C) 2014 Glider bvba
8f45b112 KM	7	*
	8	* based on pm-sh7372.c
	9	* Copyright (C) 2011 Magnus Damm
	10	*
	11	* This file is subject to the terms and conditions of the GNU General Public
	12	* License. See the file "COPYING" in the main directory of this archive
	13	* for more details.
	14	*/
	15	#include <linux/console.h>
	16	#include <linux/delay.h>
2173fc7c GU	17	#include <linux/of.h>
	18	#include <linux/of_address.h>
	19	#include <linux/of_platform.h>
8f45b112 KM	20	#include <linux/platform_device.h>
	21	#include <linux/pm.h>
	22	#include <linux/pm_clock.h>
2173fc7c GU	23	#include <linux/slab.h>
2173fc7c GU	24
8f45b112	25	#include <asm/io.h>
2173fc7c	26
6b8b0cb4	27	#include "pm-rmobile.h"
8f45b112 KM	28
8f45b112 KM	29	/* SYSC */
25717b85 GU	30	#define SPDCR 0x08 /* SYS Power Down Control Register */
	31	#define SWUCR 0x14 /* SYS Wakeup Control Register */
	32	#define PSTR 0x80 /* Power Status Register */
8f45b112 KM	33
	34	#define PSTR_RETRIES 100
	35	#define PSTR_DELAY_US 10
	36
8f45b112 KM	37	static int rmobile_pd_power_down(struct generic_pm_domain *genpd)
	38	{
	39	struct rmobile_pm_domain *rmobile_pd = to_rmobile_pd(genpd);
2173fc7c GU	40	unsigned int mask;
	41
	42	if (rmobile_pd->bit_shift == ~0)
	43	return -EBUSY;
8f45b112	44
2173fc7c	45	mask = 1 << rmobile_pd->bit_shift;
8f45b112 KM	46	if (rmobile_pd->suspend) {
	47	int ret = rmobile_pd->suspend();
	48
	49	if (ret)
	50	return ret;
	51	}
	52
25717b85	53	if (__raw_readl(rmobile_pd->base + PSTR) & mask) {
8f45b112	54	unsigned int retry_count;
25717b85	55	__raw_writel(mask, rmobile_pd->base + SPDCR);
8f45b112 KM	56
8f45b112 KM	57	for (retry_count = PSTR_RETRIES; retry_count; retry_count--) {
25717b85	58	if (!(__raw_readl(rmobile_pd->base + SPDCR) & mask))
8f45b112 KM	59	break;
	60	cpu_relax();
	61	}
	62	}
	63
	64	if (!rmobile_pd->no_debug)
	65	pr_debug("%s: Power off, 0x%08x -> PSTR = 0x%08x\n",
25717b85 GU	66	genpd->name, mask,
25717b85 GU	67	__raw_readl(rmobile_pd->base + PSTR));
8f45b112 KM	68
	69	return 0;
	70	}
	71
	72	static int __rmobile_pd_power_up(struct rmobile_pm_domain *rmobile_pd,
	73	bool do_resume)
	74	{
2173fc7c	75	unsigned int mask;
8f45b112 KM	76	unsigned int retry_count;
	77	int ret = 0;
	78
2173fc7c GU	79	if (rmobile_pd->bit_shift == ~0)
	80	return 0;
	81
	82	mask = 1 << rmobile_pd->bit_shift;
25717b85	83	if (__raw_readl(rmobile_pd->base + PSTR) & mask)
8f45b112 KM	84	goto out;
8f45b112 KM	85
25717b85	86	__raw_writel(mask, rmobile_pd->base + SWUCR);
8f45b112 KM	87
8f45b112 KM	88	for (retry_count = 2 * PSTR_RETRIES; retry_count; retry_count--) {
25717b85	89	if (!(__raw_readl(rmobile_pd->base + SWUCR) & mask))
8f45b112 KM	90	break;
	91	if (retry_count > PSTR_RETRIES)
	92	udelay(PSTR_DELAY_US);
	93	else
	94	cpu_relax();
	95	}
	96	if (!retry_count)
	97	ret = -EIO;
	98
	99	if (!rmobile_pd->no_debug)
	100	pr_debug("%s: Power on, 0x%08x -> PSTR = 0x%08x\n",
25717b85 GU	101	rmobile_pd->genpd.name, mask,
25717b85 GU	102	__raw_readl(rmobile_pd->base + PSTR));
8f45b112 KM	103
	104	out:
	105	if (ret == 0 && rmobile_pd->resume && do_resume)
	106	rmobile_pd->resume();
	107
	108	return ret;
	109	}
	110
	111	static int rmobile_pd_power_up(struct generic_pm_domain *genpd)
	112	{
	113	return __rmobile_pd_power_up(to_rmobile_pd(genpd), true);
	114	}
	115
	116	static bool rmobile_pd_active_wakeup(struct device *dev)
	117	{
ab496b9d	118	return true;
8f45b112 KM	119	}
8f45b112 KM	120
4b9d62e0 GU	121	static int rmobile_pd_attach_dev(struct generic_pm_domain *domain,
	122	struct device *dev)
	123	{
	124	int error;
	125
	126	error = pm_clk_create(dev);
	127	if (error) {
	128	dev_err(dev, "pm_clk_create failed %d\n", error);
	129	return error;
	130	}
	131
	132	error = pm_clk_add(dev, NULL);
	133	if (error) {
	134	dev_err(dev, "pm_clk_add failed %d\n", error);
	135	goto fail;
	136	}
	137
	138	return 0;
	139
	140	fail:
	141	pm_clk_destroy(dev);
	142	return error;
	143	}
	144
	145	static void rmobile_pd_detach_dev(struct generic_pm_domain *domain,
	146	struct device *dev)
	147	{
	148	pm_clk_destroy(dev);
	149	}
	150
a62595d3	151	static void rmobile_init_pm_domain(struct rmobile_pm_domain *rmobile_pd)
8f45b112 KM	152	{
	153	struct generic_pm_domain *genpd = &rmobile_pd->genpd;
	154	struct dev_power_governor *gov = rmobile_pd->gov;
	155
cffa9138	156	genpd->flags = GENPD_FLAG_PM_CLK;
8f45b112	157	pm_genpd_init(genpd, gov ? : &simple_qos_governor, false);
8f45b112	158	genpd->dev_ops.active_wakeup = rmobile_pd_active_wakeup;
8f45b112 KM	159	genpd->power_off = rmobile_pd_power_down;
8f45b112 KM	160	genpd->power_on = rmobile_pd_power_up;
4b9d62e0 GU	161	genpd->attach_dev = rmobile_pd_attach_dev;
4b9d62e0 GU	162	genpd->detach_dev = rmobile_pd_detach_dev;
8f45b112 KM	163	__rmobile_pd_power_up(rmobile_pd, false);
	164	}
	165
2173fc7c GU	166	#ifdef CONFIG_ARCH_SHMOBILE_LEGACY
2173fc7c GU	167
0d09f450 RW	168	void rmobile_init_domains(struct rmobile_pm_domain domains[], int num)
	169	{
	170	int j;
	171
	172	for (j = 0; j < num; j++)
	173	rmobile_init_pm_domain(&domains[j]);
	174	}
	175
455ae3a5 RW	176	void rmobile_add_device_to_domain_td(const char *domain_name,
	177	struct platform_device *pdev,
	178	struct gpd_timing_data *td)
8f45b112 KM	179	{
	180	struct device *dev = &pdev->dev;
	181
455ae3a5	182	__pm_genpd_name_add_device(domain_name, dev, td);
8f45b112 KM	183	}
8f45b112 KM	184
ac18e02d RW	185	void rmobile_add_devices_to_domains(struct pm_domain_device data[],
ac18e02d RW	186	int size)
8f45b112	187	{
ac18e02d RW	188	struct gpd_timing_data latencies = {
	189	.stop_latency_ns = DEFAULT_DEV_LATENCY_NS,
	190	.start_latency_ns = DEFAULT_DEV_LATENCY_NS,
	191	.save_state_latency_ns = DEFAULT_DEV_LATENCY_NS,
	192	.restore_state_latency_ns = DEFAULT_DEV_LATENCY_NS,
	193	};
	194	int j;
	195
	196	for (j = 0; j < size; j++)
	197	rmobile_add_device_to_domain_td(data[j].domain_name,
	198	data[j].pdev, &latencies);
8f45b112	199	}
2173fc7c GU	200
	201	#else /* !CONFIG_ARCH_SHMOBILE_LEGACY */
	202
	203	static int rmobile_pd_suspend_cpu(void)
	204	{
	205	/*
	206	* This domain contains the CPU core and therefore it should
	207	* only be turned off if the CPU is not in use.
	208	*/
	209	return -EBUSY;
	210	}
	211
	212	static int rmobile_pd_suspend_console(void)
	213	{
	214	/*
	215	* Serial consoles make use of SCIF hardware located in this domain,
	216	* hence keep the power domain on if "no_console_suspend" is set.
	217	*/
	218	return console_suspend_enabled ? 0 : -EBUSY;
	219	}
	220
	221	static int rmobile_pd_suspend_debug(void)
	222	{
	223	/*
	224	* This domain contains the Coresight-ETM hardware block and
	225	* therefore it should only be turned off if the debug module is
	226	* not in use.
	227	*/
	228	return -EBUSY;
	229	}
	230
	231	#define MAX_NUM_CPU_PDS 8
	232
	233	static unsigned int num_cpu_pds __initdata;
	234	static struct device_node *cpu_pds[MAX_NUM_CPU_PDS] __initdata;
	235	static struct device_node *console_pd __initdata;
	236	static struct device_node *debug_pd __initdata;
	237
	238	static void __init get_special_pds(void)
	239	{
	240	struct device_node np, pd;
	241	unsigned int i;
	242
	243	/* PM domains containing CPUs */
	244	for_each_node_by_type(np, "cpu") {
	245	pd = of_parse_phandle(np, "power-domains", 0);
	246	if (!pd)
	247	continue;
	248
	249	for (i = 0; i < num_cpu_pds; i++)
	250	if (pd == cpu_pds[i])
	251	break;
	252
	253	if (i < num_cpu_pds) {
	254	of_node_put(pd);
	255	continue;
	256	}
	257
	258	if (num_cpu_pds == MAX_NUM_CPU_PDS) {
	259	pr_warn("Too many CPU PM domains\n");
	260	of_node_put(pd);
	261	continue;
	262	}
	263
264	cpu_pds[num_cpu_pds++] = pd;
265	}
266
267	/* PM domain containing console */
268	if (of_stdout)
269	console_pd = of_parse_phandle(of_stdout, "power-domains", 0);
270
271	/* PM domain containing Coresight-ETM */
272	np = of_find_compatible_node(NULL, NULL, "arm,coresight-etm3x");
273	if (np) {
274	debug_pd = of_parse_phandle(np, "power-domains", 0);
275	of_node_put(np);
276	}
277	}
278
279	static void __init put_special_pds(void)
280	{
281	unsigned int i;
282
283	for (i = 0; i < num_cpu_pds; i++)
284	of_node_put(cpu_pds[i]);
285	of_node_put(console_pd);
286	of_node_put(debug_pd);
287	}
288
289	static bool __init pd_contains_cpu(const struct device_node *pd)
290	{
291	unsigned int i;
292
293	for (i = 0; i < num_cpu_pds; i++)
294	if (pd == cpu_pds[i])
295	return true;
296
297	return false;
298	}
299
300	static void __init rmobile_setup_pm_domain(struct device_node *np,
301	struct rmobile_pm_domain *pd)
302	{
303	const char *name = pd->genpd.name;
304
305	if (pd_contains_cpu(np)) {
306	pr_debug("PM domain %s contains CPU\n", name);
307	pd->gov = &pm_domain_always_on_gov;
308	pd->suspend = rmobile_pd_suspend_cpu;
309	} else if (np == console_pd) {
310	pr_debug("PM domain %s contains serial console\n", name);
311	pd->gov = &pm_domain_always_on_gov;
312	pd->suspend = rmobile_pd_suspend_console;
313	} else if (np == debug_pd) {
314	pr_debug("PM domain %s contains Coresight-ETM\n", name);
315	pd->gov = &pm_domain_always_on_gov;
316	pd->suspend = rmobile_pd_suspend_debug;
317	}
318
319	rmobile_init_pm_domain(pd);
320	}
321
322	static int __init rmobile_add_pm_domains(void __iomem *base,
323	struct device_node *parent,
324	struct generic_pm_domain *genpd_parent)
325	{
326	struct device_node *np;
327
328	for_each_child_of_node(parent, np) {
329	struct rmobile_pm_domain *pd;
330	u32 idx = ~0;
331
332	if (of_property_read_u32(np, "reg", &idx)) {
333	/* always-on domain */
334	}
335
336	pd = kzalloc(sizeof(*pd), GFP_KERNEL);
337	if (!pd)
338	return -ENOMEM;
339
340	pd->genpd.name = np->name;
341	pd->base = base;
342	pd->bit_shift = idx;
343
344	rmobile_setup_pm_domain(np, pd);
345	if (genpd_parent)
346	pm_genpd_add_subdomain(genpd_parent, &pd->genpd);
347	of_genpd_add_provider_simple(np, &pd->genpd);
348
349	rmobile_add_pm_domains(base, np, &pd->genpd);
350	}
351	return 0;
352	}
353
354	static int __init rmobile_init_pm_domains(void)
355	{
356	struct device_node np, pmd;
357	bool scanned = false;
358	void __iomem *base;
359	int ret = 0;
360
361	for_each_compatible_node(np, NULL, "renesas,sysc-rmobile") {
362	base = of_iomap(np, 0);
363	if (!base) {
364	pr_warn("%s cannot map reg 0\n", np->full_name);
365	continue;
366	}
367
368	pmd = of_get_child_by_name(np, "pm-domains");
369	if (!pmd) {
370	pr_warn("%s lacks pm-domains node\n", np->full_name);
371	continue;
372	}
373
374	if (!scanned) {
375	/* Find PM domains containing special blocks */
376	get_special_pds();
377	scanned = true;
378	}
379
380	ret = rmobile_add_pm_domains(base, pmd, NULL);
381	of_node_put(pmd);
382	if (ret) {
383	of_node_put(np);
384	break;
385	}
386	}
387
388	put_special_pds();
389
390	return ret;
391	}
392
393	core_initcall(rmobile_init_pm_domains);
394
395	#endif /* !CONFIG_ARCH_SHMOBILE_LEGACY */