From patchwork Thu Jan 20 13:43:23 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Binding X-Patchwork-Id: 533787 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 75A2CC433EF for ; Thu, 20 Jan 2022 13:44:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243594AbiATNoP (ORCPT ); Thu, 20 Jan 2022 08:44:15 -0500 Received: from mx0a-001ae601.pphosted.com ([67.231.149.25]:29056 "EHLO mx0b-001ae601.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S241423AbiATNoF (ORCPT ); Thu, 20 Jan 2022 08:44:05 -0500 Received: from pps.filterd (m0077473.ppops.net [127.0.0.1]) by mx0a-001ae601.pphosted.com (8.16.1.2/8.16.1.2) with ESMTP id 20K6iPZF000624; Thu, 20 Jan 2022 07:43:45 -0600 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cirrus.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding : content-type; s=PODMain02222019; bh=2uKaUsmBK/JS5c3fzdfTaeitNhcGMoHueBDg02mENRE=; b=HcL+nf4k4bMel0k1JhAeZOiDGZi/8VRYr3+5DjFAkHCwJKUs67cqPNBJFO+4kkx4Glfg IVc31d1lPtUBAsnCA+d7Rt77l7F8ay2T3Ysp+aVf4RpvlYUv29ied7p86F+rTziYludi 45XzV1dFNQfWe5tWjNlnSnMNDCrwhOlhwuFMS2VICkhXLIGHAz0uYepSuvuP2fJHWjoC Z3bE3iKhUj01Xf1eINDqbE6HtjIfwNUdGOpAgSy49GGyRBXq8TmSfKDUFNnhnar+98gM N3rORXQEynwhQpJR8YUzgaGBg3uSI/8XT7eos6VMhG8O9o98iuR1z3QIgpkNOv7cunMl +A== Received: from ediex01.ad.cirrus.com ([84.19.233.68]) by mx0a-001ae601.pphosted.com (PPS) with ESMTPS id 3dpms0h5y2-4 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT); Thu, 20 Jan 2022 07:43:45 -0600 Received: from EDIEX01.ad.cirrus.com (198.61.84.80) by EDIEX01.ad.cirrus.com (198.61.84.80) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.18; Thu, 20 Jan 2022 13:43:42 +0000 Received: from ediswmail.ad.cirrus.com (198.61.86.93) by EDIEX01.ad.cirrus.com (198.61.84.80) with Microsoft SMTP Server id 15.1.2375.18 via Frontend Transport; Thu, 20 Jan 2022 13:43:42 +0000 Received: from LONN2DGDQ73.ad.cirrus.com (unknown [198.90.238.138]) by ediswmail.ad.cirrus.com (Postfix) with ESMTP id E87AAB13; Thu, 20 Jan 2022 13:43:41 +0000 (UTC) From: Stefan Binding To: Mark Brown , "Rafael J . Wysocki" , Len Brown , Hans de Goede , Mark Gross , Jaroslav Kysela , Takashi Iwai CC: , , , , , , Lucas Tanure , Stefan Binding Subject: [PATCH v4 6/9] platform/x86: bus-multi-instantiate: Reorganize I2C functions Date: Thu, 20 Jan 2022 13:43:23 +0000 Message-ID: <20220120134326.5295-7-sbinding@opensource.cirrus.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220120134326.5295-1-sbinding@opensource.cirrus.com> References: <20220120134326.5295-1-sbinding@opensource.cirrus.com> MIME-Version: 1.0 X-Proofpoint-ORIG-GUID: sHmM3X3rXK1t09A_yfDPMDODFlg9TwrM X-Proofpoint-GUID: sHmM3X3rXK1t09A_yfDPMDODFlg9TwrM X-Proofpoint-Spam-Reason: safe Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org From: Lucas Tanure Reorganize I2C functions to accommodate SPI support Split the probe and factor out parts of the code that will be used in the SPI support Signed-off-by: Lucas Tanure Signed-off-by: Stefan Binding Reviewed-by: Hans de Goede --- drivers/platform/x86/bus-multi-instantiate.c | 150 ++++++++++++------- 1 file changed, 96 insertions(+), 54 deletions(-) diff --git a/drivers/platform/x86/bus-multi-instantiate.c b/drivers/platform/x86/bus-multi-instantiate.c index 982dfecfd27c..50f1540762e9 100644 --- a/drivers/platform/x86/bus-multi-instantiate.c +++ b/drivers/platform/x86/bus-multi-instantiate.c @@ -29,85 +29,129 @@ struct bmi_instance { struct bmi { int i2c_num; - struct i2c_client *i2c_devs[]; + struct i2c_client **i2c_devs; }; -static int bmi_probe(struct platform_device *pdev) +static int bmi_get_irq(struct platform_device *pdev, struct acpi_device *adev, + const struct bmi_instance *inst) +{ + int ret; + + switch (inst->flags & IRQ_RESOURCE_TYPE) { + case IRQ_RESOURCE_GPIO: + ret = acpi_dev_gpio_irq_get(adev, inst->irq_idx); + break; + case IRQ_RESOURCE_APIC: + ret = platform_get_irq(pdev, inst->irq_idx); + break; + default: + ret = 0; + break; + } + + if (ret < 0) + dev_err_probe(&pdev->dev, ret, "Error requesting irq at index %d: %d\n", + inst->irq_idx, ret); + + return ret; +} + +static void bmi_devs_unregister(struct bmi *bmi) +{ + while (bmi->i2c_num > 0) + i2c_unregister_device(bmi->i2c_devs[--bmi->i2c_num]); +} + +/** + * bmi_i2c_probe - Instantiate multiple I2C devices from inst array + * @pdev: Platform device + * @adev: ACPI device + * @bmi: Internal struct for Bus multi instantiate driver + * @inst: Array of instances to probe + * + * Returns the number of I2C devices instantiate, Zero if none is found or a negative error code. + */ +static int bmi_i2c_probe(struct platform_device *pdev, struct acpi_device *adev, struct bmi *bmi, + const struct bmi_instance *inst_array) { struct i2c_board_info board_info = {}; - const struct bmi_instance *inst; struct device *dev = &pdev->dev; - struct acpi_device *adev; - struct bmi *bmi; char name[32]; - int i, ret; + int i, ret = 0, count; - inst = device_get_match_data(dev); - if (!inst) { - dev_err(dev, "Error ACPI match data is missing\n"); - return -ENODEV; - } - - adev = ACPI_COMPANION(dev); - - /* Count number of clients to instantiate */ ret = i2c_acpi_client_count(adev); - if (ret < 0) + if (ret <= 0) return ret; + count = ret; - bmi = devm_kmalloc(dev, struct_size(bmi, i2c_devs, ret), GFP_KERNEL); - if (!bmi) + bmi->i2c_devs = devm_kcalloc(dev, count, sizeof(*bmi->i2c_devs), GFP_KERNEL); + if (!bmi->i2c_devs) return -ENOMEM; - bmi->i2c_num = ret; - - for (i = 0; i < bmi->i2c_num && inst[i].type; i++) { + for (i = 0; i < count && inst_array[i].type; i++) { memset(&board_info, 0, sizeof(board_info)); - strlcpy(board_info.type, inst[i].type, I2C_NAME_SIZE); - snprintf(name, sizeof(name), "%s-%s.%d", dev_name(dev), inst[i].type, i); + strscpy(board_info.type, inst_array[i].type, I2C_NAME_SIZE); + snprintf(name, sizeof(name), "%s-%s.%d", dev_name(dev), inst_array[i].type, i); board_info.dev_name = name; - switch (inst[i].flags & IRQ_RESOURCE_TYPE) { - case IRQ_RESOURCE_GPIO: - ret = acpi_dev_gpio_irq_get(adev, inst[i].irq_idx); - if (ret < 0) { - dev_err(dev, "Error requesting irq at index %d: %d\n", - inst[i].irq_idx, ret); - goto error; - } - board_info.irq = ret; - break; - case IRQ_RESOURCE_APIC: - ret = platform_get_irq(pdev, inst[i].irq_idx); - if (ret < 0) { - dev_dbg(dev, "Error requesting irq at index %d: %d\n", - inst[i].irq_idx, ret); - goto error; - } - board_info.irq = ret; - break; - default: - board_info.irq = 0; - break; - } + + ret = bmi_get_irq(pdev, adev, &inst_array[i]); + if (ret < 0) + goto error; + board_info.irq = ret; + bmi->i2c_devs[i] = i2c_acpi_new_device(dev, i, &board_info); if (IS_ERR(bmi->i2c_devs[i])) { ret = dev_err_probe(dev, PTR_ERR(bmi->i2c_devs[i]), "Error creating i2c-client, idx %d\n", i); goto error; } + bmi->i2c_num++; } - if (i < bmi->i2c_num) { + if (bmi->i2c_num < count) { dev_err(dev, "Error finding driver, idx %d\n", i); ret = -ENODEV; goto error; } - platform_set_drvdata(pdev, bmi); - return 0; + dev_info(dev, "Instantiate %d I2C devices.\n", bmi->i2c_num); + return bmi->i2c_num; error: - while (--i >= 0) - i2c_unregister_device(bmi->i2c_devs[i]); + dev_err_probe(dev, ret, "I2C error %d\n", ret); + bmi_devs_unregister(bmi); + + return ret; +} + +static int bmi_probe(struct platform_device *pdev) +{ + const struct bmi_instance *inst_array; + struct device *dev = &pdev->dev; + struct acpi_device *adev; + struct bmi *bmi; + int ret; + + inst_array = device_get_match_data(dev); + if (!inst_array) { + dev_err(dev, "Error ACPI match data is missing\n"); + return -ENODEV; + } + + adev = ACPI_COMPANION(dev); + if (!adev) + return -ENODEV; + + bmi = devm_kzalloc(dev, sizeof(*bmi), GFP_KERNEL); + if (!bmi) + return -ENOMEM; + + platform_set_drvdata(pdev, bmi); + + ret = bmi_i2c_probe(pdev, adev, bmi, inst_array); + if (ret > 0) + return 0; + if (ret == 0) + ret = -ENODEV; return ret; } @@ -115,10 +159,8 @@ static int bmi_probe(struct platform_device *pdev) static int bmi_remove(struct platform_device *pdev) { struct bmi *bmi = platform_get_drvdata(pdev); - int i; - for (i = 0; i < bmi->i2c_num; i++) - i2c_unregister_device(bmi->i2c_devs[i]); + bmi_devs_unregister(bmi); return 0; }