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linux/drivers/mfd/rohm-bd96801.c
Matti Vaittinen 894d915d23 mfd: bd96801: Add ERRB IRQ 
The ROHM BD96801 "scalable PMIC" provides two physical IRQs. The ERRB
handling can in many cases be omitted because it is used to inform fatal
IRQs, which usually kill the power from the SOC.

There may however be use-cases where the SOC has a 'back-up' emergency
power source which allows some very short time of operation to try to
gracefully shut down sensitive hardware. Furthermore, it is possible the
processor controlling the PMIC is not powered by the PMIC. In such cases
handling the ERRB IRQs may be beneficial.

Add support for ERRB IRQs.

Signed-off-by: Matti Vaittinen <mazziesaccount@gmail.com>
Link: https://lore.kernel.org/r/dda4464443fba81f79d5f8d73947dbd63083cff2.1727931468.git.mazziesaccount@gmail.com
Signed-off-by: Lee Jones <lee@kernel.org>
2024-10-16 09:04:11 +01:00

481 lines
21 KiB
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// 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 configurations which should
* be done when the PMIC is in STBY mode.
*
* 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 STBY state configurations can have a look at the
* original RFC:
* https://lore.kernel.org/all/cover.1712920132.git.mazziesaccount@gmail.com/
* which implements 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 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_errb_irqs[] = {
DEFINE_RES_IRQ_NAMED(BD96801_OTP_ERR_STAT, "bd96801-otp-err"),
DEFINE_RES_IRQ_NAMED(BD96801_DBIST_ERR_STAT, "bd96801-dbist-err"),
DEFINE_RES_IRQ_NAMED(BD96801_EEP_ERR_STAT, "bd96801-eep-err"),
DEFINE_RES_IRQ_NAMED(BD96801_ABIST_ERR_STAT, "bd96801-abist-err"),
DEFINE_RES_IRQ_NAMED(BD96801_PRSTB_ERR_STAT, "bd96801-prstb-err"),
DEFINE_RES_IRQ_NAMED(BD96801_DRMOS1_ERR_STAT, "bd96801-drmoserr1"),
DEFINE_RES_IRQ_NAMED(BD96801_DRMOS2_ERR_STAT, "bd96801-drmoserr2"),
DEFINE_RES_IRQ_NAMED(BD96801_SLAVE_ERR_STAT, "bd96801-slave-err"),
DEFINE_RES_IRQ_NAMED(BD96801_VREF_ERR_STAT, "bd96801-vref-err"),
DEFINE_RES_IRQ_NAMED(BD96801_TSD_ERR_STAT, "bd96801-tsd"),
DEFINE_RES_IRQ_NAMED(BD96801_UVLO_ERR_STAT, "bd96801-uvlo-err"),
DEFINE_RES_IRQ_NAMED(BD96801_OVLO_ERR_STAT, "bd96801-ovlo-err"),
DEFINE_RES_IRQ_NAMED(BD96801_OSC_ERR_STAT, "bd96801-osc-err"),
DEFINE_RES_IRQ_NAMED(BD96801_PON_ERR_STAT, "bd96801-pon-err"),
DEFINE_RES_IRQ_NAMED(BD96801_POFF_ERR_STAT, "bd96801-poff-err"),
DEFINE_RES_IRQ_NAMED(BD96801_CMD_SHDN_ERR_STAT, "bd96801-cmd-shdn-err"),
DEFINE_RES_IRQ_NAMED(BD96801_INT_PRSTB_WDT_ERR, "bd96801-prstb-wdt-err"),
DEFINE_RES_IRQ_NAMED(BD96801_INT_CHIP_IF_ERR, "bd96801-chip-if-err"),
DEFINE_RES_IRQ_NAMED(BD96801_INT_SHDN_ERR_STAT, "bd96801-int-shdn-err"),
DEFINE_RES_IRQ_NAMED(BD96801_BUCK1_PVIN_ERR_STAT, "bd96801-buck1-pvin-err"),
DEFINE_RES_IRQ_NAMED(BD96801_BUCK1_OVP_ERR_STAT, "bd96801-buck1-ovp-err"),
DEFINE_RES_IRQ_NAMED(BD96801_BUCK1_UVP_ERR_STAT, "bd96801-buck1-uvp-err"),
DEFINE_RES_IRQ_NAMED(BD96801_BUCK1_SHDN_ERR_STAT, "bd96801-buck1-shdn-err"),
DEFINE_RES_IRQ_NAMED(BD96801_BUCK2_PVIN_ERR_STAT, "bd96801-buck2-pvin-err"),
DEFINE_RES_IRQ_NAMED(BD96801_BUCK2_OVP_ERR_STAT, "bd96801-buck2-ovp-err"),
DEFINE_RES_IRQ_NAMED(BD96801_BUCK2_UVP_ERR_STAT, "bd96801-buck2-uvp-err"),
DEFINE_RES_IRQ_NAMED(BD96801_BUCK2_SHDN_ERR_STAT, "bd96801-buck2-shdn-err"),
DEFINE_RES_IRQ_NAMED(BD96801_BUCK3_PVIN_ERR_STAT, "bd96801-buck3-pvin-err"),
DEFINE_RES_IRQ_NAMED(BD96801_BUCK3_OVP_ERR_STAT, "bd96801-buck3-ovp-err"),
DEFINE_RES_IRQ_NAMED(BD96801_BUCK3_UVP_ERR_STAT, "bd96801-buck3-uvp-err"),
DEFINE_RES_IRQ_NAMED(BD96801_BUCK3_SHDN_ERR_STAT, "bd96801-buck3-shdn-err"),
DEFINE_RES_IRQ_NAMED(BD96801_BUCK4_PVIN_ERR_STAT, "bd96801-buck4-pvin-err"),
DEFINE_RES_IRQ_NAMED(BD96801_BUCK4_OVP_ERR_STAT, "bd96801-buck4-ovp-err"),
DEFINE_RES_IRQ_NAMED(BD96801_BUCK4_UVP_ERR_STAT, "bd96801-buck4-uvp-err"),
DEFINE_RES_IRQ_NAMED(BD96801_BUCK4_SHDN_ERR_STAT, "bd96801-buck4-shdn-err"),
DEFINE_RES_IRQ_NAMED(BD96801_LDO5_PVIN_ERR_STAT, "bd96801-ldo5-pvin-err"),
DEFINE_RES_IRQ_NAMED(BD96801_LDO5_OVP_ERR_STAT, "bd96801-ldo5-ovp-err"),
DEFINE_RES_IRQ_NAMED(BD96801_LDO5_UVP_ERR_STAT, "bd96801-ldo5-uvp-err"),
DEFINE_RES_IRQ_NAMED(BD96801_LDO5_SHDN_ERR_STAT, "bd96801-ldo5-shdn-err"),
DEFINE_RES_IRQ_NAMED(BD96801_LDO6_PVIN_ERR_STAT, "bd96801-ldo6-pvin-err"),
DEFINE_RES_IRQ_NAMED(BD96801_LDO6_OVP_ERR_STAT, "bd96801-ldo6-ovp-err"),
DEFINE_RES_IRQ_NAMED(BD96801_LDO6_UVP_ERR_STAT, "bd96801-ldo6-uvp-err"),
DEFINE_RES_IRQ_NAMED(BD96801_LDO6_SHDN_ERR_STAT, "bd96801-ldo6-shdn-err"),
DEFINE_RES_IRQ_NAMED(BD96801_LDO7_PVIN_ERR_STAT, "bd96801-ldo7-pvin-err"),
DEFINE_RES_IRQ_NAMED(BD96801_LDO7_OVP_ERR_STAT, "bd96801-ldo7-ovp-err"),
DEFINE_RES_IRQ_NAMED(BD96801_LDO7_UVP_ERR_STAT, "bd96801-ldo7-uvp-err"),
DEFINE_RES_IRQ_NAMED(BD96801_LDO7_SHDN_ERR_STAT, "bd96801-ldo7-shdn-err"),
};
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"),
};
enum {
WDG_CELL = 0,
REGULATOR_CELL,
};
static struct mfd_cell bd96801_cells[] = {
[WDG_CELL] = { .name = "bd96801-wdt", },
[REGULATOR_CELL] = { .name = "bd96801-regulator", },
};
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),
};
/*
* For ERRB we need main register bit mapping as bit(0) indicates active IRQ
* in one of the first 3 sub IRQ registers, For INTB we can use default 1 to 1
* mapping.
*/
static unsigned int bit0_offsets[] = {0, 1, 2}; /* System stat, 3 registers */
static unsigned int bit1_offsets[] = {3}; /* Buck 1 stat */
static unsigned int bit2_offsets[] = {4}; /* Buck 2 stat */
static unsigned int bit3_offsets[] = {5}; /* Buck 3 stat */
static unsigned int bit4_offsets[] = {6}; /* Buck 4 stat */
static unsigned int bit5_offsets[] = {7}; /* LDO 5 stat */
static unsigned int bit6_offsets[] = {8}; /* LDO 6 stat */
static unsigned int bit7_offsets[] = {9}; /* LDO 7 stat */
static const struct regmap_irq_sub_irq_map errb_sub_irq_offsets[] = {
REGMAP_IRQ_MAIN_REG_OFFSET(bit0_offsets),
REGMAP_IRQ_MAIN_REG_OFFSET(bit1_offsets),
REGMAP_IRQ_MAIN_REG_OFFSET(bit2_offsets),
REGMAP_IRQ_MAIN_REG_OFFSET(bit3_offsets),
REGMAP_IRQ_MAIN_REG_OFFSET(bit4_offsets),
REGMAP_IRQ_MAIN_REG_OFFSET(bit5_offsets),
REGMAP_IRQ_MAIN_REG_OFFSET(bit6_offsets),
REGMAP_IRQ_MAIN_REG_OFFSET(bit7_offsets),
};
static const struct regmap_irq bd96801_errb_irqs[] = {
/* Reg 0x52 Fatal ERRB1 */
REGMAP_IRQ_REG(BD96801_OTP_ERR_STAT, 0, BD96801_OTP_ERR_MASK),
REGMAP_IRQ_REG(BD96801_DBIST_ERR_STAT, 0, BD96801_DBIST_ERR_MASK),
REGMAP_IRQ_REG(BD96801_EEP_ERR_STAT, 0, BD96801_EEP_ERR_MASK),
REGMAP_IRQ_REG(BD96801_ABIST_ERR_STAT, 0, BD96801_ABIST_ERR_MASK),
REGMAP_IRQ_REG(BD96801_PRSTB_ERR_STAT, 0, BD96801_PRSTB_ERR_MASK),
REGMAP_IRQ_REG(BD96801_DRMOS1_ERR_STAT, 0, BD96801_DRMOS1_ERR_MASK),
REGMAP_IRQ_REG(BD96801_DRMOS2_ERR_STAT, 0, BD96801_DRMOS2_ERR_MASK),
REGMAP_IRQ_REG(BD96801_SLAVE_ERR_STAT, 0, BD96801_SLAVE_ERR_MASK),
/* 0x53 Fatal ERRB2 */
REGMAP_IRQ_REG(BD96801_VREF_ERR_STAT, 1, BD96801_VREF_ERR_MASK),
REGMAP_IRQ_REG(BD96801_TSD_ERR_STAT, 1, BD96801_TSD_ERR_MASK),
REGMAP_IRQ_REG(BD96801_UVLO_ERR_STAT, 1, BD96801_UVLO_ERR_MASK),
REGMAP_IRQ_REG(BD96801_OVLO_ERR_STAT, 1, BD96801_OVLO_ERR_MASK),
REGMAP_IRQ_REG(BD96801_OSC_ERR_STAT, 1, BD96801_OSC_ERR_MASK),
REGMAP_IRQ_REG(BD96801_PON_ERR_STAT, 1, BD96801_PON_ERR_MASK),
REGMAP_IRQ_REG(BD96801_POFF_ERR_STAT, 1, BD96801_POFF_ERR_MASK),
REGMAP_IRQ_REG(BD96801_CMD_SHDN_ERR_STAT, 1, BD96801_CMD_SHDN_ERR_MASK),
/* 0x54 Fatal INTB shadowed to ERRB */
REGMAP_IRQ_REG(BD96801_INT_PRSTB_WDT_ERR, 2, BD96801_INT_PRSTB_WDT_ERR_MASK),
REGMAP_IRQ_REG(BD96801_INT_CHIP_IF_ERR, 2, BD96801_INT_CHIP_IF_ERR_MASK),
REGMAP_IRQ_REG(BD96801_INT_SHDN_ERR_STAT, 2, BD96801_INT_SHDN_ERR_MASK),
/* Reg 0x55 BUCK1 ERR IRQs */
REGMAP_IRQ_REG(BD96801_BUCK1_PVIN_ERR_STAT, 3, BD96801_OUT_PVIN_ERR_MASK),
REGMAP_IRQ_REG(BD96801_BUCK1_OVP_ERR_STAT, 3, BD96801_OUT_OVP_ERR_MASK),
REGMAP_IRQ_REG(BD96801_BUCK1_UVP_ERR_STAT, 3, BD96801_OUT_UVP_ERR_MASK),
REGMAP_IRQ_REG(BD96801_BUCK1_SHDN_ERR_STAT, 3, BD96801_OUT_SHDN_ERR_MASK),
/* Reg 0x56 BUCK2 ERR IRQs */
REGMAP_IRQ_REG(BD96801_BUCK2_PVIN_ERR_STAT, 4, BD96801_OUT_PVIN_ERR_MASK),
REGMAP_IRQ_REG(BD96801_BUCK2_OVP_ERR_STAT, 4, BD96801_OUT_OVP_ERR_MASK),
REGMAP_IRQ_REG(BD96801_BUCK2_UVP_ERR_STAT, 4, BD96801_OUT_UVP_ERR_MASK),
REGMAP_IRQ_REG(BD96801_BUCK2_SHDN_ERR_STAT, 4, BD96801_OUT_SHDN_ERR_MASK),
/* Reg 0x57 BUCK3 ERR IRQs */
REGMAP_IRQ_REG(BD96801_BUCK3_PVIN_ERR_STAT, 5, BD96801_OUT_PVIN_ERR_MASK),
REGMAP_IRQ_REG(BD96801_BUCK3_OVP_ERR_STAT, 5, BD96801_OUT_OVP_ERR_MASK),
REGMAP_IRQ_REG(BD96801_BUCK3_UVP_ERR_STAT, 5, BD96801_OUT_UVP_ERR_MASK),
REGMAP_IRQ_REG(BD96801_BUCK3_SHDN_ERR_STAT, 5, BD96801_OUT_SHDN_ERR_MASK),
/* Reg 0x58 BUCK4 ERR IRQs */
REGMAP_IRQ_REG(BD96801_BUCK4_PVIN_ERR_STAT, 6, BD96801_OUT_PVIN_ERR_MASK),
REGMAP_IRQ_REG(BD96801_BUCK4_OVP_ERR_STAT, 6, BD96801_OUT_OVP_ERR_MASK),
REGMAP_IRQ_REG(BD96801_BUCK4_UVP_ERR_STAT, 6, BD96801_OUT_UVP_ERR_MASK),
REGMAP_IRQ_REG(BD96801_BUCK4_SHDN_ERR_STAT, 6, BD96801_OUT_SHDN_ERR_MASK),
/* Reg 0x59 LDO5 ERR IRQs */
REGMAP_IRQ_REG(BD96801_LDO5_PVIN_ERR_STAT, 7, BD96801_OUT_PVIN_ERR_MASK),
REGMAP_IRQ_REG(BD96801_LDO5_OVP_ERR_STAT, 7, BD96801_OUT_OVP_ERR_MASK),
REGMAP_IRQ_REG(BD96801_LDO5_UVP_ERR_STAT, 7, BD96801_OUT_UVP_ERR_MASK),
REGMAP_IRQ_REG(BD96801_LDO5_SHDN_ERR_STAT, 7, BD96801_OUT_SHDN_ERR_MASK),
/* Reg 0x5a LDO6 ERR IRQs */
REGMAP_IRQ_REG(BD96801_LDO6_PVIN_ERR_STAT, 8, BD96801_OUT_PVIN_ERR_MASK),
REGMAP_IRQ_REG(BD96801_LDO6_OVP_ERR_STAT, 8, BD96801_OUT_OVP_ERR_MASK),
REGMAP_IRQ_REG(BD96801_LDO6_UVP_ERR_STAT, 8, BD96801_OUT_UVP_ERR_MASK),
REGMAP_IRQ_REG(BD96801_LDO6_SHDN_ERR_STAT, 8, BD96801_OUT_SHDN_ERR_MASK),
/* Reg 0x5b LDO7 ERR IRQs */
REGMAP_IRQ_REG(BD96801_LDO7_PVIN_ERR_STAT, 9, BD96801_OUT_PVIN_ERR_MASK),
REGMAP_IRQ_REG(BD96801_LDO7_OVP_ERR_STAT, 9, BD96801_OUT_OVP_ERR_MASK),
REGMAP_IRQ_REG(BD96801_LDO7_UVP_ERR_STAT, 9, BD96801_OUT_UVP_ERR_MASK),
REGMAP_IRQ_REG(BD96801_LDO7_SHDN_ERR_STAT, 9, BD96801_OUT_SHDN_ERR_MASK),
};
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 const struct regmap_irq_chip bd96801_irq_chip_errb = {
.name = "bd96801-irq-errb",
.domain_suffix = "errb",
.main_status = BD96801_REG_INT_MAIN,
.num_main_regs = 1,
.irqs = &bd96801_errb_irqs[0],
.num_irqs = ARRAY_SIZE(bd96801_errb_irqs),
.status_base = BD96801_REG_INT_SYS_ERRB1,
.mask_base = BD96801_REG_MASK_SYS_ERRB,
.ack_base = BD96801_REG_INT_SYS_ERRB1,
.init_ack_masked = true,
.num_regs = 10,
.irq_reg_stride = 1,
.sub_reg_offsets = &errb_sub_irq_offsets[0],
};
static const struct regmap_irq_chip bd96801_irq_chip_intb = {
.name = "bd96801-irq-intb",
.domain_suffix = "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_MAPLE,
};
static int bd96801_i2c_probe(struct i2c_client *i2c)
{
struct regmap_irq_chip_data *intb_irq_data, *errb_irq_data;
struct irq_domain *intb_domain, *errb_domain;
const struct fwnode_handle *fwnode;
struct resource *regulator_res;
struct resource wdg_irq;
struct regmap *regmap;
int intb_irq, errb_irq, num_intb, num_errb = 0;
int num_regu_irqs, wdg_irq_no;
int i, ret;
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");
num_intb = ARRAY_SIZE(regulator_intb_irqs);
/* ERRB may be omitted if processor is powered by the PMIC */
errb_irq = fwnode_irq_get_byname(fwnode, "errb");
if (errb_irq < 0)
errb_irq = 0;
if (errb_irq)
num_errb = ARRAY_SIZE(regulator_errb_irqs);
num_regu_irqs = num_intb + num_errb;
regulator_res = devm_kcalloc(&i2c->dev, num_regu_irqs,
sizeof(*regulator_res), GFP_KERNEL);
if (!regulator_res)
return -ENOMEM;
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);
/*
* MFD core code is built to handle only one IRQ domain. BD96801
* has two domains so we do IRQ mapping here and provide the
* already mapped IRQ numbers to sub-devices.
*/
for (i = 0; i < num_intb; i++) {
struct resource *res = &regulator_res[i];
*res = regulator_intb_irqs[i];
res->start = res->end = irq_create_mapping(intb_domain,
res->start);
}
wdg_irq_no = irq_create_mapping(intb_domain, BD96801_WDT_ERR_STAT);
wdg_irq = DEFINE_RES_IRQ_NAMED(wdg_irq_no, "bd96801-wdg");
bd96801_cells[WDG_CELL].resources = &wdg_irq;
bd96801_cells[WDG_CELL].num_resources = 1;
if (!num_errb)
goto skip_errb;
ret = devm_regmap_add_irq_chip(&i2c->dev, regmap, errb_irq, IRQF_ONESHOT,
0, &bd96801_irq_chip_errb, &errb_irq_data);
if (ret)
return dev_err_probe(&i2c->dev, ret,
"Failed to add ERRB IRQ chip\n");
errb_domain = regmap_irq_get_domain(errb_irq_data);
for (i = 0; i < num_errb; i++) {
struct resource *res = &regulator_res[num_intb + i];
*res = regulator_errb_irqs[i];
res->start = res->end = irq_create_mapping(errb_domain, res->start);
}
skip_errb:
bd96801_cells[REGULATOR_CELL].resources = regulator_res;
bd96801_cells[REGULATOR_CELL].num_resources = num_regu_irqs;
ret = devm_mfd_add_devices(&i2c->dev, PLATFORM_DEVID_AUTO, bd96801_cells,
ARRAY_SIZE(bd96801_cells), NULL, 0, NULL);
if (ret)
dev_err_probe(&i2c->dev, ret, "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@fi.rohmeurope.com>");
MODULE_DESCRIPTION("ROHM BD96801 Power Management IC driver");
MODULE_LICENSE("GPL");
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