nvmem_cell_read_u32
ret = nvmem_cell_read_u32(cpu_dev, "speed_grade", &cell_value);
ret = nvmem_cell_read_u32(dev, "speed_grade", &val);
ret = nvmem_cell_read_u32(dev, "speed_grade", &val);
EXPORT_SYMBOL_GPL(nvmem_cell_read_u32);
ret = nvmem_cell_read_u32(&pdev->dev, "calib", &ana0);
ret = nvmem_cell_read_u32(dev, "trim1", &trim1);
ret = nvmem_cell_read_u32(dev, "trim2", &trim2);
ret = nvmem_cell_read_u32(&pdev->dev, "calib", &val);
ret = nvmem_cell_read_u32(&pdev->dev, "temp_grade", &val);
int nvmem_cell_read_u32(struct device *dev, const char *cell_id, u32 *val);