From: Vinod Koul <vinod.koul@intel.com>
To: Pierre-Yves MORDRET <pierre-yves.mordret@st.com>
Cc: Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Maxime Coquelin <mcoquelin.stm32@gmail.com>,
Alexandre Torgue <alexandre.torgue@st.com>,
Russell King <linux@armlinux.org.uk>,
Dan Williams <dan.j.williams@intel.com>,
"M'boumba Cedric Madianga" <cedric.madianga@gmail.com>,
Fabrice GASNIER <fabrice.gasnier@st.com>,
Herbert Xu <herbert@gondor.apana.org.au>,
Fabien DESSENNE <fabien.dessenne@st.com>,
Amelie Delaunay <amelie.delaunay@st.com>,
dmaengine@vger.kernel.org, devicetree@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3 2/5] dmaengine: Add STM32 DMAMUX driver
Date: Sat, 22 Jul 2017 12:21:33 +0530 [thread overview]
Message-ID: <20170722065133.GT3053@localhost> (raw)
In-Reply-To: <1499343623-5964-3-git-send-email-pierre-yves.mordret@st.com>
On Thu, Jul 06, 2017 at 02:20:20PM +0200, Pierre-Yves MORDRET wrote:
> +static int stm32_dmamux_probe(struct platform_device *pdev)
> +{
> + struct device_node *node = pdev->dev.of_node;
> + struct device_node *dma_node;
> + struct stm32_dmamux_data *stm32_dmamux;
> + struct resource *res;
> + void __iomem *iomem;
> + int i, ret;
> +
> + if (!node)
> + return -ENODEV;
> +
> + stm32_dmamux = devm_kzalloc(&pdev->dev, sizeof(*stm32_dmamux),
> + GFP_KERNEL);
> + if (!stm32_dmamux)
> + return -ENOMEM;
> +
> + dma_node = of_parse_phandle(node, "dma-masters", 0);
> + if (!dma_node) {
> + dev_err(&pdev->dev, "Can't get DMA master node\n");
> + return -ENODEV;
> + }
> +
> + if (device_property_read_u32(&pdev->dev, "dma-channels",
> + &stm32_dmamux->dmamux_channels))
> + stm32_dmamux->dmamux_channels = STM32_DMAMUX_MAX_CHANNELS;
> +
> + if (device_property_read_u32(&pdev->dev, "dma-requests",
> + &stm32_dmamux->dmamux_requests))
> + stm32_dmamux->dmamux_requests = STM32_DMAMUX_MAX_REQUESTS;
I think defaults should be warned here too
> +
> + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> + if (!res)
> + return -ENODEV;
> +
> + iomem = devm_ioremap_resource(&pdev->dev, res);
> + if (!iomem)
> + return -ENOMEM;
> +
> + spin_lock_init(&stm32_dmamux->lock);
> +
> + stm32_dmamux->clk = devm_clk_get(&pdev->dev, NULL);
> + if (IS_ERR(stm32_dmamux->clk)) {
> + dev_info(&pdev->dev, "Missing controller clock\n");
Can you check for EPROBE_DEFER and print only for if that is not the error
otherwise we end up sapmming with defered probe issues
> +
> +#ifndef __DMA_STM32_DMAMUX_H
> +#define __DMA_STM32_DMAMUX_H
> +
> +#if defined(CONFIG_STM32_DMAMUX)
> +int stm32_dmamux_set_config(struct device *dev, void *route_data, u32 chan_id);
Why do we need a custom API in this case?
--
~Vinod
next prev parent reply other threads:[~2017-07-22 6:48 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-06 12:20 [PATCH v3 0/5] Add STM32 DMAMUX support Pierre-Yves MORDRET
2017-07-06 12:20 ` [PATCH v3 1/5] dt-bindings: Document the STM32 DMAMUX bindings Pierre-Yves MORDRET
2017-07-10 3:56 ` Rob Herring
2017-07-06 12:20 ` [PATCH v3 2/5] dmaengine: Add STM32 DMAMUX driver Pierre-Yves MORDRET
2017-07-22 6:51 ` Vinod Koul [this message]
2017-07-24 13:55 ` Pierre Yves MORDRET
2017-07-26 5:29 ` Vinod Koul
2017-07-26 7:38 ` Pierre Yves MORDRET
2017-07-31 12:31 ` Vinod Koul
2017-08-01 9:32 ` Pierre Yves MORDRET
2017-08-02 4:55 ` Vinod Koul
2017-08-02 9:19 ` Peter Ujfalusi
2017-08-02 13:11 ` Pierre Yves MORDRET
2017-08-02 14:09 ` Peter Ujfalusi
2017-08-02 14:28 ` Pierre Yves MORDRET
2017-08-03 6:42 ` Peter Ujfalusi
2017-08-03 9:00 ` Pierre Yves MORDRET
2017-08-03 9:48 ` Peter Ujfalusi
2017-08-04 12:50 ` Pierre Yves MORDRET
2017-08-04 14:21 ` Peter Ujfalusi
2017-08-21 9:34 ` Pierre Yves MORDRET
2017-08-24 5:47 ` Peter Ujfalusi
2017-08-24 13:03 ` Pierre Yves MORDRET
2017-08-28 11:48 ` Peter Ujfalusi
2017-08-30 8:02 ` Pierre Yves MORDRET
2017-07-06 12:20 ` [PATCH v3 3/5] dt-bindings: stm32-dma: Add property to handle STM32 DMAMUX Pierre-Yves MORDRET
2017-07-10 3:57 ` Rob Herring
2017-07-06 12:20 ` [PATCH v3 4/5] dmaengine: stm32-dma: Add support for " Pierre-Yves MORDRET
2017-07-06 12:20 ` [PATCH v3 5/5] ARM: configs: stm32: Add DMAMUX support in STM32 defconfig Pierre-Yves MORDRET
2017-07-20 9:42 ` [PATCH v3 0/5] Add STM32 DMAMUX support Pierre Yves MORDRET
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