mfd: Remove support for AB3100

The ST-Ericsson U300 platform has been removed, so this driver is no
longer needed.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

drivers/mfd/Kconfig

@@ -1235,7 +1235,7 @@ config MFD_SC27XX_PMIC
 
 config ABX500_CORE
 	bool "ST-Ericsson ABX500 Mixed Signal Circuit register functions"
-	default y if ARCH_U300 || ARCH_U8500 || COMPILE_TEST
+	default y if ARCH_U8500 || COMPILE_TEST
 	help
 	  Say yes here if you have the ABX500 Mixed Signal IC family
 	  chips. This core driver expose register access functions.
@@ -1243,30 +1243,6 @@ config ABX500_CORE
 	  remain unchanged when IC changes. Binding of the functions to
 	  actual register access is done by the IC core driver.
 
-config AB3100_CORE
-	bool "ST-Ericsson AB3100 Mixed Signal Circuit core functions"
-	depends on I2C=y && ABX500_CORE
-	select MFD_CORE
-	default y if ARCH_U300
-	help
-	  Select this to enable the AB3100 Mixed Signal IC core
-	  functionality. This connects to a AB3100 on the I2C bus
-	  and expose a number of symbols needed for dependent devices
-	  to read and write registers and subscribe to events from
-	  this multi-functional IC. This is needed to use other features
-	  of the AB3100 such as battery-backed RTC, charging control,
-	  LEDs, vibrator, system power and temperature, power management
-	  and ALSA sound.
-
-config AB3100_OTP
-	tristate "ST-Ericsson AB3100 OTP functions"
-	depends on AB3100_CORE
-	default y if AB3100_CORE
-	help
-	  Select this to enable the AB3100 Mixed Signal IC OTP (one-time
-	  programmable memory) support. This exposes a sysfs file to read
-	  out OTP values.
-
 config AB8500_CORE
 	bool "ST-Ericsson AB8500 Mixed Signal Power Management chip"
 	depends on ABX500_CORE && MFD_DB8500_PRCMU

drivers/mfd/Makefile

@@ -178,8 +178,6 @@ obj-$(CONFIG_MFD_PCF50633)	+= pcf50633.o
 obj-$(CONFIG_PCF50633_ADC)	+= pcf50633-adc.o
 obj-$(CONFIG_PCF50633_GPIO)	+= pcf50633-gpio.o
 obj-$(CONFIG_ABX500_CORE)	+= abx500-core.o
-obj-$(CONFIG_AB3100_CORE)	+= ab3100-core.o
-obj-$(CONFIG_AB3100_OTP)	+= ab3100-otp.o
 obj-$(CONFIG_AB8500_DEBUG)	+= ab8500-debugfs.o
 obj-$(CONFIG_MFD_DB8500_PRCMU)	+= db8500-prcmu.o
 # ab8500-core need to come after db8500-prcmu (which provides the channel)

drivers/mfd/ab3100-otp.c

-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * drivers/mfd/ab3100_otp.c
- *
- * Copyright (C) 2007-2009 ST-Ericsson AB
- * Driver to read out OTP from the AB3100 Mixed-signal circuit
- * Author: Linus Walleij <linus.walleij@stericsson.com>
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/init.h>
-#include <linux/platform_device.h>
-#include <linux/mfd/abx500.h>
-#include <linux/debugfs.h>
-#include <linux/seq_file.h>
-
-/* The OTP registers */
-#define AB3100_OTP0		0xb0
-#define AB3100_OTP1		0xb1
-#define AB3100_OTP2		0xb2
-#define AB3100_OTP3		0xb3
-#define AB3100_OTP4		0xb4
-#define AB3100_OTP5		0xb5
-#define AB3100_OTP6		0xb6
-#define AB3100_OTP7		0xb7
-#define AB3100_OTPP		0xbf
-
-/**
- * struct ab3100_otp
- * @dev: containing device
- * @locked: whether the OTP is locked, after locking, no more bits
- *       can be changed but before locking it is still possible
- *       to change bits from 1->0.
- * @freq: clocking frequency for the OTP, this frequency is either
- *       32768Hz or 1MHz/30
- * @paf: product activation flag, indicates whether this is a real
- *       product (paf true) or a lab board etc (paf false)
- * @imeich: if this is set it is possible to override the
- *       IMEI number found in the tac, fac and svn fields with
- *       (secured) software
- * @cid: customer ID
- * @tac: type allocation code of the IMEI
- * @fac: final assembly code of the IMEI
- * @svn: software version number of the IMEI
- * @debugfs: a debugfs file used when dumping to file
- */
-struct ab3100_otp {
-	struct device *dev;
-	bool locked;
-	u32 freq;
-	bool paf;
-	bool imeich;
-	u16 cid:14;
-	u32 tac:20;
-	u8 fac;
-	u32 svn:20;
-	struct dentry *debugfs;
-};
-
-static int __init ab3100_otp_read(struct ab3100_otp *otp)
-{
-	u8 otpval[8];
-	u8 otpp;
-	int err;
-
-	err = abx500_get_register_interruptible(otp->dev, 0,
-		AB3100_OTPP, &otpp);
-	if (err) {
-		dev_err(otp->dev, "unable to read OTPP register\n");
-		return err;
-	}
-
-	err = abx500_get_register_page_interruptible(otp->dev, 0,
-		AB3100_OTP0, otpval, 8);
-	if (err) {
-		dev_err(otp->dev, "unable to read OTP register page\n");
-		return err;
-	}
-
-	/* Cache OTP properties, they never change by nature */
-	otp->locked = (otpp & 0x80);
-	otp->freq = (otpp & 0x40) ? 32768 : 34100;
-	otp->paf = (otpval[1] & 0x80);
-	otp->imeich = (otpval[1] & 0x40);
-	otp->cid = ((otpval[1] << 8) | otpval[0]) & 0x3fff;
-	otp->tac = ((otpval[4] & 0x0f) << 16) | (otpval[3] << 8) | otpval[2];
-	otp->fac = ((otpval[5] & 0x0f) << 4) | (otpval[4] >> 4);
-	otp->svn = (otpval[7] << 12) | (otpval[6] << 4) | (otpval[5] >> 4);
-	return 0;
-}
-
-/*
- * This is a simple debugfs human-readable file that dumps out
- * the contents of the OTP.
- */
-#ifdef CONFIG_DEBUG_FS
-static int ab3100_show_otp(struct seq_file *s, void *v)
-{
-	struct ab3100_otp *otp = s->private;
-
-	seq_printf(s, "OTP is %s\n", otp->locked ? "LOCKED" : "UNLOCKED");
-	seq_printf(s, "OTP clock switch startup is %uHz\n", otp->freq);
-	seq_printf(s, "PAF is %s\n", otp->paf ? "SET" : "NOT SET");
-	seq_printf(s, "IMEI is %s\n", otp->imeich ?
-		   "CHANGEABLE" : "NOT CHANGEABLE");
-	seq_printf(s, "CID: 0x%04x (decimal: %d)\n", otp->cid, otp->cid);
-	seq_printf(s, "IMEI: %u-%u-%u\n", otp->tac, otp->fac, otp->svn);
-	return 0;
-}
-
-static int ab3100_otp_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, ab3100_show_otp, inode->i_private);
-}
-
-static const struct file_operations ab3100_otp_operations = {
-	.open		= ab3100_otp_open,
-	.read		= seq_read,
-	.llseek		= seq_lseek,
-	.release	= single_release,
-};
-
-static void __init ab3100_otp_init_debugfs(struct device *dev,
-					   struct ab3100_otp *otp)
-{
-	otp->debugfs = debugfs_create_file("ab3100_otp", S_IFREG | S_IRUGO,
-					   NULL, otp, &ab3100_otp_operations);
-}
-
-static void __exit ab3100_otp_exit_debugfs(struct ab3100_otp *otp)
-{
-	debugfs_remove(otp->debugfs);
-}
-#else
-/* Compile this out if debugfs not selected */
-static inline void __init ab3100_otp_init_debugfs(struct device *dev,
-						  struct ab3100_otp *otp)
-{
-}
-
-static inline void __exit ab3100_otp_exit_debugfs(struct ab3100_otp *otp)
-{
-}
-#endif
-
-#define SHOW_AB3100_ATTR(name) \
-static ssize_t ab3100_otp_##name##_show(struct device *dev, \
-			       struct device_attribute *attr, \
-			       char *buf) \
-{\
-	struct ab3100_otp *otp = dev_get_drvdata(dev); \
-	return sprintf(buf, "%u\n", otp->name); \
-}
-
-SHOW_AB3100_ATTR(locked)
-SHOW_AB3100_ATTR(freq)
-SHOW_AB3100_ATTR(paf)
-SHOW_AB3100_ATTR(imeich)
-SHOW_AB3100_ATTR(cid)
-SHOW_AB3100_ATTR(fac)
-SHOW_AB3100_ATTR(tac)
-SHOW_AB3100_ATTR(svn)
-
-static struct device_attribute ab3100_otp_attrs[] = {
-	__ATTR(locked, S_IRUGO, ab3100_otp_locked_show, NULL),
-	__ATTR(freq, S_IRUGO, ab3100_otp_freq_show, NULL),
-	__ATTR(paf, S_IRUGO, ab3100_otp_paf_show, NULL),
-	__ATTR(imeich, S_IRUGO, ab3100_otp_imeich_show, NULL),
-	__ATTR(cid, S_IRUGO, ab3100_otp_cid_show, NULL),
-	__ATTR(fac, S_IRUGO, ab3100_otp_fac_show, NULL),
-	__ATTR(tac, S_IRUGO, ab3100_otp_tac_show, NULL),
-	__ATTR(svn, S_IRUGO, ab3100_otp_svn_show, NULL),
-};
-
-static int __init ab3100_otp_probe(struct platform_device *pdev)
-{
-	struct ab3100_otp *otp;
-	int err = 0;
-	int i;
-
-	otp = devm_kzalloc(&pdev->dev, sizeof(struct ab3100_otp), GFP_KERNEL);
-	if (!otp)
-		return -ENOMEM;
-
-	otp->dev = &pdev->dev;
-
-	/* Replace platform data coming in with a local struct */
-	platform_set_drvdata(pdev, otp);
-
-	err = ab3100_otp_read(otp);
-	if (err)
-		return err;
-
-	dev_info(&pdev->dev, "AB3100 OTP readout registered\n");
-
-	/* sysfs entries */
-	for (i = 0; i < ARRAY_SIZE(ab3100_otp_attrs); i++) {
-		err = device_create_file(&pdev->dev,
-					 &ab3100_otp_attrs[i]);
-		if (err)
-			goto err;
-	}
-
-	/* debugfs entries */
-	ab3100_otp_init_debugfs(&pdev->dev, otp);
-
-	return 0;
-
-err:
-	while (--i >= 0)
-		device_remove_file(&pdev->dev, &ab3100_otp_attrs[i]);
-	return err;
-}
-
-static int __exit ab3100_otp_remove(struct platform_device *pdev)
-{
-	struct ab3100_otp *otp = platform_get_drvdata(pdev);
-	int i;
-
-	for (i = 0; i < ARRAY_SIZE(ab3100_otp_attrs); i++)
-		device_remove_file(&pdev->dev,
-				   &ab3100_otp_attrs[i]);
-	ab3100_otp_exit_debugfs(otp);
-	return 0;
-}
-
-static struct platform_driver ab3100_otp_driver = {
-	.driver = {
-		.name = "ab3100-otp",
-	},
-	.remove	 = __exit_p(ab3100_otp_remove),
-};
-
-module_platform_driver_probe(ab3100_otp_driver, ab3100_otp_probe);
-
-MODULE_AUTHOR("Linus Walleij <linus.walleij@stericsson.com>");
-MODULE_DESCRIPTION("AB3100 OTP Readout Driver");
-MODULE_LICENSE("GPL");

include/linux/mfd/ab3100.h

-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Copyright (C) 2007-2009 ST-Ericsson AB
- * AB3100 core access functions
- * Author: Linus Walleij <linus.walleij@stericsson.com>
- */
-
-#include <linux/regulator/machine.h>
-
-struct device;
-
-#ifndef MFD_AB3100_H
-#define MFD_AB3100_H
-
-
-#define AB3100_P1A	0xc0
-#define AB3100_P1B	0xc1
-#define AB3100_P1C	0xc2
-#define AB3100_P1D	0xc3
-#define AB3100_P1E	0xc4
-#define AB3100_P1F	0xc5
-#define AB3100_P1G	0xc6
-#define AB3100_R2A	0xc7
-#define AB3100_R2B	0xc8
-
-/*
- * AB3100, EVENTA1, A2 and A3 event register flags
- * these are catenated into a single 32-bit flag in the code
- * for event notification broadcasts.
- */
-#define AB3100_EVENTA1_ONSWA				(0x01<<16)
-#define AB3100_EVENTA1_ONSWB				(0x02<<16)
-#define AB3100_EVENTA1_ONSWC				(0x04<<16)
-#define AB3100_EVENTA1_DCIO				(0x08<<16)
-#define AB3100_EVENTA1_OVER_TEMP			(0x10<<16)
-#define AB3100_EVENTA1_SIM_OFF				(0x20<<16)
-#define AB3100_EVENTA1_VBUS				(0x40<<16)
-#define AB3100_EVENTA1_VSET_USB				(0x80<<16)
-
-#define AB3100_EVENTA2_READY_TX				(0x01<<8)
-#define AB3100_EVENTA2_READY_RX				(0x02<<8)
-#define AB3100_EVENTA2_OVERRUN_ERROR			(0x04<<8)
-#define AB3100_EVENTA2_FRAMING_ERROR			(0x08<<8)
-#define AB3100_EVENTA2_CHARG_OVERCURRENT		(0x10<<8)
-#define AB3100_EVENTA2_MIDR				(0x20<<8)
-#define AB3100_EVENTA2_BATTERY_REM			(0x40<<8)
-#define AB3100_EVENTA2_ALARM				(0x80<<8)
-
-#define AB3100_EVENTA3_ADC_TRIG5			(0x01)
-#define AB3100_EVENTA3_ADC_TRIG4			(0x02)
-#define AB3100_EVENTA3_ADC_TRIG3			(0x04)
-#define AB3100_EVENTA3_ADC_TRIG2			(0x08)
-#define AB3100_EVENTA3_ADC_TRIGVBAT			(0x10)
-#define AB3100_EVENTA3_ADC_TRIGVTX			(0x20)
-#define AB3100_EVENTA3_ADC_TRIG1			(0x40)
-#define AB3100_EVENTA3_ADC_TRIG0			(0x80)
-
-/* AB3100, STR register flags */
-#define AB3100_STR_ONSWA				(0x01)
-#define AB3100_STR_ONSWB				(0x02)
-#define AB3100_STR_ONSWC				(0x04)
-#define AB3100_STR_DCIO					(0x08)
-#define AB3100_STR_BOOT_MODE				(0x10)
-#define AB3100_STR_SIM_OFF				(0x20)
-#define AB3100_STR_BATT_REMOVAL				(0x40)
-#define AB3100_STR_VBUS					(0x80)
-
-/*
- * AB3100 contains 8 regulators, one external regulator controller
- * and a buck converter, further the LDO E and buck converter can
- * have separate settings if they are in sleep mode, this is
- * modeled as a separate regulator.
- */
-#define AB3100_NUM_REGULATORS				10
-
-/**
- * struct ab3100
- * @access_mutex: lock out concurrent accesses to the AB3100 registers
- * @dev: pointer to the containing device
- * @i2c_client: I2C client for this chip
- * @testreg_client: secondary client for test registers
- * @chip_name: name of this chip variant
- * @chip_id: 8 bit chip ID for this chip variant
- * @event_subscribers: event subscribers are listed here
- * @startup_events: a copy of the first reading of the event registers
- * @startup_events_read: whether the first events have been read
- *
- * This struct is PRIVATE and devices using it should NOT
- * access ANY fields. It is used as a token for calling the
- * AB3100 functions.
- */
-struct ab3100 {
-	struct mutex access_mutex;
-	struct device *dev;
-	struct i2c_client *i2c_client;
-	struct i2c_client *testreg_client;
-	char chip_name[32];
-	u8 chip_id;
-	struct blocking_notifier_head event_subscribers;
-	u8 startup_events[3];
-	bool startup_events_read;
-};
-
-/**
- * struct ab3100_platform_data
- * Data supplied to initialize board connections to the AB3100
- * @reg_constraints: regulator constraints for target board
- *     the order of these constraints are: LDO A, C, D, E,
- *     F, G, H, K, EXT and BUCK.
- * @reg_initvals: initial values for the regulator registers
- *     plus two sleep settings for LDO E and the BUCK converter.
- *     exactly AB3100_NUM_REGULATORS+2 values must be sent in.
- *     Order: LDO A, C, E, E sleep, F, G, H, K, EXT, BUCK,
- *     BUCK sleep, LDO D. (LDO D need to be initialized last.)
- * @external_voltage: voltage level of the external regulator.
- */
-struct ab3100_platform_data {
-	struct regulator_init_data reg_constraints[AB3100_NUM_REGULATORS];
-	u8 reg_initvals[AB3100_NUM_REGULATORS+2];
-	int external_voltage;
-};
-
-int ab3100_event_register(struct ab3100 *ab3100,
-			  struct notifier_block *nb);
-int ab3100_event_unregister(struct ab3100 *ab3100,
-			    struct notifier_block *nb);
-
-#endif /*  MFD_AB3100_H */