Add a power domain framework/uclass

Many SoCs allow power to be applied to or removed from portions of the SoC
(power domains). This may be used to save power. This API provides the
means to control such power management hardware.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Simon Glass <sjg@chromium.org>

1 files changed, 55 insertions, 0 deletions

diff --git a/drivers/power/domain/sandbox-power-domain-test.c b/drivers/power/domain/sandbox-power-domain-test.c
new file mode 100644
index 0000000000..92a3a2a527
--- /dev/null
+++ b/drivers/power/domain/sandbox-power-domain-test.c
@@ -0,0 +1,55 @@
+/*
+ * Copyright (c) 2016, NVIDIA CORPORATION.
+ *
+ * SPDX-License-Identifier: GPL-2.0
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <power-domain.h>
+#include <asm/io.h>
+#include <asm/power-domain.h>
+
+struct sandbox_power_domain_test {
+	struct power_domain pd;
+};
+
+int sandbox_power_domain_test_get(struct udevice *dev)
+{
+	struct sandbox_power_domain_test *sbrt = dev_get_priv(dev);
+
+	return power_domain_get(dev, &sbrt->pd);
+}
+
+int sandbox_power_domain_test_on(struct udevice *dev)
+{
+	struct sandbox_power_domain_test *sbrt = dev_get_priv(dev);
+
+	return power_domain_on(&sbrt->pd);
+}
+
+int sandbox_power_domain_test_off(struct udevice *dev)
+{
+	struct sandbox_power_domain_test *sbrt = dev_get_priv(dev);
+
+	return power_domain_off(&sbrt->pd);
+}
+
+int sandbox_power_domain_test_free(struct udevice *dev)
+{
+	struct sandbox_power_domain_test *sbrt = dev_get_priv(dev);
+
+	return power_domain_free(&sbrt->pd);
+}
+
+static const struct udevice_id sandbox_power_domain_test_ids[] = {
+	{ .compatible = "sandbox,power-domain-test" },
+	{ }
+};
+
+U_BOOT_DRIVER(sandbox_power_domain_test) = {
+	.name = "sandbox_power_domain_test",
+	.id = UCLASS_MISC,
+	.of_match = sandbox_power_domain_test_ids,
+	.priv_auto_alloc_size = sizeof(struct sandbox_power_domain_test),
+};