power: pmic: add the base MAX8907 PMIC support
Add basic i2c based read/write functions to access PMIC registers.
Tested-by: Ion Agorria <ion@agorria.com>
Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
diff --git a/drivers/power/pmic/max8907.c b/drivers/power/pmic/max8907.c
new file mode 100644
index 0000000..aeb6fe7
--- /dev/null
+++ b/drivers/power/pmic/max8907.c
@@ -0,0 +1,53 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright(C) 2024 Svyatoslav Ryhel <clamor95@gmail.com>
+ */
+
+#include <dm.h>
+#include <dm/lists.h>
+#include <power/pmic.h>
+
+static int max8907_write(struct udevice *dev, uint reg, const uint8_t *buff, int len)
+{
+ int ret;
+
+ ret = dm_i2c_write(dev, reg, buff, len);
+ if (ret) {
+ log_debug("%s: write error to device: %p register: %#x!\n",
+ __func__, dev, reg);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int max8907_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
+{
+ int ret;
+
+ ret = dm_i2c_read(dev, reg, buff, len);
+ if (ret) {
+ log_debug("%s: read error from device: %p register: %#x!\n",
+ __func__, dev, reg);
+ return ret;
+ }
+
+ return 0;
+}
+
+static struct dm_pmic_ops max8907_ops = {
+ .read = max8907_read,
+ .write = max8907_write,
+};
+
+static const struct udevice_id max8907_ids[] = {
+ { .compatible = "maxim,max8907" },
+ { }
+};
+
+U_BOOT_DRIVER(pmic_max8907) = {
+ .name = "max8907_pmic",
+ .id = UCLASS_PMIC,
+ .of_match = max8907_ids,
+ .ops = &max8907_ops,
+};