GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

source/bootloader/u-boot-2020.01/drivers/power/domain/bcm6328-power-domain.c

@@ -0,0 +1,78 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2017 Álvaro Fernández Rojas <noltari@gmail.com>
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <power-domain-uclass.h>
+#include <asm/io.h>
+
+#define MAX_DOMAINS	32
+
+struct bcm6328_power_domain {
+	void __iomem *regs;
+};
+
+static int bcm6328_power_domain_request(struct power_domain *power_domain)
+{
+	if (power_domain->id >= MAX_DOMAINS)
+		return -EINVAL;
+
+	return 0;
+}
+
+static int bcm6328_power_domain_free(struct power_domain *power_domain)
+{
+	return 0;
+}
+
+static int bcm6328_power_domain_on(struct power_domain *power_domain)
+{
+	struct bcm6328_power_domain *priv = dev_get_priv(power_domain->dev);
+
+	clrbits_be32(priv->regs, BIT(power_domain->id));
+
+	return 0;
+}
+
+static int bcm6328_power_domain_off(struct power_domain *power_domain)
+{
+	struct bcm6328_power_domain *priv = dev_get_priv(power_domain->dev);
+
+	setbits_be32(priv->regs, BIT(power_domain->id));
+
+	return 0;
+}
+
+static int bcm6328_power_domain_probe(struct udevice *dev)
+{
+	struct bcm6328_power_domain *priv = dev_get_priv(dev);
+
+	priv->regs = dev_remap_addr(dev);
+	if (!priv->regs)
+		return -EINVAL;
+
+	return 0;
+}
+
+static const struct udevice_id bcm6328_power_domain_ids[] = {
+	{ .compatible = "brcm,bcm6328-power-domain" },
+	{ /* sentinel */ }
+};
+
+struct power_domain_ops bcm6328_power_domain_ops = {
+	.free = bcm6328_power_domain_free,
+	.off = bcm6328_power_domain_off,
+	.on = bcm6328_power_domain_on,
+	.request = bcm6328_power_domain_request,
+};
+
+U_BOOT_DRIVER(bcm6328_power_domain) = {
+	.name = "bcm6328_power_domain",
+	.id = UCLASS_POWER_DOMAIN,
+	.of_match = bcm6328_power_domain_ids,
+	.ops = &bcm6328_power_domain_ops,
+	.priv_auto_alloc_size = sizeof(struct bcm6328_power_domain),
+	.probe = bcm6328_power_domain_probe,
+};