3 files changed, 101 insertions, 0 deletions
diff --git a/drivers/power/pmic/Kconfig b/drivers/power/pmic/Kconfig
index bbcbcee4c35..5a61cd45b8c 100644
--- a/drivers/power/pmic/Kconfig
+++ b/drivers/power/pmic/Kconfig
@@ -295,6 +295,16 @@ config DM_PMIC_SANDBOX
 
 	Driver binding info: doc/device-tree-bindings/pmic/sandbox.txt
 
+config DM_PMIC_CPCAP
+	bool "Enable Driver Model for Motorola CPCAP"
+	help
+	The CPCAP is a Motorola/ST-Ericsson creation, a multifunctional IC
+	whose main purpose is power control. It was used in a wide variety of
+	Motorola products, both Tegra and OMAP based. The most notable devices
+	using this PMIC are the Motorola Droid 4, Atrix 4G, and Droid X2.
+	Unlike most PMICs, this one is not I2C based; it uses the SPI bus. The
+	core driver provides both read and write access to the device registers.
+
 config PMIC_S5M8767
 	bool "Enable Driver Model for the Samsung S5M8767 PMIC"
 	---help---
diff --git a/drivers/power/pmic/Makefile b/drivers/power/pmic/Makefile
index 4232cb4f5f9..2210b1a64ae 100644
--- a/drivers/power/pmic/Makefile
+++ b/drivers/power/pmic/Makefile
@@ -37,6 +37,7 @@ obj-$(CONFIG_PMIC_TPS65219) += tps65219.o
 obj-$(CONFIG_PMIC_TPS65941) += tps65941.o
 obj-$(CONFIG_PMIC_RAA215300) += raa215300.o
 obj-$(CONFIG_POWER_TPS65218) += pmic_tps65218.o
+obj-$(CONFIG_$(PHASE_)DM_PMIC_CPCAP) += cpcap.o
 
 ifeq ($(CONFIG_$(PHASE_)POWER_LEGACY),y)
 obj-$(CONFIG_POWER_LTC3676) += pmic_ltc3676.o
diff --git a/drivers/power/pmic/cpcap.c b/drivers/power/pmic/cpcap.c
new file mode 100644
index 00000000000..4923255f0a7
--- /dev/null
+++ b/drivers/power/pmic/cpcap.c
@@ -0,0 +1,90 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 2025 Svyatoslav Ryhel <clamor95@gmail.com>
+ */
+
+#include <dm.h>
+#include <dm/lists.h>
+#include <log.h>
+#include <power/pmic.h>
+#include <power/cpcap.h>
+#include <spi.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+
+static int cpcap_write(struct udevice *dev, uint reg, const uint8_t *buff, int len)
+{
+	u8 buf[4];
+	u16 data = *(u16 *)buff;
+	int ret;
+
+	buf[0] = ((reg >> 8) & 0xff) | 0x80;
+	buf[1] = reg & 0xff;
+	buf[2] = data >> 8 & 0xff;
+	buf[3] = data & 0xff;
+
+	ret = dm_spi_xfer(dev, 32, buf, NULL, SPI_XFER_ONCE);
+
+	log_debug("%s: reg 0x%x, data 0x%04x, ret %d\n", __func__, reg, data, ret);
+
+	return ret;
+}
+
+static int cpcap_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
+{
+	u8 buf[4];
+	int ret;
+
+	buf[0] = (reg >> 8) & 0xff;
+	buf[1] = reg & 0xff;
+	buf[2] = 0;
+	buf[3] = 0;
+
+	ret = dm_spi_xfer(dev, 32, buf, buf, SPI_XFER_ONCE);
+	*buff = (buf[2] << 8) | buf[3];
+
+	log_debug("%s: reg 0x%x, data 0x%04x, ret %d\n", __func__, reg, *buff, ret);
+	return ret;
+}
+
+static int cpcap_probe(struct udevice *dev)
+{
+	struct spi_slave *slave = dev_get_parent_priv(dev);
+	int ret;
+
+	ret = spi_claim_bus(slave);
+	if (ret) {
+		log_err("SPI bus allocation failed (%d)\n", ret);
+		return ret;
+	}
+
+	u16 id = pmic_reg_read(dev, CPCAP_REG_VERSC1);
+
+	u16 ven = (id >> 6) & 0x7;
+	u16 rev = ((id >> 3) & 0x7) | ((id << 3) & 0x38);
+
+	log_debug("%s: vendor %s rev: %i.%i (%x)\n", __func__,
+		  ven == CPCAP_VENDOR_ST ? "ST" : "TI",
+		  CPCAP_REVISION_MAJOR(rev), CPCAP_REVISION_MINOR(rev),
+		  rev);
+	return 0;
+}
+
+static struct dm_pmic_ops cpcap_ops = {
+	.read = cpcap_read,
+	.write = cpcap_write,
+};
+
+static const struct udevice_id cpcap_ids[] = {
+	{ .compatible = "motorola,cpcap" },
+	{ .compatible = "st,6556002" },
+	{ }
+};
+
+U_BOOT_DRIVER(pmic_cpcap) = {
+	.name = "cpcap_pmic",
+	.id = UCLASS_PMIC,
+	.of_match = cpcap_ids,
+	.probe = cpcap_probe,
+	.ops = &cpcap_ops,
+};