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0e5df61d26
Add an updated set of registers listed in the core regmap_range volatile ranges defined for the DA9063. These new registers contain bits that cannot be considered under the full control of software. Under various conditions the hardware will set and/or automatically clear bit(s) contained in these registers. When using a cached version of regmap, the volatility of these registers must be identified otherwise the regmap operations may not ensure the registers are explicitly altered. As well as updating the list of volatile registers, this change will fix a corner case discovered in the DA9063 ONKEY which is used by the DA9063 core. In the ONKEY case, the CONTROL_B register is now listed as volatile in the regmap_range because it contains the bit field NONKEY_LOCK. This bit can be altered by hardware, in which case regmap must be notified of its ability to be manpiulated outside of software control. Signed-off-by: Steve Twiss <stwiss.opensource@diasemi.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
299 lines
7.7 KiB
C
299 lines
7.7 KiB
C
/* da9063-i2c.c: Interrupt support for Dialog DA9063
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*
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* Copyright 2012 Dialog Semiconductor Ltd.
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* Copyright 2013 Philipp Zabel, Pengutronix
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*
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* Author: Krystian Garbaciak <krystian.garbaciak@diasemi.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/i2c.h>
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#include <linux/regmap.h>
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#include <linux/delay.h>
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#include <linux/slab.h>
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#include <linux/err.h>
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#include <linux/mfd/core.h>
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#include <linux/mfd/da9063/core.h>
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#include <linux/mfd/da9063/pdata.h>
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#include <linux/mfd/da9063/registers.h>
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#include <linux/of.h>
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#include <linux/regulator/of_regulator.h>
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static const struct regmap_range da9063_ad_readable_ranges[] = {
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{
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.range_min = DA9063_REG_PAGE_CON,
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.range_max = DA9063_AD_REG_SECOND_D,
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}, {
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.range_min = DA9063_REG_SEQ,
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.range_max = DA9063_REG_ID_32_31,
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}, {
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.range_min = DA9063_REG_SEQ_A,
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.range_max = DA9063_REG_AUTO3_LOW,
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}, {
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.range_min = DA9063_REG_T_OFFSET,
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.range_max = DA9063_AD_REG_GP_ID_19,
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}, {
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.range_min = DA9063_REG_CHIP_ID,
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.range_max = DA9063_REG_CHIP_VARIANT,
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},
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};
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static const struct regmap_range da9063_ad_writeable_ranges[] = {
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{
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.range_min = DA9063_REG_PAGE_CON,
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.range_max = DA9063_REG_PAGE_CON,
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}, {
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.range_min = DA9063_REG_FAULT_LOG,
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.range_max = DA9063_REG_VSYS_MON,
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}, {
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.range_min = DA9063_REG_COUNT_S,
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.range_max = DA9063_AD_REG_ALARM_Y,
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}, {
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.range_min = DA9063_REG_SEQ,
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.range_max = DA9063_REG_ID_32_31,
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}, {
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.range_min = DA9063_REG_SEQ_A,
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.range_max = DA9063_REG_AUTO3_LOW,
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}, {
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.range_min = DA9063_REG_CONFIG_I,
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.range_max = DA9063_AD_REG_MON_REG_4,
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}, {
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.range_min = DA9063_AD_REG_GP_ID_0,
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.range_max = DA9063_AD_REG_GP_ID_19,
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},
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};
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static const struct regmap_range da9063_ad_volatile_ranges[] = {
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{
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.range_min = DA9063_REG_PAGE_CON,
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.range_max = DA9063_REG_EVENT_D,
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}, {
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.range_min = DA9063_REG_CONTROL_A,
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.range_max = DA9063_REG_CONTROL_B,
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}, {
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.range_min = DA9063_REG_CONTROL_E,
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.range_max = DA9063_REG_CONTROL_F,
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}, {
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.range_min = DA9063_REG_BCORE2_CONT,
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.range_max = DA9063_REG_LDO11_CONT,
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}, {
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.range_min = DA9063_REG_DVC_1,
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.range_max = DA9063_REG_ADC_MAN,
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}, {
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.range_min = DA9063_REG_ADC_RES_L,
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.range_max = DA9063_AD_REG_SECOND_D,
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}, {
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.range_min = DA9063_REG_SEQ,
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.range_max = DA9063_REG_SEQ,
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}, {
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.range_min = DA9063_REG_EN_32K,
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.range_max = DA9063_REG_EN_32K,
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}, {
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.range_min = DA9063_AD_REG_MON_REG_5,
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.range_max = DA9063_AD_REG_MON_REG_6,
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},
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};
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static const struct regmap_access_table da9063_ad_readable_table = {
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.yes_ranges = da9063_ad_readable_ranges,
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.n_yes_ranges = ARRAY_SIZE(da9063_ad_readable_ranges),
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};
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static const struct regmap_access_table da9063_ad_writeable_table = {
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.yes_ranges = da9063_ad_writeable_ranges,
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.n_yes_ranges = ARRAY_SIZE(da9063_ad_writeable_ranges),
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};
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static const struct regmap_access_table da9063_ad_volatile_table = {
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.yes_ranges = da9063_ad_volatile_ranges,
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.n_yes_ranges = ARRAY_SIZE(da9063_ad_volatile_ranges),
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};
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static const struct regmap_range da9063_bb_readable_ranges[] = {
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{
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.range_min = DA9063_REG_PAGE_CON,
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.range_max = DA9063_BB_REG_SECOND_D,
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}, {
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.range_min = DA9063_REG_SEQ,
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.range_max = DA9063_REG_ID_32_31,
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}, {
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.range_min = DA9063_REG_SEQ_A,
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.range_max = DA9063_REG_AUTO3_LOW,
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}, {
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.range_min = DA9063_REG_T_OFFSET,
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.range_max = DA9063_BB_REG_GP_ID_19,
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}, {
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.range_min = DA9063_REG_CHIP_ID,
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.range_max = DA9063_REG_CHIP_VARIANT,
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},
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};
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static const struct regmap_range da9063_bb_writeable_ranges[] = {
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{
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.range_min = DA9063_REG_PAGE_CON,
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.range_max = DA9063_REG_PAGE_CON,
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}, {
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.range_min = DA9063_REG_FAULT_LOG,
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.range_max = DA9063_REG_VSYS_MON,
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}, {
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.range_min = DA9063_REG_COUNT_S,
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.range_max = DA9063_BB_REG_ALARM_Y,
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}, {
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.range_min = DA9063_REG_SEQ,
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.range_max = DA9063_REG_ID_32_31,
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}, {
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.range_min = DA9063_REG_SEQ_A,
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.range_max = DA9063_REG_AUTO3_LOW,
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}, {
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.range_min = DA9063_REG_CONFIG_I,
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.range_max = DA9063_BB_REG_MON_REG_4,
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}, {
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.range_min = DA9063_BB_REG_GP_ID_0,
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.range_max = DA9063_BB_REG_GP_ID_19,
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},
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};
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static const struct regmap_range da9063_bb_volatile_ranges[] = {
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{
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.range_min = DA9063_REG_PAGE_CON,
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.range_max = DA9063_REG_EVENT_D,
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}, {
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.range_min = DA9063_REG_CONTROL_A,
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.range_max = DA9063_REG_CONTROL_B,
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}, {
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.range_min = DA9063_REG_CONTROL_E,
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.range_max = DA9063_REG_CONTROL_F,
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}, {
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.range_min = DA9063_REG_BCORE2_CONT,
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.range_max = DA9063_REG_LDO11_CONT,
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}, {
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.range_min = DA9063_REG_DVC_1,
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.range_max = DA9063_REG_ADC_MAN,
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}, {
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.range_min = DA9063_REG_ADC_RES_L,
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.range_max = DA9063_BB_REG_SECOND_D,
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}, {
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.range_min = DA9063_REG_SEQ,
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.range_max = DA9063_REG_SEQ,
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}, {
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.range_min = DA9063_REG_EN_32K,
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.range_max = DA9063_REG_EN_32K,
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}, {
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.range_min = DA9063_BB_REG_MON_REG_5,
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.range_max = DA9063_BB_REG_MON_REG_6,
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},
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};
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static const struct regmap_access_table da9063_bb_readable_table = {
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.yes_ranges = da9063_bb_readable_ranges,
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.n_yes_ranges = ARRAY_SIZE(da9063_bb_readable_ranges),
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};
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static const struct regmap_access_table da9063_bb_writeable_table = {
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.yes_ranges = da9063_bb_writeable_ranges,
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.n_yes_ranges = ARRAY_SIZE(da9063_bb_writeable_ranges),
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};
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static const struct regmap_access_table da9063_bb_volatile_table = {
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.yes_ranges = da9063_bb_volatile_ranges,
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.n_yes_ranges = ARRAY_SIZE(da9063_bb_volatile_ranges),
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};
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static const struct regmap_range_cfg da9063_range_cfg[] = {
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{
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.range_min = DA9063_REG_PAGE_CON,
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.range_max = DA9063_REG_CHIP_VARIANT,
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.selector_reg = DA9063_REG_PAGE_CON,
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.selector_mask = 1 << DA9063_I2C_PAGE_SEL_SHIFT,
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.selector_shift = DA9063_I2C_PAGE_SEL_SHIFT,
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.window_start = 0,
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.window_len = 256,
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}
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};
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static struct regmap_config da9063_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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.ranges = da9063_range_cfg,
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.num_ranges = ARRAY_SIZE(da9063_range_cfg),
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.max_register = DA9063_REG_CHIP_VARIANT,
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.cache_type = REGCACHE_RBTREE,
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};
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static const struct of_device_id da9063_dt_ids[] = {
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{ .compatible = "dlg,da9063", },
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{ }
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};
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MODULE_DEVICE_TABLE(of, da9063_dt_ids);
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static int da9063_i2c_probe(struct i2c_client *i2c,
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const struct i2c_device_id *id)
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{
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struct da9063 *da9063;
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int ret;
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da9063 = devm_kzalloc(&i2c->dev, sizeof(struct da9063), GFP_KERNEL);
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if (da9063 == NULL)
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return -ENOMEM;
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i2c_set_clientdata(i2c, da9063);
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da9063->dev = &i2c->dev;
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da9063->chip_irq = i2c->irq;
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if (da9063->variant_code == PMIC_DA9063_AD) {
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da9063_regmap_config.rd_table = &da9063_ad_readable_table;
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da9063_regmap_config.wr_table = &da9063_ad_writeable_table;
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da9063_regmap_config.volatile_table = &da9063_ad_volatile_table;
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} else {
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da9063_regmap_config.rd_table = &da9063_bb_readable_table;
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da9063_regmap_config.wr_table = &da9063_bb_writeable_table;
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da9063_regmap_config.volatile_table = &da9063_bb_volatile_table;
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}
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da9063->regmap = devm_regmap_init_i2c(i2c, &da9063_regmap_config);
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if (IS_ERR(da9063->regmap)) {
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ret = PTR_ERR(da9063->regmap);
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dev_err(da9063->dev, "Failed to allocate register map: %d\n",
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ret);
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return ret;
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}
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return da9063_device_init(da9063, i2c->irq);
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}
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static int da9063_i2c_remove(struct i2c_client *i2c)
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{
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struct da9063 *da9063 = i2c_get_clientdata(i2c);
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da9063_device_exit(da9063);
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return 0;
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}
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static const struct i2c_device_id da9063_i2c_id[] = {
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{"da9063", PMIC_DA9063},
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{},
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};
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MODULE_DEVICE_TABLE(i2c, da9063_i2c_id);
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static struct i2c_driver da9063_i2c_driver = {
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.driver = {
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.name = "da9063",
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.of_match_table = of_match_ptr(da9063_dt_ids),
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},
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.probe = da9063_i2c_probe,
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.remove = da9063_i2c_remove,
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.id_table = da9063_i2c_id,
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};
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module_i2c_driver(da9063_i2c_driver);
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