3.10版本开始出现了regmap的接口,这个regmap将i2c、spi、mmio、irq都抽象出统一的接口regmap_read、regmap_write、regmap_update_bits等接口 例如对于i2c接口 devm_regmap_init_i2c(i2c, ®map_i2c);或者使用 devm_regmap_init(&i2c->dev, ®map_i2c, &i2c->dev, config) | regmap_init(struct device *dev...
3.10版本开始出现了regmap的接口,这个regmap将i2c、spi、mmio、irq都抽象出统一的接口regmap_read、regmap_write、regmap_update_bits等接口 例如对于i2c接口 devm_regmap_init_i2c(i2c, ®map_i2c);或者使用 devm_regmap_init(&i2c->dev, ®map_i2c, &i2c->dev, config) | regmap_init(struct device *dev...
对Linux的devm_regmap_init_mmio的理解 、、、 我想知道,如何使用devm_regmap_init_mmio()导出16个字节的重新映射(跨越两个子区域)。例如,Linux中的一个驱动程序: if (IS_ERR(regs)apb->dev, "Couldn't map APB EHB registers\n"); } apb->reg 浏览26提问于2022-04-22得票数 0 1回答 如何修复phy驱...
devm_regmap_init may return error which caused by like out of memory, this will results in null pointer dereference later when reading or writing register: general protection fault in encx24j600_spi_probe KASAN: null-ptr-deref in range [0x0000000000000090-0x0000000000000097] CPU: 0 PID: 286 Co...
Kernel Regmap Regmap是什么东西?Regmap就是对i2c/spi/spmi等总线的一层封装,同时利用了缓存及压缩技术, 以期达到操作总线更简单、操作效率更高的目标。(个人认为对IO性能优化有限)一、关于...regmap_update_bits() ,regmap_write_bits()接口很方便对按位操作寄存器。Regmap操作i2c例子:Regmap总结: 使用确实更简单...
dev_err(&spi->dev,"Unable to get Vdd regulator: %d\n", ret);returnret; } ak4104->regmap = devm_regmap_init_spi(spi, &ak4104_regmap);if(IS_ERR(ak4104->regmap)) { ret = PTR_ERR(ak4104->regmap);returnret; }if(np) {enumof_gpio_flags flags;intgpio = of_get_named_gpio_flags...
spi_setup(spi); ad9852_init(st);return0; } 开发者ID:7799,项目名称:linux,代码行数:29,代码来源:ad9852.c 示例2: st_accel_i2c_probe ▲点赞 6▼ staticintst_accel_i2c_probe(struct i2c_client *client){structiio_dev*indio_dev;structst_sensor_data*adata;constchar*match;intret; ...
3.10版本开始出现了regmap的接口,这个regmap将i2c、spi、mmio、irq都抽象出统一的接口regmap_read、regmap_write、regmap_update_bits等接口 例如对于i2c接口 devm_regmap_init_i2c(i2c, ®map_i2c);或者使用 devm_regmap_init(&i2c->dev, ®map_i2c, &i2c->dev, config) ...
rtc->regmap = dev_get_regmap(dev->parent,NULL);if(!rtc->regmap)return-ENODEV; platform_set_drvdata(pdev, rtc); rtc->rtc_dev =devm_rtc_device_register(dev,"cpcap_rtc", &cpcap_rtc_ops, THIS_MODULE);if(IS_ERR(rtc->rtc_dev))returnPTR_ERR(rtc->rtc_dev); ...
*/intispv1_io_hw_init(struct platform_device *pdev){intret =0; print_debug("enter %s, pdev[%p]", __func__, pdev); ispv1_io_set_default(); ispv1_io.pdev = pdev;/* pinctrl enable */ispv1_io.isp_pinctrl =devm_pinctrl_get(&pdev->dev);if(IS_ERR(ispv1_io.isp_pinctrl...