Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751745AbcL1QmP (ORCPT ); Wed, 28 Dec 2016 11:42:15 -0500 Received: from us01smtprelay-2.synopsys.com ([198.182.47.9]:50572 "EHLO smtprelay.synopsys.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751317AbcL1QmN (ORCPT ); Wed, 28 Dec 2016 11:42:13 -0500 Subject: Re: [PATCH v5 6/7] i2c: designware: enable SLAVE in platform module To: Andy Shevchenko , Luis Oliveira , , , , , , , , References: <1482939844.9552.165.camel@linux.intel.com> <20e47113-efd7-787c-b2f8-39e9fd8b83d2@synopsys.com> <1482942696.9552.172.camel@linux.intel.com> CC: , , From: Luis Oliveira Message-ID: Date: Wed, 28 Dec 2016 16:41:55 +0000 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:45.0) Gecko/20100101 Thunderbird/45.5.1 MIME-Version: 1.0 In-Reply-To: <1482942696.9552.172.camel@linux.intel.com> Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-Originating-IP: [10.107.25.45] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1564 Lines: 62 On 28-Dec-16 16:31, Andy Shevchenko wrote: > On Wed, 2016-12-28 at 15:53 +0000, Luis Oliveira wrote: >> On 28-Dec-16 15:44, Andy Shevchenko wrote: >>> On Wed, 2016-12-28 at 14:43 +0000, Luis Oliveira wrote: >>>> - Slave mode selected in platform module (devicetree support only) >>>> - Check for ACPI - not supported in SLAVE mode: >>>> - Changed the ifndef style to the use of ACPI_HANDLE that >>>> returns >>>> NULL >>>> if the device was not enumerated from ACPI namespace. >>> >>> I'm not sure what is wrong with ACPI? >> >> I dont have a way to test it. Just that. > > Okay, can you provide an excerpt to see how it will look like in DTS? Yes, it looks like this now: i2c@0x2000 { compatible = "snps,designware-i2c"; #address-cells = <1>; #size-cells = <0>; reg = <0x2000 0x100>; clock-frequency = <400000>; clocks = <&i2cclk>; interrupts = <0>; eeprom@64 { compatible = "linux,slave-24c02"; reg = <0x40000064>; }; }; > > >>>> - dev->functionality = I2C_FUNC_10BIT_ADDR | >>>> DW_IC_DEFAULT_FUNCTIONALITY; >>>> - >>>> - i2c_dw_configure_master(pdev); >>>> + if (ACPI_HANDLE(&pdev->dev) == NULL) { >>> >>> I don't think you need this at all. >> >> This is to avoid the use of the "ifdef" style I used before. > > My point is to drop it completely. > >>> >>>> + device_for_each_child_node(&pdev->dev, child) { >>> >>> This is resource agnostic. >>> >>>> + fwnode_property_read_u32(child, "reg", >>>> ®); >>> >>> This is as well. >> >> Are you suggesting I use of_ functions? > > Nope. See above. > >