From patchwork Tue Oct 13 10:32:45 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Billy Tsai X-Patchwork-Id: 11835371 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 360B7109B for ; Tue, 13 Oct 2020 10:33:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 234F720878 for ; Tue, 13 Oct 2020 10:33:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387947AbgJMKdO (ORCPT ); Tue, 13 Oct 2020 06:33:14 -0400 Received: from twspam01.aspeedtech.com ([211.20.114.71]:40386 "EHLO twspam01.aspeedtech.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388048AbgJMKdM (ORCPT ); Tue, 13 Oct 2020 06:33:12 -0400 Received: from mail.aspeedtech.com ([192.168.0.24]) by twspam01.aspeedtech.com with ESMTP id 09DAUg2f010593; Tue, 13 Oct 2020 18:30:42 +0800 (GMT-8) (envelope-from billy_tsai@aspeedtech.com) Received: from localhost.localdomain (192.168.10.9) by TWMBX02.aspeed.com (192.168.0.24) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Tue, 13 Oct 2020 18:32:57 +0800 From: Billy Tsai To: , , , , , , , , , , , , , , CC: Subject: [PATCH 3/3] iio: adc: aspeed: Setting ref_voltage in probe Date: Tue, 13 Oct 2020 18:32:45 +0800 Message-ID: <20201013103245.16723-4-billy_tsai@aspeedtech.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20201013103245.16723-1-billy_tsai@aspeedtech.com> References: <20201013103245.16723-1-billy_tsai@aspeedtech.com> MIME-Version: 1.0 X-Originating-IP: [192.168.10.9] X-ClientProxiedBy: TWMBX02.aspeed.com (192.168.0.24) To TWMBX02.aspeed.com (192.168.0.24) X-DNSRBL: X-MAIL: twspam01.aspeedtech.com 09DAUg2f010593 Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org At ast2600 ref_voltage becomes configurable and this property is board dependency. Signed-off-by: Billy Tsai --- .../devicetree/bindings/iio/adc/aspeed_adc.txt | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/iio/adc/aspeed_adc.txt b/Documentation/devicetree/bindings/iio/adc/aspeed_adc.txt index 034fc2ba100e..0ba1980c4e06 100644 --- a/Documentation/devicetree/bindings/iio/adc/aspeed_adc.txt +++ b/Documentation/devicetree/bindings/iio/adc/aspeed_adc.txt @@ -3,8 +3,11 @@ Aspeed ADC This device is a 10-bit converter for 16 voltage channels. All inputs are single ended. +At ast2600, this device split into two individual IPs and each contains 8 voltage channels. + +Chip level dtsi: Required properties: -- compatible: Should be "aspeed,ast2400-adc" or "aspeed,ast2500-adc" +- compatible: Should be "aspeed,ast2400-adc" or "aspeed,ast2500-adc" or "aspeed,ast2600-adc" - reg: memory window mapping address and length - clocks: Input clock used to derive the sample clock. Expected to be the SoC's APB clock. @@ -20,3 +23,14 @@ Example: resets = <&syscon ASPEED_RESET_ADC>; #io-channel-cells = <1>; }; + +Board level dts: +Required properties: +- ref_voltage: (ast2600 only) + - Reference voltage in millivolts for the conversions. + - The range of value is 900 to 2700 mv. + +Example: +&adc0 { + ref_voltage = <2500>; +}; \ No newline at end of file