From patchwork Mon Jul 19 09:17:08 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mason Zhang X-Patchwork-Id: 480258 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, UNPARSEABLE_RELAY, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 17DD6C636C9 for ; Mon, 19 Jul 2021 09:33:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0137161165 for ; Mon, 19 Jul 2021 09:33:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236054AbhGSIwu (ORCPT ); Mon, 19 Jul 2021 04:52:50 -0400 Received: from mailgw01.mediatek.com ([60.244.123.138]:51032 "EHLO mailgw01.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S235963AbhGSIws (ORCPT ); Mon, 19 Jul 2021 04:52:48 -0400 X-UUID: 99e2966c8f2a4c629b1003e16592dc69-20210719 X-UUID: 99e2966c8f2a4c629b1003e16592dc69-20210719 Received: from mtkmbs10n1.mediatek.inc [(172.21.101.34)] by mailgw01.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 1241152251; Mon, 19 Jul 2021 17:33:26 +0800 Received: from mtkcas11.mediatek.inc (172.21.101.40) by mtkmbs01n2.mediatek.inc (172.21.101.79) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Mon, 19 Jul 2021 17:33:24 +0800 Received: from localhost.localdomain (10.15.20.246) by mtkcas11.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Mon, 19 Jul 2021 17:33:24 +0800 From: Mason Zhang To: Mark Brown , Matthias Brugger CC: , , , , , , Mason Zhang Subject: [PATCH 3/3] spi: mediatek: modify set_cs_timing callback Date: Mon, 19 Jul 2021 17:17:08 +0800 Message-ID: <20210719091707.31664-1-mason.zhang@mediatek.com> X-Mailer: git-send-email 2.18.0 MIME-Version: 1.0 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org From: Mason Zhang This patch modified set_cs_timing callback: 1. support spi_device set cs_timing in their driver; 2. support set absolute time but no clk count, because; clk src will change in different platform; 3. call this function in prepare_message but not in other API. Signed-off-by: Mason Zhang --- drivers/spi/spi-mt65xx.c | 102 +++++++++++++++++++++------------------ 1 file changed, 56 insertions(+), 46 deletions(-) diff --git a/drivers/spi/spi-mt65xx.c b/drivers/spi/spi-mt65xx.c index 6f2925118b98..7a34f5b1201d 100644 --- a/drivers/spi/spi-mt65xx.c +++ b/drivers/spi/spi-mt65xx.c @@ -208,6 +208,60 @@ static void mtk_spi_reset(struct mtk_spi *mdata) writel(reg_val, mdata->base + SPI_CMD_REG); } +static int mtk_spi_set_hw_cs_timing(struct spi_device *spi) +{ + struct mtk_spi *mdata = spi_master_get_devdata(spi->master); + struct spi_delay *cs_setup = &spi->cs_setup; + struct spi_delay *cs_hold = &spi->cs_hold; + struct spi_delay *cs_inactive = &spi->cs_inactive; + u16 setup, hold, inactive; + u32 reg_val; + int delay; + + delay = spi_delay_to_ns(cs_setup, NULL); + if (delay < 0) + return delay; + setup = (delay / 1000) * DIV_ROUND_UP(mdata->spi_clk_hz, 1000000); + + delay = spi_delay_to_ns(cs_hold, NULL); + if (delay < 0) + return delay; + hold = (delay / 1000) * DIV_ROUND_UP(mdata->spi_clk_hz, 1000000); + + delay = spi_delay_to_ns(cs_inactive, NULL); + if (delay < 0) + return delay; + inactive = (delay / 1000) * DIV_ROUND_UP(mdata->spi_clk_hz, 1000000); + + setup = setup ? setup : 1; + hold = hold ? hold : 1; + inactive = inactive ? inactive : 1; + + reg_val = readl(mdata->base + SPI_CFG0_REG); + if (mdata->dev_comp->enhance_timing) { + reg_val &= ~(0xffff << SPI_ADJUST_CFG0_CS_HOLD_OFFSET); + reg_val |= (((hold - 1) & 0xffff) + << SPI_ADJUST_CFG0_CS_HOLD_OFFSET); + reg_val &= ~(0xffff << SPI_ADJUST_CFG0_CS_SETUP_OFFSET); + reg_val |= (((setup - 1) & 0xffff) + << SPI_ADJUST_CFG0_CS_SETUP_OFFSET); + } else { + reg_val &= ~(0xff << SPI_CFG0_CS_HOLD_OFFSET); + reg_val |= (((hold - 1) & 0xff) << SPI_CFG0_CS_HOLD_OFFSET); + reg_val &= ~(0xff << SPI_CFG0_CS_SETUP_OFFSET); + reg_val |= (((setup - 1) & 0xff) + << SPI_CFG0_CS_SETUP_OFFSET); + } + writel(reg_val, mdata->base + SPI_CFG0_REG); + + reg_val = readl(mdata->base + SPI_CFG1_REG); + reg_val &= ~SPI_CFG1_CS_IDLE_MASK; + reg_val |= (((inactive - 1) & 0xff) << SPI_CFG1_CS_IDLE_OFFSET); + writel(reg_val, mdata->base + SPI_CFG1_REG); + + return 0; +} + static int mtk_spi_prepare_message(struct spi_master *master, struct spi_message *msg) { @@ -284,6 +338,8 @@ static int mtk_spi_prepare_message(struct spi_master *master, << SPI_CFG1_GET_TICK_DLY_OFFSET); writel(reg_val, mdata->base + SPI_CFG1_REG); + /* set hw cs timing */ + mtk_spi_set_hw_cs_timing(spi); return 0; } @@ -528,52 +584,6 @@ static bool mtk_spi_can_dma(struct spi_master *master, (unsigned long)xfer->rx_buf % 4 == 0); } -static int mtk_spi_set_hw_cs_timing(struct spi_device *spi, - struct spi_delay *setup, - struct spi_delay *hold, - struct spi_delay *inactive) -{ - struct mtk_spi *mdata = spi_master_get_devdata(spi->master); - u16 setup_dly, hold_dly, inactive_dly; - u32 reg_val; - - if ((setup && setup->unit != SPI_DELAY_UNIT_SCK) || - (hold && hold->unit != SPI_DELAY_UNIT_SCK) || - (inactive && inactive->unit != SPI_DELAY_UNIT_SCK)) { - dev_err(&spi->dev, - "Invalid delay unit, should be SPI_DELAY_UNIT_SCK\n"); - return -EINVAL; - } - - setup_dly = setup ? setup->value : 1; - hold_dly = hold ? hold->value : 1; - inactive_dly = inactive ? inactive->value : 1; - - reg_val = readl(mdata->base + SPI_CFG0_REG); - if (mdata->dev_comp->enhance_timing) { - reg_val &= ~(0xffff << SPI_ADJUST_CFG0_CS_HOLD_OFFSET); - reg_val |= (((hold_dly - 1) & 0xffff) - << SPI_ADJUST_CFG0_CS_HOLD_OFFSET); - reg_val &= ~(0xffff << SPI_ADJUST_CFG0_CS_SETUP_OFFSET); - reg_val |= (((setup_dly - 1) & 0xffff) - << SPI_ADJUST_CFG0_CS_SETUP_OFFSET); - } else { - reg_val &= ~(0xff << SPI_CFG0_CS_HOLD_OFFSET); - reg_val |= (((hold_dly - 1) & 0xff) << SPI_CFG0_CS_HOLD_OFFSET); - reg_val &= ~(0xff << SPI_CFG0_CS_SETUP_OFFSET); - reg_val |= (((setup_dly - 1) & 0xff) - << SPI_CFG0_CS_SETUP_OFFSET); - } - writel(reg_val, mdata->base + SPI_CFG0_REG); - - reg_val = readl(mdata->base + SPI_CFG1_REG); - reg_val &= ~SPI_CFG1_CS_IDLE_MASK; - reg_val |= (((inactive_dly - 1) & 0xff) << SPI_CFG1_CS_IDLE_OFFSET); - writel(reg_val, mdata->base + SPI_CFG1_REG); - - return 0; -} - static int mtk_spi_setup(struct spi_device *spi) { struct mtk_spi *mdata = spi_master_get_devdata(spi->master);