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The Crystal Cove PMIC has a pin which can be used to connect the IRQ of an external charger IC. On some boards this is used and we need to have a cell for this, with a driver which creates its own irqchip with a single IRQ for the charger driver to consume. The charger driver cannot directly consume the IRQ from the MFD level irqchip because the PMIC has 2 levels of interrupts and the second level interrupt status register, which is handled by the cell drivers, needs to have the IRQ acked to avoid an IRQ storm. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Lee Jones <lee.jones@linaro.org> Link: https://lore.kernel.org/r/20211225115509.94891-3-hdegoede@redhat.com
150 lines
4.0 KiB
C
150 lines
4.0 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Device access for Crystal Cove PMIC
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*
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* Copyright (C) 2013, 2014 Intel Corporation. All rights reserved.
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*
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* Author: Yang, Bin <bin.yang@intel.com>
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* Author: Zhu, Lejun <lejun.zhu@linux.intel.com>
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*/
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#include <linux/interrupt.h>
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#include <linux/regmap.h>
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#include <linux/mfd/core.h>
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#include <linux/mfd/intel_soc_pmic.h>
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#include "intel_soc_pmic_core.h"
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#define CRYSTAL_COVE_MAX_REGISTER 0xC6
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#define CRYSTAL_COVE_REG_IRQLVL1 0x02
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#define CRYSTAL_COVE_REG_MIRQLVL1 0x0E
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#define CRYSTAL_COVE_IRQ_PWRSRC 0
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#define CRYSTAL_COVE_IRQ_THRM 1
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#define CRYSTAL_COVE_IRQ_BCU 2
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#define CRYSTAL_COVE_IRQ_ADC 3
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#define CRYSTAL_COVE_IRQ_CHGR 4
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#define CRYSTAL_COVE_IRQ_GPIO 5
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#define CRYSTAL_COVE_IRQ_VHDMIOCP 6
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static const struct resource pwrsrc_resources[] = {
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DEFINE_RES_IRQ_NAMED(CRYSTAL_COVE_IRQ_PWRSRC, "PWRSRC"),
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};
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static const struct resource thermal_resources[] = {
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DEFINE_RES_IRQ_NAMED(CRYSTAL_COVE_IRQ_THRM, "THERMAL"),
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};
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static const struct resource bcu_resources[] = {
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DEFINE_RES_IRQ_NAMED(CRYSTAL_COVE_IRQ_BCU, "BCU"),
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};
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static const struct resource adc_resources[] = {
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DEFINE_RES_IRQ_NAMED(CRYSTAL_COVE_IRQ_ADC, "ADC"),
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};
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static const struct resource charger_resources[] = {
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DEFINE_RES_IRQ_NAMED(CRYSTAL_COVE_IRQ_CHGR, "CHGR"),
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};
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static const struct resource gpio_resources[] = {
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DEFINE_RES_IRQ_NAMED(CRYSTAL_COVE_IRQ_GPIO, "GPIO"),
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};
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static struct mfd_cell crystal_cove_byt_dev[] = {
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{
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.name = "crystal_cove_pwrsrc",
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.num_resources = ARRAY_SIZE(pwrsrc_resources),
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.resources = pwrsrc_resources,
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},
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{
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.name = "crystal_cove_thermal",
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.num_resources = ARRAY_SIZE(thermal_resources),
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.resources = thermal_resources,
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},
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{
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.name = "crystal_cove_bcu",
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.num_resources = ARRAY_SIZE(bcu_resources),
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.resources = bcu_resources,
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},
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{
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.name = "crystal_cove_adc",
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.num_resources = ARRAY_SIZE(adc_resources),
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.resources = adc_resources,
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},
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{
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.name = "crystal_cove_charger",
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.num_resources = ARRAY_SIZE(charger_resources),
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.resources = charger_resources,
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},
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{
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.name = "crystal_cove_gpio",
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.num_resources = ARRAY_SIZE(gpio_resources),
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.resources = gpio_resources,
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},
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{
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.name = "byt_crystal_cove_pmic",
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},
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{
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.name = "crystal_cove_pwm",
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},
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};
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static struct mfd_cell crystal_cove_cht_dev[] = {
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{
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.name = "crystal_cove_gpio",
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.num_resources = ARRAY_SIZE(gpio_resources),
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.resources = gpio_resources,
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},
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{
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.name = "cht_crystal_cove_pmic",
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},
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{
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.name = "crystal_cove_pwm",
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},
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};
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static const struct regmap_config crystal_cove_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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.max_register = CRYSTAL_COVE_MAX_REGISTER,
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.cache_type = REGCACHE_NONE,
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};
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static const struct regmap_irq crystal_cove_irqs[] = {
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REGMAP_IRQ_REG(CRYSTAL_COVE_IRQ_PWRSRC, 0, BIT(CRYSTAL_COVE_IRQ_PWRSRC)),
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REGMAP_IRQ_REG(CRYSTAL_COVE_IRQ_THRM, 0, BIT(CRYSTAL_COVE_IRQ_THRM)),
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REGMAP_IRQ_REG(CRYSTAL_COVE_IRQ_BCU, 0, BIT(CRYSTAL_COVE_IRQ_BCU)),
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REGMAP_IRQ_REG(CRYSTAL_COVE_IRQ_ADC, 0, BIT(CRYSTAL_COVE_IRQ_ADC)),
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REGMAP_IRQ_REG(CRYSTAL_COVE_IRQ_CHGR, 0, BIT(CRYSTAL_COVE_IRQ_CHGR)),
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REGMAP_IRQ_REG(CRYSTAL_COVE_IRQ_GPIO, 0, BIT(CRYSTAL_COVE_IRQ_GPIO)),
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REGMAP_IRQ_REG(CRYSTAL_COVE_IRQ_VHDMIOCP, 0, BIT(CRYSTAL_COVE_IRQ_VHDMIOCP)),
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};
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static const struct regmap_irq_chip crystal_cove_irq_chip = {
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.name = "Crystal Cove",
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.irqs = crystal_cove_irqs,
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.num_irqs = ARRAY_SIZE(crystal_cove_irqs),
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.num_regs = 1,
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.status_base = CRYSTAL_COVE_REG_IRQLVL1,
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.mask_base = CRYSTAL_COVE_REG_MIRQLVL1,
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};
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struct intel_soc_pmic_config intel_soc_pmic_config_byt_crc = {
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.irq_flags = IRQF_TRIGGER_RISING,
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.cell_dev = crystal_cove_byt_dev,
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.n_cell_devs = ARRAY_SIZE(crystal_cove_byt_dev),
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.regmap_config = &crystal_cove_regmap_config,
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.irq_chip = &crystal_cove_irq_chip,
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};
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struct intel_soc_pmic_config intel_soc_pmic_config_cht_crc = {
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.irq_flags = IRQF_TRIGGER_RISING,
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.cell_dev = crystal_cove_cht_dev,
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.n_cell_devs = ARRAY_SIZE(crystal_cove_cht_dev),
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.regmap_config = &crystal_cove_regmap_config,
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.irq_chip = &crystal_cove_irq_chip,
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};
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