From patchwork Fri Sep 9 08:42:02 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marcin Niestroj X-Patchwork-Id: 9322691 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id E587E60231 for ; Fri, 9 Sep 2016 08:42:35 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D31EA29CFB for ; Fri, 9 Sep 2016 08:42:35 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id C7DF529D00; Fri, 9 Sep 2016 08:42:35 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D9A1129CFB for ; Fri, 9 Sep 2016 08:42:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753184AbcIIImd (ORCPT ); Fri, 9 Sep 2016 04:42:33 -0400 Received: from smtp2.megiteam.pl ([213.189.52.193]:36638 "EHLO smtp2.megiteam.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752605AbcIIIma (ORCPT ); Fri, 9 Sep 2016 04:42:30 -0400 Received: from [95.143.241.142] (helo=localhost.localdomain) by smtp.megiteam.pl with esmtpsa (TLS1.2:DHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1biHO7-0004s8-1h; Fri, 09 Sep 2016 10:42:19 +0200 From: Marcin Niestroj To: Lee Jones Cc: Dmitry Torokhov , Tony Lindgren , Sebastian Reichel , Rob Herring , Pawel Moll , Grygorii Strashko , linux-omap@vger.kernel.org, linux-pm@vger.kernel.org, linux-input@vger.kernel.org, devicetree@vger.kernel.org, Marcin Niestroj Subject: [PATCH v6 1/3] mfd: tps65217: Add support for IRQs Date: Fri, 9 Sep 2016 10:42:02 +0200 Message-Id: <20160909084204.26226-2-m.niestroj@grinn-global.com> X-Mailer: git-send-email 2.9.3 In-Reply-To: <20160909084204.26226-1-m.niestroj@grinn-global.com> References: <20160909084204.26226-1-m.niestroj@grinn-global.com> Sender: linux-input-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.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 Acked-by: Lee Jones Reviewed-by: Grygorii Strashko Tested-by: Tony Lindgren --- Changes v4 -> v6: none Changes v3 -> v4 (suggested by Grygorii): * Add irq_set_parent() during irq init * Remove hardcoded IRQ trigger type, rely on DT bindings instead Changes v2 -> v3 (suggested by Lee): * Alphabetical reorder of includes * Rename enum tps65217_irqs -> tps65217_irq_type, so we won't confuse it with structure object with the same name. * Fix inconsistent order of irq_enable and irq_disable * Remove redundant 'else' when returning from tps65217_irq_thread Changes v1 -> v2: none drivers/mfd/Kconfig | 1 + drivers/mfd/tps65217.c | 195 +++++++++++++++++++++++++++++++++++++++++-- include/linux/mfd/tps65217.h | 12 +++ 3 files changed, 200 insertions(+), 8 deletions(-) diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index 2d1fb64..35e9c9a 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -1214,6 +1214,7 @@ 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 049a6fc..41b5d59 100644 --- a/drivers/mfd/tps65217.c +++ b/drivers/mfd/tps65217.c @@ -15,22 +15,99 @@ * GNU General Public License for more details. */ -#include #include -#include -#include +#include #include +#include #include -#include -#include -#include +#include +#include +#include +#include #include #include +#include +#include +#include #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_enable = tps65217_irq_enable, + .irq_disable = tps65217_irq_disable, +}; + +static struct mfd_cell tps65217s[] = { { .name = "tps65217-pmic", .of_compatible = "ti,tps65217-pmic", @@ -41,10 +118,90 @@ 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; + + 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_parent(virq, tps->irq); + 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); + tps->irq = irq; + + /* 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_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 +306,22 @@ 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 +373,19 @@ 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 = devm_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 1c88231..4ccda89 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_irq_type { + 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 @@ -258,6 +266,10 @@ struct tps65217 { struct regulator_desc desc[TPS65217_NUM_REGULATOR]; struct regmap *regmap; u8 *strobes; + struct irq_domain *irq_domain; + struct mutex irq_lock; + u8 irq_mask; + int irq; }; static inline struct tps65217 *dev_to_tps65217(struct device *dev)