From patchwork Tue Oct 5 14:43:27 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Baryshkov X-Patchwork-Id: 12536935 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 14A35C4167D for ; Tue, 5 Oct 2021 14:43:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 011CF61381 for ; Tue, 5 Oct 2021 14:43:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234355AbhJEOpe (ORCPT ); Tue, 5 Oct 2021 10:45:34 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48764 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234084AbhJEOpa (ORCPT ); Tue, 5 Oct 2021 10:45:30 -0400 Received: from mail-lf1-x129.google.com (mail-lf1-x129.google.com [IPv6:2a00:1450:4864:20::129]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AB5BAC061749 for ; Tue, 5 Oct 2021 07:43:39 -0700 (PDT) Received: by mail-lf1-x129.google.com with SMTP id u18so87524630lfd.12 for ; Tue, 05 Oct 2021 07:43:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=a82goinfuhMQndAZ1eqxYJiqwbzakFYRTc0Nku7E5EU=; b=MklQJzuwa/ZFOESgExk5UzUFSeujsCBMbaU2oxLIrUkRoRcBHXqF/YsgKqqnPoeXXU nZnHXh77vfie4ubCWLt+6PqH9nrneHwQNLqsBvXHsVbGxqchVUtrWUObTnNaFDfAdKOS X6n2f41am/V0bYmvfPYsSPimv4eIiz+VR3QCI+ONt7QmNnAg3oeLtzuIAyJ51ccqChma WnHnxnAJ8rFQSPDDW7Roj4X97iDM1Yq71xqwAOqUHLdM5XyNLQClvW93R8BxsFFmh5ya nyaCtHr4n9Qtp35Z8w2P78MYFbj3ZBC9j9jzhS1H1mxEzEWkC7/Um0qX+Uez/EHU2ha3 Nq8g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=a82goinfuhMQndAZ1eqxYJiqwbzakFYRTc0Nku7E5EU=; b=vKqeMgKXiHAbvkOakdT3/tJAiOuHTnC+UOyY/+1S0/3/e14BUgGSOsPxpNQMZnARNK 5/aZnSfH8gEuKl0ZfdurRdCQIZ35hYMv2fF/XfyvDkGX8vBkq4i5P37+IAlOL8QzqPcV UFgh43S2Y+bHjOI0BI356P9DHU5+3ST8OdbtegxyIKq2RoJA6lQ92BDNJVll4wTIn+YG wiu8jMDv4PwLwnMUo/M3BQSm5abIxIbeWzfJgjjjK64tOCO1mW6/aviCGcwB66A9hzpM +sRTDNX3W+Y983H/gwyqtt99cvkLIGYHVbQwijdyaGnUlM4rGSSzi/EMCFgvGrkWCsBI e4Fw== X-Gm-Message-State: AOAM533/O1PryfQnK3eU9iRNkiUhkQy+Rh+ekcNpk7t2RBJ1AKOjPRY4 tmE+FmrzDQ5RSyFgqHPg1AGxiw== X-Google-Smtp-Source: ABdhPJy3Z27g7RcR2B1ELaPD2bnZM2sNRMzcJzL8/rzi9ZbByZ/v7NDqgVX/vKRn3rw6o9oBLliCog== X-Received: by 2002:a2e:99c2:: with SMTP id l2mr18150837ljj.152.1633445017958; Tue, 05 Oct 2021 07:43:37 -0700 (PDT) Received: from umbar.lan ([37.153.55.125]) by smtp.gmail.com with ESMTPSA id t22sm1987173ljc.120.2021.10.05.07.43.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 05 Oct 2021 07:43:37 -0700 (PDT) From: Dmitry Baryshkov To: Andy Gross , Bjorn Andersson , Linus Walleij , Rob Herring Cc: linux-gpio@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-msm@vger.kernel.org Subject: [PATCH v2 4/6] pinctrl: qcom: ssbi-mpp: add support for hierarchical IRQ chip Date: Tue, 5 Oct 2021 17:43:27 +0300 Message-Id: <20211005144329.2405315-5-dmitry.baryshkov@linaro.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20211005144329.2405315-1-dmitry.baryshkov@linaro.org> References: <20211005144329.2405315-1-dmitry.baryshkov@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org ssbi-mpp did not have any irqchip support so consumers of this in device tree would need to call gpio[d]_to_irq() in order to get the proper IRQ on the underlying PMIC. IRQ chips in device tree should be usable from the start without the consumer having to make an additional call to get the proper IRQ on the parent. This patch adds hierarchical IRQ chip support to the ssbi-mpp code to correct this issue. Signed-off-by: Dmitry Baryshkov --- drivers/pinctrl/qcom/pinctrl-ssbi-mpp.c | 111 ++++++++++++++++++++---- 1 file changed, 93 insertions(+), 18 deletions(-) diff --git a/drivers/pinctrl/qcom/pinctrl-ssbi-mpp.c b/drivers/pinctrl/qcom/pinctrl-ssbi-mpp.c index a90cada1d657..842940594c4a 100644 --- a/drivers/pinctrl/qcom/pinctrl-ssbi-mpp.c +++ b/drivers/pinctrl/qcom/pinctrl-ssbi-mpp.c @@ -87,7 +87,6 @@ /** * struct pm8xxx_pin_data - dynamic configuration for a pin * @reg: address of the control register - * @irq: IRQ from the PMIC interrupt controller * @mode: operating mode for the pin (digital, analog or current sink) * @input: pin is input * @output: pin is output @@ -103,7 +102,6 @@ */ struct pm8xxx_pin_data { unsigned reg; - int irq; u8 mode; @@ -126,6 +124,7 @@ struct pm8xxx_mpp { struct regmap *regmap; struct pinctrl_dev *pctrl; struct gpio_chip chip; + struct irq_chip irq; struct pinctrl_desc desc; unsigned npins; @@ -148,6 +147,8 @@ static const struct pin_config_item pm8xxx_conf_items[] = { #endif #define PM8XXX_MAX_MPPS 12 +#define PM8XXX_MPP_PHYSICAL_OFFSET 1 + static const char * const pm8xxx_groups[PM8XXX_MAX_MPPS] = { "mpp1", "mpp2", "mpp3", "mpp4", "mpp5", "mpp6", "mpp7", "mpp8", "mpp9", "mpp10", "mpp11", "mpp12", @@ -492,12 +493,16 @@ static int pm8xxx_mpp_get(struct gpio_chip *chip, unsigned offset) struct pm8xxx_mpp *pctrl = gpiochip_get_data(chip); struct pm8xxx_pin_data *pin = pctrl->desc.pins[offset].drv_data; bool state; - int ret; + int ret, irq; if (!pin->input) return !!pin->output_value; - ret = irq_get_irqchip_state(pin->irq, IRQCHIP_STATE_LINE_LEVEL, &state); + irq = chip->to_irq(chip, offset); + if (irq < 0) + return irq; + + ret = irq_get_irqchip_state(irq, IRQCHIP_STATE_LINE_LEVEL, &state); if (!ret) ret = !!state; @@ -524,18 +529,10 @@ static int pm8xxx_mpp_of_xlate(struct gpio_chip *chip, if (flags) *flags = gpio_desc->args[1]; - return gpio_desc->args[0] - 1; + return gpio_desc->args[0] - PM8XXX_MPP_PHYSICAL_OFFSET; } -static int pm8xxx_mpp_to_irq(struct gpio_chip *chip, unsigned offset) -{ - struct pm8xxx_mpp *pctrl = gpiochip_get_data(chip); - struct pm8xxx_pin_data *pin = pctrl->desc.pins[offset].drv_data; - - return pin->irq; -} - #ifdef CONFIG_DEBUG_FS #include @@ -558,7 +555,7 @@ static void pm8xxx_mpp_dbg_show_one(struct seq_file *s, "abus3", }; - seq_printf(s, " mpp%-2d:", offset + 1); + seq_printf(s, " mpp%-2d:", offset + PM8XXX_MPP_PHYSICAL_OFFSET); switch (pin->mode) { case PM8XXX_MPP_DIGITAL: @@ -640,7 +637,6 @@ static const struct gpio_chip pm8xxx_mpp_template = { .get = pm8xxx_mpp_get, .set = pm8xxx_mpp_set, .of_xlate = pm8xxx_mpp_of_xlate, - .to_irq = pm8xxx_mpp_to_irq, .dbg_show = pm8xxx_mpp_dbg_show, .owner = THIS_MODULE, }; @@ -732,6 +728,55 @@ static int pm8xxx_pin_populate(struct pm8xxx_mpp *pctrl, return 0; } +static int pm8xxx_mpp_domain_translate(struct irq_domain *domain, + struct irq_fwspec *fwspec, + unsigned long *hwirq, + unsigned int *type) +{ + struct pm8xxx_mpp *pctrl = container_of(domain->host_data, + struct pm8xxx_mpp, chip); + + if (fwspec->param_count != 2 || + fwspec->param[0] < PM8XXX_MPP_PHYSICAL_OFFSET || + fwspec->param[0] > pctrl->chip.ngpio) + return -EINVAL; + + *hwirq = fwspec->param[0] - PM8XXX_MPP_PHYSICAL_OFFSET; + *type = fwspec->param[1]; + + return 0; +} + +static unsigned int pm8xxx_mpp_child_offset_to_irq(struct gpio_chip *chip, + unsigned int offset) +{ + return offset + PM8XXX_MPP_PHYSICAL_OFFSET; +} + +static int pm8821_mpp_child_to_parent_hwirq(struct gpio_chip *chip, + unsigned int child_hwirq, + unsigned int child_type, + unsigned int *parent_hwirq, + unsigned int *parent_type) +{ + *parent_hwirq = child_hwirq + 24; + *parent_type = child_type; + + return 0; +} + +static int pm8xxx_mpp_child_to_parent_hwirq(struct gpio_chip *chip, + unsigned int child_hwirq, + unsigned int child_type, + unsigned int *parent_hwirq, + unsigned int *parent_type) +{ + *parent_hwirq = child_hwirq + 0x80; + *parent_type = child_type; + + return 0; +} + static const struct of_device_id pm8xxx_mpp_of_match[] = { { .compatible = "qcom,pm8018-mpp", .data = (void *) 6 }, { .compatible = "qcom,pm8038-mpp", .data = (void *) 6 }, @@ -746,7 +791,10 @@ MODULE_DEVICE_TABLE(of, pm8xxx_mpp_of_match); static int pm8xxx_mpp_probe(struct platform_device *pdev) { struct pm8xxx_pin_data *pin_data; + struct irq_domain *parent_domain; + struct device_node *parent_node; struct pinctrl_pin_desc *pins; + struct gpio_irq_chip *girq; struct pm8xxx_mpp *pctrl; int ret; int i; @@ -783,9 +831,6 @@ static int pm8xxx_mpp_probe(struct platform_device *pdev) for (i = 0; i < pctrl->desc.npins; i++) { pin_data[i].reg = SSBI_REG_ADDR_MPP(i); - pin_data[i].irq = platform_get_irq(pdev, i); - if (pin_data[i].irq < 0) - return pin_data[i].irq; ret = pm8xxx_pin_populate(pctrl, &pin_data[i]); if (ret) @@ -816,6 +861,36 @@ static int pm8xxx_mpp_probe(struct platform_device *pdev) pctrl->chip.of_gpio_n_cells = 2; pctrl->chip.label = dev_name(pctrl->dev); pctrl->chip.ngpio = pctrl->npins; + + parent_node = of_irq_find_parent(pctrl->dev->of_node); + if (!parent_node) + return -ENXIO; + + parent_domain = irq_find_host(parent_node); + of_node_put(parent_node); + if (!parent_domain) + return -ENXIO; + + pctrl->irq.name = "ssbi-mpp"; + pctrl->irq.irq_mask_ack = irq_chip_mask_ack_parent; + pctrl->irq.irq_unmask = irq_chip_unmask_parent; + pctrl->irq.irq_set_type = irq_chip_set_type_parent; + pctrl->irq.flags = IRQCHIP_MASK_ON_SUSPEND | IRQCHIP_SKIP_SET_WAKE; + + girq = &pctrl->chip.irq; + girq->chip = &pctrl->irq; + girq->default_type = IRQ_TYPE_NONE; + girq->handler = handle_level_irq; + girq->fwnode = of_node_to_fwnode(pctrl->dev->of_node); + girq->parent_domain = parent_domain; + if (of_device_is_compatible(pdev->dev.of_node, "qcom,pm8821-mpp")) + girq->child_to_parent_hwirq = pm8821_mpp_child_to_parent_hwirq; + else + girq->child_to_parent_hwirq = pm8xxx_mpp_child_to_parent_hwirq; + girq->populate_parent_alloc_arg = gpiochip_populate_parent_fwspec_twocell; + girq->child_offset_to_irq = pm8xxx_mpp_child_offset_to_irq; + girq->child_irq_domain_ops.translate = pm8xxx_mpp_domain_translate; + ret = gpiochip_add_data(&pctrl->chip, pctrl); if (ret) { dev_err(&pdev->dev, "failed register gpiochip\n");