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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7284CC6FA99 for ; Fri, 10 Mar 2023 11:54:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229976AbjCJLyQ (ORCPT ); Fri, 10 Mar 2023 06:54:16 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34618 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229469AbjCJLyD (ORCPT ); Fri, 10 Mar 2023 06:54:03 -0500 Received: from fllv0015.ext.ti.com (fllv0015.ext.ti.com [198.47.19.141]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7450AC2237; Fri, 10 Mar 2023 03:54:00 -0800 (PST) Received: from fllv0035.itg.ti.com ([10.64.41.0]) by fllv0015.ext.ti.com (8.15.2/8.15.2) with ESMTP id 32ABro76127449; Fri, 10 Mar 2023 05:53:50 -0600 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1678449230; bh=QSIrK2hf0RVPY4b/FgB+Q97RERaUbLYuYjYCaB2CdYQ=; h=Date:Subject:From:To:CC:References:In-Reply-To; b=USybG5S2djIhE2wGOt/XlHuHsO3yvv7Mxug4un46WUoMCM+2BK8kU+nJm28KePPeR 0QYi884r64b+bJo6keFHmWj6YHAcQvcr7aCB9tzjNQnyKZNp3aq6a+l8nxiQebyHr6 H3XE4NII6n3IBMG9S7N3C3sFtD5GnOB57F4Se5Eo= Received: from DLEE111.ent.ti.com (dlee111.ent.ti.com [157.170.170.22]) by fllv0035.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 32ABronN096866 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Fri, 10 Mar 2023 05:53:50 -0600 Received: from DLEE113.ent.ti.com (157.170.170.24) by DLEE111.ent.ti.com (157.170.170.22) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.16; Fri, 10 Mar 2023 05:53:50 -0600 Received: from lelv0327.itg.ti.com (10.180.67.183) by DLEE113.ent.ti.com (157.170.170.24) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.16 via Frontend Transport; Fri, 10 Mar 2023 05:53:50 -0600 Received: from [10.24.69.114] (ileaxei01-snat.itg.ti.com [10.180.69.5]) by lelv0327.itg.ti.com (8.15.2/8.15.2) with ESMTP id 32ABrj67017278; Fri, 10 Mar 2023 05:53:45 -0600 Message-ID: <367f6b50-e4cc-c3eb-e8e9-dabd4e044530@ti.com> Date: Fri, 10 Mar 2023 17:23:44 +0530 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.7.1 Subject: Re: [EXTERNAL] Re: [EXTERNAL] Re: [PATCH v3 3/6] soc: ti: pruss: Add pruss_cfg_read()/update() API Content-Language: en-US From: Md Danish Anwar To: Roger Quadros , MD Danish Anwar , "Andrew F. Davis" , Suman Anna , Vignesh Raghavendra , Mathieu Poirier , Bjorn Andersson , Santosh Shilimkar , Nishanth Menon CC: , , , , , , References: <20230306110934.2736465-1-danishanwar@ti.com> <20230306110934.2736465-4-danishanwar@ti.com> <7076208d-7dca-6980-5399-498e55648740@kernel.org> Organization: Texas Instruments In-Reply-To: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Roger, On 09/03/23 17:00, Md Danish Anwar wrote: > Hi Roger, > > On 08/03/23 17:12, Roger Quadros wrote: >> >> >> On 08/03/2023 13:36, Md Danish Anwar wrote: >>> Hi Roger, >>> >>> On 08/03/23 13:57, Roger Quadros wrote: >>>> Hi, >>>> >>>> On 06/03/2023 13:09, MD Danish Anwar wrote: >>>>> From: Suman Anna >>>>> >>>>> Add two new generic API pruss_cfg_read() and pruss_cfg_update() to >>>>> the PRUSS platform driver to allow other drivers to read and program >>>>> respectively a register within the PRUSS CFG sub-module represented >>>>> by a syscon driver. This interface provides a simple way for client >>>> >>>> Do you really need these 2 functions to be public? >>>> I see that later patches (4-6) add APIs for doing specific things >>>> and that should be sufficient than exposing entire CFG space via >>>> pruss_cfg_read/update(). >>>> >>>> >>> >>> I think the intention here is to keep this APIs pruss_cfg_read() and >>> pruss_cfg_update() public so that other drivers can read / modify PRUSS config >>> when needed. >> >> Where are these other drivers? If they don't exist then let's not make provision >> for it now. >> We can provide necessary API helpers when needed instead of letting client drivers >> do what they want as they can be misused and hard to debug. >> > > The ICSSG Ethernet driver uses pruss_cfg_update() API. It is posted upstream in > the series [1]. The ethernet driver series is dependent on this series. In > series [1] we are using pruss_cfg_update() in icssg_config.c file, > icssg_config() API. > > So for this, the API pruss_cfg_update() needs to be public. > > [1] https://lore.kernel.org/all/20230210114957.2667963-3-danishanwar@ti.com/ > I will keep this patch as it is as pruss_cfg_update() needs to be public for ICSSG Ethernet driver and pruss_cfg_read() is kind of a complementary function to update. I will do required changes in other patches and send next revision if that's OK with you. Please let me know. >>> >>> The later patches (4-6) add APIs to do specific thing, but those APIs also >>> eventually call pruss_cfg_read/update(). >> >> They can still call them but they need to be private to pruss.c >> >>> >>>>> drivers without having them to include and parse the CFG syscon node >>>>> within their respective device nodes. Various useful registers and >>>>> macros for certain register bit-fields and their values have also >>>>> been added. >>>>> >>>>> It is the responsibility of the client drivers to reconfigure or >>>>> reset a particular register upon any failures. >>>>> >>>>> Signed-off-by: Suman Anna >>>>> Co-developed-by: Grzegorz Jaszczyk >>>>> Signed-off-by: Grzegorz Jaszczyk >>>>> Signed-off-by: Puranjay Mohan >>>>> --- >>>>> drivers/soc/ti/pruss.c | 41 +++++++++++++ >>>>> include/linux/remoteproc/pruss.h | 102 +++++++++++++++++++++++++++++++ >>>>> 2 files changed, 143 insertions(+) >>>>> >>>>> diff --git a/drivers/soc/ti/pruss.c b/drivers/soc/ti/pruss.c >>>>> index c8053c0d735f..537a3910ffd8 100644 >>>>> --- a/drivers/soc/ti/pruss.c >>>>> +++ b/drivers/soc/ti/pruss.c >>>>> @@ -164,6 +164,47 @@ int pruss_release_mem_region(struct pruss *pruss, >>>>> } >>>>> EXPORT_SYMBOL_GPL(pruss_release_mem_region); >>>> >>>> cheers, >>>> -roger >>> > -- Thanks and Regards, Danish.