On 2015-03-25 17:28:24 [+0100], Stefan Agner wrote: > diff --git a/drivers/mtd/nand/vf610_nfc.c b/drivers/mtd/nand/vf610_nfc.c > new file mode 100644 > index 0000000..23c1510 > --- /dev/null > +++ b/drivers/mtd/nand/vf610_nfc.c > @@ -0,0 +1,686 @@ … > +static inline u32 vf610_nfc_read(struct vf610_nfc *nfc, uint reg) > +{ > + return readl(nfc->regs + reg); > +} > + > +static inline void vf610_nfc_write(struct vf610_nfc *nfc, uint reg, u32 val) > +{ > + writel(val, nfc->regs + reg); > +} … > +static void vf610_nfc_send_command(struct vf610_nfc *nfc, u32 cmd_byte1, > + u32 cmd_code) > +{ > + void __iomem *reg = nfc->regs + NFC_FLASH_CMD2; > + u32 tmp; > + > + vf610_nfc_clear_status(nfc); > + > + tmp = __raw_readl(reg); > + tmp &= ~(CMD_BYTE1_MASK | CMD_CODE_MASK | BUFNO_MASK); > + tmp |= cmd_byte1 << CMD_BYTE1_SHIFT; > + tmp |= cmd_code << CMD_CODE_SHIFT; > + __raw_writel(tmp, reg); > +} Why readl() vs __raw_readl() dito for write? vf610_nfc_{read|write} is good since for PPC we would need out_be32() here instead. It would be nice if you could abstract the __raw_ once as well. And I am not sure if you need those at all since the former functions should work here just fine. Sebastian -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html