1 files changed, 147 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/pm.c b/arch/arm/mach-omap2/pm.c
new file mode 100644
index 00000000000..59ca03b0e69
--- /dev/null
+++ b/arch/arm/mach-omap2/pm.c
@@ -0,0 +1,147 @@
+/*
+ * pm.c - Common OMAP2+ power management-related code
+ *
+ * Copyright (C) 2010 Texas Instruments, Inc.
+ * Copyright (C) 2010 Nokia Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/err.h>
+
+#include <plat/omap-pm.h>
+#include <plat/omap_device.h>
+#include <plat/common.h>
+
+#include <plat/powerdomain.h>
+#include <plat/clockdomain.h>
+
+static struct omap_device_pm_latency *pm_lats;
+
+static struct device *mpu_dev;
+static struct device *iva_dev;
+static struct device *l3_dev;
+static struct device *dsp_dev;
+
+struct device *omap2_get_mpuss_device(void)
+{
+	WARN_ON_ONCE(!mpu_dev);
+	return mpu_dev;
+}
+
+struct device *omap2_get_iva_device(void)
+{
+	WARN_ON_ONCE(!iva_dev);
+	return iva_dev;
+}
+
+struct device *omap2_get_l3_device(void)
+{
+	WARN_ON_ONCE(!l3_dev);
+	return l3_dev;
+}
+
+struct device *omap4_get_dsp_device(void)
+{
+	WARN_ON_ONCE(!dsp_dev);
+	return dsp_dev;
+}
+EXPORT_SYMBOL(omap4_get_dsp_device);
+
+/* static int _init_omap_device(struct omap_hwmod *oh, void *user) */
+static int _init_omap_device(char *name, struct device **new_dev)
+{
+	struct omap_hwmod *oh;
+	struct omap_device *od;
+
+	oh = omap_hwmod_lookup(name);
+	if (WARN(!oh, "%s: could not find omap_hwmod for %s\n",
+		 __func__, name))
+		return -ENODEV;
+
+	od = omap_device_build(oh->name, 0, oh, NULL, 0, pm_lats, 0, false);
+	if (WARN(IS_ERR(od), "%s: could not build omap_device for %s\n",
+		 __func__, name))
+		return -ENODEV;
+
+	*new_dev = &od->pdev.dev;
+
+	return 0;
+}
+
+/*
+ * Build omap_devices for processors and bus.
+ */
+static void omap2_init_processor_devices(void)
+{
+	_init_omap_device("mpu", &mpu_dev);
+	_init_omap_device("iva", &iva_dev);
+	if (cpu_is_omap44xx()) {
+		_init_omap_device("l3_main_1", &l3_dev);
+		_init_omap_device("dsp", &dsp_dev);
+	} else {
+		_init_omap_device("l3_main", &l3_dev);
+	}
+}
+
+/*
+ * This sets pwrdm state (other than mpu & core. Currently only ON &
+ * RET are supported. Function is assuming that clkdm doesn't have
+ * hw_sup mode enabled.
+ */
+int omap_set_pwrdm_state(struct powerdomain *pwrdm, u32 state)
+{
+	u32 cur_state;
+	int sleep_switch = 0;
+	int ret = 0;
+
+	if (pwrdm == NULL || IS_ERR(pwrdm))
+		return -EINVAL;
+
+	while (!(pwrdm->pwrsts & (1 << state))) {
+		if (state == PWRDM_POWER_OFF)
+			return ret;
+		state--;
+	}
+
+	cur_state = pwrdm_read_next_pwrst(pwrdm);
+	if (cur_state == state)
+		return ret;
+
+	if (pwrdm_read_pwrst(pwrdm) < PWRDM_POWER_ON) {
+		omap2_clkdm_wakeup(pwrdm->pwrdm_clkdms[0]);
+		sleep_switch = 1;
+		pwrdm_wait_transition(pwrdm);
+	}
+
+	ret = pwrdm_set_next_pwrst(pwrdm, state);
+	if (ret) {
+		printk(KERN_ERR "Unable to set state of powerdomain: %s\n",
+		       pwrdm->name);
+		goto err;
+	}
+
+	if (sleep_switch) {
+		omap2_clkdm_allow_idle(pwrdm->pwrdm_clkdms[0]);
+		pwrdm_wait_transition(pwrdm);
+		pwrdm_state_switch(pwrdm);
+	}
+
+err:
+	return ret;
+}
+
+static int __init omap2_common_pm_init(void)
+{
+	omap2_init_processor_devices();
+	omap_pm_if_init();
+
+	return 0;
+}
+device_initcall(omap2_common_pm_init);
+