1 files changed, 3 insertions, 377 deletions

diff --git a/drivers/soc/renesas/r8a779a0-sysc.c b/drivers/soc/renesas/r8a779a0-sysc.c
index 7410b9fa9846..fdfc857df334 100644
--- a/drivers/soc/renesas/r8a779a0-sysc.c
+++ b/drivers/soc/renesas/r8a779a0-sysc.c
@@ -21,35 +21,9 @@
 
 #include <dt-bindings/power/r8a779a0-sysc.h>
 
-/*
- * Power Domain flags
- */
-#define PD_CPU		BIT(0)	/* Area contains main CPU core */
-#define PD_SCU		BIT(1)	/* Area contains SCU and L2 cache */
-#define PD_NO_CR	BIT(2)	/* Area lacks PWR{ON,OFF}CR registers */
-
-#define PD_CPU_NOCR	PD_CPU | PD_NO_CR /* CPU area lacks CR */
-#define PD_ALWAYS_ON	PD_NO_CR	  /* Always-on area */
-
-/*
- * Description of a Power Area
- */
-struct r8a779a0_sysc_area {
-	const char *name;
-	u8 pdr;			/* PDRn */
-	int parent;		/* -1 if none */
-	unsigned int flags;	/* See PD_* */
-};
-
-/*
- * SoC-specific Power Area Description
- */
-struct r8a779a0_sysc_info {
-	const struct r8a779a0_sysc_area *areas;
-	unsigned int num_areas;
-};
+#include "rcar-gen4-sysc.h"
 
-static struct r8a779a0_sysc_area r8a779a0_areas[] __initdata = {
+static struct rcar_gen4_sysc_area r8a779a0_areas[] __initdata = {
 	{ "always-on",	R8A779A0_PD_ALWAYS_ON, -1, PD_ALWAYS_ON },
 	{ "a3e0",	R8A779A0_PD_A3E0, R8A779A0_PD_ALWAYS_ON, PD_SCU },
 	{ "a3e1",	R8A779A0_PD_A3E1, R8A779A0_PD_ALWAYS_ON, PD_SCU },
@@ -96,355 +70,7 @@ static struct r8a779a0_sysc_area r8a779a0_areas[] __initdata = {
 	{ "a1dsp1",	R8A779A0_PD_A1DSP1, R8A779A0_PD_A2CN1 },
 };
 
-static const struct r8a779a0_sysc_info r8a779a0_sysc_info __initconst = {
+const struct rcar_gen4_sysc_info r8a779a0_sysc_info __initconst = {
 	.areas = r8a779a0_areas,
 	.num_areas = ARRAY_SIZE(r8a779a0_areas),
 };
-
-/* SYSC Common */
-#define SYSCSR		0x000	/* SYSC Status Register */
-#define SYSCPONSR(x)	(0x800 + ((x) * 0x4)) /* Power-ON Status Register 0 */
-#define SYSCPOFFSR(x)	(0x808 + ((x) * 0x4)) /* Power-OFF Status Register */
-#define SYSCISCR(x)	(0x810 + ((x) * 0x4)) /* Interrupt Status/Clear Register */
-#define SYSCIER(x)	(0x820 + ((x) * 0x4)) /* Interrupt Enable Register */
-#define SYSCIMR(x)	(0x830 + ((x) * 0x4)) /* Interrupt Mask Register */
-
-/* Power Domain Registers */
-#define PDRSR(n)	(0x1000 + ((n) * 0x40))
-#define PDRONCR(n)	(0x1004 + ((n) * 0x40))
-#define PDROFFCR(n)	(0x1008 + ((n) * 0x40))
-#define PDRESR(n)	(0x100C + ((n) * 0x40))
-
-/* PWRON/PWROFF */
-#define PWRON_PWROFF		BIT(0)	/* Power-ON/OFF request */
-
-/* PDRESR */
-#define PDRESR_ERR		BIT(0)
-
-/* PDRSR */
-#define PDRSR_OFF		BIT(0)	/* Power-OFF state */
-#define PDRSR_ON		BIT(4)	/* Power-ON state */
-#define PDRSR_OFF_STATE		BIT(8)  /* Processing Power-OFF sequence */
-#define PDRSR_ON_STATE		BIT(12) /* Processing Power-ON sequence */
-
-#define SYSCSR_BUSY		GENMASK(1, 0)	/* All bit sets is not busy */
-
-#define SYSCSR_TIMEOUT		10000
-#define SYSCSR_DELAY_US		10
-
-#define PDRESR_RETRIES		1000
-#define PDRESR_DELAY_US		10
-
-#define SYSCISR_TIMEOUT		10000
-#define SYSCISR_DELAY_US	10
-
-#define NUM_DOMAINS_EACH_REG	BITS_PER_TYPE(u32)
-
-static void __iomem *r8a779a0_sysc_base;
-static DEFINE_SPINLOCK(r8a779a0_sysc_lock); /* SMP CPUs + I/O devices */
-
-static int r8a779a0_sysc_pwr_on_off(u8 pdr, bool on)
-{
-	unsigned int reg_offs;
-	u32 val;
-	int ret;
-
-	if (on)
-		reg_offs = PDRONCR(pdr);
-	else
-		reg_offs = PDROFFCR(pdr);
-
-	/* Wait until SYSC is ready to accept a power request */
-	ret = readl_poll_timeout_atomic(r8a779a0_sysc_base + SYSCSR, val,
-					(val & SYSCSR_BUSY) == SYSCSR_BUSY,
-					SYSCSR_DELAY_US, SYSCSR_TIMEOUT);
-	if (ret < 0)
-		return -EAGAIN;
-
-	/* Submit power shutoff or power resume request */
-	iowrite32(PWRON_PWROFF, r8a779a0_sysc_base + reg_offs);
-
-	return 0;
-}
-
-static int clear_irq_flags(unsigned int reg_idx, unsigned int isr_mask)
-{
-	u32 val;
-	int ret;
-
-	iowrite32(isr_mask, r8a779a0_sysc_base + SYSCISCR(reg_idx));
-
-	ret = readl_poll_timeout_atomic(r8a779a0_sysc_base + SYSCISCR(reg_idx),
-					val, !(val & isr_mask),
-					SYSCISR_DELAY_US, SYSCISR_TIMEOUT);
-	if (ret < 0) {
-		pr_err("\n %s : Can not clear IRQ flags in SYSCISCR", __func__);
-		return -EIO;
-	}
-
-	return 0;
-}
-
-static int r8a779a0_sysc_power(u8 pdr, bool on)
-{
-	unsigned int isr_mask;
-	unsigned int reg_idx, bit_idx;
-	unsigned int status;
-	unsigned long flags;
-	int ret = 0;
-	u32 val;
-	int k;
-
-	spin_lock_irqsave(&r8a779a0_sysc_lock, flags);
-
-	reg_idx = pdr / NUM_DOMAINS_EACH_REG;
-	bit_idx = pdr % NUM_DOMAINS_EACH_REG;
-
-	isr_mask = BIT(bit_idx);
-
-	/*
-	 * The interrupt source needs to be enabled, but masked, to prevent the
-	 * CPU from receiving it.
-	 */
-	iowrite32(ioread32(r8a779a0_sysc_base + SYSCIER(reg_idx)) | isr_mask,
-		  r8a779a0_sysc_base + SYSCIER(reg_idx));
-	iowrite32(ioread32(r8a779a0_sysc_base + SYSCIMR(reg_idx)) | isr_mask,
-		  r8a779a0_sysc_base + SYSCIMR(reg_idx));
-
-	ret = clear_irq_flags(reg_idx, isr_mask);
-	if (ret)
-		goto out;
-
-	/* Submit power shutoff or resume request until it was accepted */
-	for (k = 0; k < PDRESR_RETRIES; k++) {
-		ret = r8a779a0_sysc_pwr_on_off(pdr, on);
-		if (ret)
-			goto out;
-
-		status = ioread32(r8a779a0_sysc_base + PDRESR(pdr));
-		if (!(status & PDRESR_ERR))
-			break;
-
-		udelay(PDRESR_DELAY_US);
-	}
-
-	if (k == PDRESR_RETRIES) {
-		ret = -EIO;
-		goto out;
-	}
-
-	/* Wait until the power shutoff or resume request has completed * */
-	ret = readl_poll_timeout_atomic(r8a779a0_sysc_base + SYSCISCR(reg_idx),
-					val, (val & isr_mask),
-					SYSCISR_DELAY_US, SYSCISR_TIMEOUT);
-	if (ret < 0) {
-		ret = -EIO;
-		goto out;
-	}
-
-	/* Clear interrupt flags */
-	ret = clear_irq_flags(reg_idx, isr_mask);
-	if (ret)
-		goto out;
-
- out:
-	spin_unlock_irqrestore(&r8a779a0_sysc_lock, flags);
-
-	pr_debug("sysc power %s domain %d: %08x -> %d\n", on ? "on" : "off",
-		 pdr, ioread32(r8a779a0_sysc_base + SYSCISCR(reg_idx)), ret);
-	return ret;
-}
-
-static bool r8a779a0_sysc_power_is_off(u8 pdr)
-{
-	unsigned int st;
-
-	st = ioread32(r8a779a0_sysc_base + PDRSR(pdr));
-
-	if (st & PDRSR_OFF)
-		return true;
-
-	return false;
-}
-
-struct r8a779a0_sysc_pd {
-	struct generic_pm_domain genpd;
-	u8 pdr;
-	unsigned int flags;
-	char name[];
-};
-
-static inline struct r8a779a0_sysc_pd *to_r8a779a0_pd(struct generic_pm_domain *d)
-{
-	return container_of(d, struct r8a779a0_sysc_pd, genpd);
-}
-
-static int r8a779a0_sysc_pd_power_off(struct generic_pm_domain *genpd)
-{
-	struct r8a779a0_sysc_pd *pd = to_r8a779a0_pd(genpd);
-
-	pr_debug("%s: %s\n", __func__, genpd->name);
-	return r8a779a0_sysc_power(pd->pdr, false);
-}
-
-static int r8a779a0_sysc_pd_power_on(struct generic_pm_domain *genpd)
-{
-	struct r8a779a0_sysc_pd *pd = to_r8a779a0_pd(genpd);
-
-	pr_debug("%s: %s\n", __func__, genpd->name);
-	return r8a779a0_sysc_power(pd->pdr, true);
-}
-
-static int __init r8a779a0_sysc_pd_setup(struct r8a779a0_sysc_pd *pd)
-{
-	struct generic_pm_domain *genpd = &pd->genpd;
-	const char *name = pd->genpd.name;
-	int error;
-
-	if (pd->flags & PD_CPU) {
-		/*
-		 * This domain contains a CPU core and therefore it should
-		 * only be turned off if the CPU is not in use.
-		 */
-		pr_debug("PM domain %s contains %s\n", name, "CPU");
-		genpd->flags |= GENPD_FLAG_ALWAYS_ON;
-	} else if (pd->flags & PD_SCU) {
-		/*
-		 * This domain contains an SCU and cache-controller, and
-		 * therefore it should only be turned off if the CPU cores are
-		 * not in use.
-		 */
-		pr_debug("PM domain %s contains %s\n", name, "SCU");
-		genpd->flags |= GENPD_FLAG_ALWAYS_ON;
-	} else if (pd->flags & PD_NO_CR) {
-		/*
-		 * This domain cannot be turned off.
-		 */
-		genpd->flags |= GENPD_FLAG_ALWAYS_ON;
-	}
-
-	if (!(pd->flags & (PD_CPU | PD_SCU))) {
-		/* Enable Clock Domain for I/O devices */
-		genpd->flags |= GENPD_FLAG_PM_CLK | GENPD_FLAG_ACTIVE_WAKEUP;
-		genpd->attach_dev = cpg_mssr_attach_dev;
-		genpd->detach_dev = cpg_mssr_detach_dev;
-	}
-
-	genpd->power_off = r8a779a0_sysc_pd_power_off;
-	genpd->power_on = r8a779a0_sysc_pd_power_on;
-
-	if (pd->flags & (PD_CPU | PD_NO_CR)) {
-		/* Skip CPUs (handled by SMP code) and areas without control */
-		pr_debug("%s: Not touching %s\n", __func__, genpd->name);
-		goto finalize;
-	}
-
-	if (!r8a779a0_sysc_power_is_off(pd->pdr)) {
-		pr_debug("%s: %s is already powered\n", __func__, genpd->name);
-		goto finalize;
-	}
-
-	r8a779a0_sysc_power(pd->pdr, true);
-
-finalize:
-	error = pm_genpd_init(genpd, &simple_qos_governor, false);
-	if (error)
-		pr_err("Failed to init PM domain %s: %d\n", name, error);
-
-	return error;
-}
-
-static const struct of_device_id r8a779a0_sysc_matches[] __initconst = {
-	{ .compatible = "renesas,r8a779a0-sysc", .data = &r8a779a0_sysc_info },
-	{ /* sentinel */ }
-};
-
-struct r8a779a0_pm_domains {
-	struct genpd_onecell_data onecell_data;
-	struct generic_pm_domain *domains[R8A779A0_PD_ALWAYS_ON + 1];
-};
-
-static struct genpd_onecell_data *r8a779a0_sysc_onecell_data;
-
-static int __init r8a779a0_sysc_pd_init(void)
-{
-	const struct r8a779a0_sysc_info *info;
-	const struct of_device_id *match;
-	struct r8a779a0_pm_domains *domains;
-	struct device_node *np;
-	void __iomem *base;
-	unsigned int i;
-	int error;
-
-	np = of_find_matching_node_and_match(NULL, r8a779a0_sysc_matches, &match);
-	if (!np)
-		return -ENODEV;
-
-	info = match->data;
-
-	base = of_iomap(np, 0);
-	if (!base) {
-		pr_warn("%pOF: Cannot map regs\n", np);
-		error = -ENOMEM;
-		goto out_put;
-	}
-
-	r8a779a0_sysc_base = base;
-
-	domains = kzalloc(sizeof(*domains), GFP_KERNEL);
-	if (!domains) {
-		error = -ENOMEM;
-		goto out_put;
-	}
-
-	domains->onecell_data.domains = domains->domains;
-	domains->onecell_data.num_domains = ARRAY_SIZE(domains->domains);
-	r8a779a0_sysc_onecell_data = &domains->onecell_data;
-
-	for (i = 0; i < info->num_areas; i++) {
-		const struct r8a779a0_sysc_area *area = &info->areas[i];
-		struct r8a779a0_sysc_pd *pd;
-		size_t n;
-
-		if (!area->name) {
-			/* Skip NULLified area */
-			continue;
-		}
-
-		n = strlen(area->name) + 1;
-		pd = kzalloc(sizeof(*pd) + n, GFP_KERNEL);
-		if (!pd) {
-			error = -ENOMEM;
-			goto out_put;
-		}
-
-		memcpy(pd->name, area->name, n);
-		pd->genpd.name = pd->name;
-		pd->pdr = area->pdr;
-		pd->flags = area->flags;
-
-		error = r8a779a0_sysc_pd_setup(pd);
-		if (error)
-			goto out_put;
-
-		domains->domains[area->pdr] = &pd->genpd;
-
-		if (area->parent < 0)
-			continue;
-
-		error = pm_genpd_add_subdomain(domains->domains[area->parent],
-					       &pd->genpd);
-		if (error) {
-			pr_warn("Failed to add PM subdomain %s to parent %u\n",
-				area->name, area->parent);
-			goto out_put;
-		}
-	}
-
-	error = of_genpd_add_provider_onecell(np, &domains->onecell_data);
-
-out_put:
-	of_node_put(np);
-	return error;
-}
-early_initcall(r8a779a0_sysc_pd_init);