From patchwork Mon Jun 7 10:57:57 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jon Lin X-Patchwork-Id: 12303165 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,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 B7C05C48BD1 for ; Mon, 7 Jun 2021 10:58:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A0BF061205 for ; Mon, 7 Jun 2021 10:58:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231185AbhFGLAT (ORCPT ); Mon, 7 Jun 2021 07:00:19 -0400 Received: from lucky1.263xmail.com ([211.157.147.135]:44076 "EHLO lucky1.263xmail.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230374AbhFGLAS (ORCPT ); Mon, 7 Jun 2021 07:00:18 -0400 Received: from localhost (unknown [192.168.167.105]) by lucky1.263xmail.com (Postfix) with ESMTP id BAA65AC8AC; Mon, 7 Jun 2021 18:58:07 +0800 (CST) X-MAIL-GRAY: 0 X-MAIL-DELIVERY: 1 X-ADDR-CHECKED4: 1 X-ANTISPAM-LEVEL: 2 X-ABS-CHECKED: 0 Received: from localhost.localdomain (unknown [58.22.7.114]) by smtp.263.net (postfix) whith ESMTP id P26721T140687081854720S1623063484717111_; Mon, 07 Jun 2021 18:58:08 +0800 (CST) X-IP-DOMAINF: 1 X-UNIQUE-TAG: <61fcc8ec8f72af7af9b060e2a82bcd38> X-RL-SENDER: jon.lin@rock-chips.com X-SENDER: jon.lin@rock-chips.com X-LOGIN-NAME: jon.lin@rock-chips.com X-FST-TO: broonie@kernel.org X-RCPT-COUNT: 9 X-SENDER-IP: 58.22.7.114 X-ATTACHMENT-NUM: 0 X-System-Flag: 0 From: Jon Lin To: broonie@kernel.org Cc: jon.lin@rock-chips.com, heiko@sntech.de, robh+dt@kernel.org, linux-spi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org Subject: [PATCH v5 1/6] dt-bindings: spi: spi-rockchip: add description for rv1126 Date: Mon, 7 Jun 2021 18:57:57 +0800 Message-Id: <20210607105802.23796-2-jon.lin@rock-chips.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210607105802.23796-1-jon.lin@rock-chips.com> References: <20210607105802.23796-1-jon.lin@rock-chips.com> Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org The description below will be used for rv1126.dtsi or compatible one in the future Signed-off-by: Jon Lin --- Changes in v5: - Change to leave one compatible id rv1126, and rk3568 is compatible with rv1126 Changes in v4: - Adjust the order patches - Simply commit massage like redundancy "application" content Changes in v3: - Fix compile error which is find by Sascha in [v2,2/8] Documentation/devicetree/bindings/spi/spi-rockchip.yaml | 1 + 1 file changed, 1 insertion(+) diff --git a/Documentation/devicetree/bindings/spi/spi-rockchip.yaml b/Documentation/devicetree/bindings/spi/spi-rockchip.yaml index 1e6cf29e6388..50d98c8f372c 100644 --- a/Documentation/devicetree/bindings/spi/spi-rockchip.yaml +++ b/Documentation/devicetree/bindings/spi/spi-rockchip.yaml @@ -34,6 +34,7 @@ properties: - rockchip,rk3368-spi - rockchip,rk3399-spi - const: rockchip,rk3066-spi + - const: rockchip,rv1126-spi reg: maxItems: 1 From patchwork Mon Jun 7 10:57:58 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jon Lin X-Patchwork-Id: 12303159 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,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 68329C48BCF for ; Mon, 7 Jun 2021 10:58:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 528196124C for ; Mon, 7 Jun 2021 10:58:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231180AbhFGLAT (ORCPT ); Mon, 7 Jun 2021 07:00:19 -0400 Received: from lucky1.263xmail.com ([211.157.147.133]:57238 "EHLO lucky1.263xmail.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230231AbhFGLAR (ORCPT ); Mon, 7 Jun 2021 07:00:17 -0400 Received: from localhost (unknown [192.168.167.105]) by lucky1.263xmail.com (Postfix) with ESMTP id 89166CD684; Mon, 7 Jun 2021 18:58:09 +0800 (CST) X-MAIL-GRAY: 0 X-MAIL-DELIVERY: 1 X-ADDR-CHECKED4: 1 X-ANTISPAM-LEVEL: 2 X-ABS-CHECKED: 0 Received: from localhost.localdomain (unknown [58.22.7.114]) by smtp.263.net (postfix) whith ESMTP id P26721T140687081854720S1623063484717111_; Mon, 07 Jun 2021 18:58:09 +0800 (CST) X-IP-DOMAINF: 1 X-UNIQUE-TAG: <8358e8e0d781dbfc305596f17130c079> X-RL-SENDER: jon.lin@rock-chips.com X-SENDER: jon.lin@rock-chips.com X-LOGIN-NAME: jon.lin@rock-chips.com X-FST-TO: broonie@kernel.org X-RCPT-COUNT: 9 X-SENDER-IP: 58.22.7.114 X-ATTACHMENT-NUM: 0 X-System-Flag: 0 From: Jon Lin To: broonie@kernel.org Cc: jon.lin@rock-chips.com, heiko@sntech.de, robh+dt@kernel.org, linux-spi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org Subject: [PATCH v5 2/6] spi: rockchip: add compatible string for rv1126 and rk3568 Date: Mon, 7 Jun 2021 18:57:58 +0800 Message-Id: <20210607105802.23796-3-jon.lin@rock-chips.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210607105802.23796-1-jon.lin@rock-chips.com> References: <20210607105802.23796-1-jon.lin@rock-chips.com> Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org Add compatible string for rv1126 and rk3568 for potential applications. Signed-off-by: Jon Lin --- Changes in v5: None Changes in v4: None Changes in v3: None drivers/spi/spi-rockchip.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/spi/spi-rockchip.c b/drivers/spi/spi-rockchip.c index 52d6259d96ed..bbeed3ae4ee1 100644 --- a/drivers/spi/spi-rockchip.c +++ b/drivers/spi/spi-rockchip.c @@ -922,6 +922,7 @@ static const struct of_device_id rockchip_spi_dt_match[] = { { .compatible = "rockchip,rk3368-spi", }, { .compatible = "rockchip,rk3399-spi", }, { .compatible = "rockchip,rv1108-spi", }, + { .compatible = "rockchip,rv1126-spi", }, { }, }; MODULE_DEVICE_TABLE(of, rockchip_spi_dt_match); From patchwork Mon Jun 7 10:57:59 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jon Lin X-Patchwork-Id: 12303163 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,USER_AGENT_GIT autolearn=unavailable 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 CD4DAC47094 for ; Mon, 7 Jun 2021 10:58:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B968C6127C for ; Mon, 7 Jun 2021 10:58:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231160AbhFGLAS (ORCPT ); Mon, 7 Jun 2021 07:00:18 -0400 Received: from lucky1.263xmail.com ([211.157.147.130]:54128 "EHLO lucky1.263xmail.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230131AbhFGLAR (ORCPT ); Mon, 7 Jun 2021 07:00:17 -0400 Received: from localhost (unknown [192.168.167.105]) by lucky1.263xmail.com (Postfix) with ESMTP id 74FE2D1A9E; Mon, 7 Jun 2021 18:58:13 +0800 (CST) X-MAIL-GRAY: 0 X-MAIL-DELIVERY: 1 X-ADDR-CHECKED4: 1 X-ANTISPAM-LEVEL: 2 X-ABS-CHECKED: 0 Received: from localhost.localdomain (unknown [58.22.7.114]) by smtp.263.net (postfix) whith ESMTP id P26721T140687081854720S1623063484717111_; Mon, 07 Jun 2021 18:58:13 +0800 (CST) X-IP-DOMAINF: 1 X-UNIQUE-TAG: <0b13c905734baec9157f6eed86240492> X-RL-SENDER: jon.lin@rock-chips.com X-SENDER: jon.lin@rock-chips.com X-LOGIN-NAME: jon.lin@rock-chips.com X-FST-TO: broonie@kernel.org X-RCPT-COUNT: 9 X-SENDER-IP: 58.22.7.114 X-ATTACHMENT-NUM: 0 X-System-Flag: 0 From: Jon Lin To: broonie@kernel.org Cc: jon.lin@rock-chips.com, heiko@sntech.de, robh+dt@kernel.org, linux-spi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org Subject: [PATCH v5 3/6] spi: rockchip: Set rx_fifo interrupt waterline base on transfer item Date: Mon, 7 Jun 2021 18:57:59 +0800 Message-Id: <20210607105802.23796-4-jon.lin@rock-chips.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210607105802.23796-1-jon.lin@rock-chips.com> References: <20210607105802.23796-1-jon.lin@rock-chips.com> Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org The error here is to calculate the width as 8 bits. In fact, 16 bits should be considered. Signed-off-by: Jon Lin --- Changes in v5: None Changes in v4: None Changes in v3: None drivers/spi/spi-rockchip.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/spi/spi-rockchip.c b/drivers/spi/spi-rockchip.c index bbeed3ae4ee1..0887b19ef3ad 100644 --- a/drivers/spi/spi-rockchip.c +++ b/drivers/spi/spi-rockchip.c @@ -540,8 +540,8 @@ static int rockchip_spi_config(struct rockchip_spi *rs, * interrupt exactly when the fifo is full doesn't seem to work, * so we need the strict inequality here */ - if (xfer->len < rs->fifo_len) - writel_relaxed(xfer->len - 1, rs->regs + ROCKCHIP_SPI_RXFTLR); + if ((xfer->len / rs->n_bytes) < rs->fifo_len) + writel_relaxed(xfer->len / rs->n_bytes - 1, rs->regs + ROCKCHIP_SPI_RXFTLR); else writel_relaxed(rs->fifo_len / 2 - 1, rs->regs + ROCKCHIP_SPI_RXFTLR); From patchwork Mon Jun 7 10:58:00 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jon Lin X-Patchwork-Id: 12303161 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,USER_AGENT_GIT autolearn=unavailable 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 A12E9C47082 for ; Mon, 7 Jun 2021 10:58:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 86B1161107 for ; Mon, 7 Jun 2021 10:58:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231158AbhFGLAS (ORCPT ); Mon, 7 Jun 2021 07:00:18 -0400 Received: from lucky1.263xmail.com ([211.157.147.134]:46238 "EHLO lucky1.263xmail.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230219AbhFGLAR (ORCPT ); Mon, 7 Jun 2021 07:00:17 -0400 Received: from localhost (unknown [192.168.167.105]) by lucky1.263xmail.com (Postfix) with ESMTP id F3F47C8514; Mon, 7 Jun 2021 18:58:13 +0800 (CST) X-MAIL-GRAY: 0 X-MAIL-DELIVERY: 1 X-ADDR-CHECKED4: 1 X-ANTISPAM-LEVEL: 2 X-ABS-CHECKED: 0 Received: from localhost.localdomain (unknown [58.22.7.114]) by smtp.263.net (postfix) whith ESMTP id P26721T140687081854720S1623063484717111_; Mon, 07 Jun 2021 18:58:14 +0800 (CST) X-IP-DOMAINF: 1 X-UNIQUE-TAG: <43ff78922428f1379b2c45f9dc166628> X-RL-SENDER: jon.lin@rock-chips.com X-SENDER: jon.lin@rock-chips.com X-LOGIN-NAME: jon.lin@rock-chips.com X-FST-TO: broonie@kernel.org X-RCPT-COUNT: 9 X-SENDER-IP: 58.22.7.114 X-ATTACHMENT-NUM: 0 X-System-Flag: 0 From: Jon Lin To: broonie@kernel.org Cc: jon.lin@rock-chips.com, heiko@sntech.de, robh+dt@kernel.org, linux-spi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org Subject: [PATCH v5 4/6] spi: rockchip: Wait for STB status in slave mode tx_xfer Date: Mon, 7 Jun 2021 18:58:00 +0800 Message-Id: <20210607105802.23796-5-jon.lin@rock-chips.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210607105802.23796-1-jon.lin@rock-chips.com> References: <20210607105802.23796-1-jon.lin@rock-chips.com> Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org After ROCKCHIP_SPI_VER2_TYPE2, SR->STB is a more accurate judgment bit for spi slave transmition. Signed-off-by: Jon Lin --- Changes in v5: None Changes in v4: None Changes in v3: None drivers/spi/spi-rockchip.c | 21 ++++++++++++++------- 1 file changed, 14 insertions(+), 7 deletions(-) diff --git a/drivers/spi/spi-rockchip.c b/drivers/spi/spi-rockchip.c index 0887b19ef3ad..950d3bce443b 100644 --- a/drivers/spi/spi-rockchip.c +++ b/drivers/spi/spi-rockchip.c @@ -116,13 +116,14 @@ #define BAUDR_SCKDV_MIN 2 #define BAUDR_SCKDV_MAX 65534 -/* Bit fields in SR, 5bit */ -#define SR_MASK 0x1f +/* Bit fields in SR, 6bit */ +#define SR_MASK 0x3f #define SR_BUSY (1 << 0) #define SR_TF_FULL (1 << 1) #define SR_TF_EMPTY (1 << 2) #define SR_RF_EMPTY (1 << 3) #define SR_RF_FULL (1 << 4) +#define SR_SLAVE_TX_BUSY (1 << 5) /* Bit fields in ISR, IMR, ISR, RISR, 5bit */ #define INT_MASK 0x1f @@ -197,13 +198,19 @@ static inline void spi_enable_chip(struct rockchip_spi *rs, bool enable) writel_relaxed((enable ? 1U : 0U), rs->regs + ROCKCHIP_SPI_SSIENR); } -static inline void wait_for_idle(struct rockchip_spi *rs) +static inline void wait_for_tx_idle(struct rockchip_spi *rs, bool slave_mode) { unsigned long timeout = jiffies + msecs_to_jiffies(5); do { - if (!(readl_relaxed(rs->regs + ROCKCHIP_SPI_SR) & SR_BUSY)) - return; + if (slave_mode) { + if (!(readl_relaxed(rs->regs + ROCKCHIP_SPI_SR) & SR_SLAVE_TX_BUSY) && + !((readl_relaxed(rs->regs + ROCKCHIP_SPI_SR) & SR_BUSY))) + return; + } else { + if (!(readl_relaxed(rs->regs + ROCKCHIP_SPI_SR) & SR_BUSY)) + return; + } } while (!time_after(jiffies, timeout)); dev_warn(rs->dev, "spi controller is in busy state!\n"); @@ -383,7 +390,7 @@ static void rockchip_spi_dma_txcb(void *data) return; /* Wait until the FIFO data completely. */ - wait_for_idle(rs); + wait_for_tx_idle(rs, ctlr->slave); spi_enable_chip(rs, false); spi_finalize_current_transfer(ctlr); @@ -545,7 +552,7 @@ static int rockchip_spi_config(struct rockchip_spi *rs, else writel_relaxed(rs->fifo_len / 2 - 1, rs->regs + ROCKCHIP_SPI_RXFTLR); - writel_relaxed(rs->fifo_len / 2, rs->regs + ROCKCHIP_SPI_DMATDLR); + writel_relaxed(rs->fifo_len / 2 - 1, rs->regs + ROCKCHIP_SPI_DMATDLR); writel_relaxed(rockchip_spi_calc_burst_size(xfer->len / rs->n_bytes) - 1, rs->regs + ROCKCHIP_SPI_DMARDLR); writel_relaxed(dmacr, rs->regs + ROCKCHIP_SPI_DMACR); From patchwork Mon Jun 7 10:59:45 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jon Lin X-Patchwork-Id: 12303167 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,USER_AGENT_GIT autolearn=unavailable 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 305ACC47082 for ; Mon, 7 Jun 2021 10:59:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 049BC610C8 for ; Mon, 7 Jun 2021 10:59:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230230AbhFGLBm (ORCPT ); Mon, 7 Jun 2021 07:01:42 -0400 Received: from lucky1.263xmail.com ([211.157.147.134]:47640 "EHLO lucky1.263xmail.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230131AbhFGLBl (ORCPT ); Mon, 7 Jun 2021 07:01:41 -0400 Received: from localhost (unknown [192.168.167.224]) by lucky1.263xmail.com (Postfix) with ESMTP id 716CCC876B; Mon, 7 Jun 2021 18:59:48 +0800 (CST) X-MAIL-GRAY: 0 X-MAIL-DELIVERY: 1 X-ADDR-CHECKED4: 1 X-SKE-CHECKED: 1 X-ANTISPAM-LEVEL: 2 Received: from localhost.localdomain (unknown [58.22.7.114]) by smtp.263.net (postfix) whith ESMTP id P15980T139899277661952S1623063587583133_; Mon, 07 Jun 2021 18:59:48 +0800 (CST) X-IP-DOMAINF: 1 X-UNIQUE-TAG: <00855f5e198fd5e1046fad2ab073a1dc> X-RL-SENDER: jon.lin@rock-chips.com X-SENDER: jon.lin@rock-chips.com X-LOGIN-NAME: jon.lin@rock-chips.com X-FST-TO: broonie@kernel.org X-RCPT-COUNT: 9 X-SENDER-IP: 58.22.7.114 X-ATTACHMENT-NUM: 0 X-System-Flag: 0 From: Jon Lin To: broonie@kernel.org Cc: jon.lin@rock-chips.com, heiko@sntech.de, robh+dt@kernel.org, linux-spi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org Subject: [PATCH v5 5/6] spi: rockchip: Support cs-gpio Date: Mon, 7 Jun 2021 18:59:45 +0800 Message-Id: <20210607105946.24266-1-jon.lin@rock-chips.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210607105802.23796-1-jon.lin@rock-chips.com> References: <20210607105802.23796-1-jon.lin@rock-chips.com> Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org 1.Add standard cs-gpio support 2.Refer to spi-controller.yaml for details Signed-off-by: Jon Lin --- Changes in v5: None Changes in v4: None Changes in v3: None drivers/spi/spi-rockchip.c | 61 ++++++++++++++++++++++++++++++++++---- 1 file changed, 56 insertions(+), 5 deletions(-) diff --git a/drivers/spi/spi-rockchip.c b/drivers/spi/spi-rockchip.c index 950d3bce443b..48b666d42d8a 100644 --- a/drivers/spi/spi-rockchip.c +++ b/drivers/spi/spi-rockchip.c @@ -6,6 +6,7 @@ #include #include +#include #include #include #include @@ -157,7 +158,8 @@ */ #define ROCKCHIP_SPI_MAX_TRANLEN 0xffff -#define ROCKCHIP_SPI_MAX_CS_NUM 2 +/* 2 for native cs, 2 for cs-gpio */ +#define ROCKCHIP_SPI_MAX_CS_NUM 4 #define ROCKCHIP_SPI_VER2_TYPE1 0x05EC0002 #define ROCKCHIP_SPI_VER2_TYPE2 0x00110002 @@ -191,6 +193,7 @@ struct rockchip_spi { bool cs_asserted[ROCKCHIP_SPI_MAX_CS_NUM]; bool slave_abort; + bool gpio_requested; }; static inline void spi_enable_chip(struct rockchip_spi *rs, bool enable) @@ -245,11 +248,15 @@ static void rockchip_spi_set_cs(struct spi_device *spi, bool enable) /* Keep things powered as long as CS is asserted */ pm_runtime_get_sync(rs->dev); - ROCKCHIP_SPI_SET_BITS(rs->regs + ROCKCHIP_SPI_SER, - BIT(spi->chip_select)); + if (gpio_is_valid(spi->cs_gpio)) + ROCKCHIP_SPI_SET_BITS(rs->regs + ROCKCHIP_SPI_SER, 1); + else + ROCKCHIP_SPI_SET_BITS(rs->regs + ROCKCHIP_SPI_SER, BIT(spi->chip_select)); } else { - ROCKCHIP_SPI_CLR_BITS(rs->regs + ROCKCHIP_SPI_SER, - BIT(spi->chip_select)); + if (gpio_is_valid(spi->cs_gpio)) + ROCKCHIP_SPI_CLR_BITS(rs->regs + ROCKCHIP_SPI_SER, 1); + else + ROCKCHIP_SPI_CLR_BITS(rs->regs + ROCKCHIP_SPI_SER, BIT(spi->chip_select)); /* Drop reference from when we first asserted CS */ pm_runtime_put(rs->dev); @@ -632,6 +639,47 @@ static bool rockchip_spi_can_dma(struct spi_controller *ctlr, return xfer->len / bytes_per_word >= rs->fifo_len; } +static int rockchip_spi_setup(struct spi_device *spi) +{ + + int ret = -EINVAL; + struct rockchip_spi *rs = spi_controller_get_devdata(spi->controller); + + if (spi->cs_gpio == -ENOENT) + return 0; + + if (!rs->gpio_requested && gpio_is_valid(spi->cs_gpio)) { + ret = gpio_request_one(spi->cs_gpio, + (spi->mode & SPI_CS_HIGH) ? + GPIOF_OUT_INIT_LOW : GPIOF_OUT_INIT_HIGH, + dev_name(&spi->dev)); + if (ret) + dev_err(&spi->dev, "can't request chipselect gpio %d\n", + spi->cs_gpio); + else + rs->gpio_requested = true; + } else { + if (gpio_is_valid(spi->cs_gpio)) { + int mode = ((spi->mode & SPI_CS_HIGH) ? 0 : 1); + + ret = gpio_direction_output(spi->cs_gpio, mode); + if (ret) + dev_err(&spi->dev, "chipselect gpio %d setup failed (%d)\n", + spi->cs_gpio, ret); + } + } + + return ret; +} + +static void rockchip_spi_cleanup(struct spi_device *spi) +{ + struct rockchip_spi *rs = spi_controller_get_devdata(spi->controller); + + if (rs->gpio_requested) + gpio_free(spi->cs_gpio); +} + static int rockchip_spi_probe(struct platform_device *pdev) { int ret; @@ -706,6 +754,7 @@ static int rockchip_spi_probe(struct platform_device *pdev) rs->dev = &pdev->dev; rs->freq = clk_get_rate(rs->spiclk); + rs->gpio_requested = false; if (!of_property_read_u32(pdev->dev.of_node, "rx-sample-delay-ns", &rsd_nsecs)) { @@ -759,6 +808,8 @@ static int rockchip_spi_probe(struct platform_device *pdev) ctlr->max_speed_hz = min(rs->freq / BAUDR_SCKDV_MIN, MAX_SCLK_OUT); ctlr->set_cs = rockchip_spi_set_cs; + ctlr->setup = rockchip_spi_setup; + ctlr->cleanup = rockchip_spi_cleanup; ctlr->transfer_one = rockchip_spi_transfer_one; ctlr->max_transfer_size = rockchip_spi_max_transfer_size; ctlr->handle_err = rockchip_spi_handle_err; From patchwork Mon Jun 7 10:59:46 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jon Lin X-Patchwork-Id: 12303169 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,USER_AGENT_GIT autolearn=unavailable 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 3A1A1C48BCF for ; Mon, 7 Jun 2021 10:59:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 24DFD61289 for ; Mon, 7 Jun 2021 10:59:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230450AbhFGLBn (ORCPT ); Mon, 7 Jun 2021 07:01:43 -0400 Received: from lucky1.263xmail.com ([211.157.147.131]:48060 "EHLO lucky1.263xmail.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230139AbhFGLBn (ORCPT ); Mon, 7 Jun 2021 07:01:43 -0400 Received: from localhost (unknown [192.168.167.224]) by lucky1.263xmail.com (Postfix) with ESMTP id B5197BA7E4; Mon, 7 Jun 2021 18:59:50 +0800 (CST) X-MAIL-GRAY: 0 X-MAIL-DELIVERY: 1 X-ADDR-CHECKED4: 1 X-SKE-CHECKED: 1 X-ANTISPAM-LEVEL: 2 Received: from localhost.localdomain (unknown [58.22.7.114]) by smtp.263.net (postfix) whith ESMTP id P15980T139899277661952S1623063587583133_; Mon, 07 Jun 2021 18:59:50 +0800 (CST) X-IP-DOMAINF: 1 X-UNIQUE-TAG: <4661d269662baee90cd4d89f83279709> X-RL-SENDER: jon.lin@rock-chips.com X-SENDER: jon.lin@rock-chips.com X-LOGIN-NAME: jon.lin@rock-chips.com X-FST-TO: broonie@kernel.org X-RCPT-COUNT: 9 X-SENDER-IP: 58.22.7.114 X-ATTACHMENT-NUM: 0 X-System-Flag: 0 From: Jon Lin To: broonie@kernel.org Cc: jon.lin@rock-chips.com, heiko@sntech.de, robh+dt@kernel.org, linux-spi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org Subject: [PATCH v5 6/6] spi: rockchip: Support SPI_CS_HIGH Date: Mon, 7 Jun 2021 18:59:46 +0800 Message-Id: <20210607105946.24266-2-jon.lin@rock-chips.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210607105946.24266-1-jon.lin@rock-chips.com> References: <20210607105802.23796-1-jon.lin@rock-chips.com> <20210607105946.24266-1-jon.lin@rock-chips.com> Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org 1.Add standard spi-cs-high support 2.Refer to spi-controller.yaml for details Signed-off-by: Jon Lin --- Changes in v5: None Changes in v4: None Changes in v3: None drivers/spi/spi-rockchip.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/spi/spi-rockchip.c b/drivers/spi/spi-rockchip.c index 48b666d42d8a..d64cca34eef7 100644 --- a/drivers/spi/spi-rockchip.c +++ b/drivers/spi/spi-rockchip.c @@ -108,6 +108,8 @@ #define CR0_OPM_MASTER 0x0 #define CR0_OPM_SLAVE 0x1 +#define CR0_SOI_OFFSET 23 + #define CR0_MTM_OFFSET 0x21 /* Bit fields in SER, 2bit */ @@ -238,7 +240,7 @@ static void rockchip_spi_set_cs(struct spi_device *spi, bool enable) { struct spi_controller *ctlr = spi->controller; struct rockchip_spi *rs = spi_controller_get_devdata(ctlr); - bool cs_asserted = !enable; + bool cs_asserted = spi->mode & SPI_CS_HIGH ? enable : !enable; /* Return immediately for no-op */ if (cs_asserted == rs->cs_asserted[spi->chip_select]) @@ -509,6 +511,8 @@ static int rockchip_spi_config(struct rockchip_spi *rs, cr0 |= (spi->mode & 0x3U) << CR0_SCPH_OFFSET; if (spi->mode & SPI_LSB_FIRST) cr0 |= CR0_FBM_LSB << CR0_FBM_OFFSET; + if (spi->mode & SPI_CS_HIGH) + cr0 |= BIT(spi->chip_select) << CR0_SOI_OFFSET; if (xfer->rx_buf && xfer->tx_buf) cr0 |= CR0_XFM_TR << CR0_XFM_OFFSET; @@ -787,7 +791,7 @@ static int rockchip_spi_probe(struct platform_device *pdev) ctlr->auto_runtime_pm = true; ctlr->bus_num = pdev->id; - ctlr->mode_bits = SPI_CPOL | SPI_CPHA | SPI_LOOP | SPI_LSB_FIRST; + ctlr->mode_bits = SPI_CPOL | SPI_CPHA | SPI_LOOP | SPI_LSB_FIRST | SPI_CS_HIGH; if (slave_mode) { ctlr->mode_bits |= SPI_NO_CS; ctlr->slave_abort = rockchip_spi_slave_abort;