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[23.128.96.18]) by mx.google.com with ESMTP id i33si979965edd.421.2021.04.08.17.41.04; Thu, 08 Apr 2021 17:41:27 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233110AbhDIAiu (ORCPT + 99 others); Thu, 8 Apr 2021 20:38:50 -0400 Received: from alexa-out-sd-02.qualcomm.com ([199.106.114.39]:41715 "EHLO alexa-out-sd-02.qualcomm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232488AbhDIAip (ORCPT ); Thu, 8 Apr 2021 20:38:45 -0400 Received: from unknown (HELO ironmsg02-sd.qualcomm.com) ([10.53.140.142]) by alexa-out-sd-02.qualcomm.com with ESMTP; 08 Apr 2021 17:38:33 -0700 X-QCInternal: smtphost Received: from gurus-linux.qualcomm.com (HELO gurus-linux.localdomain) ([10.46.162.81]) by ironmsg02-sd.qualcomm.com with ESMTP; 08 Apr 2021 17:38:33 -0700 Received: by gurus-linux.localdomain (Postfix, from userid 383780) id 123B11A71; Thu, 8 Apr 2021 17:38:33 -0700 (PDT) From: Guru Das Srinagesh To: Lee Jones , Rob Herring , devicetree@vger.kernel.org Cc: Mark Brown , linux-arm-msm , Bjorn Andersson , linux-kernel@vger.kernel.org, Guru Das Srinagesh Subject: [PATCH 3/3] mfd: pm8008: Add driver for QCOM PM8008 PMIC Date: Thu, 8 Apr 2021 17:38:31 -0700 Message-Id: <8705a7bcb5f1aa86332a641557e0ae01100eeefa.1617927259.git.gurus@codeaurora.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: References: In-Reply-To: References: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Qualcomm Technologies, Inc. PM8008 is a dedicated camera PMIC that integrates all the necessary power management, housekeeping, and interface support functions into a single IC. Its key features include overtemperature protection, low-dropout linear regulators, GPIOs, and an I2C interface. Add an MFD driver to support it. Signed-off-by: Guru Das Srinagesh --- Side comment to help with code review: The function pm8008_init() in this file is necessitated by the instruction outlined in commit 84267d1b18abee ("regmap: regmap-irq: Remove default irq type setting from core") which says: > If default setting is needed this should be done via normal mechanisms or by > chip specific code if normal mechanisms are not suitable for some reason. drivers/mfd/Kconfig | 15 +++ drivers/mfd/Makefile | 1 + drivers/mfd/qcom-pm8008.c | 284 ++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 300 insertions(+) create mode 100644 drivers/mfd/qcom-pm8008.c diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index b74efa4..d75f937 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -2087,6 +2087,21 @@ config MFD_ACER_A500_EC The controller itself is ENE KB930, it is running firmware customized for the specific needs of the Acer A500 hardware. +config MFD_QCOM_PM8008 + tristate "QCOM PM8008 Power Management IC" + depends on I2C && OF + select REGMAP_I2C + select REGMAP_IRQ + help + Select this option to get support for the Qualcomm Technologies, Inc. + PM8008 PMIC chip. PM8008 is a dedicated camera PMIC that integrates + all the necessary power management, housekeeping, and interface + support functions into a single IC. This driver provides common + support for accessing the device by instantiating all the child nodes + under it in the device tree. Additional drivers must be enabled in + order to use the functionality of the device. + + menu "Multimedia Capabilities Port drivers" depends on ARCH_SA1100 diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile index 834f546..a5dda823 100644 --- a/drivers/mfd/Makefile +++ b/drivers/mfd/Makefile @@ -264,6 +264,7 @@ obj-$(CONFIG_MFD_ROHM_BD718XX) += rohm-bd718x7.o obj-$(CONFIG_MFD_STMFX) += stmfx.o obj-$(CONFIG_MFD_KHADAS_MCU) += khadas-mcu.o obj-$(CONFIG_MFD_ACER_A500_EC) += acer-ec-a500.o +obj-$(CONFIG_MFD_QCOM_PM8008) += qcom-pm8008.o obj-$(CONFIG_SGI_MFD_IOC3) += ioc3.o obj-$(CONFIG_MFD_SIMPLE_MFD_I2C) += simple-mfd-i2c.o diff --git a/drivers/mfd/qcom-pm8008.c b/drivers/mfd/qcom-pm8008.c new file mode 100644 index 0000000..9315389 --- /dev/null +++ b/drivers/mfd/qcom-pm8008.c @@ -0,0 +1,284 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2021, The Linux Foundation. All rights reserved. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define I2C_INTR_STATUS_BASE 0x0550 +#define INT_RT_STS_OFFSET 0x10 +#define INT_SET_TYPE_OFFSET 0x11 +#define INT_POL_HIGH_OFFSET 0x12 +#define INT_POL_LOW_OFFSET 0x13 +#define INT_LATCHED_CLR_OFFSET 0x14 +#define INT_EN_SET_OFFSET 0x15 +#define INT_EN_CLR_OFFSET 0x16 +#define INT_LATCHED_STS_OFFSET 0x18 + +enum { + PM8008_MISC, + PM8008_TEMP_ALARM, + PM8008_GPIO1, + PM8008_GPIO2, + PM8008_NUM_PERIPHS, +}; + +#define PM8008_PERIPH_0_BASE 0x900 +#define PM8008_PERIPH_1_BASE 0x2400 +#define PM8008_PERIPH_2_BASE 0xC000 +#define PM8008_PERIPH_3_BASE 0xC100 + +#define PM8008_TEMP_ALARM_ADDR PM8008_PERIPH_1_BASE +#define PM8008_GPIO1_ADDR PM8008_PERIPH_2_BASE +#define PM8008_GPIO2_ADDR PM8008_PERIPH_3_BASE + +#define PM8008_STATUS_BASE (PM8008_PERIPH_0_BASE | INT_LATCHED_STS_OFFSET) +#define PM8008_MASK_BASE (PM8008_PERIPH_0_BASE | INT_EN_SET_OFFSET) +#define PM8008_UNMASK_BASE (PM8008_PERIPH_0_BASE | INT_EN_CLR_OFFSET) +#define PM8008_TYPE_BASE (PM8008_PERIPH_0_BASE | INT_SET_TYPE_OFFSET) +#define PM8008_ACK_BASE (PM8008_PERIPH_0_BASE | INT_LATCHED_CLR_OFFSET) +#define PM8008_POLARITY_HI_BASE (PM8008_PERIPH_0_BASE | INT_POL_HIGH_OFFSET) +#define PM8008_POLARITY_LO_BASE (PM8008_PERIPH_0_BASE | INT_POL_LOW_OFFSET) + +#define ADDRESS_OFFSET(paddr, base) (paddr - base) + +#define PM8008_PERIPH_OFFSET(paddr) \ + ADDRESS_OFFSET(paddr, PM8008_PERIPH_0_BASE) + +struct pm8008_data { + struct device *dev; + struct regmap *regmap; + int irq; + struct regmap_irq_chip_data *irq_data; +}; + +static unsigned int p0_offs[] = {PM8008_PERIPH_OFFSET(PM8008_PERIPH_0_BASE)}; +static unsigned int p1_offs[] = {PM8008_PERIPH_OFFSET(PM8008_PERIPH_1_BASE)}; +static unsigned int p2_offs[] = {PM8008_PERIPH_OFFSET(PM8008_PERIPH_2_BASE)}; +static unsigned int p3_offs[] = {PM8008_PERIPH_OFFSET(PM8008_PERIPH_3_BASE)}; + +static struct regmap_irq_sub_irq_map pm8008_sub_reg_offsets[] = { + REGMAP_IRQ_MAIN_REG_OFFSET(p0_offs), + REGMAP_IRQ_MAIN_REG_OFFSET(p1_offs), + REGMAP_IRQ_MAIN_REG_OFFSET(p2_offs), + REGMAP_IRQ_MAIN_REG_OFFSET(p3_offs), +}; + +static unsigned int pm8008_virt_regs[] = { + PM8008_POLARITY_HI_BASE, + PM8008_POLARITY_LO_BASE, +}; + +enum { + POLARITY_HI_INDEX, + POLARITY_LO_INDEX, + PM8008_NUM_VIRT_REGS, +}; + +static struct regmap_irq pm8008_irqs[] = { + /* MISC IRQs*/ + REGMAP_IRQ_REG(PM8008_IRQ_MISC_UVLO, PM8008_MISC, BIT(0)), + REGMAP_IRQ_REG(PM8008_IRQ_MISC_OVLO, PM8008_MISC, BIT(1)), + REGMAP_IRQ_REG(PM8008_IRQ_MISC_OTST2, PM8008_MISC, BIT(2)), + REGMAP_IRQ_REG(PM8008_IRQ_MISC_OTST3, PM8008_MISC, BIT(3)), + REGMAP_IRQ_REG(PM8008_IRQ_MISC_LDO_OCP, PM8008_MISC, BIT(4)), + /* TEMP_ALARM IRQs */ + REGMAP_IRQ_REG(PM8008_IRQ_TEMP_ALARM, PM8008_TEMP_ALARM, BIT(0)), + /* GPIO1 IRQs */ + REGMAP_IRQ_REG(PM8008_IRQ_GPIO1, PM8008_GPIO1, BIT(0)), + /* GPIO2 IRQs */ + REGMAP_IRQ_REG(PM8008_IRQ_GPIO2, PM8008_GPIO2, BIT(0)), +}; + +static int pm8008_set_type_virt(unsigned int **virt_buf, + unsigned int type, unsigned long hwirq, + int reg) +{ + switch (type) { + case IRQ_TYPE_EDGE_FALLING: + case IRQ_TYPE_LEVEL_LOW: + virt_buf[POLARITY_HI_INDEX][reg] &= ~pm8008_irqs[hwirq].mask; + virt_buf[POLARITY_LO_INDEX][reg] |= pm8008_irqs[hwirq].mask; + break; + + case IRQ_TYPE_EDGE_RISING: + case IRQ_TYPE_LEVEL_HIGH: + virt_buf[POLARITY_HI_INDEX][reg] |= pm8008_irqs[hwirq].mask; + virt_buf[POLARITY_LO_INDEX][reg] &= ~pm8008_irqs[hwirq].mask; + break; + + case IRQ_TYPE_EDGE_BOTH: + virt_buf[POLARITY_HI_INDEX][reg] |= pm8008_irqs[hwirq].mask; + virt_buf[POLARITY_LO_INDEX][reg] |= pm8008_irqs[hwirq].mask; + break; + + default: + return -EINVAL; + } + + return 0; +} + +static struct regmap_irq_chip pm8008_irq_chip = { + .name = "pm8008_irq", + .main_status = I2C_INTR_STATUS_BASE, + .num_main_regs = 1, + .num_virt_regs = PM8008_NUM_VIRT_REGS, + .irqs = pm8008_irqs, + .num_irqs = ARRAY_SIZE(pm8008_irqs), + .num_regs = PM8008_NUM_PERIPHS, + .not_fixed_stride = true, + .sub_reg_offsets = pm8008_sub_reg_offsets, + .set_type_virt = pm8008_set_type_virt, + .status_base = PM8008_STATUS_BASE, + .mask_base = PM8008_MASK_BASE, + .unmask_base = PM8008_UNMASK_BASE, + .type_base = PM8008_TYPE_BASE, + .ack_base = PM8008_ACK_BASE, + .virt_reg_base = pm8008_virt_regs, + .num_type_reg = PM8008_NUM_PERIPHS, +}; + +static struct regmap_config qcom_mfd_regmap_cfg = { + .reg_bits = 16, + .val_bits = 8, + .max_register = 0xFFFF, +}; + +static int pm8008_init(struct pm8008_data *chip) +{ + int rc; + + /* + * Set TEMP_ALARM peripheral's TYPE so that the regmap-irq framework + * reads this as the default value instead of zero, the HW default. + * This is required to enable the writing of TYPE registers in + * regmap_irq_sync_unlock(). + */ + rc = regmap_write(chip->regmap, + (PM8008_TEMP_ALARM_ADDR | INT_SET_TYPE_OFFSET), + BIT(0)); + if (rc) + return rc; + + /* Do the same for GPIO1 and GPIO2 peripherals */ + rc = regmap_write(chip->regmap, + (PM8008_GPIO1_ADDR | INT_SET_TYPE_OFFSET), BIT(0)); + if (rc) + return rc; + + rc = regmap_write(chip->regmap, + (PM8008_GPIO2_ADDR | INT_SET_TYPE_OFFSET), BIT(0)); + + return rc; +} + +static int pm8008_probe_irq_peripherals(struct pm8008_data *chip, + int client_irq) +{ + int rc, i; + struct regmap_irq_type *type; + struct regmap_irq_chip_data *irq_data; + + rc = pm8008_init(chip); + if (rc) { + dev_err(chip->dev, "Init failed: %d\n", rc); + return rc; + } + + for (i = 0; i < ARRAY_SIZE(pm8008_irqs); i++) { + type = &pm8008_irqs[i].type; + + type->type_reg_offset = pm8008_irqs[i].reg_offset; + type->type_rising_val = pm8008_irqs[i].mask; + type->type_falling_val = pm8008_irqs[i].mask; + type->type_level_high_val = 0; + type->type_level_low_val = 0; + + if (type->type_reg_offset == PM8008_MISC) + type->types_supported = IRQ_TYPE_EDGE_RISING; + else + type->types_supported = (IRQ_TYPE_EDGE_BOTH | + IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW); + } + + rc = devm_regmap_add_irq_chip(chip->dev, chip->regmap, client_irq, + IRQF_SHARED, 0, &pm8008_irq_chip, &irq_data); + if (rc) { + dev_err(chip->dev, "Failed to add IRQ chip: %d\n", rc); + return rc; + } + + return 0; +} + +static int pm8008_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + int rc; + struct pm8008_data *chip; + + chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL); + if (!chip) + return -ENOMEM; + + chip->dev = &client->dev; + chip->regmap = devm_regmap_init_i2c(client, &qcom_mfd_regmap_cfg); + if (!chip->regmap) + return -ENODEV; + + i2c_set_clientdata(client, chip); + + if (of_find_property(chip->dev->of_node, "interrupt-controller", + NULL)) { + rc = pm8008_probe_irq_peripherals(chip, client->irq); + if (rc) + dev_err(chip->dev, "Failed to probe irq periphs: %d\n", + rc); + } + + return devm_of_platform_populate(chip->dev); +} + +static int pm8008_remove(struct i2c_client *client) +{ + i2c_set_clientdata(client, NULL); + + return 0; +} + +static const struct of_device_id pm8008_match[] = { + { .compatible = "qcom,pm8008", }, + { }, +}; + +static const struct i2c_device_id pm8008_id[] = { + { "pm8008", 0 }, + { }, +}; +MODULE_DEVICE_TABLE(i2c, pm8008_id); + +static struct i2c_driver pm8008_mfd_driver = { + .driver = { + .name = "mfd-pm8008", + .of_match_table = pm8008_match, + }, + .probe = pm8008_probe, + .remove = pm8008_remove, + .id_table = pm8008_id, +}; +module_i2c_driver(pm8008_mfd_driver); + +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("i2c:qcom-pm8008"); -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project