mfd: bd70528: Drop BD70528 support

The only known BD70528 use-cases are such that the PMIC is controlled
from separate MCU which is not running Linux. I am not aware of
any Linux driver users. Furthermore, it seems there is no demand for
this IC. Let's ease the maintenance burden and drop the driver. We can
always add it back if there is sudden need for it.

Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/cf7dfd98b3403ad363b2b48b57bdbfd57a6416cb.1637066805.git.matti.vaittinen@fi.rohmeurope.com

3 files changed, 0 insertions, 332 deletions

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 3fb480818599..34c7d9d6b580 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -1945,23 +1945,6 @@ 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_ROHM_BD71828
 	tristate "ROHM BD71828 and BD71815 Power Management IC"
 	depends on I2C=y
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 0b1b629aef3e..4d53e951a92d 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -257,7 +257,6 @@ obj-$(CONFIG_MFD_STM32_TIMERS) 	+= stm32-timers.o
 obj-$(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-$(CONFIG_MFD_ROHM_BD70528)	+= rohm-bd70528.o
 obj-$(CONFIG_MFD_ROHM_BD71828)	+= rohm-bd71828.o
 obj-$(CONFIG_MFD_ROHM_BD718XX)	+= rohm-bd718x7.o
 obj-$(CONFIG_MFD_ROHM_BD957XMUF)	+= rohm-bd9576.o
diff --git a/drivers/mfd/rohm-bd70528.c b/drivers/mfd/rohm-bd70528.c
deleted file mode 100644
index 5c44d3b77b3e..000000000000
--- a/drivers/mfd/rohm-bd70528.c
+++ /dev/null
@@ -1,314 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-//
-// Copyright (C) 2019 ROHM Semiconductors
-//
-// ROHM BD70528 PMIC driver
-
-#include <linux/i2c.h>
-#include <linux/interrupt.h>
-#include <linux/ioport.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_NUM_OF_GPIOS 4
-
-static const struct resource rtc_irqs[] = {
-	DEFINE_RES_IRQ_NAMED(BD70528_INT_RTC_ALARM, "bd70528-rtc-alm"),
-	DEFINE_RES_IRQ_NAMED(BD70528_INT_ELPS_TIM, "bd70528-elapsed-timer"),
-};
-
-static const struct resource charger_irqs[] = {
-	DEFINE_RES_IRQ_NAMED(BD70528_INT_BAT_OV_RES, "bd70528-bat-ov-res"),
-	DEFINE_RES_IRQ_NAMED(BD70528_INT_BAT_OV_DET, "bd70528-bat-ov-det"),
-	DEFINE_RES_IRQ_NAMED(BD70528_INT_DBAT_DET, "bd70528-bat-dead"),
-	DEFINE_RES_IRQ_NAMED(BD70528_INT_BATTSD_COLD_RES, "bd70528-bat-warmed"),
-	DEFINE_RES_IRQ_NAMED(BD70528_INT_BATTSD_COLD_DET, "bd70528-bat-cold"),
-	DEFINE_RES_IRQ_NAMED(BD70528_INT_BATTSD_HOT_RES, "bd70528-bat-cooled"),
-	DEFINE_RES_IRQ_NAMED(BD70528_INT_BATTSD_HOT_DET, "bd70528-bat-hot"),
-	DEFINE_RES_IRQ_NAMED(BD70528_INT_CHG_TSD, "bd70528-chg-tshd"),
-	DEFINE_RES_IRQ_NAMED(BD70528_INT_BAT_RMV, "bd70528-bat-removed"),
-	DEFINE_RES_IRQ_NAMED(BD70528_INT_BAT_DET, "bd70528-bat-detected"),
-	DEFINE_RES_IRQ_NAMED(BD70528_INT_DCIN2_OV_RES, "bd70528-dcin2-ov-res"),
-	DEFINE_RES_IRQ_NAMED(BD70528_INT_DCIN2_OV_DET, "bd70528-dcin2-ov-det"),
-	DEFINE_RES_IRQ_NAMED(BD70528_INT_DCIN2_RMV, "bd70528-dcin2-removed"),
-	DEFINE_RES_IRQ_NAMED(BD70528_INT_DCIN2_DET, "bd70528-dcin2-detected"),
-	DEFINE_RES_IRQ_NAMED(BD70528_INT_DCIN1_RMV, "bd70528-dcin1-removed"),
-	DEFINE_RES_IRQ_NAMED(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 clock block. Only differences to
-	 * BD70528 clock gate are the register address and mask.
-	 */
-	{ .name = "bd70528-clk", },
-	{ .name = "bd70528-wdt", },
-	{
-		.name = "bd70528-power",
-		.resources = charger_irqs,
-		.num_resources = ARRAY_SIZE(charger_irqs),
-	}, {
-		.name = "bd70528-rtc",
-		.resources = rtc_irqs,
-		.num_resources = ARRAY_SIZE(rtc_irqs),
-	},
-};
-
-static const struct regmap_range volatile_ranges[] = {
-	{
-		.range_min = BD70528_REG_INT_MAIN,
-		.range_max = BD70528_REG_INT_OP_FAIL,
-	}, {
-		.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 also contains a few other registers which require
-		 * magic sequences 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,
-};
-
-/*
- * Mapping of main IRQ register bits to sub-IRQ register offsets so that we can
- * access corect sub-IRQ registers based on bits that are set in main IRQ
- * register.
- */
-
-static unsigned int bit0_offsets[] = {0};	/* Shutdown */
-static unsigned int bit1_offsets[] = {1};	/* Power failure */
-static unsigned int bit2_offsets[] = {2};	/* VR FAULT */
-static unsigned int bit3_offsets[] = {3};	/* PMU interrupts */
-static unsigned int bit4_offsets[] = {4, 5};	/* Charger 1 and Charger 2 */
-static unsigned int bit5_offsets[] = {6};	/* RTC */
-static unsigned int bit6_offsets[] = {7};	/* GPIO */
-static unsigned int bit7_offsets[] = {8};	/* Invalid operation */
-
-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 bd70528_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 = &bd70528_irqs[0],
-	.num_irqs = ARRAY_SIZE(bd70528_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,
-};
-
-static int bd70528_i2c_probe(struct i2c_client *i2c,
-			     const struct i2c_device_id *id)
-{
-	struct bd70528_data *bd70528;
-	struct regmap_irq_chip_data *irq_data;
-	int ret, i;
-
-	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->chip);
-
-	bd70528->chip.regmap = devm_regmap_init_i2c(i2c, &bd70528_regmap);
-	if (IS_ERR(bd70528->chip.regmap)) {
-		dev_err(&i2c->dev, "Failed to initialize Regmap\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(bd70528_irqs); i++)
-		bd70528_irqs[i].type.types_supported = 0;
-
-	/* Set IRQ typesetting information for GPIO pins 0 - 3 */
-	for (i = 0; i < BD70528_NUM_OF_GPIOS; i++) {
-		struct regmap_irq_type *type;
-
-		type = &bd70528_irqs[BD70528_INT_GPIO0 + i].type;
-		type->type_reg_offset = 2 * i;
-		type->type_rising_val = 0x20;
-		type->type_falling_val = 0x10;
-		type->type_level_high_val = 0x40;
-		type->type_level_low_val = 0x50;
-		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 the 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,
-};
-
-module_i2c_driver(bd70528_drv);
-
-MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>");
-MODULE_DESCRIPTION("ROHM BD70528 Power Management IC driver");
-MODULE_LICENSE("GPL");