From: Amelie Delaunay <amelie.delaunay@st.com> To: Vinod Koul <vkoul@kernel.org>, Dan Williams <dan.j.williams@intel.com>, Maxime Coquelin <mcoquelin.stm32@gmail.com>, Alexandre Torgue <alexandre.torgue@st.com> Cc: <dmaengine@vger.kernel.org>, <linux-stm32@st-md-mailman.stormreply.com>, <linux-arm-kernel@lists.infradead.org>, <linux-kernel@vger.kernel.org>, Amelie Delaunay <amelie.delaunay@st.com>, Pierre-Yves MORDRET <pierre-yves.mordret@st.com> Subject: [PATCH 1/8] dmaengine: stm32-dma: add suspend/resume power management support Date: Wed, 29 Jan 2020 16:36:21 +0100 [thread overview] Message-ID: <20200129153628.29329-2-amelie.delaunay@st.com> (raw) In-Reply-To: <20200129153628.29329-1-amelie.delaunay@st.com> From: Pierre-Yves MORDRET <pierre-yves.mordret@st.com> Add suspend/resume power management relying on PM Runtime engine. Signed-off-by: Pierre-Yves MORDRET <pierre-yves.mordret@st.com> Signed-off-by: Amelie Delaunay <amelie.delaunay@st.com> --- drivers/dma/stm32-dma.c | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) diff --git a/drivers/dma/stm32-dma.c b/drivers/dma/stm32-dma.c index 5989b0893521..136deabd1aa3 100644 --- a/drivers/dma/stm32-dma.c +++ b/drivers/dma/stm32-dma.c @@ -1427,7 +1427,39 @@ static int stm32_dma_runtime_resume(struct device *dev) } #endif +#ifdef CONFIG_PM_SLEEP +static int stm32_dma_suspend(struct device *dev) +{ + struct stm32_dma_device *dmadev = dev_get_drvdata(dev); + int id, ret, scr; + + ret = pm_runtime_get_sync(dev); + if (ret < 0) + return ret; + + for (id = 0; id < STM32_DMA_MAX_CHANNELS; id++) { + scr = stm32_dma_read(dmadev, STM32_DMA_SCR(id)); + if (scr & STM32_DMA_SCR_EN) { + dev_warn(dev, "Suspend is prevented by Chan %i\n", id); + return -EBUSY; + } + } + + pm_runtime_put_sync(dev); + + pm_runtime_force_suspend(dev); + + return 0; +} + +static int stm32_dma_resume(struct device *dev) +{ + return pm_runtime_force_resume(dev); +} +#endif + static const struct dev_pm_ops stm32_dma_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(stm32_dma_suspend, stm32_dma_resume) SET_RUNTIME_PM_OPS(stm32_dma_runtime_suspend, stm32_dma_runtime_resume, NULL) }; -- 2.17.1
WARNING: multiple messages have this Message-ID (diff)
From: Amelie Delaunay <amelie.delaunay@st.com> To: Vinod Koul <vkoul@kernel.org>, Dan Williams <dan.j.williams@intel.com>, Maxime Coquelin <mcoquelin.stm32@gmail.com>, Alexandre Torgue <alexandre.torgue@st.com> Cc: Amelie Delaunay <amelie.delaunay@st.com>, linux-kernel@vger.kernel.org, Pierre-Yves MORDRET <pierre-yves.mordret@st.com>, dmaengine@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org Subject: [PATCH 1/8] dmaengine: stm32-dma: add suspend/resume power management support Date: Wed, 29 Jan 2020 16:36:21 +0100 [thread overview] Message-ID: <20200129153628.29329-2-amelie.delaunay@st.com> (raw) In-Reply-To: <20200129153628.29329-1-amelie.delaunay@st.com> From: Pierre-Yves MORDRET <pierre-yves.mordret@st.com> Add suspend/resume power management relying on PM Runtime engine. Signed-off-by: Pierre-Yves MORDRET <pierre-yves.mordret@st.com> Signed-off-by: Amelie Delaunay <amelie.delaunay@st.com> --- drivers/dma/stm32-dma.c | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) diff --git a/drivers/dma/stm32-dma.c b/drivers/dma/stm32-dma.c index 5989b0893521..136deabd1aa3 100644 --- a/drivers/dma/stm32-dma.c +++ b/drivers/dma/stm32-dma.c @@ -1427,7 +1427,39 @@ static int stm32_dma_runtime_resume(struct device *dev) } #endif +#ifdef CONFIG_PM_SLEEP +static int stm32_dma_suspend(struct device *dev) +{ + struct stm32_dma_device *dmadev = dev_get_drvdata(dev); + int id, ret, scr; + + ret = pm_runtime_get_sync(dev); + if (ret < 0) + return ret; + + for (id = 0; id < STM32_DMA_MAX_CHANNELS; id++) { + scr = stm32_dma_read(dmadev, STM32_DMA_SCR(id)); + if (scr & STM32_DMA_SCR_EN) { + dev_warn(dev, "Suspend is prevented by Chan %i\n", id); + return -EBUSY; + } + } + + pm_runtime_put_sync(dev); + + pm_runtime_force_suspend(dev); + + return 0; +} + +static int stm32_dma_resume(struct device *dev) +{ + return pm_runtime_force_resume(dev); +} +#endif + static const struct dev_pm_ops stm32_dma_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(stm32_dma_suspend, stm32_dma_resume) SET_RUNTIME_PM_OPS(stm32_dma_runtime_suspend, stm32_dma_runtime_resume, NULL) }; -- 2.17.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2020-01-29 15:37 UTC|newest] Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-01-29 15:36 [PATCH 0/8] STM32 DMA driver fixes and improvements Amelie Delaunay 2020-01-29 15:36 ` Amelie Delaunay 2020-01-29 15:36 ` Amelie Delaunay [this message] 2020-01-29 15:36 ` [PATCH 1/8] dmaengine: stm32-dma: add suspend/resume power management support Amelie Delaunay 2020-01-29 15:36 ` [PATCH 2/8] dmaengine: stm32-dma: use reset controller only at probe time Amelie Delaunay 2020-01-29 15:36 ` Amelie Delaunay 2020-01-29 15:36 ` [PATCH 3/8] dmaengine: stm32-dma: driver defers probe for reset Amelie Delaunay 2020-01-29 15:36 ` Amelie Delaunay 2020-01-29 15:36 ` [PATCH 4/8] dmaengine: stm32-dma: enable descriptor_reuse Amelie Delaunay 2020-01-29 15:36 ` Amelie Delaunay 2020-01-29 15:36 ` [PATCH 5/8] dmaengine: stm32-dma: use dma_set_max_seg_size to set the sg limit Amelie Delaunay 2020-01-29 15:36 ` Amelie Delaunay 2020-01-29 15:36 ` [PATCH 6/8] dmaengine: stm32-dma: add copy_align constraint Amelie Delaunay 2020-01-29 15:36 ` Amelie Delaunay 2020-01-29 15:36 ` [PATCH 7/8] dmaengine: stm32-dma: fix sleeping function called from invalid context Amelie Delaunay 2020-01-29 15:36 ` Amelie Delaunay 2020-01-29 15:36 ` [PATCH 8/8] dmaengine: stm32-dma: use vchan_terminate_vdesc() in .terminate_all Amelie Delaunay 2020-01-29 15:36 ` Amelie Delaunay 2020-02-25 5:45 ` [PATCH 0/8] STM32 DMA driver fixes and improvements Vinod Koul 2020-02-25 5:45 ` Vinod Koul
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=20200129153628.29329-2-amelie.delaunay@st.com \ --to=amelie.delaunay@st.com \ --cc=alexandre.torgue@st.com \ --cc=dan.j.williams@intel.com \ --cc=dmaengine@vger.kernel.org \ --cc=linux-arm-kernel@lists.infradead.org \ --cc=linux-kernel@vger.kernel.org \ --cc=linux-stm32@st-md-mailman.stormreply.com \ --cc=mcoquelin.stm32@gmail.com \ --cc=pierre-yves.mordret@st.com \ --cc=vkoul@kernel.org \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes, see mirroring instructions on how to clone and mirror all data and code used by this external index.