[PATCH v3 03/10] mfd: support ROHM BD96801 PMIC core

From: Matti Vaittinen
Date: Tue Jun 04 2024 - 03:54:51 EST

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The ROHM BD96801 PMIC is highly customizable automotive grade PMIC
which integrates regulator and watchdog funtionalities.

Provide INTB IRQ and register accesses for regulator/watchdog drivers.

Signed-off-by: Matti Vaittinen <mazziesaccount@xxxxxxxxx>

---
Changelog:
v2 =>:
- No changes

v1 => v2:
- Drop unused enum
- Improve error prints
- improve comments

RFCv2 => v1:
- drop ERRB interrupts (for now)
- bd96801: Unlock registers in core driver

Changelog: RFCv1 => RFCv2
- Work-around the IRQ domain name conflict
- Add watchdog IRQ
- Various styling fixes based on review by Lee
---
drivers/mfd/Kconfig | 13 ++
drivers/mfd/Makefile | 1 +
drivers/mfd/rohm-bd96801.c | 273 +++++++++++++++++++++++++++++++
include/linux/mfd/rohm-bd96801.h | 215 ++++++++++++++++++++++++
include/linux/mfd/rohm-generic.h | 1 +
5 files changed, 503 insertions(+)
create mode 100644 drivers/mfd/rohm-bd96801.c
create mode 100644 include/linux/mfd/rohm-bd96801.h

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 266b4f54af60..68cc7af9ef97 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -2089,6 +2089,19 @@ config MFD_ROHM_BD957XMUF
BD9573MUF Power Management ICs. BD9576 and BD9573 are primarily
designed to be used to power R-Car series processors.

+config MFD_ROHM_BD96801
+ tristate "ROHM BD96801 Power Management IC"
+ depends on I2C=y
+ depends on OF
+ select REGMAP_I2C
+ select REGMAP_IRQ
+ select MFD_CORE
+ help
+ Select this option to get support for the ROHM BD96801 Power
+ Management IC. The ROHM BD96801 is a highly scalable Power Management
+ IC for industrial and automotive use. The BD96801 can be used as a
+ master PMIC in a chained PMIC solution with suitable companion PMICs.
+
config MFD_STM32_LPTIMER
tristate "Support for STM32 Low-Power Timer"
depends on (ARCH_STM32 && OF) || COMPILE_TEST
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index c66f07edcd0e..e792892d4a8b 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -264,6 +264,7 @@ obj-$(CONFIG_RAVE_SP_CORE) += rave-sp.o
obj-$(CONFIG_MFD_ROHM_BD71828) += rohm-bd71828.o
obj-$(CONFIG_MFD_ROHM_BD718XX) += rohm-bd718x7.o
obj-$(CONFIG_MFD_ROHM_BD957XMUF) += rohm-bd9576.o
+obj-$(CONFIG_MFD_ROHM_BD96801) += rohm-bd96801.o
obj-$(CONFIG_MFD_STMFX) += stmfx.o
obj-$(CONFIG_MFD_KHADAS_MCU) += khadas-mcu.o
obj-$(CONFIG_MFD_ACER_A500_EC) += acer-ec-a500.o
diff --git a/drivers/mfd/rohm-bd96801.c b/drivers/mfd/rohm-bd96801.c
new file mode 100644
index 000000000000..1c2a9591be7b
--- /dev/null
+++ b/drivers/mfd/rohm-bd96801.c
@@ -0,0 +1,273 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2024 ROHM Semiconductors
+ *
+ * ROHM BD96801 PMIC driver
+ *
+ * This version of the "BD86801 scalable PMIC"'s driver supports only very
+ * basic set of the PMIC features. Most notably, there is no support for
+ * the ERRB interrupt and the configurations which should be done when the
+ * PMIC is in STBY mode.
+ *
+ * Supporting the ERRB interrupt would require dropping the regmap-IRQ
+ * usage or working around (or accepting a presense of) a naming conflict
+ * in debugFS IRQs.
+ *
+ * Being able to reliably do the configurations like changing the
+ * regulator safety limits (like limits for the over/under -voltages, over
+ * current, thermal protection) would require the configuring driver to be
+ * synchronized with entity causing the PMIC state transitions. Eg, one
+ * should be able to ensure the PMIC is in STBY state when the
+ * configurations are applied to the hardware. How and when the PMIC state
+ * transitions are to be done is likely to be very system specific, as will
+ * be the need to configure these safety limits. Hence it's not simple to
+ * come up with a generic solution.
+ *
+ * Users who require the ERRB handling and STBY state configurations can
+ * have a look at the original RFC:
+ * https://lore.kernel.org/all/cover.1712920132.git.mazziesaccount@xxxxxxxxx/
+ * which implements a workaround to debugFS naming conflict and some of
+ * the safety limit configurations - but leaves the state change handling
+ * and synchronization to be implemented.
+ *
+ * It would be great to hear (and receive a patch!) if you implement the
+ * STBY configuration support or a proper fix to the debugFS naming
+ * conflict in your downstream driver ;)
+ */
+
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/mfd/core.h>
+#include <linux/module.h>
+#include <linux/property.h>
+#include <linux/regmap.h>
+#include <linux/types.h>
+
+#include <linux/mfd/rohm-bd96801.h>
+#include <linux/mfd/rohm-generic.h>
+static const struct resource regulator_intb_irqs[] = {
+ DEFINE_RES_IRQ_NAMED(BD96801_TW_STAT, "bd96801-core-thermal"),
+
+ DEFINE_RES_IRQ_NAMED(BD96801_BUCK1_OCPH_STAT, "bd96801-buck1-overcurr-h"),
+ DEFINE_RES_IRQ_NAMED(BD96801_BUCK1_OCPL_STAT, "bd96801-buck1-overcurr-l"),
+ DEFINE_RES_IRQ_NAMED(BD96801_BUCK1_OCPN_STAT, "bd96801-buck1-overcurr-n"),
+ DEFINE_RES_IRQ_NAMED(BD96801_BUCK1_OVD_STAT, "bd96801-buck1-overvolt"),
+ DEFINE_RES_IRQ_NAMED(BD96801_BUCK1_UVD_STAT, "bd96801-buck1-undervolt"),
+ DEFINE_RES_IRQ_NAMED(BD96801_BUCK1_TW_CH_STAT, "bd96801-buck1-thermal"),
+
+ DEFINE_RES_IRQ_NAMED(BD96801_BUCK2_OCPH_STAT, "bd96801-buck2-overcurr-h"),
+ DEFINE_RES_IRQ_NAMED(BD96801_BUCK2_OCPL_STAT, "bd96801-buck2-overcurr-l"),
+ DEFINE_RES_IRQ_NAMED(BD96801_BUCK2_OCPN_STAT, "bd96801-buck2-overcurr-n"),
+ DEFINE_RES_IRQ_NAMED(BD96801_BUCK2_OVD_STAT, "bd96801-buck2-overvolt"),
+ DEFINE_RES_IRQ_NAMED(BD96801_BUCK2_UVD_STAT, "bd96801-buck2-undervolt"),
+ DEFINE_RES_IRQ_NAMED(BD96801_BUCK2_TW_CH_STAT, "bd96801-buck2-thermal"),
+
+ DEFINE_RES_IRQ_NAMED(BD96801_BUCK3_OCPH_STAT, "bd96801-buck3-overcurr-h"),
+ DEFINE_RES_IRQ_NAMED(BD96801_BUCK3_OCPL_STAT, "bd96801-buck3-overcurr-l"),
+ DEFINE_RES_IRQ_NAMED(BD96801_BUCK3_OCPN_STAT, "bd96801-buck3-overcurr-n"),
+ DEFINE_RES_IRQ_NAMED(BD96801_BUCK3_OVD_STAT, "bd96801-buck3-overvolt"),
+ DEFINE_RES_IRQ_NAMED(BD96801_BUCK3_UVD_STAT, "bd96801-buck3-undervolt"),
+ DEFINE_RES_IRQ_NAMED(BD96801_BUCK3_TW_CH_STAT, "bd96801-buck3-thermal"),
+
+ DEFINE_RES_IRQ_NAMED(BD96801_BUCK4_OCPH_STAT, "bd96801-buck4-overcurr-h"),
+ DEFINE_RES_IRQ_NAMED(BD96801_BUCK4_OCPL_STAT, "bd96801-buck4-overcurr-l"),
+ DEFINE_RES_IRQ_NAMED(BD96801_BUCK4_OCPN_STAT, "bd96801-buck4-overcurr-n"),
+ DEFINE_RES_IRQ_NAMED(BD96801_BUCK4_OVD_STAT, "bd96801-buck4-overvolt"),
+ DEFINE_RES_IRQ_NAMED(BD96801_BUCK4_UVD_STAT, "bd96801-buck4-undervolt"),
+ DEFINE_RES_IRQ_NAMED(BD96801_BUCK4_TW_CH_STAT, "bd96801-buck4-thermal"),
+
+ DEFINE_RES_IRQ_NAMED(BD96801_LDO5_OCPH_STAT, "bd96801-ldo5-overcurr"),
+ DEFINE_RES_IRQ_NAMED(BD96801_LDO5_OVD_STAT, "bd96801-ldo5-overvolt"),
+ DEFINE_RES_IRQ_NAMED(BD96801_LDO5_UVD_STAT, "bd96801-ldo5-undervolt"),
+
+ DEFINE_RES_IRQ_NAMED(BD96801_LDO6_OCPH_STAT, "bd96801-ldo6-overcurr"),
+ DEFINE_RES_IRQ_NAMED(BD96801_LDO6_OVD_STAT, "bd96801-ldo6-overvolt"),
+ DEFINE_RES_IRQ_NAMED(BD96801_LDO6_UVD_STAT, "bd96801-ldo6-undervolt"),
+
+ DEFINE_RES_IRQ_NAMED(BD96801_LDO7_OCPH_STAT, "bd96801-ldo7-overcurr"),
+ DEFINE_RES_IRQ_NAMED(BD96801_LDO7_OVD_STAT, "bd96801-ldo7-overvolt"),
+ DEFINE_RES_IRQ_NAMED(BD96801_LDO7_UVD_STAT, "bd96801-ldo7-undervolt"),
+};
+
+static const struct resource wdg_intb_irqs[] = {
+ DEFINE_RES_IRQ_NAMED(BD96801_WDT_ERR_STAT, "bd96801-wdg"),
+};
+
+static struct mfd_cell bd96801_mfd_cells[] = {
+ {
+ .name = "bd96801-wdt",
+ .resources = wdg_intb_irqs,
+ .num_resources = ARRAY_SIZE(wdg_intb_irqs),
+ }, {
+ .name = "bd96801-pmic",
+ .resources = regulator_intb_irqs,
+ .num_resources = ARRAY_SIZE(regulator_intb_irqs),
+ },
+};
+
+static const struct regmap_range bd96801_volatile_ranges[] = {
+ /* Status registers */
+ regmap_reg_range(BD96801_REG_WD_FEED, BD96801_REG_WD_FAILCOUNT),
+ regmap_reg_range(BD96801_REG_WD_ASK, BD96801_REG_WD_ASK),
+ regmap_reg_range(BD96801_REG_WD_STATUS, BD96801_REG_WD_STATUS),
+ regmap_reg_range(BD96801_REG_PMIC_STATE, BD96801_REG_INT_LDO7_INTB),
+ /* Registers which do not update value unless PMIC is in STBY */
+ regmap_reg_range(BD96801_REG_SSCG_CTRL, BD96801_REG_SHD_INTB),
+ regmap_reg_range(BD96801_REG_BUCK_OVP, BD96801_REG_BOOT_OVERTIME),
+ /*
+ * LDO control registers have single bit (LDO MODE) which does not
+ * change when we write it unless PMIC is in STBY. It's safer to not
+ * cache it.
+ */
+ regmap_reg_range(BD96801_LDO5_VOL_LVL_REG, BD96801_LDO7_VOL_LVL_REG),
+};
+
+static const struct regmap_access_table volatile_regs = {
+ .yes_ranges = bd96801_volatile_ranges,
+ .n_yes_ranges = ARRAY_SIZE(bd96801_volatile_ranges),
+};
+
+static const struct regmap_irq bd96801_intb_irqs[] = {
+ /* STATUS SYSTEM INTB */
+ REGMAP_IRQ_REG(BD96801_TW_STAT, 0, BD96801_TW_STAT_MASK),
+ REGMAP_IRQ_REG(BD96801_WDT_ERR_STAT, 0, BD96801_WDT_ERR_STAT_MASK),
+ REGMAP_IRQ_REG(BD96801_I2C_ERR_STAT, 0, BD96801_I2C_ERR_STAT_MASK),
+ REGMAP_IRQ_REG(BD96801_CHIP_IF_ERR_STAT, 0, BD96801_CHIP_IF_ERR_STAT_MASK),
+ /* STATUS BUCK1 INTB */
+ REGMAP_IRQ_REG(BD96801_BUCK1_OCPH_STAT, 1, BD96801_BUCK_OCPH_STAT_MASK),
+ REGMAP_IRQ_REG(BD96801_BUCK1_OCPL_STAT, 1, BD96801_BUCK_OCPL_STAT_MASK),
+ REGMAP_IRQ_REG(BD96801_BUCK1_OCPN_STAT, 1, BD96801_BUCK_OCPN_STAT_MASK),
+ REGMAP_IRQ_REG(BD96801_BUCK1_OVD_STAT, 1, BD96801_BUCK_OVD_STAT_MASK),
+ REGMAP_IRQ_REG(BD96801_BUCK1_UVD_STAT, 1, BD96801_BUCK_UVD_STAT_MASK),
+ REGMAP_IRQ_REG(BD96801_BUCK1_TW_CH_STAT, 1, BD96801_BUCK_TW_CH_STAT_MASK),
+ /* BUCK 2 INTB */
+ REGMAP_IRQ_REG(BD96801_BUCK2_OCPH_STAT, 2, BD96801_BUCK_OCPH_STAT_MASK),
+ REGMAP_IRQ_REG(BD96801_BUCK2_OCPL_STAT, 2, BD96801_BUCK_OCPL_STAT_MASK),
+ REGMAP_IRQ_REG(BD96801_BUCK2_OCPN_STAT, 2, BD96801_BUCK_OCPN_STAT_MASK),
+ REGMAP_IRQ_REG(BD96801_BUCK2_OVD_STAT, 2, BD96801_BUCK_OVD_STAT_MASK),
+ REGMAP_IRQ_REG(BD96801_BUCK2_UVD_STAT, 2, BD96801_BUCK_UVD_STAT_MASK),
+ REGMAP_IRQ_REG(BD96801_BUCK2_TW_CH_STAT, 2, BD96801_BUCK_TW_CH_STAT_MASK),
+ /* BUCK 3 INTB */
+ REGMAP_IRQ_REG(BD96801_BUCK3_OCPH_STAT, 3, BD96801_BUCK_OCPH_STAT_MASK),
+ REGMAP_IRQ_REG(BD96801_BUCK3_OCPL_STAT, 3, BD96801_BUCK_OCPL_STAT_MASK),
+ REGMAP_IRQ_REG(BD96801_BUCK3_OCPN_STAT, 3, BD96801_BUCK_OCPN_STAT_MASK),
+ REGMAP_IRQ_REG(BD96801_BUCK3_OVD_STAT, 3, BD96801_BUCK_OVD_STAT_MASK),
+ REGMAP_IRQ_REG(BD96801_BUCK3_UVD_STAT, 3, BD96801_BUCK_UVD_STAT_MASK),
+ REGMAP_IRQ_REG(BD96801_BUCK3_TW_CH_STAT, 3, BD96801_BUCK_TW_CH_STAT_MASK),
+ /* BUCK 4 INTB */
+ REGMAP_IRQ_REG(BD96801_BUCK4_OCPH_STAT, 4, BD96801_BUCK_OCPH_STAT_MASK),
+ REGMAP_IRQ_REG(BD96801_BUCK4_OCPL_STAT, 4, BD96801_BUCK_OCPL_STAT_MASK),
+ REGMAP_IRQ_REG(BD96801_BUCK4_OCPN_STAT, 4, BD96801_BUCK_OCPN_STAT_MASK),
+ REGMAP_IRQ_REG(BD96801_BUCK4_OVD_STAT, 4, BD96801_BUCK_OVD_STAT_MASK),
+ REGMAP_IRQ_REG(BD96801_BUCK4_UVD_STAT, 4, BD96801_BUCK_UVD_STAT_MASK),
+ REGMAP_IRQ_REG(BD96801_BUCK4_TW_CH_STAT, 4, BD96801_BUCK_TW_CH_STAT_MASK),
+ /* LDO5 INTB */
+ REGMAP_IRQ_REG(BD96801_LDO5_OCPH_STAT, 5, BD96801_LDO_OCPH_STAT_MASK),
+ REGMAP_IRQ_REG(BD96801_LDO5_OVD_STAT, 5, BD96801_LDO_OVD_STAT_MASK),
+ REGMAP_IRQ_REG(BD96801_LDO5_UVD_STAT, 5, BD96801_LDO_UVD_STAT_MASK),
+ /* LDO6 INTB */
+ REGMAP_IRQ_REG(BD96801_LDO6_OCPH_STAT, 6, BD96801_LDO_OCPH_STAT_MASK),
+ REGMAP_IRQ_REG(BD96801_LDO6_OVD_STAT, 6, BD96801_LDO_OVD_STAT_MASK),
+ REGMAP_IRQ_REG(BD96801_LDO6_UVD_STAT, 6, BD96801_LDO_UVD_STAT_MASK),
+ /* LDO7 INTB */
+ REGMAP_IRQ_REG(BD96801_LDO7_OCPH_STAT, 7, BD96801_LDO_OCPH_STAT_MASK),
+ REGMAP_IRQ_REG(BD96801_LDO7_OVD_STAT, 7, BD96801_LDO_OVD_STAT_MASK),
+ REGMAP_IRQ_REG(BD96801_LDO7_UVD_STAT, 7, BD96801_LDO_UVD_STAT_MASK),
+};
+
+static struct regmap_irq_chip bd96801_irq_chip_intb = {
+ .name = "bd96801-irq-intb",
+ .main_status = BD96801_REG_INT_MAIN,
+ .num_main_regs = 1,
+ .irqs = &bd96801_intb_irqs[0],
+ .num_irqs = ARRAY_SIZE(bd96801_intb_irqs),
+ .status_base = BD96801_REG_INT_SYS_INTB,
+ .mask_base = BD96801_REG_MASK_SYS_INTB,
+ .ack_base = BD96801_REG_INT_SYS_INTB,
+ .init_ack_masked = true,
+ .num_regs = 8,
+ .irq_reg_stride = 1,
+};
+
+static const struct regmap_config bd96801_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .volatile_table = &volatile_regs,
+ .cache_type = REGCACHE_RBTREE,
+};
+
+static int bd96801_i2c_probe(struct i2c_client *i2c)
+{
+ struct regmap_irq_chip_data *intb_irq_data;
+ const struct fwnode_handle *fwnode;
+ struct irq_domain *intb_domain;
+ struct regmap *regmap;
+ int ret, intb_irq;
+
+ fwnode = dev_fwnode(&i2c->dev);
+ if (!fwnode)
+ return dev_err_probe(&i2c->dev, -EINVAL, "Failed to find fwnode\n");
+
+ intb_irq = fwnode_irq_get_byname(fwnode, "intb");
+ if (intb_irq < 0)
+ return dev_err_probe(&i2c->dev, intb_irq, "INTB IRQ not configured\n");
+
+ regmap = devm_regmap_init_i2c(i2c, &bd96801_regmap_config);
+ if (IS_ERR(regmap))
+ return dev_err_probe(&i2c->dev, PTR_ERR(regmap),
+ "Regmap initialization failed\n");
+
+ ret = regmap_write(regmap, BD96801_LOCK_REG, BD96801_UNLOCK);
+ if (ret)
+ return dev_err_probe(&i2c->dev, ret, "Failed to unlock PMIC\n");
+
+ ret = devm_regmap_add_irq_chip(&i2c->dev, regmap, intb_irq,
+ IRQF_ONESHOT, 0, &bd96801_irq_chip_intb,
+ &intb_irq_data);
+ if (ret)
+ return dev_err_probe(&i2c->dev, ret, "Failed to add INTB IRQ chip\n");
+
+ intb_domain = regmap_irq_get_domain(intb_irq_data);
+
+ ret = devm_mfd_add_devices(&i2c->dev, PLATFORM_DEVID_AUTO,
+ bd96801_mfd_cells,
+ ARRAY_SIZE(bd96801_mfd_cells), NULL, 0,
+ intb_domain);
+
+ if (ret)
+ dev_err(&i2c->dev, "Failed to create subdevices\n");
+
+ return ret;
+}
+
+static const struct of_device_id bd96801_of_match[] = {
+ { .compatible = "rohm,bd96801", },
+ { }
+};
+MODULE_DEVICE_TABLE(of, bd96801_of_match);
+
+static struct i2c_driver bd96801_i2c_driver = {
+ .driver = {
+ .name = "rohm-bd96801",
+ .of_match_table = bd96801_of_match,
+ },
+ .probe = bd96801_i2c_probe,
+};
+
+static int __init bd96801_i2c_init(void)
+{
+ return i2c_add_driver(&bd96801_i2c_driver);
+}
+
+/* Initialise early so consumer devices can complete system boot */
+subsys_initcall(bd96801_i2c_init);
+
+static void __exit bd96801_i2c_exit(void)
+{
+ i2c_del_driver(&bd96801_i2c_driver);
+}
+module_exit(bd96801_i2c_exit);
+
+MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@xxxxxxxxxxxxxxxxx>");
+MODULE_DESCRIPTION("ROHM BD96801 Power Management IC driver");
+MODULE_LICENSE("GPL");
diff --git a/include/linux/mfd/rohm-bd96801.h b/include/linux/mfd/rohm-bd96801.h
new file mode 100644
index 000000000000..e2d9e10b6364
--- /dev/null
+++ b/include/linux/mfd/rohm-bd96801.h
@@ -0,0 +1,215 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/* Copyright (C) 2024 ROHM Semiconductors */
+
+#ifndef __MFD_BD96801_H__
+#define __MFD_BD96801_H__
+
+#define BD96801_REG_SSCG_CTRL 0x09
+#define BD96801_REG_SHD_INTB 0x20
+#define BD96801_LDO5_VOL_LVL_REG 0x2c
+#define BD96801_LDO6_VOL_LVL_REG 0x2d
+#define BD96801_LDO7_VOL_LVL_REG 0x2e
+#define BD96801_REG_BUCK_OVP 0x30
+#define BD96801_REG_BUCK_OVD 0x35
+#define BD96801_REG_LDO_OVP 0x31
+#define BD96801_REG_LDO_OVD 0x36
+#define BD96801_REG_BOOT_OVERTIME 0x3a
+#define BD96801_REG_WD_TMO 0x40
+#define BD96801_REG_WD_CONF 0x41
+#define BD96801_REG_WD_FEED 0x42
+#define BD96801_REG_WD_FAILCOUNT 0x43
+#define BD96801_REG_WD_ASK 0x46
+#define BD96801_REG_WD_STATUS 0x4a
+#define BD96801_REG_PMIC_STATE 0x4f
+#define BD96801_REG_EXT_STATE 0x50
+
+#define BD96801_STATE_STBY 0x09
+
+#define BD96801_LOCK_REG 0x04
+#define BD96801_UNLOCK 0x9d
+#define BD96801_LOCK 0x00
+
+/* IRQ register area */
+#define BD96801_REG_INT_MAIN 0x51
+
+/*
+ * The BD96801 has two physical IRQ lines, INTB and ERRB.
+ *
+ * The 'main status register' is located at 0x51.
+ * The ERRB status registers are located at 0x52 ... 0x5B
+ * INTB status registers are at range 0x5c ... 0x63
+ */
+#define BD96801_REG_INT_SYS_ERRB1 0x52
+#define BD96801_REG_INT_SYS_INTB 0x5c
+#define BD96801_REG_INT_LDO7_INTB 0x63
+
+/* MASK registers */
+#define BD96801_REG_MASK_SYS_INTB 0x73
+#define BD96801_REG_MASK_SYS_ERRB 0x69
+
+#define BD96801_MAX_REGISTER 0x7a
+
+#define BD96801_OTP_ERR_MASK BIT(0)
+#define BD96801_DBIST_ERR_MASK BIT(1)
+#define BD96801_EEP_ERR_MASK BIT(2)
+#define BD96801_ABIST_ERR_MASK BIT(3)
+#define BD96801_PRSTB_ERR_MASK BIT(4)
+#define BD96801_DRMOS1_ERR_MASK BIT(5)
+#define BD96801_DRMOS2_ERR_MASK BIT(6)
+#define BD96801_SLAVE_ERR_MASK BIT(7)
+#define BD96801_VREF_ERR_MASK BIT(0)
+#define BD96801_TSD_ERR_MASK BIT(1)
+#define BD96801_UVLO_ERR_MASK BIT(2)
+#define BD96801_OVLO_ERR_MASK BIT(3)
+#define BD96801_OSC_ERR_MASK BIT(4)
+#define BD96801_PON_ERR_MASK BIT(5)
+#define BD96801_POFF_ERR_MASK BIT(6)
+#define BD96801_CMD_SHDN_ERR_MASK BIT(7)
+#define BD96801_INT_PRSTB_WDT_ERR_MASK BIT(0)
+#define BD96801_INT_CHIP_IF_ERR_MASK BIT(3)
+#define BD96801_INT_SHDN_ERR_MASK BIT(7)
+#define BD96801_OUT_PVIN_ERR_MASK BIT(0)
+#define BD96801_OUT_OVP_ERR_MASK BIT(1)
+#define BD96801_OUT_UVP_ERR_MASK BIT(2)
+#define BD96801_OUT_SHDN_ERR_MASK BIT(7)
+
+/* ERRB IRQs */
+enum {
+ /* Reg 0x52, 0x53, 0x54 - ERRB system IRQs */
+ BD96801_OTP_ERR_STAT,
+ BD96801_DBIST_ERR_STAT,
+ BD96801_EEP_ERR_STAT,
+ BD96801_ABIST_ERR_STAT,
+ BD96801_PRSTB_ERR_STAT,
+ BD96801_DRMOS1_ERR_STAT,
+ BD96801_DRMOS2_ERR_STAT,
+ BD96801_SLAVE_ERR_STAT,
+ BD96801_VREF_ERR_STAT,
+ BD96801_TSD_ERR_STAT,
+ BD96801_UVLO_ERR_STAT,
+ BD96801_OVLO_ERR_STAT,
+ BD96801_OSC_ERR_STAT,
+ BD96801_PON_ERR_STAT,
+ BD96801_POFF_ERR_STAT,
+ BD96801_CMD_SHDN_ERR_STAT,
+ BD96801_INT_PRSTB_WDT_ERR,
+ BD96801_INT_CHIP_IF_ERR,
+ BD96801_INT_SHDN_ERR_STAT,
+
+ /* Reg 0x55 BUCK1 ERR IRQs */
+ BD96801_BUCK1_PVIN_ERR_STAT,
+ BD96801_BUCK1_OVP_ERR_STAT,
+ BD96801_BUCK1_UVP_ERR_STAT,
+ BD96801_BUCK1_SHDN_ERR_STAT,
+
+ /* Reg 0x56 BUCK2 ERR IRQs */
+ BD96801_BUCK2_PVIN_ERR_STAT,
+ BD96801_BUCK2_OVP_ERR_STAT,
+ BD96801_BUCK2_UVP_ERR_STAT,
+ BD96801_BUCK2_SHDN_ERR_STAT,
+
+ /* Reg 0x57 BUCK3 ERR IRQs */
+ BD96801_BUCK3_PVIN_ERR_STAT,
+ BD96801_BUCK3_OVP_ERR_STAT,
+ BD96801_BUCK3_UVP_ERR_STAT,
+ BD96801_BUCK3_SHDN_ERR_STAT,
+
+ /* Reg 0x58 BUCK4 ERR IRQs */
+ BD96801_BUCK4_PVIN_ERR_STAT,
+ BD96801_BUCK4_OVP_ERR_STAT,
+ BD96801_BUCK4_UVP_ERR_STAT,
+ BD96801_BUCK4_SHDN_ERR_STAT,
+
+ /* Reg 0x59 LDO5 ERR IRQs */
+ BD96801_LDO5_PVIN_ERR_STAT,
+ BD96801_LDO5_OVP_ERR_STAT,
+ BD96801_LDO5_UVP_ERR_STAT,
+ BD96801_LDO5_SHDN_ERR_STAT,
+
+ /* Reg 0x5a LDO6 ERR IRQs */
+ BD96801_LDO6_PVIN_ERR_STAT,
+ BD96801_LDO6_OVP_ERR_STAT,
+ BD96801_LDO6_UVP_ERR_STAT,
+ BD96801_LDO6_SHDN_ERR_STAT,
+
+ /* Reg 0x5b LDO7 ERR IRQs */
+ BD96801_LDO7_PVIN_ERR_STAT,
+ BD96801_LDO7_OVP_ERR_STAT,
+ BD96801_LDO7_UVP_ERR_STAT,
+ BD96801_LDO7_SHDN_ERR_STAT,
+};
+
+/* INTB IRQs */
+enum {
+ /* Reg 0x5c (System INTB) */
+ BD96801_TW_STAT,
+ BD96801_WDT_ERR_STAT,
+ BD96801_I2C_ERR_STAT,
+ BD96801_CHIP_IF_ERR_STAT,
+
+ /* Reg 0x5d (BUCK1 INTB) */
+ BD96801_BUCK1_OCPH_STAT,
+ BD96801_BUCK1_OCPL_STAT,
+ BD96801_BUCK1_OCPN_STAT,
+ BD96801_BUCK1_OVD_STAT,
+ BD96801_BUCK1_UVD_STAT,
+ BD96801_BUCK1_TW_CH_STAT,
+
+ /* Reg 0x5e (BUCK2 INTB) */
+ BD96801_BUCK2_OCPH_STAT,
+ BD96801_BUCK2_OCPL_STAT,
+ BD96801_BUCK2_OCPN_STAT,
+ BD96801_BUCK2_OVD_STAT,
+ BD96801_BUCK2_UVD_STAT,
+ BD96801_BUCK2_TW_CH_STAT,
+
+ /* Reg 0x5f (BUCK3 INTB)*/
+ BD96801_BUCK3_OCPH_STAT,
+ BD96801_BUCK3_OCPL_STAT,
+ BD96801_BUCK3_OCPN_STAT,
+ BD96801_BUCK3_OVD_STAT,
+ BD96801_BUCK3_UVD_STAT,
+ BD96801_BUCK3_TW_CH_STAT,
+
+ /* Reg 0x60 (BUCK4 INTB)*/
+ BD96801_BUCK4_OCPH_STAT,
+ BD96801_BUCK4_OCPL_STAT,
+ BD96801_BUCK4_OCPN_STAT,
+ BD96801_BUCK4_OVD_STAT,
+ BD96801_BUCK4_UVD_STAT,
+ BD96801_BUCK4_TW_CH_STAT,
+
+ /* Reg 0x61 (LDO5 INTB) */
+ BD96801_LDO5_OCPH_STAT, /* bit [0] */
+ BD96801_LDO5_OVD_STAT, /* bit [3] */
+ BD96801_LDO5_UVD_STAT, /* bit [4] */
+
+ /* Reg 0x62 (LDO6 INTB) */
+ BD96801_LDO6_OCPH_STAT, /* bit [0] */
+ BD96801_LDO6_OVD_STAT, /* bit [3] */
+ BD96801_LDO6_UVD_STAT, /* bit [4] */
+
+ /* Reg 0x63 (LDO7 INTB) */
+ BD96801_LDO7_OCPH_STAT, /* bit [0] */
+ BD96801_LDO7_OVD_STAT, /* bit [3] */
+ BD96801_LDO7_UVD_STAT, /* bit [4] */
+};
+
+/* IRQ MASKs */
+#define BD96801_TW_STAT_MASK BIT(0)
+#define BD96801_WDT_ERR_STAT_MASK BIT(1)
+#define BD96801_I2C_ERR_STAT_MASK BIT(2)
+#define BD96801_CHIP_IF_ERR_STAT_MASK BIT(3)
+
+#define BD96801_BUCK_OCPH_STAT_MASK BIT(0)
+#define BD96801_BUCK_OCPL_STAT_MASK BIT(1)
+#define BD96801_BUCK_OCPN_STAT_MASK BIT(2)
+#define BD96801_BUCK_OVD_STAT_MASK BIT(3)
+#define BD96801_BUCK_UVD_STAT_MASK BIT(4)
+#define BD96801_BUCK_TW_CH_STAT_MASK BIT(5)
+
+#define BD96801_LDO_OCPH_STAT_MASK BIT(0)
+#define BD96801_LDO_OVD_STAT_MASK BIT(3)
+#define BD96801_LDO_UVD_STAT_MASK BIT(4)
+
+#endif
diff --git a/include/linux/mfd/rohm-generic.h b/include/linux/mfd/rohm-generic.h
index 4eeb22876bad..e7d4e6afe388 100644
--- a/include/linux/mfd/rohm-generic.h
+++ b/include/linux/mfd/rohm-generic.h
@@ -16,6 +16,7 @@ enum rohm_chip_type {
ROHM_CHIP_TYPE_BD71828,
ROHM_CHIP_TYPE_BD71837,
ROHM_CHIP_TYPE_BD71847,
+ ROHM_CHIP_TYPE_BD96801,
ROHM_CHIP_TYPE_AMOUNT
};

--
2.45.1

--
Matti Vaittinen, Linux device drivers
ROHM Semiconductors, Finland SWDC
Kiviharjunlenkki 1E
90220 OULU
FINLAND

~~~ "I don't think so," said Rene Descartes. Just then he vanished ~~~
Simon says - in Latin please.
~~~ "non cogito me" dixit Rene Descarte, deinde evanescavit ~~~
Thanks to Simon Glass for the translation =]

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