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-rw-r--r--arch/arm/mach-shmobile/pm-rmobile.c353
1 files changed, 0 insertions, 353 deletions
diff --git a/arch/arm/mach-shmobile/pm-rmobile.c b/arch/arm/mach-shmobile/pm-rmobile.c
deleted file mode 100644
index c6a11b5ec6db..000000000000
--- a/arch/arm/mach-shmobile/pm-rmobile.c
+++ /dev/null
@@ -1,353 +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/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 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();
- }
- }
-
- 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 = BIT(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 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, false);
- 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);