Greetings Krysztof, Thanks for the feedback! I have several questions below: > > + > > +static ssize_t server_id_show(struct device *dev, struct > > +device_attribute *attr, char *buf) { > > + struct gxp_plreg_drvdata *drvdata = dev_get_drvdata(dev); > > + int value_upper; > > + int value_lower; > > + ssize_t ret; > > + u32 trans_offset; > > + u32 trans_shift; > > + > > + /* read upper first */ > > + address_translation(drvdata->server_id.upper[BYTE], > > + &trans_offset, > > + &trans_shift); > > + regmap_read(drvdata->plreg_map, trans_offset, &value_upper); > > + value_upper = value_upper >> trans_shift; > > + value_upper = value_upper & drvdata->server_id.upper[MASK]; > > + > > + /* read lower last */ > > + address_translation(drvdata->server_id.lower[BYTE], > > + &trans_offset, > > + &trans_shift); > > + regmap_read(drvdata->plreg_map, trans_offset, &value_lower); > > + value_lower = value_lower >> trans_shift; > > + value_lower = value_lower & drvdata->server_id.lower[MASK]; > > + > > + ret = sprintf(buf, "0x%04x", value_upper | value_lower); > > + > > + return ret; > > +} > > + > > +static DEVICE_ATTR_RO(server_id); > Missing sysfs documentation. Can you point me at the proper location / documentation for documenting sysfs? Thanks! > > + for (i = 0; i <= MASK; i++) { > > + if (of_property_read_u32_index(np, "grp5", i, > > + &drvdata->grp_intr_flags.grp5[i])) { > > + dev_err(&pdev->dev, > > + "grp5intsflags is missing its 'grp5' property index %d\n", i); > > + return -ENODEV; > > + } > > + } > > + > > + np = of_get_child_by_name(pdev->dev.of_node, "pwrbtn"); > > + if (!np) { > > + dev_err(&pdev->dev, "%pOF is missing its 'pwrbtn' node\n", np); > > + return -ENODEV; > > + } > > + > > + for (i = 0; i <= VALUE; i++) { > > + if (of_property_read_u32_index(np, "latch", i, > > +&drvdata->pwrbtn.latch[i])) { > Undocumented properties. NAK. If each child node of hpe,gxp-plreg were documented with their respective properties would this be acceptable? Such as: Fan-1 { Compatible="hpe,gxp-plreg-fan"; id = <0x27>; bit = <0x01>; fail = <0x24>; inst = <0x22>; }; > > + dev_err(&pdev->dev, "pwrbtn is missing its 'latch' property index %d\n", i); > > + return -ENODEV; > > + } > > + } > > + > > + drvdata->gpio_chip = plreg_chip; > > + drvdata->gpio_chip.ngpio = 100; > > + drvdata->gpio_chip.parent = &pdev->dev; > > + > > + girq = &drvdata->gpio_chip.irq; > > + girq->chip = &gxp_gpio_irqchip; > > + /* This will let us handle the parent IRQ in the driver */ > > + girq->parent_handler = NULL; > > + girq->num_parents = 0; > > + girq->parents = NULL; > > + girq->default_type = IRQ_TYPE_NONE; > > + girq->handler = handle_edge_irq; > > + /* Set up interrupt from PLREG Group 5 Mask */ > Please read Linux coding style. There is a chapter about size of functions. Read it. Actually, read the rest as well... It's ok if probe() grows above our limit, but this is huge. Really too big. I will do this and work on breaking up this code into smaller functions. Thanks, -Nick Hawkins