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 (file)
--- a/drivers/power/pmic/Kconfig
+++ b/drivers/power/pmic/Kconfig
@@ -209,3 +209,11 @@ config DM_PMIC_TPS65910
        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 (file)
--- a/drivers/power/pmic/Makefile
+++ b/drivers/power/pmic/Makefile
@@ -23,6 +23,7 @@ obj-$(CONFIG_DM_PMIC_TPS65910) += pmic_tps65910_dm.o
 obj-$(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 (file)
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,
+};

diff --git a/include/power/stpmu1.h b/include/power/stpmu1.h
new file mode 100644 (file)
index 0000000..697e245
--- /dev/null
+++ b/include/power/stpmu1.h
@@ -0,0 +1,85 @@
+/*
+ * Copyright (C) 2018, STMicroelectronics - All Rights Reserved
+ *
+ * SPDX-License-Identifier:    GPL-2.0+        BSD-3-Clause
+ */
+
+#ifndef __PMIC_STPMU1_H_
+#define __PMIC_STPMU1_H_
+
+#define STPMU1_MASK_RESET_BUCK         0x18
+#define STPMU1_BUCKX_CTRL_REG(buck)    (0x20 + (buck))
+#define STPMU1_VREF_CTRL_REG           0x24
+#define STPMU1_LDOX_CTRL_REG(ldo)      (0x25 + (ldo))
+#define STPMU1_USB_CTRL_REG            0x40
+#define STPMU1_NVM_USER_STATUS_REG     0xb8
+#define STPMU1_NVM_USER_CONTROL_REG    0xb9
+
+#define STPMU1_MASK_RESET_BUCK3                BIT(2)
+
+#define STPMU1_BUCK_EN                 BIT(0)
+#define STPMU1_BUCK_MODE               BIT(1)
+#define STPMU1_BUCK_OUTPUT_MASK                GENMASK(7, 2)
+#define STPMU1_BUCK_OUTPUT_SHIFT       2
+#define STPMU1_BUCK2_1200000V          (24 << STPMU1_BUCK_OUTPUT_SHIFT)
+#define STPMU1_BUCK2_1350000V          (30 << STPMU1_BUCK_OUTPUT_SHIFT)
+#define STPMU1_BUCK3_1800000V          (39 << STPMU1_BUCK_OUTPUT_SHIFT)
+
+#define STPMU1_VREF_EN                 BIT(0)
+
+#define STPMU1_LDO_EN                  BIT(0)
+#define STPMU1_LDO12356_OUTPUT_MASK    GENMASK(6, 2)
+#define STPMU1_LDO12356_OUTPUT_SHIFT   2
+#define STPMU1_LDO3_MODE               BIT(7)
+#define STPMU1_LDO3_DDR_SEL            31
+#define STPMU1_LDO3_1800000            (9 << STPMU1_LDO12356_OUTPUT_SHIFT)
+#define STPMU1_LDO4_UV                 3300000
+
+#define STPMU1_USB_BOOST_EN            BIT(0)
+#define STPMU1_USB_PWR_SW_EN           GENMASK(2, 1)
+
+#define STPMU1_NVM_USER_CONTROL_PROGRAM        BIT(0)
+#define STPMU1_NVM_USER_CONTROL_READ   BIT(1)
+
+#define STPMU1_NVM_USER_STATUS_BUSY    BIT(0)
+#define STPMU1_NVM_USER_STATUS_ERROR   BIT(1)
+
+#define STPMU1_DEFAULT_START_UP_DELAY_MS       1
+#define STPMU1_USB_BOOST_START_UP_DELAY_MS     10
+
+enum {
+       STPMU1_BUCK1,
+       STPMU1_BUCK2,
+       STPMU1_BUCK3,
+       STPMU1_BUCK4,
+       STPMU1_MAX_BUCK,
+};
+
+enum {
+       STPMU1_BUCK_MODE_HP,
+       STPMU1_BUCK_MODE_LP,
+};
+
+enum {
+       STPMU1_LDO1,
+       STPMU1_LDO2,
+       STPMU1_LDO3,
+       STPMU1_LDO4,
+       STPMU1_LDO5,
+       STPMU1_LDO6,
+       STPMU1_MAX_LDO,
+};
+
+enum {
+       STPMU1_LDO_MODE_NORMAL,
+       STPMU1_LDO_MODE_BYPASS,
+       STPMU1_LDO_MODE_SINK_SOURCE,
+};
+
+enum {
+       STPMU1_PWR_SW1,
+       STPMU1_PWR_SW2,
+       STPMU1_MAX_PWR_SW,
+};
+
+#endif