diff --git a/drivers/pwm/pwm-raspberrypi-poe.c b/drivers/pwm/pwm-raspberrypi-poe.c
index 2939b71a7ba7..4cf3d6fd5011 100644
--- a/drivers/pwm/pwm-raspberrypi-poe.c
+++ b/drivers/pwm/pwm-raspberrypi-poe.c
@@ -16,6 +16,7 @@
 #include <linux/of.h>
 #include <linux/platform_device.h>
 #include <linux/pwm.h>
+#include <linux/regmap.h>
 
 #include <soc/bcm2835/raspberrypi-firmware.h>
 #include <dt-bindings/pwm/raspberrypi,firmware-poe-pwm.h>
@@ -27,6 +28,10 @@
 
 struct raspberrypi_pwm {
 	struct rpi_firmware *firmware;
+
+	struct regmap *regmap;
+	u32 offset;
+
 	struct pwm_chip chip;
 	unsigned int duty_cycle;
 };
@@ -43,7 +48,7 @@ struct raspberrypi_pwm *raspberrypi_pwm_from_chip(struct pwm_chip *chip)
 	return container_of(chip, struct raspberrypi_pwm, chip);
 }
 
-static int raspberrypi_pwm_set_property(struct rpi_firmware *firmware,
+static int raspberrypi_pwm_set_property(struct raspberrypi_pwm *pwm,
 					u32 reg, u32 val)
 {
 	struct raspberrypi_pwm_prop msg = {
@@ -52,17 +57,19 @@ static int raspberrypi_pwm_set_property(struct rpi_firmware *firmware,
 	};
 	int ret;
 
-	ret = rpi_firmware_property(firmware, RPI_FIRMWARE_SET_POE_HAT_VAL,
-				    &msg, sizeof(msg));
-	if (ret)
-		return ret;
-	if (msg.ret)
-		return -EIO;
+	if (pwm->firmware) {
+		ret = rpi_firmware_property(pwm->firmware, RPI_FIRMWARE_SET_POE_HAT_VAL,
+					    &msg, sizeof(msg));
+		if (!ret && msg.ret)
+			ret = -EIO;
+	} else {
+		ret = regmap_write(pwm->regmap, pwm->offset + reg, val);
+	}
 
-	return 0;
+	return ret;
 }
 
-static int raspberrypi_pwm_get_property(struct rpi_firmware *firmware,
+static int raspberrypi_pwm_get_property(struct raspberrypi_pwm *pwm,
 					u32 reg, u32 *val)
 {
 	struct raspberrypi_pwm_prop msg = {
@@ -70,16 +77,17 @@ static int raspberrypi_pwm_get_property(struct rpi_firmware *firmware,
 	};
 	int ret;
 
-	ret = rpi_firmware_property(firmware, RPI_FIRMWARE_GET_POE_HAT_VAL,
-				    &msg, sizeof(msg));
-	if (ret)
-		return ret;
-	if (msg.ret)
-		return -EIO;
+	if (pwm->firmware) {
+		ret = rpi_firmware_property(pwm->firmware, RPI_FIRMWARE_GET_POE_HAT_VAL,
+					    &msg, sizeof(msg));
+		if (!ret && msg.ret)
+			ret = -EIO;
+		*val = le32_to_cpu(msg.val);
+	} else {
+		ret = regmap_read(pwm->regmap, pwm->offset + reg, val);
+	}
 
-	*val = le32_to_cpu(msg.val);
-
-	return 0;
+	return ret;
 }
 
 static int raspberrypi_pwm_get_state(struct pwm_chip *chip,
@@ -119,7 +127,7 @@ static int raspberrypi_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
 	if (duty_cycle == rpipwm->duty_cycle)
 		return 0;
 
-	ret = raspberrypi_pwm_set_property(rpipwm->firmware, RPI_PWM_CUR_DUTY_REG,
+	ret = raspberrypi_pwm_set_property(rpipwm, RPI_PWM_CUR_DUTY_REG,
 					   duty_cycle);
 	if (ret) {
 		dev_err(chip->dev, "Failed to set duty cycle: %pe\n",
@@ -146,28 +154,34 @@ static int raspberrypi_pwm_probe(struct platform_device *pdev)
 	struct raspberrypi_pwm *rpipwm;
 	int ret;
 
-	firmware_node = of_get_parent(dev->of_node);
-	if (!firmware_node) {
-		dev_err(dev, "Missing firmware node\n");
-		return -ENOENT;
-	}
-
-	firmware = devm_rpi_firmware_get(&pdev->dev, firmware_node);
-	of_node_put(firmware_node);
-	if (!firmware)
-		return dev_err_probe(dev, -EPROBE_DEFER,
-				     "Failed to get firmware handle\n");
-
 	rpipwm = devm_kzalloc(&pdev->dev, sizeof(*rpipwm), GFP_KERNEL);
 	if (!rpipwm)
 		return -ENOMEM;
 
-	rpipwm->firmware = firmware;
+	if (pdev->dev.parent)
+		rpipwm->regmap = dev_get_regmap(pdev->dev.parent, NULL);
+
+	if (rpipwm->regmap) {
+		ret = device_property_read_u32(&pdev->dev, "reg", &rpipwm->offset);
+		if (ret)
+			return -EINVAL;
+	} else {
+		firmware_node = of_get_parent(dev->of_node);
+
+		firmware = devm_rpi_firmware_get(&pdev->dev, firmware_node);
+		of_node_put(firmware_node);
+		if (!firmware)
+			return dev_err_probe(dev, -EPROBE_DEFER,
+					     "Failed to get firmware handle\n");
+
+		rpipwm->firmware = firmware;
+	}
+
 	rpipwm->chip.dev = dev;
 	rpipwm->chip.ops = &raspberrypi_pwm_ops;
 	rpipwm->chip.npwm = RASPBERRYPI_FIRMWARE_PWM_NUM;
 
-	ret = raspberrypi_pwm_get_property(rpipwm->firmware, RPI_PWM_CUR_DUTY_REG,
+	ret = raspberrypi_pwm_get_property(rpipwm, RPI_PWM_CUR_DUTY_REG,
 					   &rpipwm->duty_cycle);
 	if (ret) {
 		dev_err(dev, "Failed to get duty cycle: %pe\n", ERR_PTR(ret));
@@ -179,6 +193,7 @@ static int raspberrypi_pwm_probe(struct platform_device *pdev)
 
 static const struct of_device_id raspberrypi_pwm_of_match[] = {
 	{ .compatible = "raspberrypi,firmware-poe-pwm", },
+	{ .compatible = "raspberrypi,poe-pwm", },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, raspberrypi_pwm_of_match);