From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS, UNWANTED_LANGUAGE_BODY,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id DA718C32789 for ; Tue, 20 Nov 2018 16:00:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B4C14206BA for ; Tue, 20 Nov 2018 16:00:24 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B4C14206BA Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729861AbeKUC3Y (ORCPT ); Tue, 20 Nov 2018 21:29:24 -0500 Received: from mga14.intel.com ([192.55.52.115]:50164 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728829AbeKUC3W (ORCPT ); Tue, 20 Nov 2018 21:29:22 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by fmsmga103.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 20 Nov 2018 07:59:32 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.56,257,1539673200"; d="scan'208";a="97742355" Received: from black.fi.intel.com ([10.237.72.28]) by FMSMGA003.fm.intel.com with ESMTP; 20 Nov 2018 07:59:30 -0800 Received: by black.fi.intel.com (Postfix, from userid 1003) id BD312A82; Tue, 20 Nov 2018 17:59:25 +0200 (EET) From: Andy Shevchenko To: Darren Hart , platform-driver-x86@vger.kernel.org, "Rafael J. Wysocki" , linux-acpi@vger.kernel.org, Jonathan Cameron , Wolfram Sang , Mika Westerberg , linux-i2c@vger.kernel.org, Hans de Goede , Heikki Krogerus , linux-kernel@vger.kernel.org Cc: Andy Shevchenko Subject: [PATCH v1 09/15] platform/x86: i2c-multi-instantiate: Count I2cSerialBus() resources Date: Tue, 20 Nov 2018 17:59:18 +0200 Message-Id: <20181120155924.10773-10-andriy.shevchenko@linux.intel.com> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20181120155924.10773-1-andriy.shevchenko@linux.intel.com> References: <20181120155924.10773-1-andriy.shevchenko@linux.intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Instead of relying on hard coded and thus expected number of I2C clients, count the real amount provided by firmware. This allows to support non-fixed amount of the slaves. Signed-off-by: Andy Shevchenko --- drivers/platform/x86/i2c-multi-instantiate.c | 34 ++++++++++++++++++-- 1 file changed, 31 insertions(+), 3 deletions(-) diff --git a/drivers/platform/x86/i2c-multi-instantiate.c b/drivers/platform/x86/i2c-multi-instantiate.c index 16a0eabe1e31..d17686e10d08 100644 --- a/drivers/platform/x86/i2c-multi-instantiate.c +++ b/drivers/platform/x86/i2c-multi-instantiate.c @@ -12,6 +12,7 @@ #include #include #include +#include struct i2c_inst_data { const char *type; @@ -23,6 +24,31 @@ struct i2c_multi_inst_data { struct i2c_client *clients[0]; }; +static int i2c_multi_inst_count(struct acpi_resource *ares, void *data) +{ + struct acpi_resource_i2c_serialbus *sb; + int *count = data; + + if (i2c_acpi_get_i2c_resource(ares, &sb)) + *count = *count + 1; + + return 1; +} + +static int i2c_multi_inst_count_resources(struct acpi_device *adev) +{ + LIST_HEAD(r); + int count = 0; + int ret; + + ret = acpi_dev_get_resources(adev, &r, i2c_multi_inst_count, &count); + if (ret < 0) + return ret; + + acpi_dev_free_resource_list(&r); + return count; +} + static int i2c_multi_inst_probe(struct platform_device *pdev) { struct i2c_multi_inst_data *multi; @@ -44,15 +70,17 @@ static int i2c_multi_inst_probe(struct platform_device *pdev) adev = ACPI_COMPANION(dev); /* Count number of clients to instantiate */ - for (i = 0; inst_data[i].type; i++) {} + ret = i2c_multi_inst_count_resources(adev); + if (ret < 0) + return ret; multi = devm_kmalloc(dev, - offsetof(struct i2c_multi_inst_data, clients[i]), + offsetof(struct i2c_multi_inst_data, clients[ret]), GFP_KERNEL); if (!multi) return -ENOMEM; - multi->num_clients = i; + multi->num_clients = ret; for (i = 0; i < multi->num_clients; i++) { memset(&board_info, 0, sizeof(board_info)); -- 2.19.1