From patchwork Mon Jun 9 09:37:46 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Javier Martinez Canillas X-Patchwork-Id: 4321081 Return-Path: X-Original-To: patchwork-linux-samsung-soc@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 8F3B69F314 for ; Mon, 9 Jun 2014 09:40:10 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 7B209201F4 for ; Mon, 9 Jun 2014 09:40:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 22751201ED for ; Mon, 9 Jun 2014 09:40:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933359AbaFIJii (ORCPT ); Mon, 9 Jun 2014 05:38:38 -0400 Received: from bhuna.collabora.co.uk ([93.93.135.160]:49761 "EHLO bhuna.collabora.co.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934027AbaFIJic (ORCPT ); Mon, 9 Jun 2014 05:38:32 -0400 Received: from [127.0.0.1] (localhost [127.0.0.1]) (Authenticated sender: javier) with ESMTPSA id 4537B601825 From: Javier Martinez Canillas To: Lee Jones Cc: Samuel Ortiz , Mark Brown , Mike Turquette , Liam Girdwood , Alessandro Zummo , Kukjin Kim , Doug Anderson , Olof Johansson , Sjoerd Simons , Daniel Stone , Tomeu Vizoso , linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org, Javier Martinez Canillas Subject: [PATCH 1/5] mfd: Add driver for Maxim 77802 Power Management IC Date: Mon, 9 Jun 2014 11:37:46 +0200 Message-Id: <1402306670-17041-2-git-send-email-javier.martinez@collabora.co.uk> X-Mailer: git-send-email 2.0.0.rc2 In-Reply-To: <1402306670-17041-1-git-send-email-javier.martinez@collabora.co.uk> References: <1402306670-17041-1-git-send-email-javier.martinez@collabora.co.uk> Sender: linux-samsung-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org X-Spam-Status: No, score=-7.5 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Maxim MAX77802 is a power management chip that contains 10 high efficiency Buck regulators, 32 Low-dropout (LDO) regulators used to power up application processors and peripherals, a 2-channel 32kHz clock outputs, a Real-Time-Clock (RTC) and a I2C interface to program the individual regulators, clocks outputs and the RTC. This patch adds the core support for MAX77802 PMIC and is based on a driver added by Simon Glass to the Chrome OS kernel 3.8 tree. Signed-off-by: Javier Martinez Canillas --- Documentation/devicetree/bindings/mfd/max77802.txt | 88 ++++++ drivers/mfd/Kconfig | 13 + drivers/mfd/Makefile | 1 + drivers/mfd/max77802-irq.c | 332 +++++++++++++++++++++ drivers/mfd/max77802.c | 282 +++++++++++++++++ include/linux/mfd/max77802-private.h | 291 ++++++++++++++++++ include/linux/mfd/max77802.h | 124 ++++++++ 7 files changed, 1131 insertions(+) create mode 100644 Documentation/devicetree/bindings/mfd/max77802.txt create mode 100644 drivers/mfd/max77802-irq.c create mode 100644 drivers/mfd/max77802.c create mode 100644 include/linux/mfd/max77802-private.h create mode 100644 include/linux/mfd/max77802.h diff --git a/Documentation/devicetree/bindings/mfd/max77802.txt b/Documentation/devicetree/bindings/mfd/max77802.txt new file mode 100644 index 0000000..addf02e --- /dev/null +++ b/Documentation/devicetree/bindings/mfd/max77802.txt @@ -0,0 +1,88 @@ +Maxim MAX77802 multi-function device + +MAX77802 is a Mulitifunction device with PMIC, RTC and Charger on chip. It is +interfaced to host controller using i2c interface. PMIC, Charger and RTC +submodules are addressed using same i2c slave address + +This document describes the binding for mfd device and PMIC submodule. + +Binding for the built-in 32k clock generator block is defined separately +in bindings/clk/maxim,max77802.txt file. + +Required properties: +- compatible : Must be "maxim,max77802"; +- reg : Specifies the i2c slave address of PMIC block. +- interrupts : This i2c device has an IRQ line connected to the main SoC. +- interrupt-parent : The parent interrupt controller. + +Optional properties: +- max77802,pmic-buck-default-dvs-idx: We'll always write this DVS index in the + PMIC for BUCKs with DVS (Bucks 1-4, 6). + NOTE: at the moment these bindings don't include enough details for actual + GPIO-DVS--this just lets you choose which single slot to use. + +- max77802,pmic-buck-dvs-gpios: The DVS GPIOs. We'll try to set these GPIOs + to match pmic-buck-default-dvs-idx at probe time if they are defined. If + some or all of these GPIOs are not defined it's assumed that the board has + any missing GPIOs hardwired to match pmic-buck-default-dvs-idx. + +- max77802,pmic-buck-selb-gpios: GPIOs to enable DVS-GPIO for BUCKs. + Should be five values: 1, 2, 3, 4, 6. It is strongly suggested to include + these GPIOs if there's any chance that changing DVS GPIOs one line at a + time might glitch your DVS values. + +Optional node: +- voltage-regulators : The regulators of max77802 have to be instantiated + under subnode named "voltage-regulators" using the following format. + + regulator_name { + regulator-compatible = LDOn/BUCKn + standard regulator constraints.... + }; + refer Documentation/devicetree/bindings/regulator/regulator.txt + + The regulator-compatible property of regulator should initialized with string +to get matched with their hardware counterparts as follow: + + -LDOn : for LDOs, where n can lie in range 1 to 35. + example: LDO1, LDO2, LDO35. + -BUCKn : for BUCKs, where n can lie in range 1 to 10. + example: BUCK1, BUCK5, BUCK10. +Example: + + max77802@09 { + compatible = "maxim,max77802"; + interrupt-parent = <&wakeup_eint>; + interrupts = <26 0>; + reg = <0x09>; + #address-cells = <1>; + #size-cells = <0>; + + max77802,pmic-buck-default-dvs-idx = <1>; + max77802,pmic-buck-dvs-gpios = <&gpy7 6 0>, + <&gpj4 2 0>, + <&gpj4 3 0>; + max77802,pmic-buck-selb-gpios = <&gph0 2 0>, + <&gph0 3 0>, + <&gph0 4 0>, + <&gph0 5 0>, + <&gph0 6 0>; + + voltage-regulators { + ldo11_reg { + regulator-compatible = "LDO11"; + regulator-name = "vdd_ldo11"; + regulator-min-microvolt = <1900000>; + regulator-max-microvolt = <1900000>; + regulator-always-on; + }; + + buck1_reg { + regulator-compatible = "BUCK1"; + regulator-name = "vdd_mif"; + regulator-min-microvolt = <950000>; + regulator-max-microvolt = <1300000>; + regulator-always-on; + regulator-boot-on; + }; + }; diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index ee8204c..b8df9e4 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -392,6 +392,19 @@ config MFD_MAX77693 additional drivers must be enabled in order to use the functionality of the device. +config MFD_MAX77802 + bool "Maxim Integrated MAX77802 PMIC Support" + depends on I2C=y + select MFD_CORE + select REGMAP_I2C + select IRQ_DOMAIN + help + Say yes here to support for Maxim Integrated MAX77802. + This is a Power Management IC with RTC on chip. + This driver provides common support for accessing the device; + additional drivers must be enabled in order to use the functionality + of the device. + config MFD_MAX8907 tristate "Maxim Semiconductor MAX8907 PMIC Support" select MFD_CORE diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile index 8afedba..1a2a7ae 100644 --- a/drivers/mfd/Makefile +++ b/drivers/mfd/Makefile @@ -117,6 +117,7 @@ obj-$(CONFIG_MFD_DA9063) += da9063.o obj-$(CONFIG_MFD_MAX14577) += max14577.o obj-$(CONFIG_MFD_MAX77686) += max77686.o max77686-irq.o obj-$(CONFIG_MFD_MAX77693) += max77693.o max77693-irq.o +obj-$(CONFIG_MFD_MAX77802) += max77802.o max77802-irq.o obj-$(CONFIG_MFD_MAX8907) += max8907.o max8925-objs := max8925-core.o max8925-i2c.o obj-$(CONFIG_MFD_MAX8925) += max8925.o diff --git a/drivers/mfd/max77802-irq.c b/drivers/mfd/max77802-irq.c new file mode 100644 index 0000000..38a8ce7 --- /dev/null +++ b/drivers/mfd/max77802-irq.c @@ -0,0 +1,332 @@ +/* + * max77802-irq.c - Interrupt controller support for MAX77802 + * + * Copyright (C) 2013-2014 Google, Inc + * + * Copyright (C) 2012 Samsung Electronics Co.Ltd + * Chiwoong Byun + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * This driver is based on max8997-irq.c + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +enum { + MAX77802_DEBUG_IRQ_INFO = 1 << 0, + MAX77802_DEBUG_IRQ_MASK = 1 << 1, + MAX77802_DEBUG_IRQ_INT = 1 << 2, +}; + +static int debug_mask = 0; +module_param(debug_mask, int, 0); +MODULE_PARM_DESC(debug_mask, "Set debug_mask : 0x0=off 0x1=IRQ_INFO 0x2=IRQ_MASK 0x4=IRQ_INI)"); + +static const u8 max77802_mask_reg[] = { + [PMIC_INT1] = MAX77802_REG_INT1MSK, + [PMIC_INT2] = MAX77802_REG_INT2MSK, + [RTC_INT] = MAX77802_RTC_INTM, +}; + +struct max77802_irq_data { + int mask; + enum max77802_irq_source group; +}; + +#define DECLARE_IRQ(idx, _group, _mask) \ + [(idx)] = { .group = (_group), .mask = (_mask) } +static const struct max77802_irq_data max77802_irqs[] = { + DECLARE_IRQ(MAX77802_PMICIRQ_PWRONF, PMIC_INT1, 1 << 0), + DECLARE_IRQ(MAX77802_PMICIRQ_PWRONR, PMIC_INT1, 1 << 1), + DECLARE_IRQ(MAX77802_PMICIRQ_JIGONBF, PMIC_INT1, 1 << 2), + DECLARE_IRQ(MAX77802_PMICIRQ_JIGONBR, PMIC_INT1, 1 << 3), + DECLARE_IRQ(MAX77802_PMICIRQ_ACOKBF, PMIC_INT1, 1 << 4), + DECLARE_IRQ(MAX77802_PMICIRQ_ACOKBR, PMIC_INT1, 1 << 5), + DECLARE_IRQ(MAX77802_PMICIRQ_ONKEY1S, PMIC_INT1, 1 << 6), + DECLARE_IRQ(MAX77802_PMICIRQ_MRSTB, PMIC_INT1, 1 << 7), + DECLARE_IRQ(MAX77802_PMICIRQ_140C, PMIC_INT2, 1 << 0), + DECLARE_IRQ(MAX77802_PMICIRQ_120C, PMIC_INT2, 1 << 1), + DECLARE_IRQ(MAX77802_RTCIRQ_RTC60S, RTC_INT, 1 << 0), + DECLARE_IRQ(MAX77802_RTCIRQ_RTCA1, RTC_INT, 1 << 1), + DECLARE_IRQ(MAX77802_RTCIRQ_RTCA2, RTC_INT, 1 << 2), + DECLARE_IRQ(MAX77802_RTCIRQ_SMPL, RTC_INT, 1 << 3), + DECLARE_IRQ(MAX77802_RTCIRQ_RTC1S, RTC_INT, 1 << 4), + DECLARE_IRQ(MAX77802_RTCIRQ_WTSR, RTC_INT, 1 << 5), +}; + +static void max77802_irq_lock(struct irq_data *data) +{ + struct max77802_dev *max77802 = irq_get_chip_data(data->irq); + + if (debug_mask & MAX77802_DEBUG_IRQ_MASK) + pr_info("%s\n", __func__); + + mutex_lock(&max77802->irqlock); +} + +static void max77802_irq_sync_unlock(struct irq_data *data) +{ + struct max77802_dev *max77802 = irq_get_chip_data(data->irq); + int i; + + for (i = 0; i < MAX77802_IRQ_GROUP_NR; i++) { + u8 mask_reg = max77802_mask_reg[i]; + + if (debug_mask & MAX77802_DEBUG_IRQ_MASK) + pr_debug("%s: mask_reg[%d]=0x%x, cur=0x%x\n", + __func__, i, mask_reg, max77802->irq_masks_cur[i]); + + if (mask_reg == MAX77802_REG_INVALID || + IS_ERR_OR_NULL(max77802->regmap)) + continue; + + max77802->irq_masks_cache[i] = max77802->irq_masks_cur[i]; + + regmap_write(max77802->regmap, mask_reg, + max77802->irq_masks_cur[i]); + } + + mutex_unlock(&max77802->irqlock); +} + +static const inline struct max77802_irq_data *to_max77802_irq(int irq) +{ + struct irq_data *data = irq_get_irq_data(irq); + return &max77802_irqs[data->hwirq]; +} + +static void max77802_irq_mask(struct irq_data *data) +{ + struct max77802_dev *max77802 = irq_get_chip_data(data->irq); + const struct max77802_irq_data *irq_data = to_max77802_irq(data->irq); + + max77802->irq_masks_cur[irq_data->group] |= irq_data->mask; + + if (debug_mask & MAX77802_DEBUG_IRQ_MASK) + pr_info("%s: group=%d, cur=0x%x\n", + __func__, irq_data->group, + max77802->irq_masks_cur[irq_data->group]); +} + +static void max77802_irq_unmask(struct irq_data *data) +{ + struct max77802_dev *max77802 = irq_get_chip_data(data->irq); + const struct max77802_irq_data *irq_data = to_max77802_irq(data->irq); + + max77802->irq_masks_cur[irq_data->group] &= ~irq_data->mask; + + if (debug_mask & MAX77802_DEBUG_IRQ_MASK) + pr_info("%s: group=%d, cur=0x%x\n", + __func__, irq_data->group, + max77802->irq_masks_cur[irq_data->group]); +} + +static int max77802_irq_set_wake(struct irq_data *data, unsigned int on) +{ + struct max77802_dev *max77802 = irq_get_chip_data(data->irq); + + if (device_may_wakeup(max77802->dev)) { + if (on) + return enable_irq_wake(max77802->irq); + else + return disable_irq_wake(max77802->irq); + } else if (on) { + dev_warn(max77802->dev, + "Child requested wakeup but wakeup disabled\n"); + return -ENXIO; + } + return 0; +} + +static struct irq_chip max77802_irq_chip = { + .name = "max77802", + .irq_bus_lock = max77802_irq_lock, + .irq_bus_sync_unlock = max77802_irq_sync_unlock, + .irq_mask = max77802_irq_mask, + .irq_unmask = max77802_irq_unmask, + .irq_set_wake = max77802_irq_set_wake, +}; + +static irqreturn_t max77802_irq_thread(int irq, void *data) +{ + struct max77802_dev *max77802 = data; + unsigned int irq_reg[MAX77802_IRQ_GROUP_NR] = {}; + unsigned int irq_src; + int ret; + int i, cur_irq; + + ret = regmap_read(max77802->regmap, MAX77802_REG_INTSRC, &irq_src); + if (ret < 0) { + dev_err(max77802->dev, "Failed to read interrupt source: %d\n", + ret); + return IRQ_NONE; + } + + if (debug_mask & MAX77802_DEBUG_IRQ_INT) + pr_info("%s: irq_src=0x%x\n", __func__, irq_src); + + if (irq_src == MAX77802_IRQSRC_PMIC) { + ret = regmap_bulk_read(max77802->regmap, + MAX77802_REG_INT1, irq_reg, 2); + if (ret < 0) { + dev_err(max77802->dev, "Failed to read interrupt source: %d\n", + ret); + return IRQ_NONE; + } + + if (debug_mask & MAX77802_DEBUG_IRQ_INT) + pr_info("%s: int1=0x%x, int2=0x%x\n", __func__, + irq_reg[PMIC_INT1], irq_reg[PMIC_INT2]); + } + + if (irq_src & MAX77802_IRQSRC_RTC) { + ret = regmap_read(max77802->regmap, + MAX77802_RTC_INT, &irq_reg[RTC_INT]); + if (ret < 0) { + dev_err(max77802->dev, "Failed to read interrupt source: %d\n", + ret); + return IRQ_NONE; + } + + if (debug_mask & MAX77802_DEBUG_IRQ_INT) + pr_info("%s: rtc int=0x%x\n", __func__, + irq_reg[RTC_INT]); + + } + + for (i = 0; i < MAX77802_IRQ_GROUP_NR; i++) + irq_reg[i] &= ~max77802->irq_masks_cur[i]; + + for (i = 0; i < MAX77802_IRQ_NR; i++) { + if (irq_reg[max77802_irqs[i].group] & max77802_irqs[i].mask) { + cur_irq = irq_find_mapping(max77802->irq_domain, i); + if (cur_irq) + handle_nested_irq(cur_irq); + } + } + + return IRQ_HANDLED; +} + +static int max77802_irq_domain_map(struct irq_domain *d, unsigned int irq, + irq_hw_number_t hw) +{ + struct max77802_dev *max77802 = d->host_data; + + irq_set_chip_data(irq, max77802); + irq_set_chip_and_handler(irq, &max77802_irq_chip, handle_simple_irq); + irq_set_nested_thread(irq, 1); + irq_set_parent(irq, max77802->irq); +#ifdef CONFIG_ARM + set_irq_flags(irq, IRQF_VALID); +#else + irq_set_noprobe(irq); +#endif + return 0; +} + +static struct irq_domain_ops max77802_irq_domain_ops = { + .map = max77802_irq_domain_map, +}; + +int max77802_irq_init(struct max77802_dev *max77802) +{ + struct irq_domain *domain; + int i; + int ret; + int val; + + mutex_init(&max77802->irqlock); + + if (max77802->irq_gpio && !max77802->irq) { + max77802->irq = gpio_to_irq(max77802->irq_gpio); + + if (debug_mask & MAX77802_DEBUG_IRQ_INT) { + ret = gpio_request(max77802->irq_gpio, "pmic_irq"); + if (ret < 0) { + dev_err(max77802->dev, + "Failed to request gpio %d with ret:" + "%d\n", max77802->irq_gpio, ret); + return IRQ_NONE; + } + + gpio_direction_input(max77802->irq_gpio); + val = gpio_get_value(max77802->irq_gpio); + gpio_free(max77802->irq_gpio); + pr_info("%s: gpio_irq=%x\n", __func__, val); + } + } + + if (!max77802->irq) { + dev_err(max77802->dev, "irq is not specified\n"); + return -ENODEV; + } + + /* Mask individual interrupt sources */ + for (i = 0; i < MAX77802_IRQ_GROUP_NR; i++) { + max77802->irq_masks_cur[i] = 0xff; + max77802->irq_masks_cache[i] = 0xff; + + if (IS_ERR_OR_NULL(max77802->regmap)) + continue; + if (max77802_mask_reg[i] == MAX77802_REG_INVALID) + continue; + + regmap_write(max77802->regmap, max77802_mask_reg[i], 0xff); + } + domain = irq_domain_add_linear(NULL, MAX77802_IRQ_NR, + &max77802_irq_domain_ops, max77802); + if (!domain) { + dev_err(max77802->dev, "could not create irq domain\n"); + return -ENODEV; + } + max77802->irq_domain = domain; + + ret = request_threaded_irq(max77802->irq, NULL, max77802_irq_thread, + IRQF_TRIGGER_FALLING | IRQF_ONESHOT, + "max77802-irq", max77802); + + if (ret) + dev_err(max77802->dev, "Failed to request IRQ %d: %d\n", + max77802->irq, ret); + + + if (debug_mask & MAX77802_DEBUG_IRQ_INFO) + pr_info("%s-\n", __func__); + + return 0; +} + +void max77802_irq_exit(struct max77802_dev *max77802) +{ + if (max77802->irq) + free_irq(max77802->irq, max77802); +} + +int max77802_irq_resume(struct max77802_dev *max77802) +{ + /* + * The IRQ that woke us up may still need to be ACK'ed on resume. + * If it isn't ever ACK'ed, future IRQs may not be delivered. + */ + if (max77802->irq) + max77802_irq_thread(0, max77802); + + return 0; +} diff --git a/drivers/mfd/max77802.c b/drivers/mfd/max77802.c new file mode 100644 index 0000000..59696dd --- /dev/null +++ b/drivers/mfd/max77802.c @@ -0,0 +1,282 @@ +/* + * max77802.c - mfd core driver for the Maxim 77802 + * + * Copyright (C) 2013-2014 Google, Inc + * Simon Glass + * + * Copyright (C) 2012 Samsung Electronics + * Chiwoong Byun + * Jonghwa Lee + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * This driver is based on max8997.c + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +static const struct mfd_cell max77802_devs[] = { + { .name = "max77802-pmic", }, +}; + +static bool max77802_pmic_is_accessible_reg(struct device *dev, + unsigned int reg) +{ + return (reg >= MAX77802_REG_DEVICE_ID && reg < MAX77802_REG_PMIC_END); +} + +static bool max77802_rtc_is_accessible_reg(struct device *dev, + unsigned int reg) +{ + return (reg >= MAX77802_RTC_INT && reg < MAX77802_RTC_END); +} + +static bool max77802_is_accessible_reg(struct device *dev, unsigned int reg) +{ + return (max77802_pmic_is_accessible_reg(dev, reg) || + max77802_rtc_is_accessible_reg(dev, reg)); +} + +static bool max77802_pmic_is_precious_reg(struct device *dev, unsigned int reg) +{ + return (reg == MAX77802_REG_INTSRC || reg == MAX77802_REG_INT1 || + reg == MAX77802_REG_INT2); +} + +static bool max77802_rtc_is_precious_reg(struct device *dev, unsigned int reg) +{ + return (reg == MAX77802_RTC_INT || + reg == MAX77802_RTC_UPDATE0 || + reg == MAX77802_RTC_UPDATE1); +} + +static bool max77802_is_precious_reg(struct device *dev, unsigned int reg) +{ + return (max77802_pmic_is_precious_reg(dev, reg) || + max77802_rtc_is_precious_reg(dev, reg)); +} + +static bool max77802_pmic_is_volatile_reg(struct device *dev, unsigned int reg) +{ + return (max77802_is_precious_reg(dev, reg) || + reg == MAX77802_REG_STATUS1 || reg == MAX77802_REG_STATUS2 || + reg == MAX77802_REG_PWRON); +} + +static bool max77802_rtc_is_volatile_reg(struct device *dev, unsigned int reg) +{ + return (max77802_rtc_is_precious_reg(dev, reg) || + reg == MAX77802_RTC_SEC || + reg == MAX77802_RTC_MIN || + reg == MAX77802_RTC_HOUR || + reg == MAX77802_RTC_WEEKDAY || + reg == MAX77802_RTC_MONTH || + reg == MAX77802_RTC_YEAR || + reg == MAX77802_RTC_DATE); +} + +static bool max77802_is_volatile_reg(struct device *dev, unsigned int reg) +{ + return (max77802_pmic_is_volatile_reg(dev, reg) || + max77802_rtc_is_volatile_reg(dev, reg)); +} + +static struct regmap_config max77802_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .writeable_reg = max77802_is_accessible_reg, + .readable_reg = max77802_is_accessible_reg, + .precious_reg = max77802_is_precious_reg, + .volatile_reg = max77802_is_volatile_reg, + .name = "max77802-pmic", + .cache_type = REGCACHE_RBTREE, +}; + +#ifdef CONFIG_OF +static struct of_device_id max77802_pmic_dt_match[] = { + {.compatible = "maxim,max77802", .data = NULL}, + {}, +}; + +static void max77802_dt_parse_dvs_gpio(struct device *dev, + struct max77802_platform_data *pd, + struct device_node *np) +{ + int i; + + /* + * NOTE: we don't consider GPIO errors fatal; board may have some lines + * directly pulled high or low and thus doesn't specify them. + */ + for (i = 0; i < ARRAY_SIZE(pd->buck_gpio_dvs); i++) + pd->buck_gpio_dvs[i] = + of_get_named_gpio(np, + "max77802,pmic-buck-dvs-gpios", i); + + for (i = 0; i < ARRAY_SIZE(pd->buck_gpio_selb); i++) + pd->buck_gpio_selb[i] = + of_get_named_gpio(np, + "max77802,pmic-buck-selb-gpios", i); +} + +static struct max77802_platform_data *max77802_i2c_parse_dt_pdata(struct device + *dev) +{ + struct device_node *np = dev->of_node; + struct max77802_platform_data *pd; + + pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL); + if (!pd) { + dev_err(dev, "could not allocate memory for pdata\n"); + return NULL; + } + + /* Read default index and ignore errors, since default is 0 */ + of_property_read_u32(np, "max77802,pmic-buck-default-dvs-idx", + &pd->buck_default_idx); + + max77802_dt_parse_dvs_gpio(dev, pd, np); + + dev->platform_data = pd; + return pd; +} +#else +static struct max77802_platform_data *max77802_i2c_parse_dt_pdata(struct device + *dev) +{ + return 0; +} +#endif + +static int max77802_i2c_probe(struct i2c_client *i2c, + const struct i2c_device_id *id) +{ + struct max77802_dev *max77802 = NULL; + struct max77802_platform_data *pdata = dev_get_platdata(&i2c->dev); + unsigned int data; + int ret = 0; + + if (i2c->dev.of_node) + pdata = max77802_i2c_parse_dt_pdata(&i2c->dev); + + if (!pdata) { + dev_err(&i2c->dev, "No platform data found.\n"); + return -EIO; + } + + max77802 = devm_kzalloc(&i2c->dev, sizeof(struct max77802_dev), + GFP_KERNEL); + if (max77802 == NULL) + return -ENOMEM; + + i2c_set_clientdata(i2c, max77802); + max77802->dev = &i2c->dev; + max77802->i2c = i2c; + max77802->type = id->driver_data; + + max77802->wakeup = pdata->wakeup; + max77802->irq_gpio = pdata->irq_gpio; + max77802->irq = i2c->irq; + + max77802->regmap = devm_regmap_init_i2c(i2c, &max77802_regmap_config); + if (IS_ERR(max77802->regmap)) { + ret = PTR_ERR(max77802->regmap); + dev_err(max77802->dev, "Failed to allocate register map: %d\n", + ret); + return ret; + } + + if (regmap_read(max77802->regmap, + MAX77802_REG_DEVICE_ID, &data) < 0) { + dev_err(max77802->dev, + "device not found on this channel (this is not an error)\n"); + return -ENODEV; + } else { + dev_info(max77802->dev, "device found\n"); + } + + max77802_irq_init(max77802); + + ret = mfd_add_devices(max77802->dev, -1, max77802_devs, + ARRAY_SIZE(max77802_devs), NULL, 0, NULL); + if (ret < 0) + mfd_remove_devices(max77802->dev); + + return ret; +} + +static int max77802_i2c_remove(struct i2c_client *i2c) +{ + struct max77802_dev *max77802 = i2c_get_clientdata(i2c); + + mfd_remove_devices(max77802->dev); + + return 0; +} + +static const struct i2c_device_id max77802_i2c_id[] = { + { "max77802", TYPE_MAX77802 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, max77802_i2c_id); + +#ifdef CONFIG_PM_SLEEP +static int max77802_resume(struct device *dev) +{ + struct i2c_client *i2c = container_of(dev, struct i2c_client, dev); + struct max77802_dev *max77802 = i2c_get_clientdata(i2c); + + max77802_irq_resume(max77802); + + return 0; +} +#endif + +static SIMPLE_DEV_PM_OPS(max77802_pm_ops, NULL, max77802_resume); + +static struct i2c_driver max77802_i2c_driver = { + .driver = { + .name = "max77802", + .owner = THIS_MODULE, + .pm = &max77802_pm_ops, + .of_match_table = of_match_ptr(max77802_pmic_dt_match), + }, + .probe = max77802_i2c_probe, + .remove = max77802_i2c_remove, + .id_table = max77802_i2c_id, +}; + +static int __init max77802_i2c_init(void) +{ + return i2c_add_driver(&max77802_i2c_driver); +} +/* init early so consumer devices can complete system boot */ +subsys_initcall(max77802_i2c_init); + +static void __exit max77802_i2c_exit(void) +{ + i2c_del_driver(&max77802_i2c_driver); +} +module_exit(max77802_i2c_exit); + +MODULE_DESCRIPTION("MAXIM 77802 multi-function core driver"); +MODULE_AUTHOR("Simon Glass "); +MODULE_LICENSE("GPL"); diff --git a/include/linux/mfd/max77802-private.h b/include/linux/mfd/max77802-private.h new file mode 100644 index 0000000..7db5225 --- /dev/null +++ b/include/linux/mfd/max77802-private.h @@ -0,0 +1,291 @@ +/* + * max77802-private.h - Voltage regulator driver for the Maxim 77802 + * + * Copyright (C) 2012 Samsung Electrnoics + * Chiwoong Byun + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +#ifndef __LINUX_MFD_MAX77802_PRIV_H +#define __LINUX_MFD_MAX77802_PRIV_H + +#include +#include +#include + +#define MAX77802_REG_INVALID (0xff) + +enum max77802_pmic_reg { + MAX77802_REG_DEVICE_ID = 0x00, + MAX77802_REG_INTSRC = 0x01, + MAX77802_REG_INT1 = 0x02, + MAX77802_REG_INT2 = 0x03, + + MAX77802_REG_INT1MSK = 0x04, + MAX77802_REG_INT2MSK = 0x05, + + MAX77802_REG_STATUS1 = 0x06, + MAX77802_REG_STATUS2 = 0x07, + + MAX77802_REG_PWRON = 0x08, + /* Reserved: 0x09 */ + MAX77802_REG_MRSTB = 0x0A, + MAX77802_REG_EPWRHOLD = 0x0B, + /* Reserved: 0x0C-0x0D */ + MAX77802_REG_BOOSTCTRL = 0x0E, + MAX77802_REG_BOOSTOUT = 0x0F, + + MAX77802_REG_BUCK1CTRL = 0x10, + MAX77802_REG_BUCK1DVS1 = 0x11, + MAX77802_REG_BUCK1DVS2 = 0x12, + MAX77802_REG_BUCK1DVS3 = 0x13, + MAX77802_REG_BUCK1DVS4 = 0x14, + MAX77802_REG_BUCK1DVS5 = 0x15, + MAX77802_REG_BUCK1DVS6 = 0x16, + MAX77802_REG_BUCK1DVS7 = 0x17, + MAX77802_REG_BUCK1DVS8 = 0x18, + /* Reserved: 0x19 */ + MAX77802_REG_BUCK2CTRL1 = 0x1A, + MAX77802_REG_BUCK2CTRL2 = 0x1B, + MAX77802_REG_BUCK2PHTRAN = 0x1C, + MAX77802_REG_BUCK2DVS1 = 0x1D, + MAX77802_REG_BUCK2DVS2 = 0x1E, + MAX77802_REG_BUCK2DVS3 = 0x1F, + MAX77802_REG_BUCK2DVS4 = 0x20, + MAX77802_REG_BUCK2DVS5 = 0x21, + MAX77802_REG_BUCK2DVS6 = 0x22, + MAX77802_REG_BUCK2DVS7 = 0x23, + MAX77802_REG_BUCK2DVS8 = 0x24, + /* Reserved: 0x25-0x26 */ + MAX77802_REG_BUCK3CTRL1 = 0x27, + MAX77802_REG_BUCK3DVS1 = 0x28, + MAX77802_REG_BUCK3DVS2 = 0x29, + MAX77802_REG_BUCK3DVS3 = 0x2A, + MAX77802_REG_BUCK3DVS4 = 0x2B, + MAX77802_REG_BUCK3DVS5 = 0x2C, + MAX77802_REG_BUCK3DVS6 = 0x2D, + MAX77802_REG_BUCK3DVS7 = 0x2E, + MAX77802_REG_BUCK3DVS8 = 0x2F, + /* Reserved: 0x30-0x36 */ + MAX77802_REG_BUCK4CTRL1 = 0x37, + MAX77802_REG_BUCK4DVS1 = 0x38, + MAX77802_REG_BUCK4DVS2 = 0x39, + MAX77802_REG_BUCK4DVS3 = 0x3A, + MAX77802_REG_BUCK4DVS4 = 0x3B, + MAX77802_REG_BUCK4DVS5 = 0x3C, + MAX77802_REG_BUCK4DVS6 = 0x3D, + MAX77802_REG_BUCK4DVS7 = 0x3E, + MAX77802_REG_BUCK4DVS8 = 0x3F, + /* Reserved: 0x40 */ + MAX77802_REG_BUCK5CTRL = 0x41, + MAX77802_REG_BUCK5OUT = 0x42, + /* Reserved: 0x43 */ + MAX77802_REG_BUCK6CTRL = 0x44, + MAX77802_REG_BUCK6DVS1 = 0x45, + MAX77802_REG_BUCK6DVS2 = 0x46, + MAX77802_REG_BUCK6DVS3 = 0x47, + MAX77802_REG_BUCK6DVS4 = 0x48, + MAX77802_REG_BUCK6DVS5 = 0x49, + MAX77802_REG_BUCK6DVS6 = 0x4A, + MAX77802_REG_BUCK6DVS7 = 0x4B, + MAX77802_REG_BUCK6DVS8 = 0x4C, + /* Reserved: 0x4D */ + MAX77802_REG_BUCK7CTRL = 0x4E, + MAX77802_REG_BUCK7OUT = 0x4F, + /* Reserved: 0x50 */ + MAX77802_REG_BUCK8CTRL = 0x51, + MAX77802_REG_BUCK8OUT = 0x52, + /* Reserved: 0x53 */ + MAX77802_REG_BUCK9CTRL = 0x54, + MAX77802_REG_BUCK9OUT = 0x55, + /* Reserved: 0x56 */ + MAX77802_REG_BUCK10CTRL = 0x57, + MAX77802_REG_BUCK10OUT = 0x58, + + /* Reserved: 0x59-0x5F */ + + MAX77802_REG_LDO1CTRL1 = 0x60, + MAX77802_REG_LDO2CTRL1 = 0x61, + MAX77802_REG_LDO3CTRL1 = 0x62, + MAX77802_REG_LDO4CTRL1 = 0x63, + MAX77802_REG_LDO5CTRL1 = 0x64, + MAX77802_REG_LDO6CTRL1 = 0x65, + MAX77802_REG_LDO7CTRL1 = 0x66, + MAX77802_REG_LDO8CTRL1 = 0x67, + MAX77802_REG_LDO9CTRL1 = 0x68, + MAX77802_REG_LDO10CTRL1 = 0x69, + MAX77802_REG_LDO11CTRL1 = 0x6A, + MAX77802_REG_LDO12CTRL1 = 0x6B, + MAX77802_REG_LDO13CTRL1 = 0x6C, + MAX77802_REG_LDO14CTRL1 = 0x6D, + MAX77802_REG_LDO15CTRL1 = 0x6E, + /* Reserved: 0x6F */ + MAX77802_REG_LDO17CTRL1 = 0x70, + MAX77802_REG_LDO18CTRL1 = 0x71, + MAX77802_REG_LDO19CTRL1 = 0x72, + MAX77802_REG_LDO20CTRL1 = 0x73, + MAX77802_REG_LDO21CTRL1 = 0x74, + MAX77802_REG_LDO22CTRL1 = 0x75, + MAX77802_REG_LDO23CTRL1 = 0x76, + MAX77802_REG_LDO24CTRL1 = 0x77, + MAX77802_REG_LDO25CTRL1 = 0x78, + MAX77802_REG_LDO26CTRL1 = 0x79, + MAX77802_REG_LDO27CTRL1 = 0x7A, + MAX77802_REG_LDO28CTRL1 = 0x7B, + MAX77802_REG_LDO29CTRL1 = 0x7C, + MAX77802_REG_LDO30CTRL1 = 0x7D, + /* Reserved: 0x7E */ + MAX77802_REG_LDO32CTRL1 = 0x7F, + MAX77802_REG_LDO33CTRL1 = 0x80, + MAX77802_REG_LDO34CTRL1 = 0x81, + MAX77802_REG_LDO35CTRL1 = 0x82, + /* Reserved: 0x83-0x8F */ + MAX77802_REG_LDO1CTRL2 = 0x90, + MAX77802_REG_LDO2CTRL2 = 0x91, + MAX77802_REG_LDO3CTRL2 = 0x92, + MAX77802_REG_LDO4CTRL2 = 0x93, + MAX77802_REG_LDO5CTRL2 = 0x94, + MAX77802_REG_LDO6CTRL2 = 0x95, + MAX77802_REG_LDO7CTRL2 = 0x96, + MAX77802_REG_LDO8CTRL2 = 0x97, + MAX77802_REG_LDO9CTRL2 = 0x98, + MAX77802_REG_LDO10CTRL2 = 0x99, + MAX77802_REG_LDO11CTRL2 = 0x9A, + MAX77802_REG_LDO12CTRL2 = 0x9B, + MAX77802_REG_LDO13CTRL2 = 0x9C, + MAX77802_REG_LDO14CTRL2 = 0x9D, + MAX77802_REG_LDO15CTRL2 = 0x9E, + /* Reserved: 0x9F */ + MAX77802_REG_LDO17CTRL2 = 0xA0, + MAX77802_REG_LDO18CTRL2 = 0xA1, + MAX77802_REG_LDO19CTRL2 = 0xA2, + MAX77802_REG_LDO20CTRL2 = 0xA3, + MAX77802_REG_LDO21CTRL2 = 0xA4, + MAX77802_REG_LDO22CTRL2 = 0xA5, + MAX77802_REG_LDO23CTRL2 = 0xA6, + MAX77802_REG_LDO24CTRL2 = 0xA7, + MAX77802_REG_LDO25CTRL2 = 0xA8, + MAX77802_REG_LDO26CTRL2 = 0xA9, + MAX77802_REG_LDO27CTRL2 = 0xAA, + MAX77802_REG_LDO28CTRL2 = 0xAB, + MAX77802_REG_LDO29CTRL2 = 0xAC, + MAX77802_REG_LDO30CTRL2 = 0xAD, + /* Reserved: 0xAE */ + MAX77802_REG_LDO32CTRL2 = 0xAF, + MAX77802_REG_LDO33CTRL2 = 0xB0, + MAX77802_REG_LDO34CTRL2 = 0xB1, + MAX77802_REG_LDO35CTRL2 = 0xB2, + /* Reserved: 0xB3 */ + + MAX77802_REG_BBAT_CHG = 0xB4, + MAX77802_REG_32KHZ = 0xB5, + + MAX77802_REG_PMIC_END = 0xB6, +}; + +enum max77802_rtc_reg { + MAX77802_RTC_INT = 0xC0, + MAX77802_RTC_INTM = 0xC1, + MAX77802_RTC_CONTROLM = 0xC2, + MAX77802_RTC_CONTROL = 0xC3, + MAX77802_RTC_UPDATE0 = 0xC4, + MAX77802_RTC_UPDATE1 = 0xC5, + MAX77802_WTSR_SMPL_CNTL = 0xC6, + MAX77802_RTC_SEC = 0xC7, + MAX77802_RTC_MIN = 0xC8, + MAX77802_RTC_HOUR = 0xC9, + MAX77802_RTC_WEEKDAY = 0xCA, + MAX77802_RTC_MONTH = 0xCB, + MAX77802_RTC_YEAR = 0xCC, + MAX77802_RTC_DATE = 0xCD, + MAX77802_RTC_AE1 = 0xCE, + MAX77802_ALARM1_SEC = 0xCF, + MAX77802_ALARM1_MIN = 0xD0, + MAX77802_ALARM1_HOUR = 0xD1, + MAX77802_ALARM1_WEEKDAY = 0xD2, + MAX77802_ALARM1_MONTH = 0xD3, + MAX77802_ALARM1_YEAR = 0xD4, + MAX77802_ALARM1_DATE = 0xD5, + MAX77802_RTC_AE2 = 0xD6, + MAX77802_ALARM2_SEC = 0xD7, + MAX77802_ALARM2_MIN = 0xD8, + MAX77802_ALARM2_HOUR = 0xD9, + MAX77802_ALARM2_WEEKDAY = 0xDA, + MAX77802_ALARM2_MONTH = 0xDB, + MAX77802_ALARM2_YEAR = 0xDC, + MAX77802_ALARM2_DATE = 0xDD, + + MAX77802_RTC_END = 0xDF, +}; + +#define MAX77802_IRQSRC_PMIC (0) +#define MAX77802_IRQSRC_RTC (1 << 0) + +enum max77802_irq_source { + PMIC_INT1 = 0, + PMIC_INT2, + RTC_INT, + + MAX77802_IRQ_GROUP_NR, +}; + +enum max77802_irq { + MAX77802_PMICIRQ_PWRONF, + MAX77802_PMICIRQ_PWRONR, + MAX77802_PMICIRQ_JIGONBF, + MAX77802_PMICIRQ_JIGONBR, + MAX77802_PMICIRQ_ACOKBF, + MAX77802_PMICIRQ_ACOKBR, + MAX77802_PMICIRQ_ONKEY1S, + MAX77802_PMICIRQ_MRSTB, + + MAX77802_PMICIRQ_140C, + MAX77802_PMICIRQ_120C, + + MAX77802_RTCIRQ_RTC60S, + MAX77802_RTCIRQ_RTCA1, + MAX77802_RTCIRQ_RTCA2, + MAX77802_RTCIRQ_SMPL, + MAX77802_RTCIRQ_RTC1S, + MAX77802_RTCIRQ_WTSR, + + MAX77802_IRQ_NR, +}; + +struct max77802_dev { + struct device *dev; + struct i2c_client *i2c; /* 0x09 / PMIC, Battery Control and RTC */ + + int type; + + struct regmap *regmap; /* regmap for mfd and rtc devices */ + + struct irq_domain *irq_domain; + + int irq; + int irq_gpio; + bool wakeup; + struct mutex irqlock; + int irq_masks_cur[MAX77802_IRQ_GROUP_NR]; + int irq_masks_cache[MAX77802_IRQ_GROUP_NR]; +}; + +enum max77802_types { + TYPE_MAX77802, +}; + +extern int max77802_irq_init(struct max77802_dev *max77802); +extern void max77802_irq_exit(struct max77802_dev *max77802); +extern int max77802_irq_resume(struct max77802_dev *max77802); + +#endif /* __LINUX_MFD_MAX77802_PRIV_H */ diff --git a/include/linux/mfd/max77802.h b/include/linux/mfd/max77802.h new file mode 100644 index 0000000..3c08b2a --- /dev/null +++ b/include/linux/mfd/max77802.h @@ -0,0 +1,124 @@ +/* + * max77802.h - Driver for the Maxim 77802 + * + * Copyright (c) 2013-2014 Google, Inc + * + * Copyright (C) 2012 Samsung Electrnoics + * Chiwoong Byun + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * This driver is based on max8997.h + * + * MAX77802 has PMIC, RTC devices. + * The devices share the same I2C bus and included in + * this mfd driver. + */ + +#ifndef __LINUX_MFD_MAX77802_H +#define __LINUX_MFD_MAX77802_H + +#include + +/* MAX77802 regulator IDs - LDOS must come before BUCKs */ +enum max77802_regulators { + MAX77802_LDO1 = 0, + MAX77802_LDO2, + MAX77802_LDO3, + MAX77802_LDO4, + MAX77802_LDO5, + MAX77802_LDO6, + MAX77802_LDO7, + MAX77802_LDO8, + MAX77802_LDO9, + MAX77802_LDO10, + MAX77802_LDO11, + MAX77802_LDO12, + MAX77802_LDO13, + MAX77802_LDO14, + MAX77802_LDO15, + MAX77802_LDO16, + MAX77802_LDO17, + MAX77802_LDO18, + MAX77802_LDO19, + MAX77802_LDO20, + MAX77802_LDO21, + MAX77802_LDO22, + MAX77802_LDO23, + MAX77802_LDO24, + MAX77802_LDO25, + MAX77802_LDO26, + MAX77802_LDO27, + MAX77802_LDO28, + MAX77802_LDO29, + MAX77802_LDO30, + MAX77802_LDO31, + MAX77802_LDO32, + MAX77802_LDO33, + MAX77802_LDO34, + MAX77802_LDO35, + MAX77802_BUCK1, + MAX77802_BUCK2, + MAX77802_BUCK3, + MAX77802_BUCK4, + MAX77802_BUCK5, + MAX77802_BUCK6, + MAX77802_BUCK7, + MAX77802_BUCK8, + MAX77802_BUCK9, + MAX77802_BUCK10, + + MAX77802_REG_MAX, +}; + +struct max77802_regulator_data { + int id; + int opmode; + struct regulator_init_data *initdata; + struct device_node *of_node; +}; + +enum max77802_opmode { + MAX77802_OPMODE_OFF, + MAX77802_OPMODE_STANDBY, + MAX77802_OPMODE_LP, + MAX77802_OPMODE_NORMAL, +}; + +struct max77802_opmode_data { + int id; + int mode; +}; + +struct max77802_platform_data { + /* IRQ */ + int irq_gpio; + int ono; + int wakeup; + + /* ---- PMIC ---- */ + struct max77802_regulator_data *regulators; + int num_regulators; + + struct max77802_opmode_data *opmode_data; + + /* + * GPIO-DVS feature is not fully enabled with the current version of + * MAX77802 driver, but the driver does support using a DVS index other + * than the default of 0. + */ + int buck_gpio_dvs[3]; /* GPIO of [0]DVS1, [1]DVS2, [2]DVS3 */ + int buck_default_idx; /* Default value of DVS1, 2, 3 */ + + int buck_gpio_selb[5]; /* 77802: 1, 2, 3, 4, 6 */ +}; + +#endif /* __LINUX_MFD_MAX77802_H */