From patchwork Tue Apr 2 12:35:59 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: 10881517 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 0A79D17EE for ; Tue, 2 Apr 2019 12:37:20 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E2EE82844B for ; Tue, 2 Apr 2019 12:37:19 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id E036B27F93; Tue, 2 Apr 2019 12:37:19 +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=ham 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 5792028756 for ; Tue, 2 Apr 2019 12:37:19 +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=jptFV01Jc7XgwfztgjGMmVo83Mm8K9yPJlP2l3aAeXQ=; b=KPElm31BhU0xWH 9Iere3NNDRNle1QVSvrTF/yNGbCrnOpny/6pPvMGdv8yNRMqSIl6iolIgiPnwu1XpkFlSvSLNhJAR jPb8aaueUaR8HC5AL+GG1GFyTECXYD8toaBGC76de5K1KMRLg5cT22a2rfwgZrQj1oOr7FoqYJ+1N nZHiVTjvM7ZvL9MRrpErPaZ9syJ+F4SlTRaYZS8VbXjjqdr7/9kakOobmEJEtYxXQwopyYwZqh3tW Y1R6ZVVjU9K9nRpYl+nnLqQm9AVlqTQ38DviaeM4OCk/c40/ToK2wcQBIspReBOphw2gI594Yn9oU Ue2Rx0/8WPHg0R4VCFlA==; 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 1hBIfG-0003rJ-8f; Tue, 02 Apr 2019 12:37:18 +0000 Received: from mailgw02.mediatek.com ([216.200.240.185]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1hBIeP-0002eu-KV; Tue, 02 Apr 2019 12:36:34 +0000 X-UUID: 6a8ceb56ab094302a54644eb466de8c8-20190402 X-UUID: 6a8ceb56ab094302a54644eb466de8c8-20190402 Received: from mtkcas67.mediatek.inc [(172.29.193.45)] by mailgw02.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLS) with ESMTP id 40629345; Tue, 02 Apr 2019 04:36:21 -0800 Received: from mtkmbs03n2.mediatek.inc (172.21.101.182) by MTKMBS62N2.mediatek.inc (172.29.193.42) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Tue, 2 Apr 2019 05:36:19 -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; Tue, 2 Apr 2019 20:36:11 +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; Tue, 2 Apr 2019 20:36:10 +0800 From: Qii Wang To: Subject: [PATCH RESEND v6 5/6] i2c: mediatek: Add i2c support for MediaTek MT8183 Date: Tue, 2 Apr 2019 20:35:59 +0800 Message-ID: <1554208560-14817-6-git-send-email-qii.wang@mediatek.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1554208560-14817-1-git-send-email-qii.wang@mediatek.com> References: <1554208560-14817-1-git-send-email-qii.wang@mediatek.com> MIME-Version: 1.0 X-TM-SNTS-SMTP: 9F8051F003967A70845953CDE5D89943199A1F42552708F42BA2D16891A170DA2000:8 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190402_053625_879111_68883556 X-CRM114-Status: GOOD ( 13.22 ) 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 Add i2c compatible for MT8183. Compare to MT2712 i2c controller, MT8183 has different register offsets. Ltiming_reg is added to adjust low width of SCL. Arb clock and dma_sync are needed. Signed-off-by: Qii Wang Reviewed-by: Nicolas Boichat Reviewed-by: Matthias Brugger --- drivers/i2c/busses/i2c-mt65xx.c | 62 +++++++++++++++++++++++++++++++++++++-- 1 file changed, 60 insertions(+), 2 deletions(-) diff --git a/drivers/i2c/busses/i2c-mt65xx.c b/drivers/i2c/busses/i2c-mt65xx.c index 6137ad7..745b0d0 100644 --- a/drivers/i2c/busses/i2c-mt65xx.c +++ b/drivers/i2c/busses/i2c-mt65xx.c @@ -133,6 +133,7 @@ enum I2C_REGS_OFFSET { OFFSET_DEBUGCTRL, OFFSET_TRANSFER_LEN_AUX, OFFSET_CLOCK_DIV, + OFFSET_LTIMING, }; static const u16 mt_i2c_regs_v1[] = { @@ -162,6 +163,32 @@ enum I2C_REGS_OFFSET { [OFFSET_CLOCK_DIV] = 0x70, }; +static const u16 mt_i2c_regs_v2[] = { + [OFFSET_DATA_PORT] = 0x0, + [OFFSET_SLAVE_ADDR] = 0x4, + [OFFSET_INTR_MASK] = 0x8, + [OFFSET_INTR_STAT] = 0xc, + [OFFSET_CONTROL] = 0x10, + [OFFSET_TRANSFER_LEN] = 0x14, + [OFFSET_TRANSAC_LEN] = 0x18, + [OFFSET_DELAY_LEN] = 0x1c, + [OFFSET_TIMING] = 0x20, + [OFFSET_START] = 0x24, + [OFFSET_EXT_CONF] = 0x28, + [OFFSET_LTIMING] = 0x2c, + [OFFSET_HS] = 0x30, + [OFFSET_IO_CONFIG] = 0x34, + [OFFSET_FIFO_ADDR_CLR] = 0x38, + [OFFSET_TRANSFER_LEN_AUX] = 0x44, + [OFFSET_CLOCK_DIV] = 0x48, + [OFFSET_SOFTRESET] = 0x50, + [OFFSET_DEBUGSTAT] = 0xe0, + [OFFSET_DEBUGCTRL] = 0xe8, + [OFFSET_FIFO_STAT] = 0xf4, + [OFFSET_FIFO_THRESH] = 0xf8, + [OFFSET_DCM_EN] = 0xf88, +}; + struct mtk_i2c_compatible { const struct i2c_adapter_quirks *quirks; const u16 *regs; @@ -172,6 +199,7 @@ struct mtk_i2c_compatible { unsigned char support_33bits: 1; unsigned char timing_adjust: 1; unsigned char dma_sync: 1; + unsigned char ltiming_adjust: 1; }; struct mtk_i2c { @@ -195,6 +223,7 @@ struct mtk_i2c { enum mtk_trans_op op; u16 timing_reg; u16 high_speed_reg; + u16 ltiming_reg; unsigned char auto_restart; bool ignore_restart_irq; const struct mtk_i2c_compatible *dev_comp; @@ -222,6 +251,7 @@ struct mtk_i2c { .support_33bits = 1, .timing_adjust = 1, .dma_sync = 0, + .ltiming_adjust = 0, }; static const struct mtk_i2c_compatible mt6577_compat = { @@ -234,6 +264,7 @@ struct mtk_i2c { .support_33bits = 0, .timing_adjust = 0, .dma_sync = 0, + .ltiming_adjust = 0, }; static const struct mtk_i2c_compatible mt6589_compat = { @@ -246,6 +277,7 @@ struct mtk_i2c { .support_33bits = 0, .timing_adjust = 0, .dma_sync = 0, + .ltiming_adjust = 0, }; static const struct mtk_i2c_compatible mt7622_compat = { @@ -258,6 +290,7 @@ struct mtk_i2c { .support_33bits = 0, .timing_adjust = 0, .dma_sync = 0, + .ltiming_adjust = 0, }; static const struct mtk_i2c_compatible mt8173_compat = { @@ -269,6 +302,19 @@ struct mtk_i2c { .support_33bits = 1, .timing_adjust = 0, .dma_sync = 0, + .ltiming_adjust = 0, +}; + +static const struct mtk_i2c_compatible mt8183_compat = { + .regs = mt_i2c_regs_v2, + .pmic_i2c = 0, + .dcm = 0, + .auto_restart = 1, + .aux_len_reg = 1, + .support_33bits = 1, + .timing_adjust = 1, + .dma_sync = 1, + .ltiming_adjust = 1, }; static const struct of_device_id mtk_i2c_of_match[] = { @@ -277,6 +323,7 @@ struct mtk_i2c { { .compatible = "mediatek,mt6589-i2c", .data = &mt6589_compat }, { .compatible = "mediatek,mt7622-i2c", .data = &mt7622_compat }, { .compatible = "mediatek,mt8173-i2c", .data = &mt8173_compat }, + { .compatible = "mediatek,mt8183-i2c", .data = &mt8183_compat }, {} }; MODULE_DEVICE_TABLE(of, mtk_i2c_of_match); @@ -361,6 +408,8 @@ static void mtk_i2c_init_hw(struct mtk_i2c *i2c) mtk_i2c_writew(i2c, i2c->timing_reg, OFFSET_TIMING); mtk_i2c_writew(i2c, i2c->high_speed_reg, OFFSET_HS); + if (i2c->dev_comp->ltiming_adjust) + mtk_i2c_writew(i2c, i2c->ltiming_reg, OFFSET_LTIMING); /* If use i2c pin from PMIC mt6397 side, need set PATH_DIR first */ if (i2c->have_pmic) @@ -460,6 +509,8 @@ static int mtk_i2c_set_speed(struct mtk_i2c *i2c, unsigned int parent_clk) unsigned int clk_src; unsigned int step_cnt; unsigned int sample_cnt; + unsigned int l_step_cnt; + unsigned int l_sample_cnt; unsigned int target_speed; int ret; @@ -469,11 +520,11 @@ static int mtk_i2c_set_speed(struct mtk_i2c *i2c, unsigned int parent_clk) if (target_speed > MAX_FS_MODE_SPEED) { /* Set master code speed register */ ret = mtk_i2c_calculate_speed(i2c, clk_src, MAX_FS_MODE_SPEED, - &step_cnt, &sample_cnt); + &l_step_cnt, &l_sample_cnt); if (ret < 0) return ret; - i2c->timing_reg = (sample_cnt << 8) | step_cnt; + i2c->timing_reg = (l_sample_cnt << 8) | l_step_cnt; /* Set the high speed mode register */ ret = mtk_i2c_calculate_speed(i2c, clk_src, target_speed, @@ -483,6 +534,10 @@ static int mtk_i2c_set_speed(struct mtk_i2c *i2c, unsigned int parent_clk) i2c->high_speed_reg = I2C_TIME_DEFAULT_VALUE | (sample_cnt << 12) | (step_cnt << 8); + + if (i2c->dev_comp->ltiming_adjust) + i2c->ltiming_reg = (l_sample_cnt << 6) | l_step_cnt | + (sample_cnt << 12) | (step_cnt << 9); } else { ret = mtk_i2c_calculate_speed(i2c, clk_src, target_speed, &step_cnt, &sample_cnt); @@ -493,6 +548,9 @@ static int mtk_i2c_set_speed(struct mtk_i2c *i2c, unsigned int parent_clk) /* Disable the high speed transaction */ i2c->high_speed_reg = I2C_TIME_CLR_VALUE; + + if (i2c->dev_comp->ltiming_adjust) + i2c->ltiming_reg = (sample_cnt << 6) | step_cnt; } return 0;