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

source/bootloader/u-boot-2020.01/drivers/power/pmic/fan53555.c

@@ -0,0 +1,85 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * (C) 2018 Theobroma Systems Design und Consulting GmbH
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <dm/device-internal.h>
+#include <dm/lists.h>
+#include <i2c.h>
+#include <power/fan53555.h>
+#include <power/pmic.h>
+#include <power/regulator.h>
+
+static int pmic_fan53555_reg_count(struct udevice *dev)
+{
+	return 1;
+};
+
+static int pmic_fan53555_read(struct udevice *dev, uint reg,
+			      u8 *buff, int len)
+{
+	if (dm_i2c_read(dev, reg, buff, len)) {
+		pr_err("%s: read error for register: %#x!", dev->name, reg);
+		return -EIO;
+	}
+
+	return 0;
+}
+
+static int pmic_fan53555_write(struct udevice *dev, uint reg,
+			       const u8 *buff, int len)
+{
+	if (dm_i2c_write(dev, reg, buff, len)) {
+		pr_err("%s: write error for register: %#x!", dev->name, reg);
+		return -EIO;
+	}
+
+	return 0;
+}
+
+static int pmic_fan53555_bind(struct udevice *dev)
+{
+	/*
+	 * The FAN53555 has only a single regulator and therefore doesn't
+	 * have a subnode.  So we have to rebind a child device (the one
+	 * regulator) here.
+	 */
+
+	const char *regulator_driver_name = "fan53555_regulator";
+	struct udevice *child;
+	struct driver *drv;
+
+	debug("%s\n", __func__);
+
+	drv = lists_driver_lookup_name(regulator_driver_name);
+	if (!drv) {
+		dev_err(dev, "no driver '%s'\n", regulator_driver_name);
+		return -ENOENT;
+	}
+
+	return device_bind_with_driver_data(dev, drv, "SW", dev->driver_data,
+					    dev_ofnode(dev), &child);
+};
+
+static struct dm_pmic_ops pmic_fan53555_ops = {
+	.reg_count = pmic_fan53555_reg_count,
+	.read = pmic_fan53555_read,
+	.write = pmic_fan53555_write,
+};
+
+static const struct udevice_id pmic_fan53555_match[] = {
+	{ .compatible = "fcs,fan53555", .data = FAN53555_VENDOR_FAIRCHILD, },
+	{ .compatible = "silergy,syr827", .data = FAN53555_VENDOR_SILERGY, },
+	{ .compatible = "silergy,syr828", .data = FAN53555_VENDOR_SILERGY, },
+	{ },
+};
+
+U_BOOT_DRIVER(pmic_fan53555) = {
+	.name = "pmic_fan53555",
+	.id = UCLASS_PMIC,
+	.of_match = pmic_fan53555_match,
+	.bind = pmic_fan53555_bind,
+	.ops = &pmic_fan53555_ops,
+};