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
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