From patchwork Mon Mar 11 05:40:38 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?UWlpIFdhbmcgKOeOi+eQqik=?= X-Patchwork-Id: 10846723 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 9F7646C2 for ; Mon, 11 Mar 2019 05:42:21 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8785F28E19 for ; Mon, 11 Mar 2019 05:42:21 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 7BD9828ED5; Mon, 11 Mar 2019 05:42:21 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED,UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 2C58B28E19 for ; Mon, 11 Mar 2019 05:42:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=NpRdf2JmSTQcd4RNyPb/4PowWNGndjjNJNtkrD2DZKE=; b=mbo25pVM8ZVqCr jLrhjlglybRDe7Cb0jvTxUMBoPafl5jKY8fGSvN3+XHjVnxWoSm0mobHjl+2X+gRSQTSz2rEyc87K 9LX3y6Fcvk1HZ6pJoWah/9h7ozxpOlSxVDinT/tl3NQbwqVHqAVKL6Rf2FRuhAeZVxYGqCNY0rqmu QFCmmAsBWRNxDGR9+ifJWp3ycxnwYo+lmnOlta7wrmfg97Nvp6iTf0WgN1z8kgefm5O/VknXox2Ip jpxD8GiLNllxaYhq8naR8Z63H/0pxI0CAoArkD15/u5N2Yy75YgiXItHVwlpjDPugCl+eM9nYbx1U YwdRLCQQxOKW5o0nVNxw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1h3DhR-0004Ns-DL; Mon, 11 Mar 2019 05:42:09 +0000 Received: from mailgw01.mediatek.com ([216.200.240.184]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1h3Dge-0003Dj-E0; Mon, 11 Mar 2019 05:41:24 +0000 X-UUID: ee58f1e4660747a6b84163ee290bc4c4-20190310 X-UUID: ee58f1e4660747a6b84163ee290bc4c4-20190310 Received: from mtkcas68.mediatek.inc [(172.29.94.19)] by mailgw01.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLS) with ESMTP id 928546862; Sun, 10 Mar 2019 21:41:14 -0800 Received: from mtkmbs03n2.mediatek.inc (172.21.101.182) by MTKMBS62N1.mediatek.inc (172.29.193.41) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Sun, 10 Mar 2019 22:41:12 -0700 Received: from mtkcas09.mediatek.inc (172.21.101.178) by mtkmbs03n2.mediatek.inc (172.21.101.182) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Mon, 11 Mar 2019 13:41:10 +0800 Received: from localhost.localdomain (10.17.3.153) by mtkcas09.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Mon, 11 Mar 2019 13:41:10 +0800 From: Qii Wang To: Subject: [PATCH v6 4/6] i2c: mediatek: Add i2c and apdma sync in i2c driver Date: Mon, 11 Mar 2019 13:40:38 +0800 Message-ID: <1552282840-12778-5-git-send-email-qii.wang@mediatek.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1552282840-12778-1-git-send-email-qii.wang@mediatek.com> References: <1552282840-12778-1-git-send-email-qii.wang@mediatek.com> MIME-Version: 1.0 X-TM-SNTS-SMTP: 59F907CC2C80A94B60F21362E48223A79055842444E5E5838767CF9DFCEB56B72000:8 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190310_224120_761681_4E82CF67 X-CRM114-Status: UNSURE ( 8.92 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, qii.wang@mediatek.com, srv_heupstream@mediatek.com, robh@kernel.org, leilk.liu@mediatek.com, xinping.qian@mediatek.com, linux-kernel@vger.kernel.org, liguo.zhang@mediatek.com, linux-mediatek@lists.infradead.org, linux-i2c@vger.kernel.org, linux-arm-kernel@lists.infradead.org Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+patchwork-linux-mediatek=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP When i2c and apdma use different source clocks, we should enable synchronization between them. Signed-off-by: Qii Wang Reviewed-by: Nicolas Boichat --- drivers/i2c/busses/i2c-mt65xx.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/i2c/busses/i2c-mt65xx.c b/drivers/i2c/busses/i2c-mt65xx.c index 1a7235e..6137ad7 100644 --- a/drivers/i2c/busses/i2c-mt65xx.c +++ b/drivers/i2c/busses/i2c-mt65xx.c @@ -77,6 +77,8 @@ #define I2C_CONTROL_DIR_CHANGE (0x1 << 4) #define I2C_CONTROL_ACKERR_DET_EN (0x1 << 5) #define I2C_CONTROL_TRANSFER_LEN_CHANGE (0x1 << 6) +#define I2C_CONTROL_DMAACK_EN (0x1 << 8) +#define I2C_CONTROL_ASYNC_MODE (0x1 << 9) #define I2C_CONTROL_WRAPPER (0x1 << 0) #define I2C_DRV_NAME "i2c-mt65xx" @@ -169,6 +171,7 @@ struct mtk_i2c_compatible { unsigned char aux_len_reg: 1; unsigned char support_33bits: 1; unsigned char timing_adjust: 1; + unsigned char dma_sync: 1; }; struct mtk_i2c { @@ -218,6 +221,7 @@ struct mtk_i2c { .aux_len_reg = 1, .support_33bits = 1, .timing_adjust = 1, + .dma_sync = 0, }; static const struct mtk_i2c_compatible mt6577_compat = { @@ -229,6 +233,7 @@ struct mtk_i2c { .aux_len_reg = 0, .support_33bits = 0, .timing_adjust = 0, + .dma_sync = 0, }; static const struct mtk_i2c_compatible mt6589_compat = { @@ -240,6 +245,7 @@ struct mtk_i2c { .aux_len_reg = 0, .support_33bits = 0, .timing_adjust = 0, + .dma_sync = 0, }; static const struct mtk_i2c_compatible mt7622_compat = { @@ -251,6 +257,7 @@ struct mtk_i2c { .aux_len_reg = 1, .support_33bits = 0, .timing_adjust = 0, + .dma_sync = 0, }; static const struct mtk_i2c_compatible mt8173_compat = { @@ -261,6 +268,7 @@ struct mtk_i2c { .aux_len_reg = 1, .support_33bits = 1, .timing_adjust = 0, + .dma_sync = 0, }; static const struct of_device_id mtk_i2c_of_match[] = { @@ -360,6 +368,9 @@ static void mtk_i2c_init_hw(struct mtk_i2c *i2c) control_reg = I2C_CONTROL_ACKERR_DET_EN | I2C_CONTROL_CLK_EXT_EN | I2C_CONTROL_DMA_EN; + if (i2c->dev_comp->dma_sync) + control_reg |= I2C_CONTROL_DMAACK_EN | I2C_CONTROL_ASYNC_MODE; + mtk_i2c_writew(i2c, control_reg, OFFSET_CONTROL); mtk_i2c_writew(i2c, I2C_DELAY_LEN, OFFSET_DELAY_LEN);