On Tue, Jan 31, 2017 at 9:43 PM, Hoan Tran <hotran@xxxxxxx> wrote: > Next generation of X-Gene SoC's GPIO hardware register map is very > similar to DW GPIO. It only differs by a few register addresses. > This patch modifies DW GPIO driver to accommodate the difference > in a few register addresses. > +#define GPIO_REG_OFFSET_V2 1 > +#define GPIO_INTMASK_V2 0x44 > +#define GPIO_INTTYPE_LEVEL_V2 0x34 > +#define GPIO_INT_POLARITY_V2 0x38 > +#define GPIO_INTSTATUS_V2 0x3c > +#define GPIO_PORTA_EOI_V2 0x40 > + > static inline u32 dwapb_read(struct dwapb_gpio *gpio, unsigned int offset) > { > struct gpio_chip *gc = &gpio->ports[0].gc; > void __iomem *reg_base = gpio->regs; > > - return gc->read_reg(reg_base + offset); > + return gc->read_reg(reg_base + gpio_reg_convert(gpio, offset)); And what prevents us to introduce special read_reg for that registers? Also what about to convert to regmap API? -- With Best Regards, Andy Shevchenko -- To unsubscribe from this list: send the line "unsubscribe linux-gpio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html