From patchwork Sat Jul 15 11:05:57 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: George Stark X-Patchwork-Id: 13314459 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 9CEF0C001B0 for ; Sat, 15 Jul 2023 11:07:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-ID:Date:Subject:CC :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=8kgaMEQ/8YEfv1U2IAO6tkTr3O202CZrIRMvAiG10SU=; b=3gSoUbRn/tXUbh 1RVMDnusCgA+rrc+6Y76VKb1yFT2k4RmsJUJ/q/Kh/PH+pB3dUbhQdPMjq4gN5IcXf0X4nYYzaeEp US6TaBx7bJ1CEfHEV+/NvfU14pfB8jQX8Mt4oBncH2p9n0pJ2Deo+W9AG/DdDqxh49KJ/ynD2LVH8 rslvMIP3bhxMHfDM1FmxEnghyD+NfZue9SqVvPAvaD3pugJPDSB1273eeB+TjTVXUEGcKfLZJQXRD 8GvixyYGc/o0yYJZknXC/Xy0+VO1EV4DwNLbN70Snoo/eoXtfzRjp0wlCP3rmf40Q/MHPZc3OKOXe SiERj4qbtLLQtKI1+6kQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qKd7V-008XR0-1f; Sat, 15 Jul 2023 11:07:25 +0000 Received: from mx1.sberdevices.ru ([37.18.73.165]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qKd7I-008XKh-09; Sat, 15 Jul 2023 11:07:15 +0000 Received: from p-infra-ksmg-sc-msk01 (localhost [127.0.0.1]) by mx1.sberdevices.ru (Postfix) with ESMTP id D7A1F100005; Sat, 15 Jul 2023 14:07:02 +0300 (MSK) DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.sberdevices.ru D7A1F100005 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sberdevices.ru; s=mail; t=1689419222; bh=DW++SCgcxwIjmRUMsxVsWA8vee4FRUorFqSKgGAnm5g=; h=From:To:Subject:Date:Message-ID:MIME-Version:Content-Type:From; b=RAVAdQgyO96POnt/ovs5pN3Xx70UA5jxwWI3bLfn0GJagZ2V+jz1cCwKl4JSgehtI 8FVflHNL3jRqS7UCpiMgOz4A3cQMPE9kNTw2CiK+M5IXNpAJToy8OoPAPzra6iZVvg amGSIA/W2rout6hgBVUg+Rkem85+SHODE8rmpAQiS2WfOwM+xrrIQUHkM5vkM8QHv3 y1HtjPAKAa4KZETc2wDrFBm0sxJpw2LCEAEXa62nUNtKL1SckxwdaJVAzP31zXtyyq eh3O/2+brGdKVulnH08pAbZzKkVcOf3q6gc8gRLfUgFAO5HlOl4ONdw409pLXAvsj3 3dRWRVjLolMtg== Received: from p-i-exch-sc-m01.sberdevices.ru (p-i-exch-sc-m01.sberdevices.ru [172.16.192.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.sberdevices.ru (Postfix) with ESMTPS; Sat, 15 Jul 2023 14:07:02 +0300 (MSK) Received: from localhost.localdomain (100.64.160.123) by p-i-exch-sc-m01.sberdevices.ru (172.16.192.107) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.30; Sat, 15 Jul 2023 14:06:22 +0300 From: George Stark To: , , , , , , , , CC: , , , , Subject: [PATCH v1 0/3] iio: adc: meson: tune init sequence Date: Sat, 15 Jul 2023 14:05:57 +0300 Message-ID: <20230715110654.6035-1-gnstark@sberdevices.ru> X-Mailer: git-send-email 2.41.0 MIME-Version: 1.0 X-Originating-IP: [100.64.160.123] X-ClientProxiedBy: p-i-exch-sc-m02.sberdevices.ru (172.16.192.103) To p-i-exch-sc-m01.sberdevices.ru (172.16.192.107) X-KSMG-Rule-ID: 10 X-KSMG-Message-Action: clean X-KSMG-AntiSpam-Lua-Profiles: 178635 [Jul 15 2023] X-KSMG-AntiSpam-Version: 5.9.59.0 X-KSMG-AntiSpam-Envelope-From: GNStark@sberdevices.ru X-KSMG-AntiSpam-Rate: 0 X-KSMG-AntiSpam-Status: not_detected X-KSMG-AntiSpam-Method: none X-KSMG-AntiSpam-Auth: dkim=none X-KSMG-AntiSpam-Info: LuaCore: 523 523 523027ce26ed1d9067f7a52a4756a876e54db27c, {Tracking_from_domain_doesnt_match_to}, sberdevices.ru:5.0.1,7.1.1;100.64.160.123:7.1.2;127.0.0.199:7.1.2;d41d8cd98f00b204e9800998ecf8427e.com:7.1.1;p-i-exch-sc-m01.sberdevices.ru:5.0.1,7.1.1, FromAlignment: s, {Tracking_white_helo}, ApMailHostAddress: 100.64.160.123 X-MS-Exchange-Organization-SCL: -1 X-KSMG-AntiSpam-Interceptor-Info: scan successful X-KSMG-AntiPhishing: Clean X-KSMG-LinksScanning: Clean X-KSMG-AntiVirus: Kaspersky Secure Mail Gateway, version 2.0.1.6960, bases: 2023/07/15 07:52:00 #21618415 X-KSMG-AntiVirus-Status: Clean, skipped X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230715_040712_453003_7D89E68E X-CRM114-Status: UNSURE ( 9.69 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org This patch is a part of effort to support meson a1 SoC and make meson saradc driver independent from vendor boot code initialization in common. Information was taken from vendor kernel 5.4, 4.19 and vendor uboot 2019. Most of the bits are undocumented at all or it's not said how they affect measuring. All those bits are already initialized in bl* code and since kernel driver dosn't rewrite or reset any registers but only changes some bits at init stage everything works fine. Test procedure is rather simple - one can change those bits in runtime (e.g. using devmem) and try to read channels (cat /sys/bus/platform/drivers/meson-saradc/.../iio:device0/*) changing some of those bits leads to measure procedure errors or abnormal results. Another test is build meson saradc as module, reset adc by reset bit, reload module and compare measure results to those got before reset. George Stark (3): iio: adc: meson: init channels 0,1 input muxes iio: adc: meson: init internal continuous ring counter iio: adc: meson: init voltage control bits drivers/iio/adc/meson_saradc.c | 73 ++++++++++++++++++++++++++++++++++ 1 file changed, 73 insertions(+)