regulator: bd71837: copy the bd71837 pmic driver from NXP imx u-boot

https://source.codeaurora.org/external/imx/uboot-imx

cherry picked, styled and merged commits:
- MLK-18387 pmic: Add pmic driver for BD71837: e9a3bec2e95a
- MLK-18590 pmic: bd71837: Change to use new fdt API: acdc5c297a96

Signed-off-by: Ye Li <ye.li@nxp.com>
Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

diff --git a/drivers/power/pmic/Kconfig b/drivers/power/pmic/Kconfig
index b0cd26035432c7d9ef69d96d5efe182a2f21f9ef..450935fdc16e2dfa838b4cc5baf9e95541369d59 100644 (file)
--- a/drivers/power/pmic/Kconfig
+++ b/drivers/power/pmic/Kconfig
@@ -48,6 +48,13 @@ config PMIC_AS3722
          interface and is designs to cover most of the power managementment
          required for a tablets or laptop.
 
+config DM_PMIC_BD71837
+       bool "Enable Driver Model for PMIC BD71837"
+       depends on DM_PMIC
+       help
+         This config enables implementation of driver-model pmic uclass features
+         for PMIC BD71837. The driver implements read/write operations.
+
 config DM_PMIC_FAN53555
        bool "Enable support for OnSemi FAN53555"
        depends on DM_PMIC && DM_REGULATOR && DM_I2C

diff --git a/drivers/power/pmic/Makefile b/drivers/power/pmic/Makefile
index ce250cb1555afd724bf4377c10cc897ddc5aa1a7..888dbb2857397630cf2f74fbde750310675de652 100644 (file)
--- a/drivers/power/pmic/Makefile
+++ b/drivers/power/pmic/Makefile
@@ -8,6 +8,7 @@ obj-$(CONFIG_DM_PMIC_FAN53555) += fan53555.o
 obj-$(CONFIG_DM_PMIC_MAX77686) += max77686.o
 obj-$(CONFIG_DM_PMIC_MAX8998) += max8998.o
 obj-$(CONFIG_DM_PMIC_MC34708) += mc34708.o
+obj-$(CONFIG_$(SPL_)DM_PMIC_BD71837) += bd71837.o
 obj-$(CONFIG_$(SPL_)DM_PMIC_PFUZE100) += pfuze100.o
 obj-$(CONFIG_PMIC_S2MPS11) += s2mps11.o
 obj-$(CONFIG_DM_PMIC_SANDBOX) += sandbox.o i2c_pmic_emul.o

diff --git a/drivers/power/pmic/bd71837.c b/drivers/power/pmic/bd71837.c
new file mode 100644 (file)
index 0000000..24d9f7f
--- /dev/null
+++ b/drivers/power/pmic/bd71837.c
@@ -0,0 +1,89 @@
+// SPDX-License-Identifier:      GPL-2.0+
+/*
+ * Copyright 2018 NXP
+ */
+
+#include <common.h>
+#include <errno.h>
+#include <dm.h>
+#include <i2c.h>
+#include <power/pmic.h>
+#include <power/regulator.h>
+#include <power/bd71837.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static const struct pmic_child_info pmic_children_info[] = {
+       /* buck */
+       { .prefix = "b", .driver = BD71837_REGULATOR_DRIVER},
+       /* ldo */
+       { .prefix = "l", .driver = BD71837_REGULATOR_DRIVER},
+       { },
+};
+
+static int bd71837_reg_count(struct udevice *dev)
+{
+       return BD71837_REG_NUM;
+}
+
+static int bd71837_write(struct udevice *dev, uint reg, const uint8_t *buff,
+                        int len)
+{
+       if (dm_i2c_write(dev, reg, buff, len)) {
+               pr_err("write error to device: %p register: %#x!", dev, reg);
+               return -EIO;
+       }
+
+       return 0;
+}
+
+static int bd71837_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
+{
+       if (dm_i2c_read(dev, reg, buff, len)) {
+               pr_err("read error from device: %p register: %#x!", dev, reg);
+               return -EIO;
+       }
+
+       return 0;
+}
+
+static int bd71837_bind(struct udevice *dev)
+{
+       int children;
+       ofnode regulators_node;
+
+       regulators_node = dev_read_subnode(dev, "regulators");
+       if (!ofnode_valid(regulators_node)) {
+               debug("%s: %s regulators subnode not found!", __func__,
+                     dev->name);
+               return -ENXIO;
+       }
+
+       debug("%s: '%s' - found regulators subnode\n", __func__, dev->name);
+
+       children = pmic_bind_children(dev, regulators_node, pmic_children_info);
+       if (!children)
+               debug("%s: %s - no child found\n", __func__, dev->name);
+
+       /* Always return success for this device */
+       return 0;
+}
+
+static struct dm_pmic_ops bd71837_ops = {
+       .reg_count = bd71837_reg_count,
+       .read = bd71837_read,
+       .write = bd71837_write,
+};
+
+static const struct udevice_id bd71837_ids[] = {
+       { .compatible = "rohm,bd71837", .data = 0x4b, },
+       { }
+};
+
+U_BOOT_DRIVER(pmic_bd71837) = {
+       .name = "bd71837 pmic",
+       .id = UCLASS_PMIC,
+       .of_match = bd71837_ids,
+       .bind = bd71837_bind,
+       .ops = &bd71837_ops,
+};

diff --git a/include/power/bd71837.h b/include/power/bd71837.h
new file mode 100644 (file)
index 0000000..38c69b2
--- /dev/null
+++ b/include/power/bd71837.h
@@ -0,0 +1,62 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/* Copyright (C) 2018 ROHM Semiconductors */
+
+#ifndef BD71837_H_
+#define BD71837_H_
+
+#define BD71837_REGULATOR_DRIVER "bd71837_regulator"
+
+enum {
+       BD71837_REV             = 0x00,
+       BD71837_SWRESET         = 0x01,
+       BD71837_I2C_DEV         = 0x02,
+       BD71837_PWRCTRL0        = 0x03,
+       BD71837_PWRCTRL1        = 0x04,
+       BD71837_BUCK1_CTRL      = 0x05,
+       BD71837_BUCK2_CTRL      = 0x06,
+       BD71837_BUCK3_CTRL      = 0x07,
+       BD71837_BUCK4_CTRL      = 0x08,
+       BD71837_BUCK5_CTRL      = 0x09,
+       BD71837_BUCK6_CTRL      = 0x0a,
+       BD71837_BUCK7_CTRL      = 0x0b,
+       BD71837_BUCK8_CTRL      = 0x0c,
+       BD71837_BUCK1_VOLT_RUN  = 0x0d,
+       BD71837_BUCK1_VOLT_IDLE = 0x0e,
+       BD71837_BUCK1_VOLT_SUSP = 0x0f,
+       BD71837_BUCK2_VOLT_RUN  = 0x10,
+       BD71837_BUCK2_VOLT_IDLE = 0x11,
+       BD71837_BUCK3_VOLT_RUN  = 0x12,
+       BD71837_BUCK4_VOLT_RUN  = 0x13,
+       BD71837_BUCK5_VOLT      = 0x14,
+       BD71837_BUCK6_VOLT      = 0x15,
+       BD71837_BUCK7_VOLT      = 0x16,
+       BD71837_BUCK8_VOLT      = 0x17,
+       BD71837_LDO1_VOLT       = 0x18,
+       BD71837_LDO2_VOLT       = 0x19,
+       BD71837_LDO3_VOLT       = 0x1a,
+       BD71837_LDO4_VOLT       = 0x1b,
+       BD71837_LDO5_VOLT       = 0x1c,
+       BD71837_LDO6_VOLT       = 0x1d,
+       BD71837_LDO7_VOLT       = 0x1e,
+       BD71837_TRANS_COND0     = 0x1f,
+       BD71837_TRANS_COND1     = 0x20,
+       BD71837_VRFAULTEN       = 0x21,
+       BD71837_MVRFLTMASK0     = 0x22,
+       BD71837_MVRFLTMASK1     = 0x23,
+       BD71837_MVRFLTMASK2     = 0x24,
+       BD71837_RCVCFG          = 0x25,
+       BD71837_RCVNUM          = 0x26,
+       BD71837_PWRONCONFIG0    = 0x27,
+       BD71837_PWRONCONFIG1    = 0x28,
+       BD71837_RESETSRC        = 0x29,
+       BD71837_MIRQ            = 0x2a,
+       BD71837_IRQ             = 0x2b,
+       BD71837_IN_MON          = 0x2c,
+       BD71837_POW_STATE       = 0x2d,
+       BD71837_OUT32K          = 0x2e,
+       BD71837_REGLOCK         = 0x2f,
+       BD71837_MUXSW_EN        = 0x30,
+       BD71837_REG_NUM,
+};
+
+#endif