From patchwork Mon Apr 4 17:11:01 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marcin Niestroj X-Patchwork-Id: 8743331 Return-Path: X-Original-To: patchwork-linux-omap@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 613AB9F39A for ; Mon, 4 Apr 2016 17:17:53 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 3A1F520165 for ; Mon, 4 Apr 2016 17:17:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id F0C2820154 for ; Mon, 4 Apr 2016 17:17:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756287AbcDDRRg (ORCPT ); Mon, 4 Apr 2016 13:17:36 -0400 Received: from 2780.rev.megiteam.pl ([91.227.39.128]:53814 "EHLO vk1046.megiteam.com.pl" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1755977AbcDDRRX (ORCPT ); Mon, 4 Apr 2016 13:17:23 -0400 Received: from gm.localdomain (unknown [95.143.241.142]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (No client certificate requested) (Authenticated sender: marcin.niestroj@grinn-global.com) by vk1046.megiteam.com.pl (Postfix) with ESMTP id 4C1D16227388; Mon, 4 Apr 2016 19:11:30 +0200 (CEST) From: Marcin Niestroj To: Lee Jones Cc: Tony Lindgren , Sebastian Reichel , Dmitry Eremin-Solenikov , David Woodhouse , Rob Herring , Pawel Moll , linux-omap@vger.kernel.org, linux-pm@vger.kernel.org, linux-input@vger.kernel.org, devicetree@vger.kernel.org, Marcin Niestroj Subject: [PATCH 1/5] mfd: tps65217: Add support for IRQs Date: Mon, 4 Apr 2016 19:11:01 +0200 Message-Id: <1459789865-3704-3-git-send-email-m.niestroj@grinn-global.com> X-Mailer: git-send-email 2.8.0 In-Reply-To: <1459789865-3704-1-git-send-email-m.niestroj@grinn-global.com> References: <1459789865-3704-1-git-send-email-m.niestroj@grinn-global.com> X-Virus-Scanned: by amavisd-new Sender: linux-omap-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org X-Spam-Status: No, score=-7.9 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 Add support for handling IRQs: power button, AC and USB power state changes. Mask and interrupt bits are shared within one register, which prevents us to use regmap_irq implementation. New irq_domain is created in order to add interrupt handling for each tps65217's subsystem. IRQ resources have been added for charger subsystem to be able to notify about AC and USB state changes. Signed-off-by: Marcin Niestroj --- drivers/mfd/Kconfig | 1 + drivers/mfd/tps65217.c | 182 ++++++++++++++++++++++++++++++++++++++++++- include/linux/mfd/tps65217.h | 11 +++ 3 files changed, 192 insertions(+), 2 deletions(-) diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index eea61e3..dbf26be 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -1175,6 +1175,7 @@ config MFD_TPS65217 depends on I2C select MFD_CORE select REGMAP_I2C + select IRQ_DOMAIN help If you say yes here you get support for the TPS65217 series of Power Management / White LED chips. diff --git a/drivers/mfd/tps65217.c b/drivers/mfd/tps65217.c index d32b5442..a20980f 100644 --- a/drivers/mfd/tps65217.c +++ b/drivers/mfd/tps65217.c @@ -23,6 +23,9 @@ #include #include #include +#include +#include +#include #include #include #include @@ -30,7 +33,81 @@ #include #include -static const struct mfd_cell tps65217s[] = { +static struct resource charger_resources[] = { + DEFINE_RES_IRQ_NAMED(TPS65217_IRQ_AC, "AC"), + DEFINE_RES_IRQ_NAMED(TPS65217_IRQ_USB, "USB"), +}; + +struct tps65217_irq { + int mask; + int interrupt; +}; + +static const struct tps65217_irq tps65217_irqs[] = { + [TPS65217_IRQ_PB] = { + .mask = TPS65217_INT_PBM, + .interrupt = TPS65217_INT_PBI, + }, + [TPS65217_IRQ_AC] = { + .mask = TPS65217_INT_ACM, + .interrupt = TPS65217_INT_ACI, + }, + [TPS65217_IRQ_USB] = { + .mask = TPS65217_INT_USBM, + .interrupt = TPS65217_INT_USBI, + }, +}; + +static void tps65217_irq_lock(struct irq_data *data) +{ + struct tps65217 *tps = irq_data_get_irq_chip_data(data); + + mutex_lock(&tps->irq_lock); +} + +static void tps65217_irq_sync_unlock(struct irq_data *data) +{ + struct tps65217 *tps = irq_data_get_irq_chip_data(data); + int ret; + + ret = tps65217_reg_write(tps, TPS65217_REG_INT, tps->irq_mask, + TPS65217_PROTECT_NONE); + if (ret != 0) + dev_err(tps->dev, "Failed to sync IRQ masks\n"); + + mutex_unlock(&tps->irq_lock); +} + +static const inline struct tps65217_irq * +irq_to_tps65217_irq(struct tps65217 *tps, struct irq_data *data) +{ + return &tps65217_irqs[data->hwirq]; +} + +static void tps65217_irq_enable(struct irq_data *data) +{ + struct tps65217 *tps = irq_data_get_irq_chip_data(data); + const struct tps65217_irq *irq_data = irq_to_tps65217_irq(tps, data); + + tps->irq_mask &= ~irq_data->mask; +} + +static void tps65217_irq_disable(struct irq_data *data) +{ + struct tps65217 *tps = irq_data_get_irq_chip_data(data); + const struct tps65217_irq *irq_data = irq_to_tps65217_irq(tps, data); + + tps->irq_mask |= irq_data->mask; +} + +static struct irq_chip tps65217_irq_chip = { + .irq_bus_lock = tps65217_irq_lock, + .irq_bus_sync_unlock = tps65217_irq_sync_unlock, + .irq_disable = tps65217_irq_disable, + .irq_enable = tps65217_irq_enable, +}; + +static struct mfd_cell tps65217s[] = { { .name = "tps65217-pmic", .of_compatible = "ti,tps65217-pmic", @@ -41,10 +118,89 @@ static const struct mfd_cell tps65217s[] = { }, { .name = "tps65217-charger", + .num_resources = ARRAY_SIZE(charger_resources), + .resources = charger_resources, .of_compatible = "ti,tps65217-charger", }, }; +static irqreturn_t tps65217_irq_thread(int irq, void *data) +{ + struct tps65217 *tps = data; + unsigned int status; + bool handled = false; + int i; + int ret; + + ret = tps65217_reg_read(tps, TPS65217_REG_INT, &status); + if (ret < 0) { + dev_err(tps->dev, "Failed to read IRQ status: %d\n", + ret); + return IRQ_NONE; + } + + for (i = 0; i < ARRAY_SIZE(tps65217_irqs); i++) { + if (status & tps65217_irqs[i].interrupt) { + handle_nested_irq(irq_find_mapping(tps->irq_domain, i)); + handled = true; + } + } + + if (handled) + return IRQ_HANDLED; + else + return IRQ_NONE; +} + +static int tps65217_irq_map(struct irq_domain *h, unsigned int virq, + irq_hw_number_t hw) +{ + struct tps65217 *tps = h->host_data; + + irq_set_chip_data(virq, tps); + irq_set_chip_and_handler(virq, &tps65217_irq_chip, handle_edge_irq); + irq_set_nested_thread(virq, 1); + irq_set_noprobe(virq); + + return 0; +} + +static const struct irq_domain_ops tps65217_irq_domain_ops = { + .map = tps65217_irq_map, +}; + +static int tps65217_irq_init(struct tps65217 *tps, int irq) +{ + int ret; + + mutex_init(&tps->irq_lock); + + /* Mask all interrupt sources */ + tps->irq_mask = (TPS65217_INT_RESERVEDM | TPS65217_INT_PBM + | TPS65217_INT_ACM | TPS65217_INT_USBM); + tps65217_reg_write(tps, TPS65217_REG_INT, tps->irq_mask, + TPS65217_PROTECT_NONE); + + tps->irq_domain = irq_domain_add_linear(tps->dev->of_node, + TPS65217_NUM_IRQ, &tps65217_irq_domain_ops, tps); + if (!tps->irq_domain) { + dev_err(tps->dev, "Could not create IRQ domain\n"); + return -ENOMEM; + } + + ret = devm_request_threaded_irq(tps->dev, irq, NULL, + tps65217_irq_thread, + IRQF_TRIGGER_RISING | IRQF_ONESHOT, + "tps65217-irq", tps); + if (ret) { + dev_err(tps->dev, "Failed to request IRQ %d: %d\n", + irq, ret); + return ret; + } + + return 0; +} + /** * tps65217_reg_read: Read a single tps65217 register. * @@ -149,11 +305,22 @@ int tps65217_clear_bits(struct tps65217 *tps, unsigned int reg, } EXPORT_SYMBOL_GPL(tps65217_clear_bits); +static bool tps65217_volatile_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case TPS65217_REG_INT: + return true; + default: + return false; + } +} + static const struct regmap_config tps65217_regmap_config = { .reg_bits = 8, .val_bits = 8, .max_register = TPS65217_REG_MAX, + .volatile_reg = tps65217_volatile_reg, }; static const struct of_device_id tps65217_of_match[] = { @@ -205,8 +372,19 @@ static int tps65217_probe(struct i2c_client *client, return ret; } + if (client->irq) { + tps65217_irq_init(tps, client->irq); + } else { + int i; + + /* Don't tell children about IRQ resources which won't fire */ + for (i = 0; i < ARRAY_SIZE(tps65217s); i++) + tps65217s[i].num_resources = 0; + } + ret = mfd_add_devices(tps->dev, -1, tps65217s, - ARRAY_SIZE(tps65217s), NULL, 0, NULL); + ARRAY_SIZE(tps65217s), NULL, 0, + tps->irq_domain); if (ret < 0) { dev_err(tps->dev, "mfd_add_devices failed: %d\n", ret); return ret; diff --git a/include/linux/mfd/tps65217.h b/include/linux/mfd/tps65217.h index ac7fba4..f80a5d3 100644 --- a/include/linux/mfd/tps65217.h +++ b/include/linux/mfd/tps65217.h @@ -73,6 +73,7 @@ #define TPS65217_PPATH_AC_CURRENT_MASK 0x0C #define TPS65217_PPATH_USB_CURRENT_MASK 0x03 +#define TPS65217_INT_RESERVEDM BIT(7) #define TPS65217_INT_PBM BIT(6) #define TPS65217_INT_ACM BIT(5) #define TPS65217_INT_USBM BIT(4) @@ -233,6 +234,13 @@ struct tps65217_bl_pdata { int dft_brightness; }; +enum tps65217_irqs { + TPS65217_IRQ_PB, + TPS65217_IRQ_AC, + TPS65217_IRQ_USB, + TPS65217_NUM_IRQ +}; + /** * struct tps65217_board - packages regulator init data * @tps65217_regulator_data: regulator initialization values @@ -257,6 +265,9 @@ struct tps65217 { unsigned long id; struct regulator_desc desc[TPS65217_NUM_REGULATOR]; struct regmap *regmap; + struct irq_domain *irq_domain; + struct mutex irq_lock; + u8 irq_mask; }; static inline struct tps65217 *dev_to_tps65217(struct device *dev)