nvmem_cell_read_u8
EXPORT_SYMBOL_GPL(nvmem_cell_read_u8);
ret = nvmem_cell_read_u8(battmgr->dev->parent, "charge_limit_en", &en);
ret = nvmem_cell_read_u8(battmgr->dev->parent, "charge_limit_end", &end_soc);
ret = nvmem_cell_read_u8(battmgr->dev->parent, "charge_limit_delta", &delta_soc);
ret = nvmem_cell_read_u8(&pdev->dev, "multi-chan-ddr", cfg_index);
int nvmem_cell_read_u8(struct device *dev, const char *cell_id, u8 *val);