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@@ -0,0 +1,167 @@
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+/*
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+ * rmobile power management support
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+ *
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+ * Copyright (C) 2012 Renesas Solutions Corp.
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+ * Copyright (C) 2012 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
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+ *
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+ * based on pm-sh7372.c
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+ * Copyright (C) 2011 Magnus Damm
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+ *
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+ * This file is subject to the terms and conditions of the GNU General Public
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+ * License. See the file "COPYING" in the main directory of this archive
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+ * for more details.
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+ */
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+#include <linux/console.h>
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+#include <linux/delay.h>
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+#include <linux/platform_device.h>
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+#include <linux/pm.h>
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+#include <linux/pm_clock.h>
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+#include <asm/io.h>
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+#include <mach/pm-rmobile.h>
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+
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+/* SYSC */
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+#define SPDCR 0xe6180008
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+#define SWUCR 0xe6180014
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+#define PSTR 0xe6180080
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+
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+#define PSTR_RETRIES 100
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+#define PSTR_DELAY_US 10
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+
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+#ifdef CONFIG_PM
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+static int rmobile_pd_power_down(struct generic_pm_domain *genpd)
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+{
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+ struct rmobile_pm_domain *rmobile_pd = to_rmobile_pd(genpd);
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+ unsigned int mask = 1 << rmobile_pd->bit_shift;
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+
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+ if (rmobile_pd->suspend) {
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+ int ret = rmobile_pd->suspend();
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+
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+ if (ret)
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+ return ret;
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+ }
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+
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+ if (__raw_readl(PSTR) & mask) {
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+ unsigned int retry_count;
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+ __raw_writel(mask, SPDCR);
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+
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+ for (retry_count = PSTR_RETRIES; retry_count; retry_count--) {
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+ if (!(__raw_readl(SPDCR) & mask))
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+ break;
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+ cpu_relax();
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+ }
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+ }
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+
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+ if (!rmobile_pd->no_debug)
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+ pr_debug("%s: Power off, 0x%08x -> PSTR = 0x%08x\n",
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+ genpd->name, mask, __raw_readl(PSTR));
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+
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+ return 0;
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+}
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+
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+static int __rmobile_pd_power_up(struct rmobile_pm_domain *rmobile_pd,
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+ bool do_resume)
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+{
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+ unsigned int mask = 1 << rmobile_pd->bit_shift;
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+ unsigned int retry_count;
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+ int ret = 0;
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+
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+ if (__raw_readl(PSTR) & mask)
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+ goto out;
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+
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+ __raw_writel(mask, SWUCR);
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+
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+ for (retry_count = 2 * PSTR_RETRIES; retry_count; retry_count--) {
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+ if (!(__raw_readl(SWUCR) & mask))
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+ break;
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+ if (retry_count > PSTR_RETRIES)
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+ udelay(PSTR_DELAY_US);
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+ else
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+ cpu_relax();
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+ }
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+ if (!retry_count)
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+ ret = -EIO;
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+
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+ if (!rmobile_pd->no_debug)
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+ pr_debug("%s: Power on, 0x%08x -> PSTR = 0x%08x\n",
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+ rmobile_pd->genpd.name, mask, __raw_readl(PSTR));
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+
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+out:
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+ if (ret == 0 && rmobile_pd->resume && do_resume)
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+ rmobile_pd->resume();
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+
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+ return ret;
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+}
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+
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+static int rmobile_pd_power_up(struct generic_pm_domain *genpd)
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+{
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+ return __rmobile_pd_power_up(to_rmobile_pd(genpd), true);
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+}
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+
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+static bool rmobile_pd_active_wakeup(struct device *dev)
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+{
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+ bool (*active_wakeup)(struct device *dev);
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+
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+ active_wakeup = dev_gpd_data(dev)->ops.active_wakeup;
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+ return active_wakeup ? active_wakeup(dev) : true;
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+}
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+
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+static int rmobile_pd_stop_dev(struct device *dev)
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+{
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+ int (*stop)(struct device *dev);
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+
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+ stop = dev_gpd_data(dev)->ops.stop;
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+ if (stop) {
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+ int ret = stop(dev);
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+ if (ret)
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+ return ret;
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+ }
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+ return pm_clk_suspend(dev);
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+}
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+
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+static int rmobile_pd_start_dev(struct device *dev)
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+{
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+ int (*start)(struct device *dev);
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+ int ret;
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+
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+ ret = pm_clk_resume(dev);
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+ if (ret)
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+ return ret;
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+
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+ start = dev_gpd_data(dev)->ops.start;
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+ if (start)
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+ ret = start(dev);
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+
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+ return ret;
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+}
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+
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+void rmobile_init_pm_domain(struct rmobile_pm_domain *rmobile_pd)
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+{
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+ struct generic_pm_domain *genpd = &rmobile_pd->genpd;
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+ struct dev_power_governor *gov = rmobile_pd->gov;
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+
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+ pm_genpd_init(genpd, gov ? : &simple_qos_governor, false);
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+ genpd->dev_ops.stop = rmobile_pd_stop_dev;
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+ genpd->dev_ops.start = rmobile_pd_start_dev;
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+ genpd->dev_ops.active_wakeup = rmobile_pd_active_wakeup;
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+ genpd->dev_irq_safe = true;
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+ genpd->power_off = rmobile_pd_power_down;
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+ genpd->power_on = rmobile_pd_power_up;
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+ __rmobile_pd_power_up(rmobile_pd, false);
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+}
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+
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+void rmobile_add_device_to_domain(struct rmobile_pm_domain *rmobile_pd,
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+ struct platform_device *pdev)
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+{
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+ struct device *dev = &pdev->dev;
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+
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+ pm_genpd_add_device(&rmobile_pd->genpd, dev);
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+ if (pm_clk_no_clocks(dev))
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+ pm_clk_add(dev, NULL);
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+}
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+
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+void rmobile_pm_add_subdomain(struct rmobile_pm_domain *rmobile_pd,
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+ struct rmobile_pm_domain *rmobile_sd)
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+{
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+ pm_genpd_add_subdomain(&rmobile_pd->genpd, &rmobile_sd->genpd);
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+}
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+#endif /* CONFIG_PM */
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Rafael J. Wysocki