pmic: add stpmu1 support
This driver implements register read/write operations for STPMU1.
The STPMU1 PMIC provides 4 BUCKs, 6 LDOs, 1 VREF
and 2 power switches. It is accessed via an I2C interface.
This device is used with STM32MP1 SoCs.
Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
diff --git a/drivers/power/pmic/Kconfig b/drivers/power/pmic/Kconfig
index 5d49c93..40ab9f7 100644
--- a/drivers/power/pmic/Kconfig
+++ b/drivers/power/pmic/Kconfig
@@ -209,3 +209,11 @@
The TPS65910 is a PMIC containing 3 buck DC-DC converters, one boost
DC-DC converter, 8 LDOs and a RTC. This driver binds the SMPS and LDO
pmic children.
+
+config PMIC_STPMU1
+ bool "Enable support for STMicroelectronics STPMU1 PMIC"
+ depends on DM_PMIC && DM_I2C
+ ---help---
+ The STPMU1 PMIC provides 4 BUCKs, 6 LDOs, 1 VREF and 2 power switches.
+ It is accessed via an I2C interface. The device is used with STM32MP1
+ SoCs. This driver implements register read/write operations.
diff --git a/drivers/power/pmic/Makefile b/drivers/power/pmic/Makefile
index fc19fdc..ad32068 100644
--- a/drivers/power/pmic/Makefile
+++ b/drivers/power/pmic/Makefile
@@ -23,6 +23,7 @@
obj-$(CONFIG_$(SPL_)PMIC_PALMAS) += palmas.o
obj-$(CONFIG_$(SPL_)PMIC_LP873X) += lp873x.o
obj-$(CONFIG_$(SPL_)PMIC_LP87565) += lp87565.o
+obj-$(CONFIG_PMIC_STPMU1) += stpmu1.o
obj-$(CONFIG_POWER_LTC3676) += pmic_ltc3676.o
obj-$(CONFIG_POWER_MAX77696) += pmic_max77696.o
diff --git a/drivers/power/pmic/stpmu1.c b/drivers/power/pmic/stpmu1.c
new file mode 100644
index 0000000..4615365
--- /dev/null
+++ b/drivers/power/pmic/stpmu1.c
@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2018, STMicroelectronics - All Rights Reserved
+ *
+ * SPDX-License-Identifier: GPL-2.0+ BSD-3-Clause
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <errno.h>
+#include <i2c.h>
+#include <power/pmic.h>
+#include <power/stpmu1.h>
+
+#define STMPU1_NUM_OF_REGS 0x100
+
+static int stpmu1_reg_count(struct udevice *dev)
+{
+ return STMPU1_NUM_OF_REGS;
+}
+
+static int stpmu1_write(struct udevice *dev, uint reg, const uint8_t *buff,
+ int len)
+{
+ int ret;
+
+ ret = dm_i2c_write(dev, reg, buff, len);
+ if (ret)
+ dev_err(dev, "%s: failed to write register %#x :%d",
+ __func__, reg, ret);
+
+ return ret;
+}
+
+static int stpmu1_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
+{
+ int ret;
+
+ ret = dm_i2c_read(dev, reg, buff, len);
+ if (ret)
+ dev_err(dev, "%s: failed to read register %#x : %d",
+ __func__, reg, ret);
+
+ return ret;
+}
+
+static struct dm_pmic_ops stpmu1_ops = {
+ .reg_count = stpmu1_reg_count,
+ .read = stpmu1_read,
+ .write = stpmu1_write,
+};
+
+static const struct udevice_id stpmu1_ids[] = {
+ { .compatible = "st,stpmu1" },
+ { }
+};
+
+U_BOOT_DRIVER(pmic_stpmu1) = {
+ .name = "stpmu1_pmic",
+ .id = UCLASS_PMIC,
+ .of_match = stpmu1_ids,
+ .ops = &stpmu1_ops,
+};