dev_err(&pdev->dev, "Failed to get memory resource\n"); return -ENXIO; } // 步骤二:调用devm_platform_ioremap_resource函数 regs = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(regs)) { dev_err(&pdev->dev, "Failed to ioremap resource\n"); return PTR_ERR(regs); } // ...
devm_platform_ioremap_resource_byname(struct platform_device *pdev, const char *name); extern int platform_get_irq(struct platform_device *, unsigned int); platform_device_register、platform_device_unregister,Platform设备的注册/注销接口,和底层的device_register等接口类似。 arch_setup_pdev_archdata,设...
mem_CLK= platform_get_resource(pdev, IORESOURCE_MEM,15);//以下把获取到的寄存器地址转映射为虚拟地址led->MODER_A = devm_ioremap(&pdev->dev, mem_MODER_A->start, resource_size(mem_MODER_A)); led->OTYPER_A = devm_ioremap(&pdev->dev, mem_OTYPER_A->start, resource_size(mem_OTYPER_A...
devm_platform_ioremap_resource 释放 开发中,如果代码不规范很容易产生内存泄漏,比如Handler、Context、线程等使用。本文使用Android Studio自带的Profiler和MAT工具进行内存泄漏分析。 一、内存泄漏 1、定义handler private Handler mHandler = new Handler(new Handler.Callback() { @Override public boolean handleMessage...
Convert platform_get_resource(), devm_ioremap_resource() to a single call to devm_platform_get_and_ioremap_resource(), as this is exactly what this function does. Signed-off-by: Ye Xingchen <ye.xingchen@zte.com.cn> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-...
priv=devm_kzalloc(&pdev->dev,sizeof(structi2c_au1550_data), GFP_KERNEL); if(!priv) return-ENOMEM; r=platform_get_resource(pdev,IORESOURCE_MEM,0); priv->psc_base=devm_ioremap_resource(&pdev->dev,r); priv->psc_base=devm_platform_get_and_ioremap_resource(pdev,0,NULL); ...
res = platform_get_resource(pdev, IORESOURCE_MEM, 0); regs = devm_ioremap_resource(&pdev->dev, res); //映射,供用户使用,check, request region, and ioremap resource //Initialise managed register map,初始化管理的寄存器的映射 i2s->regmap = devm_regmap_init_mmio(&pdev->dev, regs,&rockchi...
resource是平台设备提供给驱动的资源。通常用一个数组来存放,上面的num_resource就是数组元素的个数。 那么这个resource到底是什么东西呢?在Linux里面用了几个宏来定义资源 在嵌入式中,基本上没有IO地址空间,所以通常使用IORESOURCE_MEM。代码中是这样定义的。
/ drivers / net / ethernet / stmicro / stmmac / stmmac_platform.c v6 v6.13 v6.12 v6.12.6 v6.12.5 v6.12.4 v6.12.3 v6.12.2 v6.12.1 v6.12 v6.12-rc7 v6.12-rc6 v6.12-rc5 v6.12-rc4 v6.12-rc3 v6.12-rc2 v6.12-rc1 ...
csi) return -ENOMEM; csi->dev = &pdev->dev; platform_set_drvdata(pdev, csi); res = platform_get_resource(pdev, IORESOURCE_MEM, 0); csi->shim = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(csi->shim)) return PTR_ERR(csi->shim); /* ...