From patchwork Tue Jul 13 11:40:49 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mason Zhang X-Patchwork-Id: 12373825 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=-16.8 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 2CE98C07E95 for ; Tue, 13 Jul 2021 11:57:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0D932610C7 for ; Tue, 13 Jul 2021 11:57:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235983AbhGMMAr (ORCPT ); Tue, 13 Jul 2021 08:00:47 -0400 Received: from mailgw02.mediatek.com ([210.61.82.184]:38742 "EHLO mailgw02.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S235797AbhGMMAr (ORCPT ); Tue, 13 Jul 2021 08:00:47 -0400 X-UUID: 902a55c266aa41bd95fdcbfd5356fe29-20210713 X-UUID: 902a55c266aa41bd95fdcbfd5356fe29-20210713 Received: from mtkcas10.mediatek.inc [(172.21.101.39)] by mailgw02.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 1492047116; Tue, 13 Jul 2021 19:57:54 +0800 Received: from mtkcas07.mediatek.inc (172.21.101.84) by mtkmbs01n2.mediatek.inc (172.21.101.79) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Tue, 13 Jul 2021 19:57:52 +0800 Received: from localhost.localdomain (10.15.20.246) by mtkcas07.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Tue, 13 Jul 2021 19:57:52 +0800 From: Mason Zhang To: Mark Brown , Matthias Brugger CC: , , , , , , Mason Zhang Subject: [PATCH 1/2] spi: mediatek: add tick_delay support Date: Tue, 13 Jul 2021 19:40:49 +0800 Message-ID: <20210713114048.29509-1-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 support tick_delay setting, some users need use high-speed spi speed, which can use tick_delay to tuning spi clk timing. Signed-off-by: Mason Zhang --- drivers/spi/spi-mt65xx.c | 11 ++++++++++- include/linux/platform_data/spi-mt65xx.h | 1 + 2 files changed, 11 insertions(+), 1 deletion(-) diff --git a/drivers/spi/spi-mt65xx.c b/drivers/spi/spi-mt65xx.c index 097625d7915e..b34fbc913fd6 100644 --- a/drivers/spi/spi-mt65xx.c +++ b/drivers/spi/spi-mt65xx.c @@ -42,8 +42,9 @@ #define SPI_CFG1_CS_IDLE_OFFSET 0 #define SPI_CFG1_PACKET_LOOP_OFFSET 8 #define SPI_CFG1_PACKET_LENGTH_OFFSET 16 -#define SPI_CFG1_GET_TICK_DLY_OFFSET 30 +#define SPI_CFG1_GET_TICK_DLY_OFFSET 29 +#define SPI_CFG1_GET_TICK_DLY_MASK 0xe0000000 #define SPI_CFG1_CS_IDLE_MASK 0xff #define SPI_CFG1_PACKET_LOOP_MASK 0xff00 #define SPI_CFG1_PACKET_LENGTH_MASK 0x3ff0000 @@ -152,6 +153,7 @@ static const struct mtk_spi_compatible mt6893_compat = { */ static const struct mtk_chip_config mtk_default_chip_info = { .sample_sel = 0, + .tick_delay = 0, }; static const struct of_device_id mtk_spi_of_match[] = { @@ -275,6 +277,13 @@ static int mtk_spi_prepare_message(struct spi_master *master, writel(mdata->pad_sel[spi->chip_select], mdata->base + SPI_PAD_SEL_REG); + /* tick delay */ + reg_val = readl(mdata->base + SPI_CFG1_REG); + reg_val &= ~SPI_CFG1_GET_TICK_DLY_MASK; + reg_val |= ((chip_config->tick_delay & 0x7) + << SPI_CFG1_GET_TICK_DLY_OFFSET); + writel(reg_val, mdata->base + SPI_CFG1_REG); + return 0; } diff --git a/include/linux/platform_data/spi-mt65xx.h b/include/linux/platform_data/spi-mt65xx.h index 65fd5ffd257c..f0db674f07b8 100644 --- a/include/linux/platform_data/spi-mt65xx.h +++ b/include/linux/platform_data/spi-mt65xx.h @@ -12,5 +12,6 @@ /* Board specific platform_data */ struct mtk_chip_config { u32 sample_sel; + u32 tick_delay; }; #endif