ARM: shmobile: R-Mobile: Move pm-rmobile to drivers/soc/renesas/

The pm-rmobile driver is really a driver for the System Controller
(SYSC) found in R-Mobile SoCs.  An equivalent driver for R-Car SoCs is
already located under drivers/soc/renesas/.

Hence move the pm-rmobile driver from arch/arm/mach-shmobile/ to
drivers/soc/renesas/, and rename it to rmobile-sysc.

Enable compile-testing on non-ARM and non-R-Mobile SoCs.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

3 files changed, 0 insertions, 358 deletions

diff --git a/arch/arm/mach-shmobile/Kconfig b/arch/arm/mach-shmobile/Kconfig
index 9b798c9dffe4..3683d6f10973 100644
--- a/arch/arm/mach-shmobile/Kconfig
+++ b/arch/arm/mach-shmobile/Kconfig
@@ -1,9 +1,4 @@
 # SPDX-License-Identifier: GPL-2.0
-config PM_RMOBILE
-	bool
-	select PM
-	select PM_GENERIC_DOMAINS
-
 menuconfig ARCH_RENESAS
 	bool "Renesas ARM SoCs"
 	depends on ARCH_MULTI_V7 && MMU
diff --git a/arch/arm/mach-shmobile/Makefile b/arch/arm/mach-shmobile/Makefile
index 5591646cb9bb..f7bf17b7abae 100644
--- a/arch/arm/mach-shmobile/Makefile
+++ b/arch/arm/mach-shmobile/Makefile
@@ -35,7 +35,6 @@ smp-$(CONFIG_ARCH_EMEV2)	+= smp-emev2.o headsmp-scu.o platsmp-scu.o
 
 # PM objects
 obj-$(CONFIG_SUSPEND)		+= suspend.o
-obj-$(CONFIG_PM_RMOBILE)	+= pm-rmobile.o
 obj-$(CONFIG_ARCH_RCAR_GEN2)	+= pm-rcar-gen2.o
 
 # Framework support
diff --git a/arch/arm/mach-shmobile/pm-rmobile.c b/arch/arm/mach-shmobile/pm-rmobile.c
deleted file mode 100644
index 421ae1c887d8..000000000000
--- a/arch/arm/mach-shmobile/pm-rmobile.c
+++ /dev/null
@@ -1,352 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * 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
- */
-#include <linux/clk/renesas.h>
-#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/pm_domain.h>
-#include <linux/slab.h>
-
-#include <asm/io.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
-
-struct rmobile_pm_domain {
-	struct generic_pm_domain genpd;
-	struct dev_power_governor *gov;
-	int (*suspend)(void);
-	void __iomem *base;
-	unsigned int bit_shift;
-};
-
-static inline
-struct rmobile_pm_domain *to_rmobile_pd(struct generic_pm_domain *d)
-{
-	return container_of(d, struct rmobile_pm_domain, genpd);
-}
-
-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 = BIT(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();
-		}
-	}
-
-	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)
-{
-	unsigned int mask;
-	unsigned int retry_count;
-	int ret = 0;
-
-	if (rmobile_pd->bit_shift == ~0)
-		return 0;
-
-	mask = BIT(rmobile_pd->bit_shift);
-	if (__raw_readl(rmobile_pd->base + PSTR) & mask)
-		return ret;
-
-	__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;
-
-	pr_debug("%s: Power on, 0x%08x -> PSTR = 0x%08x\n",
-		 rmobile_pd->genpd.name, mask,
-		 __raw_readl(rmobile_pd->base + PSTR));
-
-	return ret;
-}
-
-static int rmobile_pd_power_up(struct generic_pm_domain *genpd)
-{
-	return __rmobile_pd_power_up(to_rmobile_pd(genpd));
-}
-
-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 | GENPD_FLAG_ACTIVE_WAKEUP;
-	genpd->power_off		= rmobile_pd_power_down;
-	genpd->power_on			= rmobile_pd_power_up;
-	genpd->attach_dev		= cpg_mstp_attach_dev;
-	genpd->detach_dev		= cpg_mstp_detach_dev;
-	__rmobile_pd_power_up(rmobile_pd);
-	pm_genpd_init(genpd, gov ? : &simple_qos_governor, false);
-}
-
-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;
-}
-
-enum pd_types {
-	PD_NORMAL,
-	PD_CPU,
-	PD_CONSOLE,
-	PD_DEBUG,
-	PD_MEMCTL,
-};
-
-#define MAX_NUM_SPECIAL_PDS	16
-
-static struct special_pd {
-	struct device_node *pd;
-	enum pd_types type;
-} special_pds[MAX_NUM_SPECIAL_PDS] __initdata;
-
-static unsigned int num_special_pds __initdata;
-
-static const struct of_device_id special_ids[] __initconst = {
-	{ .compatible = "arm,coresight-etm3x", .data = (void *)PD_DEBUG },
-	{ .compatible = "renesas,dbsc-r8a73a4", .data = (void *)PD_MEMCTL, },
-	{ .compatible = "renesas,dbsc3-r8a7740", .data = (void *)PD_MEMCTL, },
-	{ .compatible = "renesas,sbsc-sh73a0", .data = (void *)PD_MEMCTL, },
-	{ /* sentinel */ },
-};
-
-static void __init add_special_pd(struct device_node *np, enum pd_types type)
-{
-	unsigned int i;
-	struct device_node *pd;
-
-	pd = of_parse_phandle(np, "power-domains", 0);
-	if (!pd)
-		return;
-
-	for (i = 0; i < num_special_pds; i++)
-		if (pd == special_pds[i].pd && type == special_pds[i].type) {
-			of_node_put(pd);
-			return;
-		}
-
-	if (num_special_pds == ARRAY_SIZE(special_pds)) {
-		pr_warn("Too many special PM domains\n");
-		of_node_put(pd);
-		return;
-	}
-
-	pr_debug("Special PM domain %pOFn type %d for %pOF\n", pd, type, np);
-
-	special_pds[num_special_pds].pd = pd;
-	special_pds[num_special_pds].type = type;
-	num_special_pds++;
-}
-
-static void __init get_special_pds(void)
-{
-	struct device_node *np;
-	const struct of_device_id *id;
-
-	/* PM domains containing CPUs */
-	for_each_of_cpu_node(np)
-		add_special_pd(np, PD_CPU);
-
-	/* PM domain containing console */
-	if (of_stdout)
-		add_special_pd(of_stdout, PD_CONSOLE);
-
-	/* PM domains containing other special devices */
-	for_each_matching_node_and_match(np, special_ids, &id)
-		add_special_pd(np, (enum pd_types)id->data);
-}
-
-static void __init put_special_pds(void)
-{
-	unsigned int i;
-
-	for (i = 0; i < num_special_pds; i++)
-		of_node_put(special_pds[i].pd);
-}
-
-static enum pd_types __init pd_type(const struct device_node *pd)
-{
-	unsigned int i;
-
-	for (i = 0; i < num_special_pds; i++)
-		if (pd == special_pds[i].pd)
-			return special_pds[i].type;
-
-	return PD_NORMAL;
-}
-
-static void __init rmobile_setup_pm_domain(struct device_node *np,
-					   struct rmobile_pm_domain *pd)
-{
-	const char *name = pd->genpd.name;
-
-	switch (pd_type(np)) {
-	case PD_CPU:
-		/*
-		 * This domain contains the CPU core and therefore it should
-		 * only be turned off if the CPU is not in use.
-		 */
-		pr_debug("PM domain %s contains CPU\n", name);
-		pd->genpd.flags |= GENPD_FLAG_ALWAYS_ON;
-		break;
-
-	case PD_CONSOLE:
-		pr_debug("PM domain %s contains serial console\n", name);
-		pd->gov = &pm_domain_always_on_gov;
-		pd->suspend = rmobile_pd_suspend_console;
-		break;
-
-	case PD_DEBUG:
-		/*
-		 * This domain contains the Coresight-ETM hardware block and
-		 * therefore it should only be turned off if the debug module
-		 * is not in use.
-		 */
-		pr_debug("PM domain %s contains Coresight-ETM\n", name);
-		pd->genpd.flags |= GENPD_FLAG_ALWAYS_ON;
-		break;
-
-	case PD_MEMCTL:
-		/*
-		 * This domain contains a memory-controller and therefore it
-		 * should only be turned off if memory is not in use.
-		 */
-		pr_debug("PM domain %s contains MEMCTL\n", name);
-		pd->genpd.flags |= GENPD_FLAG_ALWAYS_ON;
-		break;
-
-	case PD_NORMAL:
-		break;
-	}
-
-	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) {
-			of_node_put(np);
-			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("%pOF cannot map reg 0\n", np);
-			continue;
-		}
-
-		pmd = of_get_child_by_name(np, "pm-domains");
-		if (!pmd) {
-			pr_warn("%pOF lacks pm-domains node\n", np);
-			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);