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Subject[PATCH v6 04/10] mfd: bd70528: Support ROHM bd70528 PMIC - core
ROHM BD70528MWV is an ultra-low quiescent current general
purpose single-chip power management IC for battery-powered
portable devices.

Add MFD core which enables chip access for following subdevices:
- regulators/LED drivers
- battery-charger
- gpios
- 32.768kHz clk
- RTC
- watchdog

Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
---
drivers/mfd/Kconfig | 17 ++
drivers/mfd/Makefile | 1 +
drivers/mfd/rohm-bd70528.c | 410 +++++++++++++++++++++++++++++++++++++++
include/linux/mfd/rohm-bd70528.h | 392 +++++++++++++++++++++++++++++++++++++
4 files changed, 820 insertions(+)
create mode 100644 drivers/mfd/rohm-bd70528.c
create mode 100644 include/linux/mfd/rohm-bd70528.h

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index f461460a2aeb..f1a0574cebb1 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -1847,6 +1847,23 @@ config MFD_ROHM_BD718XX
NXP i.MX8. It contains 8 BUCK outputs and 7 LDOs, voltage monitoring
and emergency shut down as well as 32,768KHz clock output.

+config MFD_ROHM_BD70528
+ tristate "ROHM BD70528 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 BD70528 Power
+ Management IC. BD71837 is general purpose single-chip power
+ management IC for battery-powered portable devices. It contains
+ 3 ultra-low current consumption buck converters, 3 LDOs and 2 LED
+ Drivers. Also included are 4 GPIOs, a real-time clock (RTC), a 32kHz
+ crystal oscillator, high-accuracy VREF for use with an external ADC,
+ 10 bits SAR ADC for battery temperature monitor and 1S battery
+ charger.
+
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 12980a4ad460..fc9b1408e39b 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -241,4 +241,5 @@ obj-$(CONFIG_MFD_MXS_LRADC) += mxs-lradc.o
obj-$(CONFIG_MFD_SC27XX_PMIC) += sprd-sc27xx-spi.o
obj-$(CONFIG_RAVE_SP_CORE) += rave-sp.o
obj-$(CONFIG_MFD_ROHM_BD718XX) += rohm-bd718x7.o
+obj-$(CONFIG_MFD_ROHM_BD70528) += rohm-bd70528.o

diff --git a/drivers/mfd/rohm-bd70528.c b/drivers/mfd/rohm-bd70528.c
new file mode 100644
index 000000000000..580164addeeb
--- /dev/null
+++ b/drivers/mfd/rohm-bd70528.c
@@ -0,0 +1,410 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+//
+// Copyright (C) 2018 ROHM Semiconductors
+//
+// ROHM BD70528 PMIC driver
+
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/rohm-bd70528.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/regmap.h>
+#include <linux/types.h>
+
+#define BD70528_INT_RES(_reg, _name) \
+ { \
+ .start = (_reg), \
+ .end = (_reg), \
+ .name = (_name), \
+ .flags = IORESOURCE_IRQ, \
+ }
+
+static const struct resource rtc_irqs[] = {
+ BD70528_INT_RES(BD70528_INT_RTC_ALARM, "bd70528-rtc-alm"),
+ BD70528_INT_RES(BD70528_INT_ELPS_TIM, "bd70528-elapsed-timer"),
+};
+
+static const struct resource charger_irqs[] = {
+ BD70528_INT_RES(BD70528_INT_BAT_OV_RES, "bd70528-bat-ov-res"),
+ BD70528_INT_RES(BD70528_INT_BAT_OV_DET, "bd70528-bat-ov-det"),
+ BD70528_INT_RES(BD70528_INT_DBAT_DET, "bd70528-bat-dead"),
+ BD70528_INT_RES(BD70528_INT_BATTSD_COLD_RES, "bd70528-bat-warmed"),
+ BD70528_INT_RES(BD70528_INT_BATTSD_COLD_DET, "bd70528-bat-cold"),
+ BD70528_INT_RES(BD70528_INT_BATTSD_HOT_RES, "bd70528-bat-cooled"),
+ BD70528_INT_RES(BD70528_INT_BATTSD_HOT_DET, "bd70528-bat-hot"),
+ BD70528_INT_RES(BD70528_INT_CHG_TSD, "bd70528-chg-tshd"),
+ BD70528_INT_RES(BD70528_INT_BAT_RMV, "bd70528-bat-removed"),
+ BD70528_INT_RES(BD70528_INT_BAT_DET, "bd70528-bat-detected"),
+ BD70528_INT_RES(BD70528_INT_DCIN2_OV_RES, "bd70528-dcin2-ov-res"),
+ BD70528_INT_RES(BD70528_INT_DCIN2_OV_DET, "bd70528-dcin2-ov-det"),
+ BD70528_INT_RES(BD70528_INT_DCIN2_RMV, "bd70528-dcin2-removed"),
+ BD70528_INT_RES(BD70528_INT_DCIN2_DET, "bd70528-dcin2-detected"),
+ BD70528_INT_RES(BD70528_INT_DCIN1_RMV, "bd70528-dcin1-removed"),
+ BD70528_INT_RES(BD70528_INT_DCIN1_DET, "bd70528-dcin1-detected"),
+};
+
+static struct mfd_cell bd70528_mfd_cells[] = {
+ { .name = "bd70528-pmic", },
+ { .name = "bd70528-gpio", },
+ /*
+ * We use BD71837 driver to drive the clk block. Only differences to
+ * BD70528 clock gate are the register address and mask.
+ */
+ { .name = "bd718xx-clk", },
+ { .name = "bd70528-wdt", },
+ {
+ .name = "bd70528-power",
+ .resources = &charger_irqs[0],
+ .num_resources = ARRAY_SIZE(charger_irqs),
+ },
+ {
+ .name = "bd70528-rtc",
+ .resources = &rtc_irqs[0],
+ .num_resources = ARRAY_SIZE(rtc_irqs),
+ },
+};
+
+static const struct regmap_range volatile_ranges[] = {
+ /* IRQ regs */
+ {
+ .range_min = BD70528_REG_INT_MAIN,
+ .range_max = BD70528_REG_INT_OP_FAIL,
+ },
+ /* RTC regs */
+ {
+ .range_min = BD70528_REG_RTC_COUNT_H,
+ .range_max = BD70528_REG_RTC_ALM_REPEAT,
+ },
+ /*
+ * WDT control reg is special. Magic values must be
+ * written to it in order to change the control. Should
+ * not be cached.
+ */
+ {
+ .range_min = BD70528_REG_WDT_CTRL,
+ .range_max = BD70528_REG_WDT_CTRL,
+ },
+ /*
+ * bd70528 contains also few other registers which require
+ * magic sequence to be written in order to update the value.
+ * At least SHIPMODE, HWRESET, WARMRESET,and STANDBY
+ */
+ {
+ .range_min = BD70528_REG_SHIPMODE,
+ .range_max = BD70528_REG_STANDBY,
+ },
+};
+
+static const struct regmap_access_table volatile_regs = {
+ .yes_ranges = &volatile_ranges[0],
+ .n_yes_ranges = ARRAY_SIZE(volatile_ranges),
+};
+
+static struct regmap_config bd70528_regmap = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .volatile_table = &volatile_regs,
+ .max_register = BD70528_MAX_REGISTER,
+ .cache_type = REGCACHE_RBTREE,
+};
+/* bit [0] - Shutdown register */
+unsigned int bit0_offsets[] = {0};
+/* bit [1] - Power failure register */
+unsigned int bit1_offsets[] = {1};
+/* bit [2] - VR FAULT register */
+unsigned int bit2_offsets[] = {2};
+/* bit [3] - PMU register interrupts */
+unsigned int bit3_offsets[] = {3};
+/* bit [4] - Charger 1 and Charger 2 registers */
+unsigned int bit4_offsets[] = {4, 5};
+/* bit [5] - RTC register */
+unsigned int bit5_offsets[] = {6};
+/* bit [6] - GPIO register */
+unsigned int bit6_offsets[] = {7};
+/* bit [7] - Invalid operation register */
+unsigned int bit7_offsets[] = {8};
+
+static struct regmap_irq_sub_irq_map bd70528_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 struct regmap_irq irqs[] = {
+ REGMAP_IRQ_REG(BD70528_INT_LONGPUSH, 0, BD70528_INT_LONGPUSH_MASK),
+ REGMAP_IRQ_REG(BD70528_INT_WDT, 0, BD70528_INT_WDT_MASK),
+ REGMAP_IRQ_REG(BD70528_INT_HWRESET, 0, BD70528_INT_HWRESET_MASK),
+ REGMAP_IRQ_REG(BD70528_INT_RSTB_FAULT, 0, BD70528_INT_RSTB_FAULT_MASK),
+ REGMAP_IRQ_REG(BD70528_INT_VBAT_UVLO, 0, BD70528_INT_VBAT_UVLO_MASK),
+ REGMAP_IRQ_REG(BD70528_INT_TSD, 0, BD70528_INT_TSD_MASK),
+ REGMAP_IRQ_REG(BD70528_INT_RSTIN, 0, BD70528_INT_RSTIN_MASK),
+ REGMAP_IRQ_REG(BD70528_INT_BUCK1_FAULT, 1,
+ BD70528_INT_BUCK1_FAULT_MASK),
+ REGMAP_IRQ_REG(BD70528_INT_BUCK2_FAULT, 1,
+ BD70528_INT_BUCK2_FAULT_MASK),
+ REGMAP_IRQ_REG(BD70528_INT_BUCK3_FAULT, 1,
+ BD70528_INT_BUCK3_FAULT_MASK),
+ REGMAP_IRQ_REG(BD70528_INT_LDO1_FAULT, 1, BD70528_INT_LDO1_FAULT_MASK),
+ REGMAP_IRQ_REG(BD70528_INT_LDO2_FAULT, 1, BD70528_INT_LDO2_FAULT_MASK),
+ REGMAP_IRQ_REG(BD70528_INT_LDO3_FAULT, 1, BD70528_INT_LDO3_FAULT_MASK),
+ REGMAP_IRQ_REG(BD70528_INT_LED1_FAULT, 1, BD70528_INT_LED1_FAULT_MASK),
+ REGMAP_IRQ_REG(BD70528_INT_LED2_FAULT, 1, BD70528_INT_LED2_FAULT_MASK),
+ REGMAP_IRQ_REG(BD70528_INT_BUCK1_OCP, 2, BD70528_INT_BUCK1_OCP_MASK),
+ REGMAP_IRQ_REG(BD70528_INT_BUCK2_OCP, 2, BD70528_INT_BUCK2_OCP_MASK),
+ REGMAP_IRQ_REG(BD70528_INT_BUCK3_OCP, 2, BD70528_INT_BUCK3_OCP_MASK),
+ REGMAP_IRQ_REG(BD70528_INT_LED1_OCP, 2, BD70528_INT_LED1_OCP_MASK),
+ REGMAP_IRQ_REG(BD70528_INT_LED2_OCP, 2, BD70528_INT_LED2_OCP_MASK),
+ REGMAP_IRQ_REG(BD70528_INT_BUCK1_FULLON, 2,
+ BD70528_INT_BUCK1_FULLON_MASK),
+ REGMAP_IRQ_REG(BD70528_INT_BUCK2_FULLON, 2,
+ BD70528_INT_BUCK2_FULLON_MASK),
+ REGMAP_IRQ_REG(BD70528_INT_SHORTPUSH, 3, BD70528_INT_SHORTPUSH_MASK),
+ REGMAP_IRQ_REG(BD70528_INT_AUTO_WAKEUP, 3,
+ BD70528_INT_AUTO_WAKEUP_MASK),
+ REGMAP_IRQ_REG(BD70528_INT_STATE_CHANGE, 3,
+ BD70528_INT_STATE_CHANGE_MASK),
+ REGMAP_IRQ_REG(BD70528_INT_BAT_OV_RES, 4, BD70528_INT_BAT_OV_RES_MASK),
+ REGMAP_IRQ_REG(BD70528_INT_BAT_OV_DET, 4, BD70528_INT_BAT_OV_DET_MASK),
+ REGMAP_IRQ_REG(BD70528_INT_DBAT_DET, 4, BD70528_INT_DBAT_DET_MASK),
+ REGMAP_IRQ_REG(BD70528_INT_BATTSD_COLD_RES, 4,
+ BD70528_INT_BATTSD_COLD_RES_MASK),
+ REGMAP_IRQ_REG(BD70528_INT_BATTSD_COLD_DET, 4,
+ BD70528_INT_BATTSD_COLD_DET_MASK),
+ REGMAP_IRQ_REG(BD70528_INT_BATTSD_HOT_RES, 4,
+ BD70528_INT_BATTSD_HOT_RES_MASK),
+ REGMAP_IRQ_REG(BD70528_INT_BATTSD_HOT_DET, 4,
+ BD70528_INT_BATTSD_HOT_DET_MASK),
+ REGMAP_IRQ_REG(BD70528_INT_CHG_TSD, 4, BD70528_INT_CHG_TSD_MASK),
+ REGMAP_IRQ_REG(BD70528_INT_BAT_RMV, 5, BD70528_INT_BAT_RMV_MASK),
+ REGMAP_IRQ_REG(BD70528_INT_BAT_DET, 5, BD70528_INT_BAT_DET_MASK),
+ REGMAP_IRQ_REG(BD70528_INT_DCIN2_OV_RES, 5,
+ BD70528_INT_DCIN2_OV_RES_MASK),
+ REGMAP_IRQ_REG(BD70528_INT_DCIN2_OV_DET, 5,
+ BD70528_INT_DCIN2_OV_DET_MASK),
+ REGMAP_IRQ_REG(BD70528_INT_DCIN2_RMV, 5, BD70528_INT_DCIN2_RMV_MASK),
+ REGMAP_IRQ_REG(BD70528_INT_DCIN2_DET, 5, BD70528_INT_DCIN2_DET_MASK),
+ REGMAP_IRQ_REG(BD70528_INT_DCIN1_RMV, 5, BD70528_INT_DCIN1_RMV_MASK),
+ REGMAP_IRQ_REG(BD70528_INT_DCIN1_DET, 5, BD70528_INT_DCIN1_DET_MASK),
+ REGMAP_IRQ_REG(BD70528_INT_RTC_ALARM, 6, BD70528_INT_RTC_ALARM_MASK),
+ REGMAP_IRQ_REG(BD70528_INT_ELPS_TIM, 6, BD70528_INT_ELPS_TIM_MASK),
+ REGMAP_IRQ_REG(BD70528_INT_GPIO0, 7, BD70528_INT_GPIO0_MASK),
+ REGMAP_IRQ_REG(BD70528_INT_GPIO1, 7, BD70528_INT_GPIO1_MASK),
+ REGMAP_IRQ_REG(BD70528_INT_GPIO2, 7, BD70528_INT_GPIO2_MASK),
+ REGMAP_IRQ_REG(BD70528_INT_GPIO3, 7, BD70528_INT_GPIO3_MASK),
+ REGMAP_IRQ_REG(BD70528_INT_BUCK1_DVS_OPFAIL, 8,
+ BD70528_INT_BUCK1_DVS_OPFAIL_MASK),
+ REGMAP_IRQ_REG(BD70528_INT_BUCK2_DVS_OPFAIL, 8,
+ BD70528_INT_BUCK2_DVS_OPFAIL_MASK),
+ REGMAP_IRQ_REG(BD70528_INT_BUCK3_DVS_OPFAIL, 8,
+ BD70528_INT_BUCK3_DVS_OPFAIL_MASK),
+ REGMAP_IRQ_REG(BD70528_INT_LED1_VOLT_OPFAIL, 8,
+ BD70528_INT_LED1_VOLT_OPFAIL_MASK),
+ REGMAP_IRQ_REG(BD70528_INT_LED2_VOLT_OPFAIL, 8,
+ BD70528_INT_LED2_VOLT_OPFAIL_MASK),
+};
+
+static struct regmap_irq_chip bd70528_irq_chip = {
+ .name = "bd70528_irq",
+ .main_status = BD70528_REG_INT_MAIN,
+ .irqs = &irqs[0],
+ .num_irqs = ARRAY_SIZE(irqs),
+ .status_base = BD70528_REG_INT_SHDN,
+ .mask_base = BD70528_REG_INT_SHDN_MASK,
+ .ack_base = BD70528_REG_INT_SHDN,
+ .type_base = BD70528_REG_GPIO1_IN,
+ .init_ack_masked = true,
+ .num_regs = 9,
+ .num_main_regs = 1,
+ .num_type_reg = 4,
+ .sub_reg_offsets = &bd70528_sub_irq_offsets[0],
+ .num_main_status_bits = 8,
+ .irq_reg_stride = 1,
+};
+
+#define WD_CTRL_MAGIC1 0x55
+#define WD_CTRL_MAGIC2 0xAA
+
+static int bd70528_wdt_set(struct bd70528 *bd70528, int enable, int *old_state)
+{
+ int ret, i;
+ unsigned int tmp;
+ u8 wd_ctrl_arr[3] = { WD_CTRL_MAGIC1, WD_CTRL_MAGIC2, 0 };
+ u8 *wd_ctrl = &wd_ctrl_arr[2];
+
+ ret = regmap_read(bd70528->chip.regmap, BD70528_REG_WDT_CTRL, &tmp);
+ if (ret)
+ return ret;
+
+ *wd_ctrl = (u8)tmp;
+
+ if (old_state) {
+ if (*wd_ctrl & BD70528_MASK_WDT_EN)
+ *old_state |= BD70528_WDT_STATE_BIT;
+ else
+ *old_state &= ~BD70528_WDT_STATE_BIT;
+ if ((!enable) == (!(*old_state & BD70528_WDT_STATE_BIT)))
+ return 0;
+ }
+
+ if (enable) {
+ if (*wd_ctrl & BD70528_MASK_WDT_EN)
+ return 0;
+ *wd_ctrl |= BD70528_MASK_WDT_EN;
+ } else {
+ if (*wd_ctrl & BD70528_MASK_WDT_EN)
+ *wd_ctrl &= ~BD70528_MASK_WDT_EN;
+ else
+ return 0;
+ }
+
+ for (i = 0; i < 3; i++) {
+ ret = regmap_write(bd70528->chip.regmap, BD70528_REG_WDT_CTRL,
+ wd_ctrl_arr[i]);
+ if (ret)
+ return ret;
+ }
+
+ ret = regmap_read(bd70528->chip.regmap, BD70528_REG_WDT_CTRL, &tmp);
+ if ((tmp & BD70528_MASK_WDT_EN) != (*wd_ctrl & BD70528_MASK_WDT_EN)) {
+ dev_err(bd70528->chip.dev,
+ "Watchdog ctrl mismatch (hw) 0x%x (set) 0x%x\n",
+ tmp, *wd_ctrl);
+ ret = -EIO;
+ }
+
+ return ret;
+}
+
+static int bd70528_i2c_probe(struct i2c_client *i2c,
+ const struct i2c_device_id *id)
+{
+ struct bd70528 *bd70528;
+ struct regmap_irq_chip_data *irq_data;
+ int ret, i;
+ struct mutex *rtc_mutex;
+
+ if (!i2c->irq) {
+ dev_err(&i2c->dev, "No IRQ configured\n");
+ return -EINVAL;
+ }
+ bd70528 = devm_kzalloc(&i2c->dev, sizeof(*bd70528), GFP_KERNEL);
+
+ if (!bd70528)
+ return -ENOMEM;
+
+ mutex_init(&bd70528->rtc_timer_lock);
+
+ dev_set_drvdata(&i2c->dev, bd70528);
+ bd70528->chip.chip_type = ROHM_CHIP_TYPE_BD70528;
+ bd70528->wdt_set = bd70528_wdt_set;
+ bd70528->chip.regmap = devm_regmap_init_i2c(i2c, &bd70528_regmap);
+ if (IS_ERR(bd70528->chip.regmap)) {
+ dev_err(&i2c->dev, "regmap initialization failed\n");
+ return PTR_ERR(bd70528->chip.regmap);
+ }
+
+ /*
+ * Disallow type setting for all IRQs by default as
+ * most of them do not support setting type.
+ */
+ for (i = 0; i < ARRAY_SIZE(irqs); i++)
+ irqs[i].type.types_supported = 0;
+
+ irqs[BD70528_INT_GPIO0].type.type_reg_offset = 0;
+ irqs[BD70528_INT_GPIO0].type.type_rising_val = 0x20;
+ irqs[BD70528_INT_GPIO0].type.type_falling_val = 0x10;
+ irqs[BD70528_INT_GPIO0].type.type_level_high_val = 0x40;
+ irqs[BD70528_INT_GPIO0].type.type_level_low_val = 0x50;
+ irqs[BD70528_INT_GPIO0].type.types_supported = (IRQ_TYPE_EDGE_BOTH |
+ IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW);
+ irqs[BD70528_INT_GPIO1].type.type_reg_offset = 2;
+ irqs[BD70528_INT_GPIO1].type.type_rising_val = 0x20;
+ irqs[BD70528_INT_GPIO1].type.type_falling_val = 0x10;
+ irqs[BD70528_INT_GPIO1].type.type_level_high_val = 0x40;
+ irqs[BD70528_INT_GPIO1].type.type_level_low_val = 0x50;
+ irqs[BD70528_INT_GPIO1].type.types_supported = (IRQ_TYPE_EDGE_BOTH |
+ IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW);
+ irqs[BD70528_INT_GPIO2].type.type_reg_offset = 4;
+ irqs[BD70528_INT_GPIO2].type.type_rising_val = 0x20;
+ irqs[BD70528_INT_GPIO2].type.type_falling_val = 0x10;
+ irqs[BD70528_INT_GPIO2].type.type_level_high_val = 0x40;
+ irqs[BD70528_INT_GPIO2].type.type_level_low_val = 0x50;
+ irqs[BD70528_INT_GPIO2].type.types_supported = (IRQ_TYPE_EDGE_BOTH |
+ IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW);
+ irqs[BD70528_INT_GPIO3].type.type_reg_offset = 6;
+ irqs[BD70528_INT_GPIO3].type.type_rising_val = 0x20;
+ irqs[BD70528_INT_GPIO3].type.type_falling_val = 0x10;
+ irqs[BD70528_INT_GPIO3].type.type_level_high_val = 0x40;
+ irqs[BD70528_INT_GPIO3].type.type_level_low_val = 0x50;
+ irqs[BD70528_INT_GPIO3].type.types_supported = (IRQ_TYPE_EDGE_BOTH |
+ IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW);
+
+ ret = devm_regmap_add_irq_chip(&i2c->dev, bd70528->chip.regmap,
+ i2c->irq, IRQF_ONESHOT, 0,
+ &bd70528_irq_chip, &irq_data);
+ if (ret) {
+ dev_err(&i2c->dev, "Failed to add irq_chip\n");
+ return ret;
+ }
+ dev_dbg(&i2c->dev, "Registered %d irqs for chip\n",
+ bd70528_irq_chip.num_irqs);
+
+ /*
+ * BD70528 irq controller is not touching the main mask register.
+ * So enable the GPIO block interrupts at main level. We can just
+ * leave them enabled as irq-controller should disable irqs
+ * from sub-registers when IRQ is disabled or freed.
+ */
+ ret = regmap_update_bits(bd70528->chip.regmap,
+ BD70528_REG_INT_MAIN_MASK,
+ BD70528_INT_GPIO_MASK, 0);
+
+ ret = devm_mfd_add_devices(&i2c->dev, PLATFORM_DEVID_AUTO,
+ bd70528_mfd_cells,
+ ARRAY_SIZE(bd70528_mfd_cells), NULL, 0,
+ regmap_irq_get_domain(irq_data));
+ if (ret)
+ dev_err(&i2c->dev, "Failed to create subdevices\n");
+
+ return ret;
+}
+
+static const struct of_device_id bd70528_of_match[] = {
+ {
+ .compatible = "rohm,bd70528",
+ },
+ { },
+};
+MODULE_DEVICE_TABLE(of, bd70528_of_match);
+
+static struct i2c_driver bd70528_drv = {
+ .driver = {
+ .name = "rohm-bd70528",
+ .of_match_table = bd70528_of_match,
+ },
+ .probe = &bd70528_i2c_probe,
+};
+
+static int __init bd70528_init(void)
+{
+ return i2c_add_driver(&bd70528_drv);
+}
+subsys_initcall(bd70528_init);
+
+static void __exit bd70528_exit(void)
+{
+ i2c_del_driver(&bd70528_drv);
+}
+module_exit(bd70528_exit);
+
+MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>");
+MODULE_DESCRIPTION("ROHM BD70528 Power Management IC driver");
+MODULE_LICENSE("GPL");
diff --git a/include/linux/mfd/rohm-bd70528.h b/include/linux/mfd/rohm-bd70528.h
new file mode 100644
index 000000000000..576b672870b7
--- /dev/null
+++ b/include/linux/mfd/rohm-bd70528.h
@@ -0,0 +1,392 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/* Copyright (C) 2018 ROHM Semiconductors */
+
+#ifndef __LINUX_MFD_BD70528_H__
+#define __LINUX_MFD_BD70528_H__
+
+#include <linux/device.h>
+#include <linux/mfd/rohm-generic.h>
+#include <linux/regmap.h>
+
+struct bd70528 {
+ /*
+ * Please keep this as the first member here as some
+ * drivers (clk) supporting more than one chip may only know this
+ * generic struct 'struct rohm_regmap_dev' and assume it is
+ * the first chunk of parent device's private data.
+ */
+ struct rohm_regmap_dev chip;
+ /* wdt_set must be called rtc_timer_lock held */
+ int (*wdt_set)(struct bd70528 *bd70528, int enable, int *old_state);
+ struct mutex rtc_timer_lock;
+};
+
+enum {
+ BD70528_BUCK1,
+ BD70528_BUCK2,
+ BD70528_BUCK3,
+ BD70528_LDO1,
+ BD70528_LDO2,
+ BD70528_LDO3,
+ BD70528_LED1,
+ BD70528_LED2,
+};
+
+#define BD70528_BUCK_VOLTS 17
+#define BD70528_BUCK_VOLTS 17
+#define BD70528_BUCK_VOLTS 17
+#define BD70528_LDO_VOLTS 0x20
+
+#define BD70528_REG_BUCK1_EN 0x0F
+#define BD70528_REG_BUCK1_VOLT 0x15
+#define BD70528_REG_BUCK2_EN 0x10
+#define BD70528_REG_BUCK2_VOLT 0x16
+#define BD70528_REG_BUCK3_EN 0x11
+#define BD70528_REG_BUCK3_VOLT 0x17
+#define BD70528_REG_LDO1_EN 0x1b
+#define BD70528_REG_LDO1_VOLT 0x1e
+#define BD70528_REG_LDO2_EN 0x1c
+#define BD70528_REG_LDO2_VOLT 0x1f
+#define BD70528_REG_LDO3_EN 0x1d
+#define BD70528_REG_LDO3_VOLT 0x20
+#define BD70528_REG_LED_CTRL 0x2b
+#define BD70528_REG_LED_VOLT 0x29
+#define BD70528_REG_LED_EN 0x2a
+
+/* main irq registers */
+#define BD70528_REG_INT_MAIN 0x7E
+#define BD70528_REG_INT_MAIN_MASK 0x74
+
+/* 'sub irq' registers */
+#define BD70528_REG_INT_SHDN 0x7F
+#define BD70528_REG_INT_PWR_FLT 0x80
+#define BD70528_REG_INT_VR_FLT 0x81
+#define BD70528_REG_INT_MISC 0x82
+#define BD70528_REG_INT_BAT1 0x83
+#define BD70528_REG_INT_BAT2 0x84
+#define BD70528_REG_INT_RTC 0x85
+#define BD70528_REG_INT_GPIO 0x86
+#define BD70528_REG_INT_OP_FAIL 0x87
+
+#define BD70528_REG_INT_SHDN_MASK 0x75
+#define BD70528_REG_INT_PWR_FLT_MASK 0x76
+#define BD70528_REG_INT_VR_FLT_MASK 0x77
+#define BD70528_REG_INT_MISC_MASK 0x78
+#define BD70528_REG_INT_BAT1_MASK 0x79
+#define BD70528_REG_INT_BAT2_MASK 0x7a
+#define BD70528_REG_INT_RTC_MASK 0x7b
+#define BD70528_REG_INT_GPIO_MASK 0x7c
+#define BD70528_REG_INT_OP_FAIL_MASK 0x7d
+
+/* Reset related 'magic' registers */
+#define BD70528_REG_SHIPMODE 0x03
+#define BD70528_REG_HWRESET 0x04
+#define BD70528_REG_WARMRESET 0x05
+#define BD70528_REG_STANDBY 0x06
+
+/* GPIO registers */
+#define BD70528_REG_GPIO_STATE 0x8F
+
+#define BD70528_REG_GPIO1_IN 0x4d
+#define BD70528_REG_GPIO2_IN 0x4f
+#define BD70528_REG_GPIO3_IN 0x51
+#define BD70528_REG_GPIO4_IN 0x53
+#define BD70528_REG_GPIO1_OUT 0x4e
+#define BD70528_REG_GPIO2_OUT 0x50
+#define BD70528_REG_GPIO3_OUT 0x52
+#define BD70528_REG_GPIO4_OUT 0x54
+
+/* clk control */
+
+#define BD70528_REG_CLK_OUT 0x2c
+
+/* RTC */
+
+#define BD70528_REG_RTC_COUNT_H 0x2d
+#define BD70528_REG_RTC_COUNT_L 0x2e
+#define BD70528_REG_RTC_SEC 0x2f
+#define BD70528_REG_RTC_MINUTE 0x30
+#define BD70528_REG_RTC_HOUR 0x31
+#define BD70528_REG_RTC_WEEK 0x32
+#define BD70528_REG_RTC_DAY 0x33
+#define BD70528_REG_RTC_MONTH 0x34
+#define BD70528_REG_RTC_YEAR 0x35
+
+#define BD70528_REG_RTC_ALM_SEC 0x36
+#define BD70528_REG_RTC_ALM_START BD70528_REG_RTC_ALM_SEC
+#define BD70528_REG_RTC_ALM_MINUTE 0x37
+#define BD70528_REG_RTC_ALM_HOUR 0x38
+#define BD70528_REG_RTC_ALM_WEEK 0x39
+#define BD70528_REG_RTC_ALM_DAY 0x3a
+#define BD70528_REG_RTC_ALM_MONTH 0x3b
+#define BD70528_REG_RTC_ALM_YEAR 0x3c
+#define BD70528_REG_RTC_ALM_MASK 0x3d
+#define BD70528_REG_RTC_ALM_REPEAT 0x3e
+#define BD70528_REG_RTC_START BD70528_REG_RTC_SEC
+
+#define BD70528_REG_RTC_WAKE_SEC 0x43
+#define BD70528_REG_RTC_WAKE_START BD70528_REG_RTC_WAKE_SEC
+#define BD70528_REG_RTC_WAKE_MIN 0x44
+#define BD70528_REG_RTC_WAKE_HOUR 0x45
+#define BD70528_REG_RTC_WAKE_CTRL 0x46
+
+#define BD70528_REG_ELAPSED_TIMER_EN 0x42
+#define BD70528_REG_WAKE_EN 0x46
+
+/* WDT registers */
+#define BD70528_REG_WDT_CTRL 0x4A
+#define BD70528_REG_WDT_HOUR 0x49
+#define BD70528_REG_WDT_MINUTE 0x48
+#define BD70528_REG_WDT_SEC 0x47
+
+/* Charger / Battery */
+#define BD70528_REG_CHG_CURR_STAT 0x59
+#define BD70528_REG_CHG_BAT_STAT 0x57
+#define BD70528_REG_CHG_BAT_TEMP 0x58
+#define BD70528_REG_CHG_IN_STAT 0x56
+#define BD70528_REG_CHG_DCIN_ILIM 0x5d
+#define BD70528_REG_CHG_CHG_CURR_WARM 0x61
+#define BD70528_REG_CHG_CHG_CURR_COLD 0x62
+
+
+/* Masks for main IRQ register bits */
+enum {
+ BD70528_INT_SHDN,
+#define BD70528_INT_SHDN_MASK (1<<BD70528_INT_SHDN)
+ BD70528_INT_PWR_FLT,
+#define BD70528_INT_PWR_FLT_MASK (1<<BD70528_INT_PWR_FLT)
+ BD70528_INT_VR_FLT,
+#define BD70528_INT_VR_FLT_MASK (1<<BD70528_INT_VR_FLT)
+ BD70528_INT_MISC,
+#define BD70528_INT_MISC_MASK (1<<BD70528_INT_MISC)
+ BD70528_INT_BAT1,
+#define BD70528_INT_BAT1_MASK (1<<BD70528_INT_BAT1)
+ BD70528_INT_RTC,
+#define BD70528_INT_RTC_MASK (1<<BD70528_INT_RTC)
+ BD70528_INT_GPIO,
+#define BD70528_INT_GPIO_MASK (1<<BD70528_INT_GPIO)
+ BD70528_INT_OP_FAIL,
+#define BD70528_INT_OP_FAIL_MASK (1<<BD70528_INT_OP_FAIL)
+};
+
+/* IRQs */
+enum {
+ /* Shutdown register IRQs */
+ BD70528_INT_LONGPUSH,
+ BD70528_INT_WDT,
+ BD70528_INT_HWRESET,
+ BD70528_INT_RSTB_FAULT,
+ BD70528_INT_VBAT_UVLO,
+ BD70528_INT_TSD,
+ BD70528_INT_RSTIN,
+ /* Power failure register IRQs */
+ BD70528_INT_BUCK1_FAULT,
+ BD70528_INT_BUCK2_FAULT,
+ BD70528_INT_BUCK3_FAULT,
+ BD70528_INT_LDO1_FAULT,
+ BD70528_INT_LDO2_FAULT,
+ BD70528_INT_LDO3_FAULT,
+ BD70528_INT_LED1_FAULT,
+ BD70528_INT_LED2_FAULT,
+ /* VR FAULT register IRQs */
+ BD70528_INT_BUCK1_OCP,
+ BD70528_INT_BUCK2_OCP,
+ BD70528_INT_BUCK3_OCP,
+ BD70528_INT_LED1_OCP,
+ BD70528_INT_LED2_OCP,
+ BD70528_INT_BUCK1_FULLON,
+ BD70528_INT_BUCK2_FULLON,
+ /* PMU register interrupts */
+ BD70528_INT_SHORTPUSH,
+ BD70528_INT_AUTO_WAKEUP,
+ BD70528_INT_STATE_CHANGE,
+ /* Charger 1 register IRQs */
+ BD70528_INT_BAT_OV_RES,
+ BD70528_INT_BAT_OV_DET,
+ BD70528_INT_DBAT_DET,
+ BD70528_INT_BATTSD_COLD_RES,
+ BD70528_INT_BATTSD_COLD_DET,
+ BD70528_INT_BATTSD_HOT_RES,
+ BD70528_INT_BATTSD_HOT_DET,
+ BD70528_INT_CHG_TSD,
+ /* Charger 2 register IRQs */
+ BD70528_INT_BAT_RMV,
+ BD70528_INT_BAT_DET,
+ BD70528_INT_DCIN2_OV_RES,
+ BD70528_INT_DCIN2_OV_DET,
+ BD70528_INT_DCIN2_RMV,
+ BD70528_INT_DCIN2_DET,
+ BD70528_INT_DCIN1_RMV,
+ BD70528_INT_DCIN1_DET,
+ /* RTC register IRQs */
+ BD70528_INT_RTC_ALARM,
+ BD70528_INT_ELPS_TIM,
+ /* GPIO register IRQs */
+ BD70528_INT_GPIO0,
+ BD70528_INT_GPIO1,
+ BD70528_INT_GPIO2,
+ BD70528_INT_GPIO3,
+ /* Invalid operation register IRQs */
+ BD70528_INT_BUCK1_DVS_OPFAIL,
+ BD70528_INT_BUCK2_DVS_OPFAIL,
+ BD70528_INT_BUCK3_DVS_OPFAIL,
+ BD70528_INT_LED1_VOLT_OPFAIL,
+ BD70528_INT_LED2_VOLT_OPFAIL,
+};
+
+/* Masks */
+#define BD70528_INT_LONGPUSH_MASK 0x1
+#define BD70528_INT_WDT_MASK 0x2
+#define BD70528_INT_HWRESET_MASK 0x4
+#define BD70528_INT_RSTB_FAULT_MASK 0x8
+#define BD70528_INT_VBAT_UVLO_MASK 0x10
+#define BD70528_INT_TSD_MASK 0x20
+#define BD70528_INT_RSTIN_MASK 0x40
+
+#define BD70528_INT_BUCK1_FAULT_MASK 0x1
+#define BD70528_INT_BUCK2_FAULT_MASK 0x2
+#define BD70528_INT_BUCK3_FAULT_MASK 0x4
+#define BD70528_INT_LDO1_FAULT_MASK 0x8
+#define BD70528_INT_LDO2_FAULT_MASK 0x10
+#define BD70528_INT_LDO3_FAULT_MASK 0x20
+#define BD70528_INT_LED1_FAULT_MASK 0x40
+#define BD70528_INT_LED2_FAULT_MASK 0x80
+
+#define BD70528_INT_BUCK1_OCP_MASK 0x1
+#define BD70528_INT_BUCK2_OCP_MASK 0x2
+#define BD70528_INT_BUCK3_OCP_MASK 0x4
+#define BD70528_INT_LED1_OCP_MASK 0x8
+#define BD70528_INT_LED2_OCP_MASK 0x10
+#define BD70528_INT_BUCK1_FULLON_MASK 0x20
+#define BD70528_INT_BUCK2_FULLON_MASK 0x40
+
+#define BD70528_INT_SHORTPUSH_MASK 0x1
+#define BD70528_INT_AUTO_WAKEUP_MASK 0x2
+#define BD70528_INT_STATE_CHANGE_MASK 0x10
+
+#define BD70528_INT_BAT_OV_RES_MASK 0x1
+#define BD70528_INT_BAT_OV_DET_MASK 0x2
+#define BD70528_INT_DBAT_DET_MASK 0x4
+#define BD70528_INT_BATTSD_COLD_RES_MASK 0x8
+#define BD70528_INT_BATTSD_COLD_DET_MASK 0x10
+#define BD70528_INT_BATTSD_HOT_RES_MASK 0x20
+#define BD70528_INT_BATTSD_HOT_DET_MASK 0x40
+#define BD70528_INT_CHG_TSD_MASK 0x80
+
+#define BD70528_INT_BAT_RMV_MASK 0x1
+#define BD70528_INT_BAT_DET_MASK 0x2
+#define BD70528_INT_DCIN2_OV_RES_MASK 0x4
+#define BD70528_INT_DCIN2_OV_DET_MASK 0x8
+#define BD70528_INT_DCIN2_RMV_MASK 0x10
+#define BD70528_INT_DCIN2_DET_MASK 0x20
+#define BD70528_INT_DCIN1_RMV_MASK 0x40
+#define BD70528_INT_DCIN1_DET_MASK 0x80
+
+#define BD70528_INT_RTC_ALARM_MASK 0x1
+#define BD70528_INT_ELPS_TIM_MASK 0x2
+
+#define BD70528_INT_GPIO0_MASK 0x1
+#define BD70528_INT_GPIO1_MASK 0x2
+#define BD70528_INT_GPIO2_MASK 0x4
+#define BD70528_INT_GPIO3_MASK 0x8
+
+#define BD70528_INT_BUCK1_DVS_OPFAIL_MASK 0x1
+#define BD70528_INT_BUCK2_DVS_OPFAIL_MASK 0x2
+#define BD70528_INT_BUCK3_DVS_OPFAIL_MASK 0x4
+#define BD70528_INT_LED1_VOLT_OPFAIL_MASK 0x10
+#define BD70528_INT_LED2_VOLT_OPFAIL_MASK 0x20
+
+#define BD70528_DEBOUNCE_MASK 0x3
+
+#define BD70528_DEBOUNCE_DISABLE 0
+#define BD70528_DEBOUNCE_15MS 1
+#define BD70528_DEBOUNCE_30MS 2
+#define BD70528_DEBOUNCE_50MS 3
+
+#define BD70528_GPIO_DRIVE_MASK 0x2
+#define BD70528_GPIO_PUSH_PULL 0x0
+#define BD70528_GPIO_OPEN_DRAIN 0x2
+
+#define BD70528_GPIO_OUT_EN_MASK 0x80
+#define BD70528_GPIO_OUT_ENABLE 0x80
+#define BD70528_GPIO_OUT_DISABLE 0x0
+
+#define BD70528_GPIO_OUT_HI 0x1
+#define BD70528_GPIO_OUT_LO 0x0
+#define BD70528_GPIO_OUT_MASK 0x1
+
+#define BD70528_GPIO_IN_STATE_BASE 1
+
+#define BD70528_CLK_OUT_EN_MASK 0x1
+
+/* RTC masks to mask out reserved bits */
+
+#define BD70528_MASK_RTC_SEC 0x7f
+#define BD70528_MASK_RTC_MINUTE 0x7f
+#define BD70528_MASK_RTC_HOUR_24H 0x80
+#define BD70528_MASK_RTC_HOUR_PM 0x20
+#define BD70528_MASK_RTC_HOUR 0x1f
+#define BD70528_MASK_RTC_DAY 0x3f
+#define BD70528_MASK_RTC_WEEK 0x07
+#define BD70528_MASK_RTC_MONTH 0x1f
+#define BD70528_MASK_RTC_YEAR 0xff
+#define BD70528_MASK_RTC_COUNT_L 0x7f
+
+#define BD70528_MASK_ELAPSED_TIMER_EN 0x1
+/* Mask second, min and hour fields
+ * HW would support ALM irq for over 24h
+ * (by setting day, month and year too)
+ * but as we wish to keep this same as for
+ * wake-up we limit ALM to 24H and only
+ * unmask sec, min and hour
+ */
+#define BD70528_MASK_ALM_EN 0x7
+#define BD70528_MASK_WAKE_EN 0x1
+
+/* WDT masks */
+#define BD70528_MASK_WDT_EN 0x1
+#define BD70528_MASK_WDT_HOUR 0x1
+#define BD70528_MASK_WDT_MINUTE 0x7f
+#define BD70528_MASK_WDT_SEC 0x7f
+
+#define BD70528_WDT_STATE_BIT 0x1
+#define BD70528_ELAPSED_STATE_BIT 0x2
+#define BD70528_WAKE_STATE_BIT 0x4
+
+/* Charger masks */
+#define BD70528_MASK_CHG_STAT 0x7f
+#define BD70528_MASK_CHG_BAT_TIMER 0x20
+#define BD70528_MASK_CHG_BAT_OVERVOLT 0x10
+#define BD70528_MASK_CHG_BAT_DETECT 0x1
+#define BD70528_MASK_CHG_DCIN1_UVLO 0x1
+#define BD70528_MASK_CHG_DCIN_ILIM 0x3f
+#define BD70528_MASK_CHG_CHG_CURR 0x1f
+#define BD70528_MASK_CHG_TRICKLE_CURR 0x10
+
+/*
+ * Note, external battery register is the lonely rider at
+ * address 0xc5. See how to stuff that in the regmap
+ */
+#define BD70528_MAX_REGISTER 0x94
+
+/* Buck control masks */
+#define BD70528_MASK_RUN_EN 0x4
+#define BD70528_MASK_STBY_EN 0x2
+#define BD70528_MASK_IDLE_EN 0x1
+#define BD70528_MASK_LED1_EN 0x1
+#define BD70528_MASK_LED2_EN 0x10
+
+#define BD70528_MASK_BUCK_VOLT 0xf
+#define BD70528_MASK_LDO_VOLT 0x1f
+#define BD70528_MASK_LED1_VOLT 0x1
+#define BD70528_MASK_LED2_VOLT 0x10
+
+/* Misc irq masks */
+#define BD70528_INT_MASK_SHORT_PUSH 1
+#define BD70528_INT_MASK_AUTO_WAKE 2
+#define BD70528_INT_MASK_POWER_STATE 4
+
+#define BD70528_MASK_BUCK_RAMP 0x10
+#define BD70528_SIFT_BUCK_RAMP 4
+
+#endif /* __LINUX_MFD_BD70528_H__ */
--
2.14.3

--
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 ~~~

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