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Mon, 06 Jan 2020 14:29:42 +0100 Received: from euls16034.sgp.st.com (euls16034.sgp.st.com [10.75.44.20]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id F0C20100038; Mon, 6 Jan 2020 14:29:41 +0100 (CET) Received: from Webmail-eu.st.com (sfhdag3node2.st.com [10.75.127.8]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id DFD752D378B; Mon, 6 Jan 2020 14:29:41 +0100 (CET) Received: from localhost (10.75.127.49) by SFHDAG3NODE2.st.com (10.75.127.8) with Microsoft SMTP Server (TLS) id 15.0.1347.2; Mon, 6 Jan 2020 14:29:41 +0100 From: Alain Volmat To: , Subject: [PATCH 1/6] ARM: dts: stm32: add i2c4 sleep pinctrl on stm32mp15xx-dkx Date: Mon, 6 Jan 2020 14:28:29 +0100 Message-ID: <1578317314-17197-2-git-send-email-alain.volmat@st.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1578317314-17197-1-git-send-email-alain.volmat@st.com> References: <1578317314-17197-1-git-send-email-alain.volmat@st.com> MIME-Version: 1.0 X-Originating-IP: [10.75.127.49] X-ClientProxiedBy: SFHDAG4NODE1.st.com (10.75.127.10) To SFHDAG3NODE2.st.com (10.75.127.8) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.95,18.0.572 definitions=2020-01-06_04:2020-01-06,2020-01-06 signatures=0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200106_052950_719263_9AF0A2C7 X-CRM114-Status: GOOD ( 14.40 ) X-Spam-Score: -0.9 (/) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (-0.9 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at https://www.dnswl.org/, low trust [62.209.51.94 listed in list.dnswl.org] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: mark.rutland@arm.com, devicetree@vger.kernel.org, alexandre.torgue@st.com, linux-kernel@vger.kernel.org, pierre-yves.mordret@st.com, linux-i2c@vger.kernel.org, mcoquelin.stm32@gmail.com, fabrice.gasnier@st.com, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Add the sleep state pinctrl entry for the i2c4 node of the stm32mp15xx-dkx.dtsi Signed-off-by: Alain Volmat --- arch/arm/boot/dts/stm32mp15xx-dkx.dtsi | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/arm/boot/dts/stm32mp15xx-dkx.dtsi b/arch/arm/boot/dts/stm32mp15xx-dkx.dtsi index f6672e87aef3..7f5fcb2c5b03 100644 --- a/arch/arm/boot/dts/stm32mp15xx-dkx.dtsi +++ b/arch/arm/boot/dts/stm32mp15xx-dkx.dtsi @@ -216,8 +216,9 @@ }; &i2c4 { - pinctrl-names = "default"; + pinctrl-names = "default", "sleep"; pinctrl-0 = <&i2c4_pins_a>; + pinctrl-1 = <&i2c4_pins_sleep_a>; i2c-scl-rising-time-ns = <185>; i2c-scl-falling-time-ns = <20>; status = "okay"; From patchwork Mon Jan 6 13:28:30 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alain Volmat X-Patchwork-Id: 11319261 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D228B138C for ; Mon, 6 Jan 2020 13:30:19 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id B007420731 for ; Mon, 6 Jan 2020 13:30:19 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="fdpum0kD"; 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Mon, 06 Jan 2020 14:29:42 +0100 Received: from euls16034.sgp.st.com (euls16034.sgp.st.com [10.75.44.20]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 6562610002A; Mon, 6 Jan 2020 14:29:42 +0100 (CET) Received: from Webmail-eu.st.com (sfhdag3node2.st.com [10.75.127.8]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id 571172D378B; Mon, 6 Jan 2020 14:29:42 +0100 (CET) Received: from localhost (10.75.127.48) by SFHDAG3NODE2.st.com (10.75.127.8) with Microsoft SMTP Server (TLS) id 15.0.1347.2; Mon, 6 Jan 2020 14:29:42 +0100 From: Alain Volmat To: , Subject: [PATCH 2/6] ARM: dts: stm32: add i2c2/i2c5 sleep pinctrl on stm32mp157c-ev1 Date: Mon, 6 Jan 2020 14:28:30 +0100 Message-ID: <1578317314-17197-3-git-send-email-alain.volmat@st.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1578317314-17197-1-git-send-email-alain.volmat@st.com> References: <1578317314-17197-1-git-send-email-alain.volmat@st.com> MIME-Version: 1.0 X-Originating-IP: [10.75.127.48] X-ClientProxiedBy: SFHDAG2NODE1.st.com (10.75.127.4) To SFHDAG3NODE2.st.com (10.75.127.8) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.95,18.0.572 definitions=2020-01-06_04:2020-01-06,2020-01-06 signatures=0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200106_052950_719337_4E5AA9FB X-CRM114-Status: GOOD ( 14.15 ) X-Spam-Score: -0.9 (/) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (-0.9 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at https://www.dnswl.org/, low trust [62.209.51.94 listed in list.dnswl.org] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: mark.rutland@arm.com, devicetree@vger.kernel.org, alexandre.torgue@st.com, linux-kernel@vger.kernel.org, pierre-yves.mordret@st.com, linux-i2c@vger.kernel.org, mcoquelin.stm32@gmail.com, fabrice.gasnier@st.com, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Add the sleep state pinctrl entry for the i2c2 and i2c5 nodes of the stm32mp157c-ev1 board. Signed-off-by: Alain Volmat --- arch/arm/boot/dts/stm32mp157c-ev1.dts | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/arch/arm/boot/dts/stm32mp157c-ev1.dts b/arch/arm/boot/dts/stm32mp157c-ev1.dts index 228e35e16884..d4bfb2adb0e4 100644 --- a/arch/arm/boot/dts/stm32mp157c-ev1.dts +++ b/arch/arm/boot/dts/stm32mp157c-ev1.dts @@ -174,8 +174,9 @@ }; &i2c2 { - pinctrl-names = "default"; + pinctrl-names = "default", "sleep"; pinctrl-0 = <&i2c2_pins_a>; + pinctrl-1 = <&i2c2_pins_sleep_a>; i2c-scl-rising-time-ns = <185>; i2c-scl-falling-time-ns = <20>; status = "okay"; @@ -227,8 +228,9 @@ }; &i2c5 { - pinctrl-names = "default"; + pinctrl-names = "default", "sleep"; pinctrl-0 = <&i2c5_pins_a>; + pinctrl-1 = <&i2c5_pins_sleep_a>; i2c-scl-rising-time-ns = <185>; i2c-scl-falling-time-ns = <20>; status = "okay"; From patchwork Mon Jan 6 13:28:31 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alain Volmat X-Patchwork-Id: 11319269 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 333491398 for ; 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Signed-off-by: Alain Volmat --- arch/arm/boot/dts/stm32mp157c-ed1.dts | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/arm/boot/dts/stm32mp157c-ed1.dts b/arch/arm/boot/dts/stm32mp157c-ed1.dts index 1fc43251d697..209dae010be4 100644 --- a/arch/arm/boot/dts/stm32mp157c-ed1.dts +++ b/arch/arm/boot/dts/stm32mp157c-ed1.dts @@ -130,8 +130,9 @@ }; &i2c4 { - pinctrl-names = "default"; + pinctrl-names = "default", "sleep"; pinctrl-0 = <&i2c4_pins_a>; + pinctrl-0 = <&i2c4_pins_sleep_a>; i2c-scl-rising-time-ns = <185>; i2c-scl-falling-time-ns = <20>; status = "okay"; From patchwork Mon Jan 6 13:28:32 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alain Volmat X-Patchwork-Id: 11319275 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id A87C0138C for ; Mon, 6 Jan 2020 13:31:21 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 73BE620731 for ; 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Mon, 6 Jan 2020 14:29:43 +0100 (CET) Received: from localhost (10.75.127.51) by SFHDAG3NODE2.st.com (10.75.127.8) with Microsoft SMTP Server (TLS) id 15.0.1347.2; Mon, 6 Jan 2020 14:29:43 +0100 From: Alain Volmat To: , Subject: [PATCH 4/6] i2c: i2c-stm32f7: add PM_SLEEP suspend/resume support Date: Mon, 6 Jan 2020 14:28:32 +0100 Message-ID: <1578317314-17197-5-git-send-email-alain.volmat@st.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1578317314-17197-1-git-send-email-alain.volmat@st.com> References: <1578317314-17197-1-git-send-email-alain.volmat@st.com> MIME-Version: 1.0 X-Originating-IP: [10.75.127.51] X-ClientProxiedBy: SFHDAG8NODE1.st.com (10.75.127.22) To SFHDAG3NODE2.st.com (10.75.127.8) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.95,18.0.572 definitions=2020-01-06_04:2020-01-06,2020-01-06 signatures=0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200106_052950_925027_20FAC993 X-CRM114-Status: GOOD ( 18.13 ) X-Spam-Score: -0.9 (/) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (-0.9 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at https://www.dnswl.org/, low trust [62.209.51.94 listed in list.dnswl.org] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: mark.rutland@arm.com, devicetree@vger.kernel.org, alexandre.torgue@st.com, linux-kernel@vger.kernel.org, pierre-yves.mordret@st.com, linux-i2c@vger.kernel.org, mcoquelin.stm32@gmail.com, fabrice.gasnier@st.com, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Backup/restore I2C registers as part of the suspend/resume handlers. The device is marked as suspended to ensure that transfers are rejected during the suspended period. Signed-off-by: Pierre-Yves MORDRET Signed-off-by: Alain Volmat Reviewed-by: Pierre-Yves MORDRET --- drivers/i2c/busses/i2c-stm32f7.c | 117 +++++++++++++++++++++++++++++++++++++-- 1 file changed, 113 insertions(+), 4 deletions(-) diff --git a/drivers/i2c/busses/i2c-stm32f7.c b/drivers/i2c/busses/i2c-stm32f7.c index b2634afe066d..5c3e8ac6ad92 100644 --- a/drivers/i2c/busses/i2c-stm32f7.c +++ b/drivers/i2c/busses/i2c-stm32f7.c @@ -169,6 +169,24 @@ #define STM32F7_AUTOSUSPEND_DELAY (HZ / 100) /** + * struct stm32f7_i2c_regs - i2c f7 registers backup + * @cr1: Control register 1 + * @cr2: Control register 2 + * @oar1: Own address 1 register + * @oar2: Own address 2 register + * @pecr: PEC register + * @tmgr: Timing register + */ +struct stm32f7_i2c_regs { + u32 cr1; + u32 cr2; + u32 oar1; + u32 oar2; + u32 pecr; + u32 tmgr; +}; + +/** * struct stm32f7_i2c_spec - private i2c specification timing * @rate: I2C bus speed (Hz) * @rate_min: 80% of I2C bus speed (Hz) @@ -276,6 +294,7 @@ struct stm32f7_i2c_msg { * @timing: I2C computed timings * @slave: list of slave devices registered on the I2C bus * @slave_running: slave device currently used + * @backup_regs: backup of i2c controller registers (for suspend/resume) * @slave_dir: transfer direction for the current slave device * @master_mode: boolean to know in which mode the I2C is running (master or * slave) @@ -298,6 +317,7 @@ struct stm32f7_i2c_dev { struct stm32f7_i2c_timings timing; struct i2c_client *slave[STM32F7_I2C_MAX_SLAVE]; struct i2c_client *slave_running; + struct stm32f7_i2c_regs backup_regs; u32 slave_dir; bool master_mode; struct stm32_i2c_dma *dma; @@ -2027,8 +2047,7 @@ static int stm32f7_i2c_remove(struct platform_device *pdev) return 0; } -#ifdef CONFIG_PM -static int stm32f7_i2c_runtime_suspend(struct device *dev) +static int __maybe_unused stm32f7_i2c_runtime_suspend(struct device *dev) { struct stm32f7_i2c_dev *i2c_dev = dev_get_drvdata(dev); @@ -2038,7 +2057,7 @@ static int stm32f7_i2c_runtime_suspend(struct device *dev) return 0; } -static int stm32f7_i2c_runtime_resume(struct device *dev) +static int __maybe_unused stm32f7_i2c_runtime_resume(struct device *dev) { struct stm32f7_i2c_dev *i2c_dev = dev_get_drvdata(dev); int ret; @@ -2053,11 +2072,101 @@ static int stm32f7_i2c_runtime_resume(struct device *dev) return 0; } -#endif + +static int __maybe_unused +stm32f7_i2c_regs_backup(struct stm32f7_i2c_dev *i2c_dev) +{ + int ret; + struct stm32f7_i2c_regs *backup_regs = &i2c_dev->backup_regs; + + ret = pm_runtime_get_sync(i2c_dev->dev); + if (ret < 0) + return ret; + + backup_regs->cr1 = readl_relaxed(i2c_dev->base + STM32F7_I2C_CR1); + backup_regs->cr2 = readl_relaxed(i2c_dev->base + STM32F7_I2C_CR2); + backup_regs->oar1 = readl_relaxed(i2c_dev->base + STM32F7_I2C_OAR1); + backup_regs->oar2 = readl_relaxed(i2c_dev->base + STM32F7_I2C_OAR2); + backup_regs->pecr = readl_relaxed(i2c_dev->base + STM32F7_I2C_PECR); + backup_regs->tmgr = readl_relaxed(i2c_dev->base + STM32F7_I2C_TIMINGR); + + pm_runtime_put_sync(i2c_dev->dev); + + return ret; +} + +static int __maybe_unused +stm32f7_i2c_regs_restore(struct stm32f7_i2c_dev *i2c_dev) +{ + u32 cr1; + int ret; + struct stm32f7_i2c_regs *backup_regs = &i2c_dev->backup_regs; + + ret = pm_runtime_get_sync(i2c_dev->dev); + if (ret < 0) + return ret; + + cr1 = readl_relaxed(i2c_dev->base + STM32F7_I2C_CR1); + if (cr1 & STM32F7_I2C_CR1_PE) + stm32f7_i2c_clr_bits(i2c_dev->base + STM32F7_I2C_CR1, + STM32F7_I2C_CR1_PE); + + writel_relaxed(backup_regs->tmgr, i2c_dev->base + STM32F7_I2C_TIMINGR); + writel_relaxed(backup_regs->cr1 & ~STM32F7_I2C_CR1_PE, + i2c_dev->base + STM32F7_I2C_CR1); + if (backup_regs->cr1 & STM32F7_I2C_CR1_PE) + stm32f7_i2c_set_bits(i2c_dev->base + STM32F7_I2C_CR1, + STM32F7_I2C_CR1_PE); + writel_relaxed(backup_regs->cr2, i2c_dev->base + STM32F7_I2C_CR2); + writel_relaxed(backup_regs->oar1, i2c_dev->base + STM32F7_I2C_OAR1); + writel_relaxed(backup_regs->oar2, i2c_dev->base + STM32F7_I2C_OAR2); + writel_relaxed(backup_regs->pecr, i2c_dev->base + STM32F7_I2C_PECR); + + pm_runtime_put_sync(i2c_dev->dev); + + return ret; +} + +static int __maybe_unused stm32f7_i2c_suspend(struct device *dev) +{ + struct stm32f7_i2c_dev *i2c_dev = dev_get_drvdata(dev); + int ret; + + i2c_mark_adapter_suspended(&i2c_dev->adap); + ret = stm32f7_i2c_regs_backup(i2c_dev); + if (ret < 0) { + i2c_mark_adapter_resumed(&i2c_dev->adap); + return ret; + } + + pinctrl_pm_select_sleep_state(dev); + pm_runtime_force_suspend(dev); + + return 0; +} + +static int __maybe_unused stm32f7_i2c_resume(struct device *dev) +{ + struct stm32f7_i2c_dev *i2c_dev = dev_get_drvdata(dev); + int ret; + + ret = pm_runtime_force_resume(dev); + if (ret < 0) + return ret; + pinctrl_pm_select_default_state(dev); + + ret = stm32f7_i2c_regs_restore(i2c_dev); + if (ret < 0) + return ret; + i2c_mark_adapter_resumed(&i2c_dev->adap); + + return 0; +} static const struct dev_pm_ops stm32f7_i2c_pm_ops = { SET_RUNTIME_PM_OPS(stm32f7_i2c_runtime_suspend, stm32f7_i2c_runtime_resume, NULL) + SET_SYSTEM_SLEEP_PM_OPS(stm32f7_i2c_suspend, stm32f7_i2c_resume) }; static const struct of_device_id stm32f7_i2c_match[] = { From patchwork Mon Jan 6 13:28:33 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alain Volmat X-Patchwork-Id: 11319279 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 715651398 for ; Mon, 6 Jan 2020 13:31:37 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 4EE4220731 for ; 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Mon, 6 Jan 2020 14:29:43 +0100 (CET) Received: from localhost (10.75.127.50) by SFHDAG3NODE2.st.com (10.75.127.8) with Microsoft SMTP Server (TLS) id 15.0.1347.2; Mon, 6 Jan 2020 14:29:43 +0100 From: Alain Volmat To: , Subject: [PATCH 5/6] i2c: i2c-stm32f7: allow controller to be wakeup-source Date: Mon, 6 Jan 2020 14:28:33 +0100 Message-ID: <1578317314-17197-6-git-send-email-alain.volmat@st.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1578317314-17197-1-git-send-email-alain.volmat@st.com> References: <1578317314-17197-1-git-send-email-alain.volmat@st.com> MIME-Version: 1.0 X-Originating-IP: [10.75.127.50] X-ClientProxiedBy: SFHDAG4NODE3.st.com (10.75.127.12) To SFHDAG3NODE2.st.com (10.75.127.8) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.95,18.0.572 definitions=2020-01-06_04:2020-01-06,2020-01-06 signatures=0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200106_052951_442574_A376D1DF X-CRM114-Status: GOOD ( 21.07 ) X-Spam-Score: -0.9 (/) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (-0.9 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at https://www.dnswl.org/, low trust [62.209.51.94 listed in list.dnswl.org] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: mark.rutland@arm.com, devicetree@vger.kernel.org, alexandre.torgue@st.com, linux-kernel@vger.kernel.org, pierre-yves.mordret@st.com, linux-i2c@vger.kernel.org, mcoquelin.stm32@gmail.com, fabrice.gasnier@st.com, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Allow the i2c-stm32f7 controller to become a wakeup-source of the system. In such case, when a slave is registered to the I2C controller, receiving a I2C message targeting that registered slave address wakes up the suspended system. In order to be able to wake-up, the I2C controller DT node must have the property wakeup-source defined and a slave must be registered. Signed-off-by: Alain Volmat Reviewed-by: Pierre-Yves MORDRET --- drivers/i2c/busses/i2c-stm32f7.c | 98 ++++++++++++++++++++++++++++++++++------ 1 file changed, 83 insertions(+), 15 deletions(-) diff --git a/drivers/i2c/busses/i2c-stm32f7.c b/drivers/i2c/busses/i2c-stm32f7.c index 5c3e8ac6ad92..844a22d64aa8 100644 --- a/drivers/i2c/busses/i2c-stm32f7.c +++ b/drivers/i2c/busses/i2c-stm32f7.c @@ -29,6 +29,7 @@ #include #include #include +#include #include #include #include @@ -49,6 +50,7 @@ /* STM32F7 I2C control 1 */ #define STM32F7_I2C_CR1_PECEN BIT(23) +#define STM32F7_I2C_CR1_WUPEN BIT(18) #define STM32F7_I2C_CR1_SBC BIT(16) #define STM32F7_I2C_CR1_RXDMAEN BIT(15) #define STM32F7_I2C_CR1_TXDMAEN BIT(14) @@ -301,6 +303,7 @@ struct stm32f7_i2c_msg { * @dma: dma data * @use_dma: boolean to know if dma is used in the current transfer * @regmap: holds SYSCFG phandle for Fast Mode Plus bits + * @wakeup_src: boolean to know if the device is a wakeup source */ struct stm32f7_i2c_dev { struct i2c_adapter adap; @@ -323,6 +326,7 @@ struct stm32f7_i2c_dev { struct stm32_i2c_dma *dma; bool use_dma; struct regmap *regmap; + bool wakeup_src; }; /* @@ -1691,6 +1695,9 @@ static int stm32f7_i2c_smbus_xfer(struct i2c_adapter *adapter, u16 addr, return ret; } +static void stm32f7_i2c_enable_wakeup(struct stm32f7_i2c_dev *i2c_dev, + bool enable); + static int stm32f7_i2c_reg_slave(struct i2c_client *slave) { struct stm32f7_i2c_dev *i2c_dev = i2c_get_adapdata(slave->adapter); @@ -1717,6 +1724,9 @@ static int stm32f7_i2c_reg_slave(struct i2c_client *slave) if (ret < 0) return ret; + if (!stm32f7_i2c_is_slave_registered(i2c_dev)) + stm32f7_i2c_enable_wakeup(i2c_dev, true); + if (id == 0) { /* Configure Own Address 1 */ oar1 = readl_relaxed(i2c_dev->base + STM32F7_I2C_OAR1); @@ -1758,6 +1768,9 @@ static int stm32f7_i2c_reg_slave(struct i2c_client *slave) ret = 0; pm_free: + if (!stm32f7_i2c_is_slave_registered(i2c_dev)) + stm32f7_i2c_enable_wakeup(i2c_dev, false); + pm_runtime_mark_last_busy(dev); pm_runtime_put_autosuspend(dev); @@ -1791,8 +1804,10 @@ static int stm32f7_i2c_unreg_slave(struct i2c_client *slave) i2c_dev->slave[id] = NULL; - if (!(stm32f7_i2c_is_slave_registered(i2c_dev))) + if (!stm32f7_i2c_is_slave_registered(i2c_dev)) { stm32f7_i2c_disable_irq(i2c_dev, STM32F7_I2C_ALL_IRQ_MASK); + stm32f7_i2c_enable_wakeup(i2c_dev, false); + } pm_runtime_mark_last_busy(i2c_dev->dev); pm_runtime_put_autosuspend(i2c_dev->dev); @@ -1879,6 +1894,9 @@ static int stm32f7_i2c_probe(struct platform_device *pdev) return irq_error ? : -ENOENT; } + i2c_dev->wakeup_src = of_property_read_bool(pdev->dev.of_node, + "wakeup-source"); + i2c_dev->clk = devm_clk_get(&pdev->dev, NULL); if (IS_ERR(i2c_dev->clk)) { dev_err(&pdev->dev, "Error: Missing controller clock\n"); @@ -1985,6 +2003,16 @@ static int stm32f7_i2c_probe(struct platform_device *pdev) goto clk_free; } + if (i2c_dev->wakeup_src) { + device_set_wakeup_capable(i2c_dev->dev, true); + + ret = dev_pm_set_wake_irq(i2c_dev->dev, irq_event); + if (ret) { + dev_err(i2c_dev->dev, "Failed to set wake up irq\n"); + goto clr_wakeup_capable; + } + } + platform_set_drvdata(pdev, i2c_dev); pm_runtime_set_autosuspend_delay(i2c_dev->dev, @@ -2014,6 +2042,13 @@ static int stm32f7_i2c_probe(struct platform_device *pdev) pm_runtime_set_suspended(i2c_dev->dev); pm_runtime_dont_use_autosuspend(i2c_dev->dev); + if (i2c_dev->wakeup_src) + dev_pm_clear_wake_irq(i2c_dev->dev); + +clr_wakeup_capable: + if (i2c_dev->wakeup_src) + device_set_wakeup_capable(i2c_dev->dev, false); + if (i2c_dev->dma) { stm32_i2c_dma_free(i2c_dev->dma); i2c_dev->dma = NULL; @@ -2032,6 +2067,15 @@ static int stm32f7_i2c_remove(struct platform_device *pdev) i2c_del_adapter(&i2c_dev->adap); pm_runtime_get_sync(i2c_dev->dev); + if (i2c_dev->wakeup_src) { + dev_pm_clear_wake_irq(i2c_dev->dev); + /* + * enforce that wakeup is disabled and that the device + * is marked as non wakeup capable + */ + device_init_wakeup(i2c_dev->dev, false); + } + pm_runtime_put_noidle(i2c_dev->dev); pm_runtime_disable(i2c_dev->dev); pm_runtime_set_suspended(i2c_dev->dev); @@ -2127,20 +2171,41 @@ stm32f7_i2c_regs_restore(struct stm32f7_i2c_dev *i2c_dev) return ret; } +static void stm32f7_i2c_enable_wakeup(struct stm32f7_i2c_dev *i2c_dev, + bool enable) +{ + void __iomem *base = i2c_dev->base; + u32 mask = STM32F7_I2C_CR1_WUPEN; + + if (!i2c_dev->wakeup_src) + return; + + if (enable) { + device_set_wakeup_enable(i2c_dev->dev, true); + stm32f7_i2c_set_bits(base + STM32F7_I2C_CR1, mask); + } else { + device_set_wakeup_enable(i2c_dev->dev, false); + stm32f7_i2c_clr_bits(base + STM32F7_I2C_CR1, mask); + } +} + static int __maybe_unused stm32f7_i2c_suspend(struct device *dev) { struct stm32f7_i2c_dev *i2c_dev = dev_get_drvdata(dev); int ret; i2c_mark_adapter_suspended(&i2c_dev->adap); - ret = stm32f7_i2c_regs_backup(i2c_dev); - if (ret < 0) { - i2c_mark_adapter_resumed(&i2c_dev->adap); - return ret; - } - pinctrl_pm_select_sleep_state(dev); - pm_runtime_force_suspend(dev); + if (!device_may_wakeup(dev) && !dev->power.wakeup_path) { + ret = stm32f7_i2c_regs_backup(i2c_dev); + if (ret < 0) { + i2c_mark_adapter_resumed(&i2c_dev->adap); + return ret; + } + + pinctrl_pm_select_sleep_state(dev); + pm_runtime_force_suspend(dev); + } return 0; } @@ -2150,14 +2215,17 @@ static int __maybe_unused stm32f7_i2c_resume(struct device *dev) struct stm32f7_i2c_dev *i2c_dev = dev_get_drvdata(dev); int ret; - ret = pm_runtime_force_resume(dev); - if (ret < 0) - return ret; - pinctrl_pm_select_default_state(dev); + if (!device_may_wakeup(dev) && !dev->power.wakeup_path) { + ret = pm_runtime_force_resume(dev); + if (ret < 0) + return ret; + pinctrl_pm_select_default_state(dev); + + ret = stm32f7_i2c_regs_restore(i2c_dev); + if (ret < 0) + return ret; + } - ret = stm32f7_i2c_regs_restore(i2c_dev); - if (ret < 0) - return ret; i2c_mark_adapter_resumed(&i2c_dev->adap); return 0; From patchwork Mon Jan 6 13:28:34 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alain Volmat X-Patchwork-Id: 11319271 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 4BBDA1398 for ; 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Mon, 6 Jan 2020 14:29:44 +0100 (CET) Received: from localhost (10.75.127.51) by SFHDAG3NODE2.st.com (10.75.127.8) with Microsoft SMTP Server (TLS) id 15.0.1347.2; Mon, 6 Jan 2020 14:29:43 +0100 From: Alain Volmat To: , Subject: [PATCH 6/6] ARM: dts: stm32: add wakeup-source in all I2C nodes of stm32mp157c Date: Mon, 6 Jan 2020 14:28:34 +0100 Message-ID: <1578317314-17197-7-git-send-email-alain.volmat@st.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1578317314-17197-1-git-send-email-alain.volmat@st.com> References: <1578317314-17197-1-git-send-email-alain.volmat@st.com> MIME-Version: 1.0 X-Originating-IP: [10.75.127.51] X-ClientProxiedBy: SFHDAG4NODE1.st.com (10.75.127.10) To SFHDAG3NODE2.st.com (10.75.127.8) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.95,18.0.572 definitions=2020-01-06_04:2020-01-06,2020-01-06 signatures=0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200106_052952_049862_1C7B7D91 X-CRM114-Status: GOOD ( 11.81 ) X-Spam-Score: -0.9 (/) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (-0.9 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at https://www.dnswl.org/, low trust [62.209.51.94 listed in list.dnswl.org] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: mark.rutland@arm.com, devicetree@vger.kernel.org, alexandre.torgue@st.com, linux-kernel@vger.kernel.org, pierre-yves.mordret@st.com, linux-i2c@vger.kernel.org, mcoquelin.stm32@gmail.com, fabrice.gasnier@st.com, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Add the wakeup-source property in all i2c nodes of the SoC stm32mp157c so that those I2C controllers can become wakeup-source. Signed-off-by: Alain Volmat --- arch/arm/boot/dts/stm32mp151.dtsi | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/arm/boot/dts/stm32mp151.dtsi b/arch/arm/boot/dts/stm32mp151.dtsi index 3dd570b10181..5706c4f41b0b 100644 --- a/arch/arm/boot/dts/stm32mp151.dtsi +++ b/arch/arm/boot/dts/stm32mp151.dtsi @@ -483,6 +483,7 @@ resets = <&rcc I2C1_R>; #address-cells = <1>; #size-cells = <0>; + wakeup-source; status = "disabled"; }; @@ -496,6 +497,7 @@ resets = <&rcc I2C2_R>; #address-cells = <1>; #size-cells = <0>; + wakeup-source; status = "disabled"; }; @@ -509,6 +511,7 @@ resets = <&rcc I2C3_R>; #address-cells = <1>; #size-cells = <0>; + wakeup-source; status = "disabled"; }; @@ -522,6 +525,7 @@ resets = <&rcc I2C5_R>; #address-cells = <1>; #size-cells = <0>; + wakeup-source; status = "disabled"; }; @@ -1473,6 +1477,7 @@ resets = <&rcc I2C4_R>; #address-cells = <1>; #size-cells = <0>; + wakeup-source; status = "disabled"; }; @@ -1508,6 +1513,7 @@ resets = <&rcc I2C6_R>; #address-cells = <1>; #size-cells = <0>; + wakeup-source; status = "disabled"; };